Why do energy or flow readings show unexpected values?

Check the unit selection registers on the Energy Valve. The device supports both metric and imperial units, and the template expects a specific setting. Also verify glycol concentration, as a glycol mixture affects energy calculations.

Which Modbus TCP port and unit ID should I use?

The default Modbus TCP port is 502. The unit ID is configurable on the Energy Valve via the Belimo Assistant App or the device menu. Make sure the unit ID in ModbusCloud matches the valve setting.

Some registers return zero or do not update. What should I check?

The register map uses mixed data types including uint16, uint32, int16, and int32. Ensure the template is correctly matched to your valve variant (MID, BAC, or KBAC). Also confirm the valve firmware is up to date via the Belimo Assistant App.

Can I connect multiple Energy Valves to one ModbusCloud gateway?

Yes. Each valve needs a unique IP address on the network. Add a separate device connection in ModbusCloud for each valve, using the same template but different IP addresses and unit IDs.

Free Modbus template: Belimo Energy Valve V4 Modbus TCP

Name: Belimo Energy Valve V4 Modbus TCP
Brand: Belimo
SKU: 48d844b7-cb1e-4f60-8d68-39a10464af66

Template for the Belimo Energy Valve V4 via Modbus TCP. Reads volumetric flow, thermal power, heating and cooling energy totals, temperatures, delta-T, and differential pressure. Also provides setpoint control for valve position, flow limits, and delta-T.

Registers (98)

