Dimplex WPM Touch

Name: Dimplex WPM Touch
Brand: Dimplex
SKU: 87e68415-011b-4c87-a7f6-0242d00c9b1f

Heat pump manager for Dimplex heat pumps: temperatures, power, status and setpoints over Modbus TCP.

The Dimplex WPM Touch is the heat pump manager of Dimplex heat pumps that controls heating, cooling, hot water and pool heating in homes and small buildings. This Modbus TCP template reads temperatures, power, heat quantities, running hours and status codes, and lets you set the operating mode, SG Ready state and heating and hot water setpoints from ModbusCloud.

Protocol: Modbus TCP
Connection: Ethernet, Modbus TCP
Registers: 140, read and write

Brand: Dimplex
Key readings: Outdoor temperature · Flow and return temperature · Hot water temperature · Electrical power · Heat output · Operating status · Fault code · Running hours
Available commands: Operating mode · SG Ready state · Hot water setpoint · Heating curve end point · Pool setpoint · External lock
Compatible models: WPM Touch with NWPM Touch extension (WPM software L and M) · Dimplex heat pumps with WPM Touch heat pump manager
Last updated: 11 October 2026

Registers (140)

133 read, 53 write

Name	Unit	Access
Outdoor Temperature	°C	Read
Return Temperature	°C	Read
Return Temperature Setpoint	°C	Read
Hot Water Temperature	°C	Read
Hot Water Temperature Setpoint	°C	Read
Flow Temperature	°C	Read
Heat Source Inlet Temperature	°C	Read
Heat Source Outlet Temperature	°C	Read
Heating Circuit 2 Setpoint	°C	Read
Heating Circuit 2 Temperature	°C	Read
Heating Circuit 3 Setpoint	°C	Read
Heating Circuit 3 Temperature	°C	Read
Room Temperature 1	°C	Read and write
Room Temperature 2	°C	Read
Room Humidity 1	%RH	Read and write
Room Humidity 2	%RH	Read
Passive Cooling Flow Temperature	°C	Read
Passive Cooling Return Temperature	°C	Read
Primary Circuit Return Temperature	°C	Read
Solar Tank Temperature	°C	Read
Ventilation Outdoor Air Temperature	°C	Read
Ventilation Supply Air Temperature	°C	Read
Ventilation Extract Air Temperature	°C	Read
Ventilation Exhaust Air Temperature	°C	Read
Supply Fan Speed	rpm	Read
Extract Fan Speed	rpm	Read
Heat Output	W	Read
Electrical Power	W	Read
Heat Quantity Heating Digits 1-4	kWh	Read
Heat Quantity Heating Digits 5-8		Read
Heat Quantity Heating Digits 9-12		Read
Heat Quantity Hot Water Digits 1-4	kWh	Read
Heat Quantity Hot Water Digits 5-8		Read
Heat Quantity Hot Water Digits 9-12		Read
Heat Quantity Pool Digits 1-4	kWh	Read
Heat Quantity Pool Digits 5-8		Read
Heat Quantity Pool Digits 9-12		Read
Environmental Energy Digits 1-4	kWh	Read
Environmental Energy Digits 5-8		Read
Environmental Energy Digits 9-12		Read
Status Message		Read
Lock Message		Read
Fault Message		Read
Sensor Fault		Read
Smart Grid Input 1		Read
Smart Grid Input 2		Read
Utility Lock Input		Read
External Lock Input		Read
Compressor 1		Read
Compressor 2		Read
Primary Pump Or Fan		Read
Second Heat Generator		Read
Heating Pump M13		Read
Hot Water Pump		Read
Mixer M21 Open		Read
Mixer M21 Close		Read
Auxiliary Circulation Pump		Read
Flange Heater		Read
Heating Pump M15		Read
Mixer M22 Open		Read
Mixer M22 Close		Read
Pool Pump		Read
Collective Fault Output		Read
Heating Pump M14		Read
Cooling Pump		Read
Heating Pump M20		Read
Room Thermostat Heat Cool Switch		Read
Primary Pump Cooling		Read
Solar Pump		Read
Control Valve State		Read
Compressor 1 Hours	h	Read
Compressor 2 Hours	h	Read
Primary Pump Hours	h	Read
Second Heat Generator Hours	h	Read
Heating Pump Hours	h	Read
Hot Water Pump Hours	h	Read
Flange Heater Hours	h	Read
Pool Pump Hours	h	Read
Auxiliary Circulation Pump Hours	h	Read
Operating Mode		Read and write
Party Hours	h	Read and write
Holiday Days	d	Read and write
Ventilation Level		Read and write
Boost Ventilation Time		Read and write
Smart Grid Mode		Read and write
PV Surplus	W	Read and write
External Lock		Read and write
Heartbeat In		Write
Heartbeat Out		Read
External Outdoor Temperature	°C	Read and write
Room Address Select		Read and write
BMS Room Setpoint	°C	Read and write
BMS Room Release		Read and write
Circuit 1 Parallel Shift		Read and write
Circuit 1 Room Temperature	°C	Read and write
Circuit 1 Fixed Setpoint	°C	Read and write
Circuit 1 Heating Curve End Point	°C	Read and write
Circuit 1 Hysteresis	K	Read and write
Circuit 1 Dynamic Cooling Setpoint	°C	Read and write
Circuit 1 Cooling Setpoint At 35C	°C	Read and write
Circuit 2 3 Select		Read and write
Circuit 2 3 Select Address 209		Read and write
Circuit 2 3 Heating Curve End Point	°C	Read and write
Circuit 2 3 Fixed Setpoint	°C	Read and write
Circuit 2 3 Parallel Shift		Read and write
Circuit 2 3 Mixer Run Time	min	Read and write
Circuit 2 3 Mixer Hysteresis	K	Read and write
Circuit 2 3 Maximum Temperature	°C	Read and write
Circuit 2 3 Cooling Room Setpoint		Read and write
Hot Water Hysteresis	K	Read and write
Hot Water Setpoint	°C	Read and write
Hot Water Minimum Setpoint	°C	Read and write
Hot Water Maximum Setpoint	°C	Read and write
Pool Hysteresis	K	Read and write
Pool Setpoint	°C	Read and write
Second Heat Generator Mixer Hysteresis	K	Read and write
Bivalent Parallel Limit Temperature	°C	Read and write
Second Heat Generator Mixer Run Time	min	Read and write
Memory Entry Select		Read and write
Memory Entry Hour	h	Read
Memory Entry Minute	min	Read
Memory Entry Month		Read
Memory Entry Day	d	Read
Memory Entry Year		Read
Memory Entry Code		Read
Clock Hour	h	Read and write
Set Hour		Write
Clock Minute	min	Read and write
Set Minute		Write
Clock Month		Read and write
Set Month		Write
Clock Weekday		Read and write
Set Weekday		Write
Clock Day	d	Read and write
Set Day		Write
Clock Year		Read and write
Set Year		Write
Software Version Letter		Read
Software Number		Read
Software Index		Read

