Difference between revisions of "Controlling Belimo Valves"
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=== Service Registers === | === Service Registers === | ||
[[File:Belimo modbus2.png|535x535px]] | [[File:Belimo modbus2.png|535x535px]] | ||
== Connecting via FTDI Cable == | |||
FTDI -> Actuator | |||
Orange -> Grey | |||
Yellow -> Pink | |||
Black -> Not Connected | |||
== Example Commands == | == Example Commands == | ||
Revision as of 13:09, 27 May 2022
Belimo valves are one of the most recognised and widely used makes of valve in the HVAC industry.
The libraries on this page provide the tools to control and monitor valves using the MQTT open controls protocol and Node-RED.
Modbus Registers
Note that the register number is one more than address.
Operation Registers
Service Registers
Connecting via FTDI Cable
FTDI -> Actuator
Orange -> Grey
Yellow -> Pink
Black -> Not Connected
Example Commands
Read Setpoint
As an example, to read the Setpoint requires sending a FC3 read command (03) to the device (01 default) calling for register 1 (00 00), requesting a single value (01), ending with the CRC (Cyclic Redundancy Check).
In modbus the following characters would be sent to the valve over RS485:
03 01 00 00 01
Close Valve
06 01 00 00