Remeha GTW-08

Name: Remeha GTW-08
Brand: Remeha
SKU: 1b757224-f911-444a-8d4a-f20d7dd92f77

Modbus RTU interface for Remeha boilers and heat pumps with up to 12 heating zones.

The Remeha GTW-08 is a Modbus interface that connects Remeha boilers and heat pumps with an L-Bus controller to a building management system. This Modbus RTU template reads temperatures, water pressure, status, errors and counters of the appliance, cascade, buffer tank and up to 12 zones, and lets you write heat demand, zone modes and setpoints from ModbusCloud.

Protocol: Modbus RTU
Connection: RS485, 9600 baud
Registers: 1434, read and write

Brand: Remeha
Key readings: Flow temperature · Return temperature · Outdoor temperature · Water pressure · Appliance status · Error code · Zone room temperature · DHW tank temperature
Available commands: Heat demand setpoint · Zone mode · Room temperature setpoint · DHW setpoint · Heating curve · CH and DHW enable
Compatible models: GTW-08 · Remeha boilers and heat pumps with L-Bus controller (CU-GH, CU-OH, EHC) and a GTW-08 interface
Last updated: 14 October 2026

Registers (1434)

1434 read, 946 write

Name	Unit	Access
Flow Temperature	°C	Read
Return Temperature	°C	Read
Outside Temperature	°C	Read
Water Pressure	bar	Read
Flue Gas Temperature	°C	Read
Heat Pump Flow Temperature	°C	Read
Heat Pump Return Temperature	°C	Read
Flow Rate	l/min	Read
Appliance Status		Read
Appliance Sub Status		Read
Relative Power	%	Read
Actual Power	kW	Read
Power Setpoint Percent Of Max		Read
Ionisation Current		Read
CH Setpoint	°C	Read
DHW Internal Setpoint	°C	Read
Cooling Flow Setpoint	°C	Read
DHW Flow Temperature Setpoint	°C	Read
Season Mode		Read
Calculated COP		Read
COP Switch Threshold		Read
System Actual Power	%	Read
System Flow Temperature	°C	Read
System Return Temperature	°C	Read
Producer Status Bits		Read
Producer Special Request Bits		Read
Appliance Error Code		Read
Appliance Error Priority		Read
Appliance Status 1 Bits		Read
Appliance Status 2 Bits		Read
Heat Demand Power Setpoint	%	Read and write
Heat Demand Temperature Setpoint	°C	Read and write
Algorithm Type		Read and write
Heat Demand Type		Read and write
Internal Heat Demand Power	%	Read
Internal Heat Demand Temperature	°C	Read
Internal Heat Demand Type		Read
CH Enabled		Read and write
DHW Enabled		Read and write
Cooling Mode		Read and write
Cooling Forced		Read and write
Force Summer Mode		Read and write
Summer Winter Switch Temperature	°C	Read and write
Summer Winter Neutral Band	°C	Read and write
Frost Protection Outside Temperature	°C	Read and write
Mode Change End Time		Read and write
Burner Starts		Read
Burner Hours	h	Read
Backup 1 Starts		Read
Backup 1 Hours	h	Read
Backup 2 Starts		Read
Backup 2 Hours	h	Read
Operating Hours Total	h	Read
CH Energy Consumption	kWh	Read
DHW Energy Consumption	kWh	Read
Cooling Energy Consumption	kWh	Read
Total Energy Consumption	kWh	Read and write
Backup Energy Consumption	kWh	Read and write
Total Thermal Energy Delivered	kWh	Read and write
CH Thermal Energy Delivered	kWh	Read and write
DHW Thermal Energy Delivered	kWh	Read and write
Cooling Thermal Energy Delivered	kWh	Read and write
Backup Thermal Energy Delivered	kWh	Read and write
Pump Speed	%	Read and write
Main Control Burner Starts		Read
Main Control Burner Hours	h	Read
Main Control Service Starts		Read
Main Control Backup 1 Starts		Read
Main Control Backup 1 Hours	h	Read
Main Control Backup 2 Starts		Read
Main Control Backup 2 Hours	h	Read
Main Control Operating Hours	h	Read
Main Control Service Burning Hours	h	Read
Service Required		Read
Service Notification		Read
Service Burning Hours	h	Read
Service Operating Hours	h	Read
Service Starts		Read
Appliance On Error		Read
Board 1 Error Code		Read
Board 1 Error Priority		Read
Board 2 Error Code		Read
Board 2 Error Priority		Read
Board 3 Error Code		Read
Board 3 Error Priority		Read
Board 4 Error Code		Read
Board 4 Error Priority		Read
Board 5 Error Code		Read
Board 5 Error Priority		Read
Board 6 Error Code		Read
Board 6 Error Priority		Read
Board 7 Error Code		Read
Board 7 Error Priority		Read
Board 8 Error Code		Read
Board 8 Error Priority		Read
Board 9 Error Code		Read
Board 9 Error Priority		Read
Board 10 Error Code		Read
Board 10 Error Priority		Read
Number Of Boards		Read
Board 1 Device Type		Read
Board 1 Software Version		Read
Board 1 Config Table Version		Read
Board 1 Hardware Version		Read
Board 1 Article Number		Read
Board 2 Device Type		Read
Board 2 Software Version		Read
Board 2 Config Table Version		Read
Board 2 Hardware Version		Read
Board 2 Article Number		Read
Board 3 Device Type		Read
Board 3 Software Version		Read
Board 3 Config Table Version		Read
Board 3 Hardware Version		Read
Board 3 Article Number		Read
Board 4 Device Type		Read
Board 4 Software Version		Read
Board 4 Config Table Version		Read
Board 4 Hardware Version		Read
Board 4 Article Number		Read
Board 5 Device Type		Read
Board 5 Software Version		Read
Board 5 Config Table Version		Read
Board 5 Hardware Version		Read
Board 5 Article Number		Read
Board 6 Device Type		Read
Board 6 Software Version		Read
Board 6 Config Table Version		Read
Board 6 Hardware Version		Read
Board 6 Article Number		Read
Board 7 Device Type		Read
Board 7 Software Version		Read
Board 7 Config Table Version		Read
Board 7 Hardware Version		Read
Board 7 Article Number		Read
Board 8 Device Type		Read
Board 8 Software Version		Read
Board 8 Config Table Version		Read
Board 8 Hardware Version		Read
Board 8 Article Number		Read
Board 9 Device Type		Read
Board 9 Software Version		Read
Board 9 Config Table Version		Read
Board 9 Hardware Version		Read
Board 9 Article Number		Read
Board 10 Device Type		Read
Board 10 Software Version		Read
Board 10 Config Table Version		Read
Board 10 Hardware Version		Read
Board 10 Article Number		Read
Number Of Zones		Read
Number Of Zones Disabled		Read
Number Of CH Zones		Read
Number Of CH Cooling Zones		Read
Number Of DHW Zones		Read
Number Of Process Heat Zones		Read
Number Of Swimming Pool Zones		Read
Number Of Other Zones		Read
Buffer Tank Active		Read
Cascade Active		Read
Reset Discovery Table		Read and write
Manufacturer Code		Read
Gateway Device Type		Read
Fallback Heat Demand Mode		Read and write
Fallback Heat Demand Config		Read and write
Fallback Heat Demand Period	min	Read and write
Fallback Power Setpoint	%	Read and write
Fallback Temperature Setpoint	°C	Read and write
Fallback Heat Demand Type		Read and write
Analog Input Function		Read and write
Analog Input Value	V	Read and write
Cascade Flow Temperature	°C	Read
Cascade Return Temperature	°C	Read
Cascade LLH Flow Temperature	°C	Read
Cascade LLH Return Temperature	°C	Read
Cascade Appliance Number		Read and write
Cascade Mode		Read and write
Cascade Type		Read and write
Cascade Lead Appliance		Read and write
Cascade Inter Stage Time		Read and write
Cascade Parallel Heating Outside Temp	°C	Read and write
Cascade Parallel Cooling Outside Temp	°C	Read and write
Cascade Power Rise Time		Read and write
Cascade Management Type		Read and write
Cascade Permutation Type		Read and write
Cascade Power Control Strategy		Read and write
Cascade Preferred CH Producer		Read and write
Cascade Non Preferred CH Producer		Read and write
Cascade Late On Value	%	Read and write
Cascade Late Off Value	%	Read and write
Cascade Early On Value	%	Read and write
Cascade Early Off Value	%	Read and write
Cascade Primary Pump Type		Read and write
Cascade Secondary Pump Type		Read and write
Producer Activation Order		Read and write
Identified Producer Number		Read and write
Identified Producer State		Read and write
Cascade Producer Switch Interval	h	Read and write
Producer Min Power		Read and write
Producer Max Power		Read and write
Active Producers		Read
Temporary Producer Order		Read
Producer Main Status		Read
Producer Serial Number		Read
Cascade First Start Producer		Read
Cascade Producers Present		Read
Cascade Stages Available		Read
Cascade Stages Required		Read
Cascade Power Request	%	Read
Cascade Power Request Temperature	°C	Read
Cascade Power Request Type		Read
Cascade Calculated Power	%	Read
Cascade Calculated Temperature	°C	Read
Cascade Calculated Demand Type		Read
Cascade Requested Power	kW	Read
Cascade Requested Power Percent	%	Read
Cascade Primary Pump Status		Read
Cascade Secondary Pump Status		Read
Cascade State		Read
