Modbus Registers OPTIMA...BLC1MOD
VAV-Compact
Volumetric flow compact control device
6 VAV-Compact Modbus Register • en-gb • 2019-03 • Subject to changes www.belimo.com
Modbus Register Description
No. Address Description 
Comment
Range
Enumeration
Unit Scaling Access
111 110 Nominal volumetric flow – m
3
/h 1 R
112 111 – – – – –
113 112
Nominal volumetric flow
Vnom in unit selected (Register 118) LowWord 
Lower 16 bit of 32 bit value
– UnitSel 0.001 R
114 113 Nominal volumetric flow
Vnom in unit selected (Register 118) HighWord 
Upper 16 bit of 32 bit value
115 114 – – – – –
116 115 – – – – –
117 116 Control Mode 0:  Position control
1:  Flow control
– – R / W
118 117 Unit Selection Flow 0:  m
3
/s
1:  m
3
/h
2:  l/s
3:  l/min
4:  l/h
5:  gpm
6:  cfm
Default: m
3
/h(1)
– – R / W
119 118 Setpoint Source
Analog: Setpoint from analog signal 0 ... 10 V on wire 3
Bus: Setpoint from Modbus (Register 1)
0:  Analog
1:  Bus
Default: Bus(1)
– – R / W






