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Appendices
Appendix B - MD-BMS and MD-BMED Power Meters Modbus Absolute/Net Value Measurement Registers and
Protocol Commands
78
Building Technologies
125-202
06/06/2017
Modbus
Offset
Register
Description
44616
4615
Volts Multiplier Decimal
Multiply volts values by (this scalar/1000+Volts
Multiplier Integer). Use with Step-down Transformer.
Affects all parameters that use volts (such as kW).
50100
10099 CT1
Integer
Integer part of CT1
50101
10100 CT1
Decimal
Fractional part of NV_CT1
50125
10124 CT1
Type
Select 1 = mV or 2 = Rogowski CT1s.
50199
10198 CT1 Phase Shift
Phase Shift × 100 +/-
50200
10199 CT2
Integer
Integer part of CT2
50201
10200 CT2
Decimal
Fractional part of NV_CT2
50225
10224 CT2
Type
Select 1 = mV or 2 = Rogowski CT2s.
50299
10298 CT2 Phase Shift
Phase Shift × 100 +/-
50300
10299 CT3
Integer
Integer part of CT3
50301
10300 CT3
Decimal
Fractional part of NV_CT3
50325
10324 CT3
Type
Select 1 = mV or 2 = Rogowski CT3s.
50399
10398 CT3 Phase Shift
Phase Shift × 100 +/-
Table 17: Writable Registers.
Modbus
Offset
Register
Description
40129
128
Synchronize Register
Multiple MD Model Power Meter’s synchronization
register.
44066
4065
Clear Accumulated
Measurements
Writing 1234 resets all 'C' registers, accumulated
Power Meter data (kWh, kWh, and so on) stored in
flash to CAM Default value.
Table 18: Device Registers.
Modbus
Offset
Register
Description
44201
4200
Model Number 1st 2 bytes
Model Name 10 bytes (ASCII Alphanumeric)
44202
4201
Model 2
"
44203
4202
Model 3
"
44204
4203
Model 4
"
44205
4204
Model Number last 2 bytes
"
44206
4205
Serial Number 1st 2 bytes
Serial Number 10 bytes (ASCII Alphanumeric)
44207
4206
Serial 2
"
44208
4207
Serial 3
"
44209
4208
Serial 4
"