Cascade CH Hours	h	Read
Cascade DHW Hours	h	Read
Cascade Central Pump Status		Read
Producer Pump PWM	%	Read
Consumer Pump PWM	%	Read
Cascade Member 1 Power		Read
Cascade Member 1 Flow Temperature	°C	Read
Cascade Member 1 Status Bits		Read
Cascade Member 1 Special Request		Read
Cascade Member 3 Power		Read
Cascade Member 3 Flow Temperature	°C	Read
Cascade Member 3 Status Bits		Read
Cascade Member 3 Special Request		Read
Cascade Member 4 Power		Read
Cascade Member 4 Flow Temperature	°C	Read
Cascade Member 4 Status Bits		Read
Cascade Member 4 Special Request		Read
Cascade Member 5 Power		Read
Cascade Member 5 Flow Temperature	°C	Read
Cascade Member 5 Status Bits		Read
Cascade Member 5 Special Request		Read
Cascade Member 6 Power		Read
Cascade Member 6 Flow Temperature	°C	Read
Cascade Member 6 Status Bits		Read
Cascade Member 6 Special Request		Read
Cascade Member 7 Power		Read
Cascade Member 7 Flow Temperature	°C	Read
Cascade Member 7 Status Bits		Read
Cascade Member 7 Special Request		Read
Cascade Member 8 Power		Read
Cascade Member 8 Flow Temperature	°C	Read
Cascade Member 8 Status Bits		Read
Cascade Member 8 Special Request		Read
Cascade Member 9 Power		Read
Cascade Member 9 Flow Temperature	°C	Read
Cascade Member 9 Status Bits		Read
Cascade Member 9 Special Request		Read
Cascade Member 10 Power		Read
Cascade Member 10 Flow Temperature	°C	Read
Cascade Member 10 Status Bits		Read
Cascade Member 10 Special Request		Read
Buffer Temperature Bottom	°C	Read
Buffer Temperature Top	°C	Read
Buffer Pump State		Read
Buffer Mode		Read
Buffer Demand Power		Read
Buffer Demand Temperature	°C	Read
Buffer Demand Type		Read
Buffer Hysteresis Start		Read and write
Buffer Hysteresis Stop		Read and write
Buffer Pump Post Run		Read and write
Buffer Control Strategy		Read and write
Buffer Heating Setpoint	°C	Read and write
Buffer Cooling Setpoint	°C	Read and write
Buffer Slope		Read and write
Buffer Offset		Read and write
Buffer Time Program Monday		Read and write
Buffer Time Program Tuesday		Read and write
Buffer Time Program Wednesday		Read and write
Buffer Time Program Thursday		Read and write
Buffer Time Program Friday		Read and write
Buffer Time Program Saturday		Read and write
Buffer Time Program Sunday		Read and write
Zone 1 Flow Temperature	°C	Read
Zone 1 Flow Setpoint	°C	Read
Zone 1 Room Setpoint	°C	Read
Zone 1 Outside Temperature	°C	Read
Zone 1 Room Temperature	°C	Read
Zone 1 Room Temperature Measured		Read and write
Zone 1 DHW Tank Temperature Bottom	°C	Read
Zone 1 DHW Tank Temperature Top	°C	Read
Zone 1 Heat Demand Active		Read
Zone 1 Current Activity		Read
Zone 1 Current Mode		Read
Zone 1 Heating Mode		Read
Zone 1 Pump Running		Read
Zone 1 Mixing Valve Closing		Read
Zone 1 Mixing Valve Opening		Read
Zone 1 Pool Secondary Pump		Read
Zone 1 Electric Backup Output		Read
Zone 1 Pump Hours	h	Read
Zone 1 Pump Starts		Read
Zone 1 Type		Read
Zone 1 Function		Read
Zone 1 Short Name		Read
Zone 1 Board Device Type		Read
Zone 1 Board Instance		Read
Zone 1 Fixed Flow Setpoint	°C	Read and write
Zone 1 Mode		Read and write
Zone 1 Room Activity Setpoint 1	°C	Read and write
Zone 1 Room Activity Setpoint 2	°C	Read and write
Zone 1 Room Activity Setpoint 3	°C	Read and write
Zone 1 Room Activity Setpoint 4	°C	Read and write
Zone 1 Room Activity Setpoint 5	°C	Read and write
Zone 1 Room Reduced Setpoint	°C	Read and write
Zone 1 Room Cooling Setpoint 1	°C	Read and write
Zone 1 Room Cooling Setpoint 2	°C	Read and write
Zone 1 Room Cooling Setpoint 3	°C	Read and write
Zone 1 Room Cooling Setpoint 4	°C	Read and write
Zone 1 Room Cooling Setpoint 5	°C	Read and write
Zone 1 Room Cooling Reduced Setpoint	°C	Read and write
Zone 1 Room Holiday Setpoint	°C	Read and write
Zone 1 Room Temporary Setpoint	°C	Read and write
Zone 1 Room Manual Setpoint	°C	Read and write
Zone 1 DHW Comfort Setpoint	°C	Read and write
Zone 1 DHW Reduced Setpoint	°C	Read and write
Zone 1 DHW Holiday Setpoint	°C	Read and write
Zone 1 DHW Anti Legionella Setpoint	°C	Read and write
Zone 1 Swimming Pool Setpoint	°C	Read and write
Zone 1 Process Heat Setpoint	°C	Read and write
Zone 1 Heating Control Strategy		Read and write
Zone 1 Max Flow Setpoint	°C	Read and write
Zone 1 Cooling Flow Setpoint	°C	Read and write
Zone 1 Heating Curve Slope		Read and write
Zone 1 Heating Curve Footpoint Comfort	°C	Read and write
Zone 1 Heating Curve Footpoint Reduced	°C	Read and write
Zone 1 Max Preheat Time		Read and write
Zone 1 Mixing Valve Shift		Read and write
Zone 1 Mixing Valve Bandwidth		Read and write
Zone 1 DHW Hysteresis		Read and write
Zone 1 DHW Calorifier Offset		Read and write
Zone 1 DHW Calorifier Setpoint Raise		Read and write
Zone 1 Process Heat Hysteresis On		Read and write
Zone 1 Process Heat Hysteresis Off		Read and write
Zone 1 Process Heat Setpoint Raise		Read and write
Zone 1 DHW Start Hysteresis		Read and write
Zone 1 Pump Post Run		Read and write
Zone 1 Selected Time Program		Read and write
Zone 1 Program 1 Monday		Read and write
Zone 1 Program 1 Tuesday		Read and write
Zone 1 Program 1 Wednesday		Read and write
Zone 1 Program 1 Thursday		Read and write
Zone 1 Program 1 Friday		Read and write
Zone 1 Program 1 Saturday		Read and write
Zone 1 Program 1 Sunday		Read and write
Zone 1 Program 2 Monday		Read and write
Zone 1 Program 2 Tuesday		Read and write
Zone 1 Program 2 Wednesday		Read and write
Zone 1 Program 2 Thursday		Read and write
Zone 1 Program 2 Friday		Read and write
Zone 1 Program 2 Saturday		Read and write
Zone 1 Program 2 Sunday		Read and write
Zone 1 Program 3 Monday		Read and write
Zone 1 Program 3 Tuesday		Read and write
Zone 1 Program 3 Wednesday		Read and write
Zone 1 Program 3 Thursday		Read and write
Zone 1 Program 3 Friday		Read and write
Zone 1 Program 3 Saturday		Read and write
Zone 1 Program 3 Sunday		Read and write
Zone 1 Program 4 Monday		Read and write
Zone 1 Program 4 Tuesday		Read and write
Zone 1 Program 4 Wednesday		Read and write
Zone 1 Program 4 Thursday		Read and write
Zone 1 Program 4 Friday		Read and write
Zone 1 Program 4 Saturday		Read and write
Zone 1 Program 4 Sunday		Read and write
Zone 1 Holiday Start		Read and write
Zone 1 Holiday End		Read and write
Zone 1 Mode Change End		Read and write
Zone 2 Flow Temperature	°C	Read
Zone 2 Flow Setpoint	°C	Read
Zone 2 Room Setpoint	°C	Read
Zone 2 Outside Temperature	°C	Read
Zone 2 Room Temperature	°C	Read
Zone 2 Room Temperature Measured		Read and write
Zone 2 DHW Tank Temperature Bottom	°C	Read
Zone 2 DHW Tank Temperature Top	°C	Read
Zone 2 Heat Demand Active		Read
Zone 2 Current Activity		Read
Zone 2 Current Mode		Read
Zone 2 Heating Mode		Read
Zone 2 Pump Running		Read
Zone 2 Mixing Valve Closing		Read
Zone 2 Mixing Valve Opening		Read
Zone 2 Pool Secondary Pump		Read
Zone 2 Electric Backup Output		Read
Zone 2 Pump Hours	h	Read
Zone 2 Pump Starts		Read
Zone 2 Type		Read
Zone 2 Function		Read
Zone 2 Short Name		Read
Zone 2 Board Device Type		Read
Zone 2 Board Instance		Read
Zone 2 Fixed Flow Setpoint	°C	Read and write
Zone 2 Mode		Read and write
Zone 2 Room Activity Setpoint 1	°C	Read and write
Zone 2 Room Activity Setpoint 2	°C	Read and write
Zone 2 Room Activity Setpoint 3	°C	Read and write
Zone 2 Room Activity Setpoint 4	°C	Read and write
Zone 2 Room Activity Setpoint 5	°C	Read and write
Zone 2 Room Reduced Setpoint	°C	Read and write
Zone 2 Room Cooling Setpoint 1	°C	Read and write
Zone 2 Room Cooling Setpoint 2	°C	Read and write
Zone 2 Room Cooling Setpoint 3	°C	Read and write
Zone 2 Room Cooling Setpoint 4	°C	Read and write
Zone 2 Room Cooling Setpoint 5	°C	Read and write
Zone 2 Room Cooling Reduced Setpoint	°C	Read and write
Zone 2 Room Holiday Setpoint	°C	Read and write
Zone 2 Room Temporary Setpoint	°C	Read and write
Zone 2 Room Manual Setpoint	°C	Read and write
Zone 2 DHW Comfort Setpoint	°C	Read and write
Zone 2 DHW Reduced Setpoint	°C	Read and write
Zone 2 DHW Holiday Setpoint	°C	Read and write
Zone 2 DHW Anti Legionella Setpoint	°C	Read and write
Zone 2 Swimming Pool Setpoint	°C	Read and write
Zone 2 Process Heat Setpoint	°C	Read and write
Zone 2 Heating Control Strategy		Read and write
Zone 2 Max Flow Setpoint	°C	Read and write
Zone 2 Cooling Flow Setpoint	°C	Read and write
Zone 2 Heating Curve Slope		Read and write
Zone 2 Heating Curve Footpoint Comfort	°C	Read and write
Zone 2 Heating Curve Footpoint Reduced	°C	Read and write
