Siemens MD-BMS - Appendix J - Core Measurement Parameters: Power Factor

Appendices
Appendix J
-
Core Measurement Parameters: Power Factor
108
Building Technologies 125-202
06/06/2017
Appendix J - Core Measurement Parameters: Power Factor
Measurement Parameters: Power Factor BACnet
Object
Identifier
Modbus
Register
Modbus
Offset
(Offset to a
Base of 40001)
aPF – Apparent Power Factor (generic Power Factor)
is the ratio of true power (watts) to apparent power (volt-amperes), expressed in decimal form; for example, 0.98.
System Total Apparent Power Factor (aPF)
= system aPF value, signed, system total apparent power factor; BACnet
= system aPF value, unsigned, Modbus register is 100x actual value
= positive aPF value, unsigned, Modbus register is 100x actual value
= negative aPF value, unsigned, Modbus register is 100x actual value
NOTES:
If total aPF value>0, positive aPF = total aPF, negative aPF = 0
If total aPF value<0, negative aPF = total aPF, positive aPF = 0
9030
‒
‒
‒
‒
44015
46015
47015
‒
4014
6014
7015
Individual Phase Apparent Power Factor- L1 (aPF L1)
= aPF L1 value, signed, individual L1 phase total aPF, BACnet
= aPF L1 value, unsigned, Modbus register is 100x actual value
= positive aPF L1 value, unsigned, Modbus register is 100x actual value
= negative aPF L1 value, unsigned, Modbus register is 100x actual value
NOTES:
If aPF value>0, positive aPF = system aPF, negative aPF = 0
If aPF value<0, negative aPF = system aPF, positive aPF = 0
9150
‒
‒
‒
‒
44053
46053
47053
‒
4052
6052
7052
Individual Phase Apparent Power Factor- L2 (aPF L2)
= aPF L2 value, signed, individual L2 phase total aPF, BACnet
= aPF L2 value, unsigned, Modbus register is 100x actual value
= positive aPF L2 value, unsigned, Modbus register is 100x actual value
= negative aPF L2 value, unsigned, Modbus register is 100x actual value
NOTES:
If aPF value>0, positive aPF = system aPF, negative aPF = 0
If aPF value<0, negative aPF = system aPF, positive aPF = 0
9180
‒
‒
‒
‒
44054
46054
47054
‒
4053
6053
7053
Individual Phase Apparent Power Factor- L3 (aPF L3)
= aPF L3 value, signed, individual L3 phase total aPF, BACnet
= aPF L3 value, unsigned, Modbus register is 100x actual value
= positive aPF L3 value, unsigned, Modbus register is 100x actual value
= negative aPF L3 value, unsigned, Modbus register is 100x actual value
NOTES:
If aPF value>0, positive aPF = system aPF, negative aPF = 0
If aPF value<0, negative aPF= system aPF, positive aPF = 0
9210
‒
‒
‒
‒
44055
46055
47055
‒
4054
6054
7054