62 read / 36 write

Name	Address	Function	Type	Unit	Access
Actuator type	3	FC03	uint16		R
Relative position	4	FC03	uint16	%	R
Absolute position	5	FC03	uint16	°C	R
Relative volumetric flow	6	FC03	uint16	%	R
Absolute volumetric flow in selected unit	9	FC03	uint32	l/h	R
Setpoint analog	11	FC03	uint16	%	R
Temperature 1 in degree Celsius	19	FC03	int16	°C	R
Temperature 1 in degree Fahrenheit	20	FC03	int16	°F	R
Temperature 2 in degree Celsius	21	FC03	int16	°C	R
Temperature 2 in degree Fahrenheit	22	FC03	int16	°F	R
DeltaT_K	23	FC03	uint16	K	R
DeltaT_F	24	FC03	uint16	°F	R
Glycol concentration	25	FC03	uint16	%	R
Relative power	26	FC03	uint16	%	R
Series Number 1st part	100	FC03	uint16		R
Series Number 2nd part	101	FC03	uint16		R
Series Number 4th part	102	FC03	uint16		R
Firmware version	103	FC03	uint16		R
Error state	157	FC03	uint32		R
DeltaT Manager Status	180	FC03	uint16		R
Absolute volumetric flow in liter per second	7	FC03	uint16	l/s	R
Absolute volumetric flow in gpm	8	FC03	uint16	gpm	R
Setpoint flow in selected unit	17	FC03	uint32	l/h	R
Absolute Power Cooling in selected unit	31	FC03	uint32	kW	R
Absolute Power Cooling in kW	27	FC03	uint32	kW	R
Absolute Power Cooling in kBtu per hour	29	FC03	uint32	kBtu/h	R
Energy Cooling in selected unit	69	FC03	uint32	kWh	R
Energy Cooling in kWh	65	FC03	uint32	kWh	R
Energy Cooling in kBtu	67	FC03	uint32	kBtu	R
Energy Heating in selected unit	75	FC03	uint32	kWh	R
Energy Heating in kWh	71	FC03	uint32	kWh	R
Energy Heating in kBtu	73	FC03	uint32	kBtu	R
Nominal volumetric flow in selected unit	112	FC03	uint32	l/h	R
Nominal volumetric flow in liter per second	110	FC03	uint16	l/s	R
Nominal volumetric flow in gpm	111	FC03	uint16	gpm	R
Nominal power in selected unit	163	FC03	uint32	kW	R
Nominal power in kW	159	FC03	uint32	kW	R
Nominal power in kBtu per hour	161	FC03	uint32	kBtu/h	R
Setpoint flow in liter per second	15	FC03	uint16	l/s	R
Setpoint flow in gpm	16	FC03	uint16	gpm	R
Absolute Power Heating in kW	33	FC03	uint32	kW	R
Absolute Power Heating in kBtu per hour	35	FC03	uint32	kBtu/h	R
Absolute Power Heating in selected unit	37	FC03	uint32	kW	R
Sensor Serial Number 1st Part	200	FC03	uint32		R
Sensor Serial Number 2nd Part	202	FC03	uint32		R
Sensor value 1	12	FC03	uint16		R
Sensor 1 value in degree Celcius	13	FC03	int16	°C	R
Sensor 1 value in degree Fahrenheit	14	FC03	int16	°F	R
Total volume in cubic meter	59	FC03	uint32	m³	R
Total volume in gallon	61	FC03	uint32	gal	R
Total volume in selected unit	63	FC03	uint32	m³	R
Bus termination	99	FC03	uint16		R
Absolute differential water pressure in selected unit	47	FC03	int32	bar	R
Relative water differential pressure	49	FC03	int32	%	R
Absolute differential water pressure in psi	51	FC03	int32	psi	R
Absolute differential water pressure in kPa	57	FC03	int32	kPa	R
Status of the differential water pressure sensor	181	FC03	uint16		R
Differential water pressure control status	182	FC03	uint16		R
Nominal differential water pressure in selected unit	184	FC03	uint32	bar	R
Nominal differential water pressure in psi	186	FC03	uint32	psi	R
Nominal differential water pressure in kPa	188	FC03	uint32	kPa	R
Malfunction and service information	104	FC03	uint16		R
Setpoint	0	FC06	uint16	%	W
Override control	1	FC06	uint16		W
Vmax in percent of Vnom	106	FC06	uint16	%	W
Pmax in percent of Pnom	165	FC06	uint16	%	W
Delta T Limitation	179	FC06	uint16		W
Setpoint DeltaT in K	39	FC06	uint16	K	W
Setpoint DeltaT in F	40	FC06	uint16	°F	W
Control Mode	116	FC06	uint16		W
Unit Selection Flow	147	FC06	uint16		W
Unit Selection Power	148	FC06	uint16		W
Unit Selection Energy	150	FC06	uint16		W
Setpoint Source	118	FC06	uint16		W
Absolute Vmax in liter per second	133	FC06	uint16	l/s	W
Absolute Vmax in gpm	134	FC06	uint16	gpm	W
Absolute Pmax in kW	166	FC16	uint32	kW	W
Absolute Pmax in kBtu per hour	168	FC16	uint32	kBtu/h	W
Vmin in percent of Vmax	105	FC06	uint16	%	W
Absolute Vmax in selected unit	135	FC16	uint32	l/h	W
Absolute Vmin in liter per second	129	FC06	uint16	l/s	W
Absolute Vmin in gpm	130	FC06	uint16	gpm	W
Absolute Vmin in selected unit	131	FC16	uint32	l/h	W
Absolute Pmax in selected unit	170	FC16	uint32	kW	W
Unit Selection Volume	149	FC06	uint16		W
Select Meter Register	204	FC06	uint16		W
Command	2	FC06	uint16		W
Setpoint Flow at DeltaT in liter per second	41	FC16	uint32	l/s	W
Setpoint Flow at DeltaT in gpm	43	FC16	uint32	gpm	W
Setpoint Flow at DeltaT in selected unit	45	FC16	uint32	l/h	W
Communication Watchdog	109	FC06	uint16		W
Sensor 1 Type	120	FC06	uint16		W
Sensor 1 Passive Sensor Type	121	FC06	uint16		W
Unit selection pressure difference	151	FC06	uint16		W
Absolute differential water pressure setpoint in selected unit	172	FC16	uint32	bar	W
Absolute differential water pressure setpoint in psi	174	FC16	uint32	psi	W
Absolute differential water pressure setpoint in kPa	176	FC16	uint32	kPa	W
Bus watchdog fail action	108	FC06	uint16		W

Belimo Energy Valve V4 Modbus TCP

Overview

Key readings

Available commands

Use cases

Installation

Things to watch for

Registers (98)

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