Zone 2 Max Preheat Time		Read and write
Zone 2 Mixing Valve Shift		Read and write
Zone 2 Mixing Valve Bandwidth		Read and write
Zone 2 DHW Hysteresis		Read and write
Zone 2 DHW Calorifier Offset		Read and write
Zone 2 DHW Calorifier Setpoint Raise		Read and write
Zone 2 Process Heat Hysteresis On		Read and write
Zone 2 Process Heat Hysteresis Off		Read and write
Zone 2 Process Heat Setpoint Raise		Read and write
Zone 2 DHW Start Hysteresis		Read and write
Zone 2 Pump Post Run		Read and write
Zone 2 Selected Time Program		Read and write
Zone 2 Program 1 Monday		Read and write
Zone 2 Program 1 Tuesday		Read and write
Zone 2 Program 1 Wednesday		Read and write
Zone 2 Program 1 Thursday		Read and write
Zone 2 Program 1 Friday		Read and write
Zone 2 Program 1 Saturday		Read and write
Zone 2 Program 1 Sunday		Read and write
Zone 2 Program 2 Monday		Read and write
Zone 2 Program 2 Tuesday		Read and write
Zone 2 Program 2 Wednesday		Read and write
Zone 2 Program 2 Thursday		Read and write
Zone 2 Program 2 Friday		Read and write
Zone 2 Program 2 Saturday		Read and write
Zone 2 Program 2 Sunday		Read and write
Zone 2 Program 3 Monday		Read and write
Zone 2 Program 3 Tuesday		Read and write
Zone 2 Program 3 Wednesday		Read and write
Zone 2 Program 3 Thursday		Read and write
Zone 2 Program 3 Friday		Read and write
Zone 2 Program 3 Saturday		Read and write
Zone 2 Program 3 Sunday		Read and write
Zone 2 Program 4 Monday		Read and write
Zone 2 Program 4 Tuesday		Read and write
Zone 2 Program 4 Wednesday		Read and write
Zone 2 Program 4 Thursday		Read and write
Zone 2 Program 4 Friday		Read and write
Zone 2 Program 4 Saturday		Read and write
Zone 2 Program 4 Sunday		Read and write
Zone 2 Holiday Start		Read and write
Zone 2 Holiday End		Read and write
Zone 2 Mode Change End		Read and write
Zone 3 Flow Temperature	°C	Read
Zone 3 Flow Setpoint	°C	Read
Zone 3 Room Setpoint	°C	Read
Zone 3 Outside Temperature	°C	Read
Zone 3 Room Temperature	°C	Read
Zone 3 Room Temperature Measured		Read and write
Zone 3 DHW Tank Temperature Bottom	°C	Read
Zone 3 DHW Tank Temperature Top	°C	Read
Zone 3 Heat Demand Active		Read
Zone 3 Current Activity		Read
Zone 3 Current Mode		Read
Zone 3 Heating Mode		Read
Zone 3 Pump Running		Read
Zone 3 Mixing Valve Closing		Read
Zone 3 Mixing Valve Opening		Read
Zone 3 Pool Secondary Pump		Read
Zone 3 Electric Backup Output		Read
Zone 3 Pump Hours	h	Read
Zone 3 Pump Starts		Read
Zone 3 Type		Read
Zone 3 Function		Read
Zone 3 Short Name		Read
Zone 3 Board Device Type		Read
Zone 3 Board Instance		Read
Zone 3 Fixed Flow Setpoint	°C	Read and write
Zone 3 Mode		Read and write
Zone 3 Room Activity Setpoint 1	°C	Read and write
Zone 3 Room Activity Setpoint 2	°C	Read and write
Zone 3 Room Activity Setpoint 3	°C	Read and write
Zone 3 Room Activity Setpoint 4	°C	Read and write
Zone 3 Room Activity Setpoint 5	°C	Read and write
Zone 3 Room Reduced Setpoint	°C	Read and write
Zone 3 Room Cooling Setpoint 1	°C	Read and write
Zone 3 Room Cooling Setpoint 2	°C	Read and write
Zone 3 Room Cooling Setpoint 3	°C	Read and write
Zone 3 Room Cooling Setpoint 4	°C	Read and write
Zone 3 Room Cooling Setpoint 5	°C	Read and write
Zone 3 Room Cooling Reduced Setpoint	°C	Read and write
Zone 3 Room Holiday Setpoint	°C	Read and write
Zone 3 Room Temporary Setpoint	°C	Read and write
Zone 3 Room Manual Setpoint	°C	Read and write
Zone 3 DHW Comfort Setpoint	°C	Read and write
Zone 3 DHW Reduced Setpoint	°C	Read and write
Zone 3 DHW Holiday Setpoint	°C	Read and write
Zone 3 DHW Anti Legionella Setpoint	°C	Read and write
Zone 3 Swimming Pool Setpoint	°C	Read and write
Zone 3 Process Heat Setpoint	°C	Read and write
Zone 3 Heating Control Strategy		Read and write
Zone 3 Max Flow Setpoint	°C	Read and write
Zone 3 Cooling Flow Setpoint	°C	Read and write
Zone 3 Heating Curve Slope		Read and write
Zone 3 Heating Curve Footpoint Comfort	°C	Read and write
Zone 3 Heating Curve Footpoint Reduced	°C	Read and write
Zone 3 Max Preheat Time		Read and write
Zone 3 Mixing Valve Shift		Read and write
Zone 3 Mixing Valve Bandwidth		Read and write
Zone 3 DHW Hysteresis		Read and write
Zone 3 DHW Calorifier Offset		Read and write
Zone 3 DHW Calorifier Setpoint Raise		Read and write
Zone 3 Process Heat Hysteresis On		Read and write
Zone 3 Process Heat Hysteresis Off		Read and write
Zone 3 Process Heat Setpoint Raise		Read and write
Zone 3 DHW Start Hysteresis		Read and write
Zone 3 Pump Post Run		Read and write
Zone 3 Selected Time Program		Read and write
Zone 3 Program 1 Monday		Read and write
Zone 3 Program 1 Tuesday		Read and write
Zone 3 Program 1 Wednesday		Read and write
Zone 3 Program 1 Thursday		Read and write
Zone 3 Program 1 Friday		Read and write
Zone 3 Program 1 Saturday		Read and write
Zone 3 Program 1 Sunday		Read and write
Zone 3 Program 2 Monday		Read and write
Zone 3 Program 2 Tuesday		Read and write
Zone 3 Program 2 Wednesday		Read and write
Zone 3 Program 2 Thursday		Read and write
Zone 3 Program 2 Friday		Read and write
Zone 3 Program 2 Saturday		Read and write
Zone 3 Program 2 Sunday		Read and write
Zone 3 Program 3 Monday		Read and write
Zone 3 Program 3 Tuesday		Read and write
Zone 3 Program 3 Wednesday		Read and write
Zone 3 Program 3 Thursday		Read and write
Zone 3 Program 3 Friday		Read and write
Zone 3 Program 3 Saturday		Read and write
Zone 3 Program 3 Sunday		Read and write
Zone 3 Program 4 Monday		Read and write
Zone 3 Program 4 Tuesday		Read and write
Zone 3 Program 4 Wednesday		Read and write
Zone 3 Program 4 Thursday		Read and write
Zone 3 Program 4 Friday		Read and write
Zone 3 Program 4 Saturday		Read and write
Zone 3 Program 4 Sunday		Read and write
Zone 3 Holiday Start		Read and write
Zone 3 Holiday End		Read and write
Zone 3 Mode Change End		Read and write
Zone 4 Flow Temperature	°C	Read
Zone 4 Flow Setpoint	°C	Read
Zone 4 Room Setpoint	°C	Read
Zone 4 Outside Temperature	°C	Read
Zone 4 Room Temperature	°C	Read
Zone 4 Room Temperature Measured		Read and write
Zone 4 DHW Tank Temperature Bottom	°C	Read
Zone 4 DHW Tank Temperature Top	°C	Read
Zone 4 Heat Demand Active		Read
Zone 4 Current Activity		Read
Zone 4 Current Mode		Read
Zone 4 Heating Mode		Read
Zone 4 Pump Running		Read
Zone 4 Mixing Valve Closing		Read
Zone 4 Mixing Valve Opening		Read
Zone 4 Pool Secondary Pump		Read
Zone 4 Electric Backup Output		Read
Zone 4 Pump Hours	h	Read
Zone 4 Pump Starts		Read
Zone 4 Type		Read
Zone 4 Function		Read
Zone 4 Short Name		Read
Zone 4 Board Device Type		Read
Zone 4 Board Instance		Read
Zone 4 Fixed Flow Setpoint	°C	Read and write
Zone 4 Mode		Read and write
Zone 4 Room Activity Setpoint 1	°C	Read and write
Zone 4 Room Activity Setpoint 2	°C	Read and write
Zone 4 Room Activity Setpoint 3	°C	Read and write
Zone 4 Room Activity Setpoint 4	°C	Read and write
Zone 4 Room Activity Setpoint 5	°C	Read and write
Zone 4 Room Reduced Setpoint	°C	Read and write
Zone 4 Room Cooling Setpoint 1	°C	Read and write
Zone 4 Room Cooling Setpoint 2	°C	Read and write
Zone 4 Room Cooling Setpoint 3	°C	Read and write
Zone 4 Room Cooling Setpoint 4	°C	Read and write
Zone 4 Room Cooling Setpoint 5	°C	Read and write
Zone 4 Room Cooling Reduced Setpoint	°C	Read and write
Zone 4 Room Holiday Setpoint	°C	Read and write
Zone 4 Room Temporary Setpoint	°C	Read and write
Zone 4 Room Manual Setpoint	°C	Read and write
Zone 4 DHW Comfort Setpoint	°C	Read and write
Zone 4 DHW Reduced Setpoint	°C	Read and write
Zone 4 DHW Holiday Setpoint	°C	Read and write
Zone 4 DHW Anti Legionella Setpoint	°C	Read and write
Zone 4 Swimming Pool Setpoint	°C	Read and write
Zone 4 Process Heat Setpoint	°C	Read and write
Zone 4 Heating Control Strategy		Read and write
Zone 4 Max Flow Setpoint	°C	Read and write
Zone 4 Cooling Flow Setpoint	°C	Read and write
Zone 4 Heating Curve Slope		Read and write
Zone 4 Heating Curve Footpoint Comfort	°C	Read and write
Zone 4 Heating Curve Footpoint Reduced	°C	Read and write
Zone 4 Max Preheat Time		Read and write
Zone 4 Mixing Valve Shift		Read and write
Zone 4 Mixing Valve Bandwidth		Read and write
Zone 4 DHW Hysteresis		Read and write
Zone 4 DHW Calorifier Offset		Read and write
Zone 4 DHW Calorifier Setpoint Raise		Read and write
Zone 4 Process Heat Hysteresis On		Read and write
Zone 4 Process Heat Hysteresis Off		Read and write
Zone 4 Process Heat Setpoint Raise		Read and write