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Use cases

Show flow, return, hot water and outdoor temperatures of every heat pump on one dashboard.
Send an alert when the fault code is not 0 or the collective fault output switches on.
Compare electrical power and heat output over the year in the 365-day history.
Switch the SG Ready state to boost from an automation when electricity is cheap.
Change the hot water setpoint or operating mode on site without a visit.
Track compressor and pump running hours for maintenance planning.

Installation

Fit the NWPM Touch extension in the Serial Card/BMS Card slot of the heat pump manager with the power off.
Connect the extension to the network of the ModbusCloud Gateway with a Cat 5e cable and note its IP address from the Analytics menu.
Open the NWPM Touch web interface over https, enable network services under Settings and restart the extension.
In ModbusCloud, add a Modbus TCP device with the IP address, port 502 and unit ID 1, and import this template.
Check that the outdoor temperature and the software version show plausible values.

Things to watch for

The heat pump manager does not answer on port 502.

Modbus TCP only works once network services are enabled in the NWPM Touch web interface and the extension has restarted. Older WPM software has no Modbus TCP setting; the extension updates itself within 24 hours when it is online. Also check that the IP address has not changed and that the extension is on the same network as the Gateway.

Some temperatures show 0 or an impossible value.

Not every sensor exists on every heat pump. Heat source inlet, room, solar, pool and ventilation values only make sense when that sensor or unit is fitted. The Sensor Fault code tells you which sensor the manager misses.

How do I write settings for heating circuit 2 or 3?

First write 2 or 3 to Circuit 2 3 Select to choose the circuit, then write the curve, setpoint or mixer settings. If the selection does not take effect, try the selection register at address 209. Write only values inside the listed range; the manager rejects or limits others.

Why are the heat quantities split over three values?

Each heat quantity is stored as three values of four digits. The total in kWh is the third value times 100000000 plus the second value times 10000 plus the first value. Heat quantities only appear on heat pumps with an internal or external heat meter.

What should I watch when writing the operating mode or SG Ready state?

These change how the heat pump runs for heating, hot water and pool. Writing 0 to the SG Ready or external lock register hands control back to the hardware inputs. Agree changes with the owner, and remember that writing registers from ModbusCloud is switched on per gateway on request.

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