UK24MOD
Belimo Gateway MP to Modbus RTU
www.belimo.com
UK24MOD • en • v1.7 • 02.2014 • Subject to changes
13 / 20
Modbus register description
Register 1:
Setpoint
Setpoint for actuator setting in hundredths of one percent,
i.e. 0…10,000 corresponds to 0…100%
In the case of actuators for fire dampers, the control must be accomplished through the
Override control register (2). Writing access to the setpoint is refused (see Register 6).
Register 2:
Override control
Overriding the setpoint with defined values
Override control
0
None
1
Open
2
Closed
3
Min
4
Mid
5
Max
6
Fast_closed
Due to safety considerations, the only override values permitted in the case of actuators for fire
dampers are Open (1) and Fast_closed (6). The operating position (Open) must also be
repeated within 120 seconds (recommendation: 90 sec.).
If the override command is not renewed, then the Gateway will move the actuator into safety
position and signal an error (see Register 6). The remaining time for the renewal is visible in
Register 13.
Register 3:
Command
Initiation of actuator functions for Service and Test; the selected command is transmitted to the
actuator, after which the register will be reset once more.
Command
0
None
1
Adaption
2
Test run
3
Synchronisation
4
Reset actuator malfunctions
MPL actuators (Actuator Type: 6) support only the command Adaption.
Register 4:
Actual position
Actual position in hundredths of one percent,
i.e.
0…10,000 corresponds to 0…100%
Register 5:
Relative volumetric flow
Relative volumetric flow in hundredths of one percent of Vnom,
i.e. 0…10,000 corresponds to 0…100%
This value is available only for VAV controllers and EPIV units (Actuator Type: 5).
For all other types, 65535 will be entered.