Zone 4 DHW Start Hysteresis		Read and write
Zone 4 Pump Post Run		Read and write
Zone 4 Selected Time Program		Read and write
Zone 4 Program 1 Monday		Read and write
Zone 4 Program 1 Tuesday		Read and write
Zone 4 Program 1 Wednesday		Read and write
Zone 4 Program 1 Thursday		Read and write
Zone 4 Program 1 Friday		Read and write
Zone 4 Program 1 Saturday		Read and write
Zone 4 Program 1 Sunday		Read and write
Zone 4 Program 2 Monday		Read and write
Zone 4 Program 2 Tuesday		Read and write
Zone 4 Program 2 Wednesday		Read and write
Zone 4 Program 2 Thursday		Read and write
Zone 4 Program 2 Friday		Read and write
Zone 4 Program 2 Saturday		Read and write
Zone 4 Program 2 Sunday		Read and write
Zone 4 Program 3 Monday		Read and write
Zone 4 Program 3 Tuesday		Read and write
Zone 4 Program 3 Wednesday		Read and write
Zone 4 Program 3 Thursday		Read and write
Zone 4 Program 3 Friday		Read and write
Zone 4 Program 3 Saturday		Read and write
Zone 4 Program 3 Sunday		Read and write
Zone 4 Program 4 Monday		Read and write
Zone 4 Program 4 Tuesday		Read and write
Zone 4 Program 4 Wednesday		Read and write
Zone 4 Program 4 Thursday		Read and write
Zone 4 Program 4 Friday		Read and write
Zone 4 Program 4 Saturday		Read and write
Zone 4 Program 4 Sunday		Read and write
Zone 4 Holiday Start		Read and write
Zone 4 Holiday End		Read and write
Zone 4 Mode Change End		Read and write
Zone 5 Flow Temperature	°C	Read
Zone 5 Flow Setpoint	°C	Read
Zone 5 Room Setpoint	°C	Read
Zone 5 Outside Temperature	°C	Read
Zone 5 Room Temperature	°C	Read
Zone 5 Room Temperature Measured		Read and write
Zone 5 DHW Tank Temperature Bottom	°C	Read
Zone 5 DHW Tank Temperature Top	°C	Read
Zone 5 Heat Demand Active		Read
Zone 5 Current Activity		Read
Zone 5 Current Mode		Read
Zone 5 Heating Mode		Read
Zone 5 Pump Running		Read
Zone 5 Mixing Valve Closing		Read
Zone 5 Mixing Valve Opening		Read
Zone 5 Pool Secondary Pump		Read
Zone 5 Electric Backup Output		Read
Zone 5 Pump Hours	h	Read
Zone 5 Pump Starts		Read
Zone 5 Type		Read
Zone 5 Function		Read
Zone 5 Short Name		Read
Zone 5 Board Device Type		Read
Zone 5 Board Instance		Read
Zone 5 Fixed Flow Setpoint	°C	Read and write
Zone 5 Mode		Read and write
Zone 5 Room Activity Setpoint 1	°C	Read and write
Zone 5 Room Activity Setpoint 2	°C	Read and write
Zone 5 Room Activity Setpoint 3	°C	Read and write
Zone 5 Room Activity Setpoint 4	°C	Read and write
Zone 5 Room Activity Setpoint 5	°C	Read and write
Zone 5 Room Reduced Setpoint	°C	Read and write
Zone 5 Room Cooling Setpoint 1	°C	Read and write
Zone 5 Room Cooling Setpoint 2	°C	Read and write
Zone 5 Room Cooling Setpoint 3	°C	Read and write
Zone 5 Room Cooling Setpoint 4	°C	Read and write
Zone 5 Room Cooling Setpoint 5	°C	Read and write
Zone 5 Room Cooling Reduced Setpoint	°C	Read and write
Zone 5 Room Holiday Setpoint	°C	Read and write
Zone 5 Room Temporary Setpoint	°C	Read and write
Zone 5 Room Manual Setpoint	°C	Read and write
Zone 5 DHW Comfort Setpoint	°C	Read and write
Zone 5 DHW Reduced Setpoint	°C	Read and write
Zone 5 DHW Holiday Setpoint	°C	Read and write
Zone 5 DHW Anti Legionella Setpoint	°C	Read and write
Zone 5 Swimming Pool Setpoint	°C	Read and write
Zone 5 Process Heat Setpoint	°C	Read and write
Zone 5 Heating Control Strategy		Read and write
Zone 5 Max Flow Setpoint	°C	Read and write
Zone 5 Cooling Flow Setpoint	°C	Read and write
Zone 5 Heating Curve Slope		Read and write
Zone 5 Heating Curve Footpoint Comfort	°C	Read and write
Zone 5 Heating Curve Footpoint Reduced	°C	Read and write
Zone 5 Max Preheat Time		Read and write
Zone 5 Mixing Valve Shift		Read and write
Zone 5 Mixing Valve Bandwidth		Read and write
Zone 5 DHW Hysteresis		Read and write
Zone 5 DHW Calorifier Offset		Read and write
Zone 5 DHW Calorifier Setpoint Raise		Read and write
Zone 5 Process Heat Hysteresis On		Read and write
Zone 5 Process Heat Hysteresis Off		Read and write
Zone 5 Process Heat Setpoint Raise		Read and write
Zone 5 DHW Start Hysteresis		Read and write
Zone 5 Pump Post Run		Read and write
Zone 5 Selected Time Program		Read and write
Zone 5 Program 1 Monday		Read and write
Zone 5 Program 1 Tuesday		Read and write
Zone 5 Program 1 Wednesday		Read and write
Zone 5 Program 1 Thursday		Read and write
Zone 5 Program 1 Friday		Read and write
Zone 5 Program 1 Saturday		Read and write
Zone 5 Program 1 Sunday		Read and write
Zone 5 Program 2 Monday		Read and write
Zone 5 Program 2 Tuesday		Read and write
Zone 5 Program 2 Wednesday		Read and write
Zone 5 Program 2 Thursday		Read and write
Zone 5 Program 2 Friday		Read and write
Zone 5 Program 2 Saturday		Read and write
Zone 5 Program 2 Sunday		Read and write
Zone 5 Program 3 Monday		Read and write
Zone 5 Program 3 Tuesday		Read and write
Zone 5 Program 3 Wednesday		Read and write
Zone 5 Program 3 Thursday		Read and write
Zone 5 Program 3 Friday		Read and write
Zone 5 Program 3 Saturday		Read and write
Zone 5 Program 3 Sunday		Read and write
Zone 5 Program 4 Monday		Read and write
Zone 5 Program 4 Tuesday		Read and write
Zone 5 Program 4 Wednesday		Read and write
Zone 5 Program 4 Thursday		Read and write
Zone 5 Program 4 Friday		Read and write
Zone 5 Program 4 Saturday		Read and write
Zone 5 Program 4 Sunday		Read and write
Zone 5 Holiday Start		Read and write
Zone 5 Holiday End		Read and write
Zone 5 Mode Change End		Read and write
Zone 6 Flow Temperature	°C	Read
Zone 6 Flow Setpoint	°C	Read
Zone 6 Room Setpoint	°C	Read
Zone 6 Outside Temperature	°C	Read
Zone 6 Room Temperature	°C	Read
Zone 6 Room Temperature Measured		Read and write
Zone 6 DHW Tank Temperature Bottom	°C	Read
Zone 6 DHW Tank Temperature Top	°C	Read
Zone 6 Heat Demand Active		Read
Zone 6 Current Activity		Read
Zone 6 Current Mode		Read
Zone 6 Heating Mode		Read
Zone 6 Pump Running		Read
Zone 6 Mixing Valve Closing		Read
Zone 6 Mixing Valve Opening		Read
Zone 6 Pool Secondary Pump		Read
Zone 6 Electric Backup Output		Read
Zone 6 Pump Hours	h	Read
Zone 6 Pump Starts		Read
Zone 6 Type		Read
Zone 6 Function		Read
Zone 6 Short Name		Read
Zone 6 Board Device Type		Read
Zone 6 Board Instance		Read
Zone 6 Fixed Flow Setpoint	°C	Read and write
Zone 6 Mode		Read and write
Zone 6 Room Activity Setpoint 1	°C	Read and write
Zone 6 Room Activity Setpoint 2	°C	Read and write
Zone 6 Room Activity Setpoint 3	°C	Read and write
Zone 6 Room Activity Setpoint 4	°C	Read and write
Zone 6 Room Activity Setpoint 5	°C	Read and write
Zone 6 Room Reduced Setpoint	°C	Read and write
Zone 6 Room Cooling Setpoint 1	°C	Read and write
Zone 6 Room Cooling Setpoint 2	°C	Read and write
Zone 6 Room Cooling Setpoint 3	°C	Read and write
Zone 6 Room Cooling Setpoint 4	°C	Read and write
Zone 6 Room Cooling Setpoint 5	°C	Read and write
Zone 6 Room Cooling Reduced Setpoint	°C	Read and write
Zone 6 Room Holiday Setpoint	°C	Read and write
Zone 6 Room Temporary Setpoint	°C	Read and write
Zone 6 Room Manual Setpoint	°C	Read and write
Zone 6 DHW Comfort Setpoint	°C	Read and write
Zone 6 DHW Reduced Setpoint	°C	Read and write
Zone 6 DHW Holiday Setpoint	°C	Read and write
Zone 6 DHW Anti Legionella Setpoint	°C	Read and write
Zone 6 Swimming Pool Setpoint	°C	Read and write
Zone 6 Process Heat Setpoint	°C	Read and write
Zone 6 Heating Control Strategy		Read and write
Zone 6 Max Flow Setpoint	°C	Read and write
Zone 6 Cooling Flow Setpoint	°C	Read and write
Zone 6 Heating Curve Slope		Read and write
Zone 6 Heating Curve Footpoint Comfort	°C	Read and write
Zone 6 Heating Curve Footpoint Reduced	°C	Read and write
Zone 6 Max Preheat Time		Read and write
Zone 6 Mixing Valve Shift		Read and write
Zone 6 Mixing Valve Bandwidth		Read and write
Zone 6 DHW Hysteresis		Read and write
Zone 6 DHW Calorifier Offset		Read and write
Zone 6 DHW Calorifier Setpoint Raise		Read and write
Zone 6 Process Heat Hysteresis On		Read and write
Zone 6 Process Heat Hysteresis Off		Read and write
Zone 6 Process Heat Setpoint Raise		Read and write
Zone 6 DHW Start Hysteresis		Read and write
Zone 6 Pump Post Run		Read and write
Zone 6 Selected Time Program		Read and write
Zone 6 Program 1 Monday		Read and write
Zone 6 Program 1 Tuesday		Read and write
Zone 6 Program 1 Wednesday		Read and write
Zone 6 Program 1 Thursday		Read and write
Zone 6 Program 1 Friday		Read and write
Zone 6 Program 1 Saturday		Read and write
Zone 6 Program 1 Sunday		Read and write
