Siemens MD-BMS - Page 116

Appendices
Appendix L
-
Core Measurement Parameters
-
Energy
116
Building Technologies 125-202
06/06/2017
Measurement Parameters: Energy BACnet
Object
Identifier
Modbus
Register
Modbus
Offset
(Offset to a
Base of 40001)
kVAh – Apparent Energy defined as Kilovolt-Ampere-Hours
is a measure of apparent energy. if the power factor has been constant (1.0) during the time period of metering (measuring) the load, then
kVAh * Power Factor = kWh, or kWh/kVAh= Average PF. kVAh is primarily metered and used by utility suppliers for various billing uses based
upon the user's average power factor; often a concern of industrial applications.
System Total Apparent Energy (kVAh System)
= unsigned value of ABS(kVAh L1)+ABS(kVAh L2)+ABS(kVAh L3), in kVAh
= kVAh Sys, signed, absolute, in kW, BACnet
= kVAh Sys value, unsigned, total instantaneous true energy, in kVAh
= positive kVAh Sys, unsigned, positive instantaneous true energy, in kVAh
= negative kVAh Sys, unsigned, negative instantaneous true energy, in kVAh
NOTES:
If kVAh sys value>0, kVAh sys pos = kVAh sys, kVAh sys neg = 0
If kVAh sys value<0, kVAh sys neg = kVAh sys, kVAh sys pos = 0
7000
‒
‒
7001
‒
7002
‒
‒
44011 lsw
44012 msw
46011 lsw
46012 msw
47011 lsw
47012 msw
‒
4010 lsw
4011 msw
6010 lsw
6011 msw
7010 lsw
7011 msw
Individual Phase Apparent Energy- L1 (kVAh L1)
= kVAh L1 value, signed, individual L1 kVAh energy in kVAh, BACnet
= kVAh L1 value, unsigned, individual L2 kVAh energy, in kVAh
= positive kVAh L1 value, unsigned, individual L2 kVAh energy, in kVAh
= negative kVAh L1 value, unsigned, individual L2 kVAh energy, in kVAh
NOTES:
If kVAh L1 value>0, pos kVAh L1 = total kVAh L1, neg kVAh L1 = 0
If kVAh L1 value<0, neg kVAh L1 = total kVAh L1, pos kVAh L1 = 0
‒
‒
‒
7020
‒
7030
‒
‒
44041 lsw
44042 msw
46041 lsw
46042 msw
47041 lsw
47042 msw
‒
4040 lsw
4041 msw
6040 lsw
6041 msw
7040 lsw
7041 msw
Individual Phase Apparent Energy- L2 (kVAh L2)
= kVAh L2 value, signed, individual L2 kVAh energy in kVAh, BACnet
= kVAh L2 value, unsigned, individual L2 kVAh energy, in kVAh
= positive kVAh L2 value, unsigned, individual L2 kVAh energy, in kVAh
= negative kVAh L2 value, unsigned, individual L2 kVAh energy, in kVAh
NOTES:
If kVAh L2 value>0, pos kVAh L2 = total kVAh L2, neg kVAh L2 = 0)
If kVAh L2 value<0, neg kVAh L2 = total kVAh L2, pos kVAh L2 = 0)
‒
‒
‒
7050
‒
7060
‒
‒
44043 lsw
44044 msw
46043 lsw
46044 msw
47043 lsw
47044 msw
‒
4042 lsw
4043 msw
6042 lsw
6034 msw
7042 lsw
7043 msw
Individual Phase Apparent Energy- L3 (kVAh L3)
= kVAh L3 value, signed, individual L3 kVAh energy in kVAh, BACnet
= kVAh L3 value, unsigned, individual L2 kVAh energy, in kVAh
= positive kVAh L3 value, unsigned, individual L2 kVAh energy, in kVAh
= negative kVAh L3 value, unsigned, individual L2 kVAh energy, in kVAh
NOTES:
If kVAh L3 value>0, pos kVAh L3 = total kVAh L3, neg kVAh L3 = 0
If kVAh L3 value<0, neg kVAh L3 = total kVAh L3, pos kVAh L3 = 0
‒
‒
‒
7080
‒
709
‒
‒
44045 lsw
44046 msw
46045 lsw
46046 msw
47045 lsw
47046 msw
‒
4044 lsw
4045 msw
6044 lsw
6045 msw
7044 lsw
7045 msw