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

Appendices

Appendix J - Core Measurement Parameters: Power Factor

Appendix J - Core Measurement Parameters: Power Factor
Measurement Parameters: Power Factor
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
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
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
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
108
Building Technologies
BACnet Modbus
Object Register
Identifier
9030 ‒
‒ 44015
‒ 46015
‒ 47015
9150 ‒
‒ 44053
‒ 46053
‒ 47053
9180 ‒
‒ 44054
‒ 46054
‒ 47054
9210 ‒
‒ 44055
‒ 46055
‒ 47055
Modbus
Offset
(Offset to a
Base of 40001)
‒
4014
6014
7015
‒
4052
6052
7052
‒
4053
6053
7053
‒
4054
6054
7054
125-202
06/06/2017