Zone 6 Program 2 Monday		Read and write
Zone 6 Program 2 Tuesday		Read and write
Zone 6 Program 2 Wednesday		Read and write
Zone 6 Program 2 Thursday		Read and write
Zone 6 Program 2 Friday		Read and write
Zone 6 Program 2 Saturday		Read and write
Zone 6 Program 2 Sunday		Read and write
Zone 6 Program 3 Monday		Read and write
Zone 6 Program 3 Tuesday		Read and write
Zone 6 Program 3 Wednesday		Read and write
Zone 6 Program 3 Thursday		Read and write
Zone 6 Program 3 Friday		Read and write
Zone 6 Program 3 Saturday		Read and write
Zone 6 Program 3 Sunday		Read and write
Zone 6 Program 4 Monday		Read and write
Zone 6 Program 4 Tuesday		Read and write
Zone 6 Program 4 Wednesday		Read and write
Zone 6 Program 4 Thursday		Read and write
Zone 6 Program 4 Friday		Read and write
Zone 6 Program 4 Saturday		Read and write
Zone 6 Program 4 Sunday		Read and write
Zone 6 Holiday Start		Read and write
Zone 6 Holiday End		Read and write
Zone 6 Mode Change End		Read and write
Zone 7 Flow Temperature	°C	Read
Zone 7 Flow Setpoint	°C	Read
Zone 7 Room Setpoint	°C	Read
Zone 7 Outside Temperature	°C	Read
Zone 7 Room Temperature	°C	Read
Zone 7 Room Temperature Measured		Read and write
Zone 7 DHW Tank Temperature Bottom	°C	Read
Zone 7 DHW Tank Temperature Top	°C	Read
Zone 7 Heat Demand Active		Read
Zone 7 Current Activity		Read
Zone 7 Current Mode		Read
Zone 7 Heating Mode		Read
Zone 7 Pump Running		Read
Zone 7 Mixing Valve Closing		Read
Zone 7 Mixing Valve Opening		Read
Zone 7 Pool Secondary Pump		Read
Zone 7 Electric Backup Output		Read
Zone 7 Pump Hours	h	Read
Zone 7 Pump Starts		Read
Zone 7 Type		Read
Zone 7 Function		Read
Zone 7 Short Name		Read
Zone 7 Board Device Type		Read
Zone 7 Board Instance		Read
Zone 7 Fixed Flow Setpoint	°C	Read and write
Zone 7 Mode		Read and write
Zone 7 Room Activity Setpoint 1	°C	Read and write
Zone 7 Room Activity Setpoint 2	°C	Read and write
Zone 7 Room Activity Setpoint 3	°C	Read and write
Zone 7 Room Activity Setpoint 4	°C	Read and write
Zone 7 Room Activity Setpoint 5	°C	Read and write
Zone 7 Room Reduced Setpoint	°C	Read and write
Zone 7 Room Cooling Setpoint 1	°C	Read and write
Zone 7 Room Cooling Setpoint 2	°C	Read and write
Zone 7 Room Cooling Setpoint 3	°C	Read and write
Zone 7 Room Cooling Setpoint 4	°C	Read and write
Zone 7 Room Cooling Setpoint 5	°C	Read and write
Zone 7 Room Cooling Reduced Setpoint	°C	Read and write
Zone 7 Room Holiday Setpoint	°C	Read and write
Zone 7 Room Temporary Setpoint	°C	Read and write
Zone 7 Room Manual Setpoint	°C	Read and write
Zone 7 DHW Comfort Setpoint	°C	Read and write
Zone 7 DHW Reduced Setpoint	°C	Read and write
Zone 7 DHW Holiday Setpoint	°C	Read and write
Zone 7 DHW Anti Legionella Setpoint	°C	Read and write
Zone 7 Swimming Pool Setpoint	°C	Read and write
Zone 7 Process Heat Setpoint	°C	Read and write
Zone 7 Heating Control Strategy		Read and write
Zone 7 Max Flow Setpoint	°C	Read and write
Zone 7 Cooling Flow Setpoint	°C	Read and write
Zone 7 Heating Curve Slope		Read and write
Zone 7 Heating Curve Footpoint Comfort	°C	Read and write
Zone 7 Heating Curve Footpoint Reduced	°C	Read and write
Zone 7 Max Preheat Time		Read and write
Zone 7 Mixing Valve Shift		Read and write
Zone 7 Mixing Valve Bandwidth		Read and write
Zone 7 DHW Hysteresis		Read and write
Zone 7 DHW Calorifier Offset		Read and write
Zone 7 DHW Calorifier Setpoint Raise		Read and write
Zone 7 Process Heat Hysteresis On		Read and write
Zone 7 Process Heat Hysteresis Off		Read and write
Zone 7 Process Heat Setpoint Raise		Read and write
Zone 7 DHW Start Hysteresis		Read and write
Zone 7 Pump Post Run		Read and write
Zone 7 Selected Time Program		Read and write
Zone 7 Program 1 Monday		Read and write
Zone 7 Program 1 Tuesday		Read and write
Zone 7 Program 1 Wednesday		Read and write
Zone 7 Program 1 Thursday		Read and write
Zone 7 Program 1 Friday		Read and write
Zone 7 Program 1 Saturday		Read and write
Zone 7 Program 1 Sunday		Read and write
Zone 7 Program 2 Monday		Read and write
Zone 7 Program 2 Tuesday		Read and write
Zone 7 Program 2 Wednesday		Read and write
Zone 7 Program 2 Thursday		Read and write
Zone 7 Program 2 Friday		Read and write
Zone 7 Program 2 Saturday		Read and write
Zone 7 Program 2 Sunday		Read and write
Zone 7 Program 3 Monday		Read and write
Zone 7 Program 3 Tuesday		Read and write
Zone 7 Program 3 Wednesday		Read and write
Zone 7 Program 3 Thursday		Read and write
Zone 7 Program 3 Friday		Read and write
Zone 7 Program 3 Saturday		Read and write
Zone 7 Program 3 Sunday		Read and write
Zone 7 Program 4 Monday		Read and write
Zone 7 Program 4 Tuesday		Read and write
Zone 7 Program 4 Wednesday		Read and write
Zone 7 Program 4 Thursday		Read and write
Zone 7 Program 4 Friday		Read and write
Zone 7 Program 4 Saturday		Read and write
Zone 7 Program 4 Sunday		Read and write
Zone 7 Holiday Start		Read and write
Zone 7 Holiday End		Read and write
Zone 7 Mode Change End		Read and write
Zone 8 Flow Temperature	°C	Read
Zone 8 Flow Setpoint	°C	Read
Zone 8 Room Setpoint	°C	Read
Zone 8 Outside Temperature	°C	Read
Zone 8 Room Temperature	°C	Read
Zone 8 Room Temperature Measured		Read and write
Zone 8 DHW Tank Temperature Bottom	°C	Read
Zone 8 DHW Tank Temperature Top	°C	Read
Zone 8 Heat Demand Active		Read
Zone 8 Current Activity		Read
Zone 8 Current Mode		Read
Zone 8 Heating Mode		Read
Zone 8 Pump Running		Read
Zone 8 Mixing Valve Closing		Read
Zone 8 Mixing Valve Opening		Read
Zone 8 Pool Secondary Pump		Read
Zone 8 Electric Backup Output		Read
Zone 8 Pump Hours	h	Read
Zone 8 Pump Starts		Read
Zone 8 Type		Read
Zone 8 Function		Read
Zone 8 Short Name		Read
Zone 8 Board Device Type		Read
Zone 8 Board Instance		Read
Zone 8 Fixed Flow Setpoint	°C	Read and write
Zone 8 Mode		Read and write
Zone 8 Room Activity Setpoint 1	°C	Read and write
Zone 8 Room Activity Setpoint 2	°C	Read and write
Zone 8 Room Activity Setpoint 3	°C	Read and write
Zone 8 Room Activity Setpoint 4	°C	Read and write
Zone 8 Room Activity Setpoint 5	°C	Read and write
Zone 8 Room Reduced Setpoint	°C	Read and write
Zone 8 Room Cooling Setpoint 1	°C	Read and write
Zone 8 Room Cooling Setpoint 2	°C	Read and write
Zone 8 Room Cooling Setpoint 3	°C	Read and write
Zone 8 Room Cooling Setpoint 4	°C	Read and write
Zone 8 Room Cooling Setpoint 5	°C	Read and write
Zone 8 Room Cooling Reduced Setpoint	°C	Read and write
Zone 8 Room Holiday Setpoint	°C	Read and write
Zone 8 Room Temporary Setpoint	°C	Read and write
Zone 8 Room Manual Setpoint	°C	Read and write
Zone 8 DHW Comfort Setpoint	°C	Read and write
Zone 8 DHW Reduced Setpoint	°C	Read and write
Zone 8 DHW Holiday Setpoint	°C	Read and write
Zone 8 DHW Anti Legionella Setpoint	°C	Read and write
Zone 8 Swimming Pool Setpoint	°C	Read and write
Zone 8 Process Heat Setpoint	°C	Read and write
Zone 8 Heating Control Strategy		Read and write
Zone 8 Max Flow Setpoint	°C	Read and write
Zone 8 Cooling Flow Setpoint	°C	Read and write
Zone 8 Heating Curve Slope		Read and write
Zone 8 Heating Curve Footpoint Comfort	°C	Read and write
Zone 8 Heating Curve Footpoint Reduced	°C	Read and write
Zone 8 Max Preheat Time		Read and write
Zone 8 Mixing Valve Shift		Read and write
Zone 8 Mixing Valve Bandwidth		Read and write
Zone 8 DHW Hysteresis		Read and write
Zone 8 DHW Calorifier Offset		Read and write
Zone 8 DHW Calorifier Setpoint Raise		Read and write
Zone 8 Process Heat Hysteresis On		Read and write
Zone 8 Process Heat Hysteresis Off		Read and write
Zone 8 Process Heat Setpoint Raise		Read and write
Zone 8 DHW Start Hysteresis		Read and write
Zone 8 Pump Post Run		Read and write
Zone 8 Selected Time Program		Read and write
Zone 8 Program 1 Monday		Read and write
Zone 8 Program 1 Tuesday		Read and write
Zone 8 Program 1 Wednesday		Read and write
Zone 8 Program 1 Thursday		Read and write
Zone 8 Program 1 Friday		Read and write
Zone 8 Program 1 Saturday		Read and write
Zone 8 Program 1 Sunday		Read and write
Zone 8 Program 2 Monday		Read and write
Zone 8 Program 2 Tuesday		Read and write
Zone 8 Program 2 Wednesday		Read and write
Zone 8 Program 2 Thursday		Read and write
Zone 8 Program 2 Friday		Read and write
Zone 8 Program 2 Saturday		Read and write
Zone 8 Program 2 Sunday		Read and write
Zone 8 Program 3 Monday		Read and write
Zone 8 Program 3 Tuesday		Read and write
Zone 8 Program 3 Wednesday		Read and write
