Siemens MD-BMS - Page 109

Appendices
Appendix J
-
Core Measurement Parameters: Power Factor
109
Building Technologies 125-202
06/06/2017
Measurement Parameters: Power Factor BACnet
Object
Identifier
Modbus
Register
Modbus
Offset
(Offset to a
Base of 40001)
dPF – Displacement Power Factor
is the difference between applied power and true power when only the phase relationship of voltage and current at the fundamental are taken
into account, expressed in decimal form; for example, 0.98.
System Total Displacement Power Factor (dPF)
= system dPF value, signed, system total displacement power factor; BACnet
= system dPF value, unsigned, Modbus register is 100x actual value
= positive dPF value, unsigned, Modbus register is 100x actual value
= negative dPF value, unsigned, Modbus register is 100x actual value
NOTES:
If total dPF value>0, positive dPF = total dPF, negative dPF = 0
If total dPF value<0, negative dPF = total dPF, positive dPF = 0
9000
‒
‒
‒
‒
44014
46014
47014
‒
4013
6013
7013
Individual Phase Displacement Power Factor- L1 (dPF L1)
= dPF L1 value, signed, individual L1 phase total dPF, BACnet
= dPF L1 value, unsigned, Modbus register is 100x actual value
= positive dPF L1 value, unsigned, Modbus register is 100x actual value
= negative dPF L1 value, unsigned, Modbus register is 100x actual value
NOTES:
If dPF value>0, positive dPF = system dPF, negative dPF = 0
If dPF value<0, negative dPF = system dPF, positive dPF = 0
9060
‒
‒
‒
‒
44050
46050
47050
‒
4049
6049
7049
Individual Phase Displacement Power Factor- L2 (dPF L2)
= dPF L2 value, signed, individual L2 phase total dPF, BACnet
= dPF L2 value, unsigned, Modbus register is 100x actual value
= positive dPF L2 value, unsigned, Modbus register is 100x actual value
= negative dPF L2 value, unsigned, Modbus register is 100x actual value
NOTES:
If dPF value>0, positive dPF = system dPF, negative dPF = 0
If dPF value<0, negative dPF = system dPF, positive dPF = 0
9090
‒
‒
‒
‒
44051
46051
47051
‒
4050
6050
7050
Individual Phase Displacement Power Factor- L3 (dPF L3)
= dPF L3 value, signed, individual L3 phase total dPF, BACnet
= dPF L3 value, unsigned, Modbus register is 100x actual value
= positive dPF L3 value, unsigned, Modbus register is 100x actual value
= negative dPF L3 value, unsigned, Modbus register is 100x actual value
NOTES:
If dPF value>0, positive dPF = system dPF, negative dPF = 0
If dPF value<0, negative dPF = system dPF, positive dPF = 0
9120
‒
‒
‒
‒
44052
46052
47052
‒
4051
6051
7051