Zone 8 Program 3 Thursday		Read and write
Zone 8 Program 3 Friday		Read and write
Zone 8 Program 3 Saturday		Read and write
Zone 8 Program 3 Sunday		Read and write
Zone 8 Program 4 Monday		Read and write
Zone 8 Program 4 Tuesday		Read and write
Zone 8 Program 4 Wednesday		Read and write
Zone 8 Program 4 Thursday		Read and write
Zone 8 Program 4 Friday		Read and write
Zone 8 Program 4 Saturday		Read and write
Zone 8 Program 4 Sunday		Read and write
Zone 8 Holiday Start		Read and write
Zone 8 Holiday End		Read and write
Zone 8 Mode Change End		Read and write
Zone 9 Flow Temperature	°C	Read
Zone 9 Flow Setpoint	°C	Read
Zone 9 Room Setpoint	°C	Read
Zone 9 Outside Temperature	°C	Read
Zone 9 Room Temperature	°C	Read
Zone 9 Room Temperature Measured		Read and write
Zone 9 DHW Tank Temperature Bottom	°C	Read
Zone 9 DHW Tank Temperature Top	°C	Read
Zone 9 Heat Demand Active		Read
Zone 9 Current Activity		Read
Zone 9 Current Mode		Read
Zone 9 Heating Mode		Read
Zone 9 Pump Running		Read
Zone 9 Mixing Valve Closing		Read
Zone 9 Mixing Valve Opening		Read
Zone 9 Pool Secondary Pump		Read
Zone 9 Electric Backup Output		Read
Zone 9 Pump Hours	h	Read
Zone 9 Pump Starts		Read
Zone 9 Type		Read
Zone 9 Function		Read
Zone 9 Short Name		Read
Zone 9 Board Device Type		Read
Zone 9 Board Instance		Read
Zone 9 Fixed Flow Setpoint	°C	Read and write
Zone 9 Mode		Read and write
Zone 9 Room Activity Setpoint 1	°C	Read and write
Zone 9 Room Activity Setpoint 2	°C	Read and write
Zone 9 Room Activity Setpoint 3	°C	Read and write
Zone 9 Room Activity Setpoint 4	°C	Read and write
Zone 9 Room Activity Setpoint 5	°C	Read and write
Zone 9 Room Reduced Setpoint	°C	Read and write
Zone 9 Room Cooling Setpoint 1	°C	Read and write
Zone 9 Room Cooling Setpoint 2	°C	Read and write
Zone 9 Room Cooling Setpoint 3	°C	Read and write
Zone 9 Room Cooling Setpoint 4	°C	Read and write
Zone 9 Room Cooling Setpoint 5	°C	Read and write
Zone 9 Room Cooling Reduced Setpoint	°C	Read and write
Zone 9 Room Holiday Setpoint	°C	Read and write
Zone 9 Room Temporary Setpoint	°C	Read and write
Zone 9 Room Manual Setpoint	°C	Read and write
Zone 9 DHW Comfort Setpoint	°C	Read and write
Zone 9 DHW Reduced Setpoint	°C	Read and write
Zone 9 DHW Holiday Setpoint	°C	Read and write
Zone 9 DHW Anti Legionella Setpoint	°C	Read and write
Zone 9 Swimming Pool Setpoint	°C	Read and write
Zone 9 Process Heat Setpoint	°C	Read and write
Zone 9 Heating Control Strategy		Read and write
Zone 9 Max Flow Setpoint	°C	Read and write
Zone 9 Cooling Flow Setpoint	°C	Read and write
Zone 9 Heating Curve Slope		Read and write
Zone 9 Heating Curve Footpoint Comfort	°C	Read and write
Zone 9 Heating Curve Footpoint Reduced	°C	Read and write
Zone 9 Max Preheat Time		Read and write
Zone 9 Mixing Valve Shift		Read and write
Zone 9 Mixing Valve Bandwidth		Read and write
Zone 9 DHW Hysteresis		Read and write
Zone 9 DHW Calorifier Offset		Read and write
Zone 9 DHW Calorifier Setpoint Raise		Read and write
Zone 9 Process Heat Hysteresis On		Read and write
Zone 9 Process Heat Hysteresis Off		Read and write
Zone 9 Process Heat Setpoint Raise		Read and write
Zone 9 DHW Start Hysteresis		Read and write
Zone 9 Pump Post Run		Read and write
Zone 9 Selected Time Program		Read and write
Zone 9 Program 1 Monday		Read and write
Zone 9 Program 1 Tuesday		Read and write
Zone 9 Program 1 Wednesday		Read and write
Zone 9 Program 1 Thursday		Read and write
Zone 9 Program 1 Friday		Read and write
Zone 9 Program 1 Saturday		Read and write
Zone 9 Program 1 Sunday		Read and write
Zone 9 Program 2 Monday		Read and write
Zone 9 Program 2 Tuesday		Read and write
Zone 9 Program 2 Wednesday		Read and write
Zone 9 Program 2 Thursday		Read and write
Zone 9 Program 2 Friday		Read and write
Zone 9 Program 2 Saturday		Read and write
Zone 9 Program 2 Sunday		Read and write
Zone 9 Program 3 Monday		Read and write
Zone 9 Program 3 Tuesday		Read and write
Zone 9 Program 3 Wednesday		Read and write
Zone 9 Program 3 Thursday		Read and write
Zone 9 Program 3 Friday		Read and write
Zone 9 Program 3 Saturday		Read and write
Zone 9 Program 3 Sunday		Read and write
Zone 9 Program 4 Monday		Read and write
Zone 9 Program 4 Tuesday		Read and write
Zone 9 Program 4 Wednesday		Read and write
Zone 9 Program 4 Thursday		Read and write
Zone 9 Program 4 Friday		Read and write
Zone 9 Program 4 Saturday		Read and write
Zone 9 Program 4 Sunday		Read and write
Zone 9 Holiday Start		Read and write
Zone 9 Holiday End		Read and write
Zone 9 Mode Change End		Read and write
Zone 10 Flow Temperature	°C	Read
Zone 10 Flow Setpoint	°C	Read
Zone 10 Room Setpoint	°C	Read
Zone 10 Outside Temperature	°C	Read
Zone 10 Room Temperature	°C	Read
Zone 10 Room Temperature Measured		Read and write
Zone 10 DHW Tank Temperature Bottom	°C	Read
Zone 10 DHW Tank Temperature Top	°C	Read
Zone 10 Heat Demand Active		Read
Zone 10 Current Activity		Read
Zone 10 Current Mode		Read
Zone 10 Heating Mode		Read
Zone 10 Pump Running		Read
Zone 10 Mixing Valve Closing		Read
Zone 10 Mixing Valve Opening		Read
Zone 10 Pool Secondary Pump		Read
Zone 10 Electric Backup Output		Read
Zone 10 Pump Hours	h	Read
Zone 10 Pump Starts		Read
Zone 10 Type		Read
Zone 10 Function		Read
Zone 10 Short Name		Read
Zone 10 Board Device Type		Read
Zone 10 Board Instance		Read
Zone 10 Fixed Flow Setpoint	°C	Read and write
Zone 10 Mode		Read and write
Zone 10 Room Activity Setpoint 1	°C	Read and write
Zone 10 Room Activity Setpoint 2	°C	Read and write
Zone 10 Room Activity Setpoint 3	°C	Read and write
Zone 10 Room Activity Setpoint 4	°C	Read and write
Zone 10 Room Activity Setpoint 5	°C	Read and write
Zone 10 Room Reduced Setpoint	°C	Read and write
Zone 10 Room Cooling Setpoint 1	°C	Read and write
Zone 10 Room Cooling Setpoint 2	°C	Read and write
Zone 10 Room Cooling Setpoint 3	°C	Read and write
Zone 10 Room Cooling Setpoint 4	°C	Read and write
Zone 10 Room Cooling Setpoint 5	°C	Read and write
Zone 10 Room Cooling Reduced Setpoint	°C	Read and write
Zone 10 Room Holiday Setpoint	°C	Read and write
Zone 10 Room Temporary Setpoint	°C	Read and write
Zone 10 Room Manual Setpoint	°C	Read and write
Zone 10 DHW Comfort Setpoint	°C	Read and write
Zone 10 DHW Reduced Setpoint	°C	Read and write
Zone 10 DHW Holiday Setpoint	°C	Read and write
Zone 10 DHW Anti Legionella Setpoint	°C	Read and write
Zone 10 Swimming Pool Setpoint	°C	Read and write
Zone 10 Process Heat Setpoint	°C	Read and write
Zone 10 Heating Control Strategy		Read and write
Zone 10 Max Flow Setpoint	°C	Read and write
Zone 10 Cooling Flow Setpoint	°C	Read and write
Zone 10 Heating Curve Slope		Read and write
Zone 10 Heating Curve Footpoint Comfort	°C	Read and write
Zone 10 Heating Curve Footpoint Reduced	°C	Read and write
Zone 10 Max Preheat Time		Read and write
Zone 10 Mixing Valve Shift		Read and write
Zone 10 Mixing Valve Bandwidth		Read and write
Zone 10 DHW Hysteresis		Read and write
Zone 10 DHW Calorifier Offset		Read and write
Zone 10 DHW Calorifier Setpoint Raise		Read and write
Zone 10 Process Heat Hysteresis On		Read and write
Zone 10 Process Heat Hysteresis Off		Read and write
Zone 10 Process Heat Setpoint Raise		Read and write
Zone 10 DHW Start Hysteresis		Read and write
Zone 10 Pump Post Run		Read and write
Zone 10 Selected Time Program		Read and write
Zone 10 Program 1 Monday		Read and write
Zone 10 Program 1 Tuesday		Read and write
Zone 10 Program 1 Wednesday		Read and write
Zone 10 Program 1 Thursday		Read and write
Zone 10 Program 1 Friday		Read and write
Zone 10 Program 1 Saturday		Read and write
Zone 10 Program 1 Sunday		Read and write
Zone 10 Program 2 Monday		Read and write
Zone 10 Program 2 Tuesday		Read and write
Zone 10 Program 2 Wednesday		Read and write
Zone 10 Program 2 Thursday		Read and write
Zone 10 Program 2 Friday		Read and write
Zone 10 Program 2 Saturday		Read and write
Zone 10 Program 2 Sunday		Read and write
Zone 10 Program 3 Monday		Read and write
Zone 10 Program 3 Tuesday		Read and write
Zone 10 Program 3 Wednesday		Read and write
Zone 10 Program 3 Thursday		Read and write
Zone 10 Program 3 Friday		Read and write
Zone 10 Program 3 Saturday		Read and write
Zone 10 Program 3 Sunday		Read and write
Zone 10 Program 4 Monday		Read and write
Zone 10 Program 4 Tuesday		Read and write
Zone 10 Program 4 Wednesday		Read and write
Zone 10 Program 4 Thursday		Read and write
Zone 10 Program 4 Friday		Read and write
Zone 10 Program 4 Saturday		Read and write
Zone 10 Program 4 Sunday		Read and write
Zone 10 Holiday Start		Read and write
Zone 10 Holiday End		Read and write
Zone 10 Mode Change End		Read and write
Zone 11 Flow Temperature	°C	Read
Zone 11 Flow Setpoint	°C	Read
Zone 11 Room Setpoint	°C	Read
Zone 11 Outside Temperature	°C	Read
Zone 11 Room Temperature	°C	Read
Zone 11 Room Temperature Measured		Read and write
Zone 11 DHW Tank Temperature Bottom	°C	Read
Zone 11 DHW Tank Temperature Top	°C	Read
Zone 11 Heat Demand Active		Read
Zone 11 Current Activity		Read
Zone 11 Current Mode		Read
Zone 11 Heating Mode		Read
Zone 11 Pump Running		Read
Zone 11 Mixing Valve Closing		Read
Zone 11 Mixing Valve Opening		Read
Zone 11 Pool Secondary Pump		Read
Zone 11 Electric Backup Output		Read
Zone 11 Pump Hours	h	Read
Zone 11 Pump Starts		Read
Zone 11 Type		Read
Zone 11 Function		Read
Zone 11 Short Name		Read
Zone 11 Board Device Type		Read
Zone 11 Board Instance		Read
Zone 11 Fixed Flow Setpoint	°C	Read and write
Zone 11 Mode		Read and write
Zone 11 Room Activity Setpoint 1	°C	Read and write
Zone 11 Room Activity Setpoint 2	°C	Read and write
Zone 11 Room Activity Setpoint 3	°C	Read and write
Zone 11 Room Activity Setpoint 4	°C	Read and write
Zone 11 Room Activity Setpoint 5	°C	Read and write
Zone 11 Room Reduced Setpoint	°C	Read and write
Zone 11 Room Cooling Setpoint 1	°C	Read and write
Zone 11 Room Cooling Setpoint 2	°C	Read and write
Zone 11 Room Cooling Setpoint 3	°C	Read and write
Zone 11 Room Cooling Setpoint 4	°C	Read and write
Zone 11 Room Cooling Setpoint 5	°C	Read and write
Zone 11 Room Cooling Reduced Setpoint	°C	Read and write
Zone 11 Room Holiday Setpoint	°C	Read and write
Zone 11 Room Temporary Setpoint	°C	Read and write
Zone 11 Room Manual Setpoint	°C	Read and write
Zone 11 DHW Comfort Setpoint	°C	Read and write
Zone 11 DHW Reduced Setpoint	°C	Read and write
Zone 11 DHW Holiday Setpoint	°C	Read and write
Zone 11 DHW Anti Legionella Setpoint	°C	Read and write
Zone 11 Swimming Pool Setpoint	°C	Read and write
Zone 11 Process Heat Setpoint	°C	Read and write
Zone 11 Heating Control Strategy		Read and write
Zone 11 Max Flow Setpoint	°C	Read and write
Zone 11 Cooling Flow Setpoint	°C	Read and write
Zone 11 Heating Curve Slope		Read and write
Zone 11 Heating Curve Footpoint Comfort	°C	Read and write
Zone 11 Heating Curve Footpoint Reduced	°C	Read and write
Zone 11 Max Preheat Time		Read and write
Zone 11 Mixing Valve Shift		Read and write
Zone 11 Mixing Valve Bandwidth		Read and write
Zone 11 DHW Hysteresis		Read and write
Zone 11 DHW Calorifier Offset		Read and write
Zone 11 DHW Calorifier Setpoint Raise		Read and write
Zone 11 Process Heat Hysteresis On		Read and write
Zone 11 Process Heat Hysteresis Off		Read and write
Zone 11 Process Heat Setpoint Raise		Read and write
Zone 11 DHW Start Hysteresis		Read and write
Zone 11 Pump Post Run		Read and write
Zone 11 Selected Time Program		Read and write
Zone 11 Program 1 Monday		Read and write
Zone 11 Program 1 Tuesday		Read and write
Zone 11 Program 1 Wednesday		Read and write
Zone 11 Program 1 Thursday		Read and write
Zone 11 Program 1 Friday		Read and write
Zone 11 Program 1 Saturday		Read and write
Zone 11 Program 1 Sunday		Read and write
Zone 11 Program 2 Monday		Read and write
Zone 11 Program 2 Tuesday		Read and write
Zone 11 Program 2 Wednesday		Read and write
Zone 11 Program 2 Thursday		Read and write
Zone 11 Program 2 Friday		Read and write
Zone 11 Program 2 Saturday		Read and write
Zone 11 Program 2 Sunday		Read and write
Zone 11 Program 3 Monday		Read and write
Zone 11 Program 3 Tuesday		Read and write
Zone 11 Program 3 Wednesday		Read and write
Zone 11 Program 3 Thursday		Read and write
Zone 11 Program 3 Friday		Read and write
Zone 11 Program 3 Saturday		Read and write
Zone 11 Program 3 Sunday		Read and write
Zone 11 Program 4 Monday		Read and write
Zone 11 Program 4 Tuesday		Read and write
Zone 11 Program 4 Wednesday		Read and write
Zone 11 Program 4 Thursday		Read and write
Zone 11 Program 4 Friday		Read and write
Zone 11 Program 4 Saturday		Read and write
Zone 11 Program 4 Sunday		Read and write
Zone 11 Holiday Start		Read and write
Zone 11 Holiday End		Read and write
Zone 11 Mode Change End		Read and write
Zone 12 Flow Temperature	°C	Read
Zone 12 Flow Setpoint	°C	Read
Zone 12 Room Setpoint	°C	Read
Zone 12 Outside Temperature	°C	Read
Zone 12 Room Temperature	°C	Read
Zone 12 Room Temperature Measured		Read and write
Zone 12 DHW Tank Temperature Bottom	°C	Read
Zone 12 DHW Tank Temperature Top	°C	Read
Zone 12 Heat Demand Active		Read
Zone 12 Current Activity		Read
Zone 12 Current Mode		Read
Zone 12 Heating Mode		Read
Zone 12 Pump Running		Read
Zone 12 Mixing Valve Closing		Read
Zone 12 Mixing Valve Opening		Read
Zone 12 Pool Secondary Pump		Read
Zone 12 Electric Backup Output		Read
Zone 12 Pump Hours	h	Read
Zone 12 Pump Starts		Read
Zone 12 Type		Read
Zone 12 Function		Read
Zone 12 Short Name		Read
Zone 12 Board Device Type		Read
Zone 12 Board Instance		Read
Zone 12 Fixed Flow Setpoint	°C	Read and write
Zone 12 Mode		Read and write
Zone 12 Room Activity Setpoint 1	°C	Read and write
Zone 12 Room Activity Setpoint 2	°C	Read and write
Zone 12 Room Activity Setpoint 3	°C	Read and write
Zone 12 Room Activity Setpoint 4	°C	Read and write
Zone 12 Room Activity Setpoint 5	°C	Read and write
Zone 12 Room Reduced Setpoint	°C	Read and write
Zone 12 Room Cooling Setpoint 1	°C	Read and write
Zone 12 Room Cooling Setpoint 2	°C	Read and write
Zone 12 Room Cooling Setpoint 3	°C	Read and write
Zone 12 Room Cooling Setpoint 4	°C	Read and write
Zone 12 Room Cooling Setpoint 5	°C	Read and write
Zone 12 Room Cooling Reduced Setpoint	°C	Read and write
Zone 12 Room Holiday Setpoint	°C	Read and write
Zone 12 Room Temporary Setpoint	°C	Read and write
Zone 12 Room Manual Setpoint	°C	Read and write
Zone 12 DHW Comfort Setpoint	°C	Read and write
Zone 12 DHW Reduced Setpoint	°C	Read and write
Zone 12 DHW Holiday Setpoint	°C	Read and write
Zone 12 DHW Anti Legionella Setpoint	°C	Read and write
Zone 12 Swimming Pool Setpoint	°C	Read and write
Zone 12 Process Heat Setpoint	°C	Read and write
Zone 12 Heating Control Strategy		Read and write
Zone 12 Max Flow Setpoint	°C	Read and write
Zone 12 Cooling Flow Setpoint	°C	Read and write
Zone 12 Heating Curve Slope		Read and write
Zone 12 Heating Curve Footpoint Comfort	°C	Read and write
Zone 12 Heating Curve Footpoint Reduced	°C	Read and write
Zone 12 Max Preheat Time		Read and write
Zone 12 Mixing Valve Shift		Read and write
Zone 12 Mixing Valve Bandwidth		Read and write
Zone 12 DHW Hysteresis		Read and write
Zone 12 DHW Calorifier Offset		Read and write
Zone 12 DHW Calorifier Setpoint Raise		Read and write
Zone 12 Process Heat Hysteresis On		Read and write
Zone 12 Process Heat Hysteresis Off		Read and write
Zone 12 Process Heat Setpoint Raise		Read and write
Zone 12 DHW Start Hysteresis		Read and write
Zone 12 Pump Post Run		Read and write
Zone 12 Selected Time Program		Read and write
Zone 12 Program 1 Monday		Read and write
Zone 12 Program 1 Tuesday		Read and write
Zone 12 Program 1 Wednesday		Read and write
Zone 12 Program 1 Thursday		Read and write
Zone 12 Program 1 Friday		Read and write
Zone 12 Program 1 Saturday		Read and write
Zone 12 Program 1 Sunday		Read and write
Zone 12 Program 2 Monday		Read and write
Zone 12 Program 2 Tuesday		Read and write
Zone 12 Program 2 Wednesday		Read and write
Zone 12 Program 2 Thursday		Read and write
Zone 12 Program 2 Friday		Read and write
Zone 12 Program 2 Saturday		Read and write
Zone 12 Program 2 Sunday		Read and write
Zone 12 Program 3 Monday		Read and write
Zone 12 Program 3 Tuesday		Read and write
Zone 12 Program 3 Wednesday		Read and write
Zone 12 Program 3 Thursday		Read and write
Zone 12 Program 3 Friday		Read and write
Zone 12 Program 3 Saturday		Read and write
Zone 12 Program 3 Sunday		Read and write
Zone 12 Program 4 Monday		Read and write
Zone 12 Program 4 Tuesday		Read and write
Zone 12 Program 4 Wednesday		Read and write
Zone 12 Program 4 Thursday		Read and write
Zone 12 Program 4 Friday		Read and write
Zone 12 Program 4 Saturday		Read and write
Zone 12 Program 4 Sunday		Read and write
Zone 12 Holiday Start		Read and write
Zone 12 Holiday End		Read and write
Zone 12 Mode Change End		Read and write

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Use cases

Show flow, return and outdoor temperature and water pressure of a Remeha boiler on one ModbusCloud dashboard.
Get an email when the appliance error code changes or the water pressure drops below a threshold you set.
Track burner starts, burner hours and energy for heating and hot water in the 365-day history.
Change the room or DHW setpoint of a zone remotely from the portal.
Compare flow temperature and status of each appliance in a cascade to see which one is running.
Check the service notification and hours since the last service before a maintenance visit.

Installation

Mount the GTW-08 on the L-Bus of the appliance as described in the Remeha installation manual.
Set the Modbus address with the rotary dial (0 gives 100) and baud rate and parity with DIP switches 1 to 4.
Connect RS485 A and B of the GTW-08 to the RS485 port of the ModbusCloud Gateway, with termination at both ends of the bus.
In ModbusCloud, add a Modbus device with the same address, speed and parity, and import this template.
Check that Flow Temperature and Water Pressure show plausible values and that Number Of Zones matches the installation.

Things to watch for

The GTW-08 does not answer. What should I check?

Check the address on the rotary dial (position 0 is address 100, not 0), the baud rate and parity on DIP switches 1 to 4, and swap A and B. Add a termination resistor at both ends of the bus. A blinking orange LED on the GTW-08 means there is a problem.

Why do zone registers return nothing or an error?

Not every zone exists on every appliance. Read Number Of Zones and the zone Type and Function first; a zone with type 0 is not present. Each zone uses the same layout 512 registers further. If the appliance was changed after installing the GTW-08, write 90 to Reset Discovery Table so it scans the boards again.

Why are some temperatures 100 times too high or too low?

Water and outdoor temperatures use 0.01 °C, room temperatures 0.1 °C. Some parameters such as hystereses and offsets have no stated resolution and are shown unscaled. Compare one value with the display of the appliance and adjust the scale in the portal if needed.

How do I control the boiler through Modbus?

Write Algorithm Type first: 0 power and temperature, 1 power, 2 temperature. At 3 the appliance ignores the heat demand registers. Then write Heat Demand Type (7 heating, 8 cooling) and the power or temperature setpoint. Writing registers is off per Gateway until it is enabled on request; write only setpoints you understand.

Can several appliances share one GTW-08?

One GTW-08 serves one appliance and its L-Bus boards. In a cascade the master reports the cascade registers and the flow temperature and status of each member. Several GTW-08 on one RS485 bus each need their own address.

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