Registers for Branch circuits on a HDPM6000

[jrobitai]

Hello -  I am trying to figure-out how to calculate the register numbers for:HDPM6000. for the branch circuits on the HDPM6000:

 - I_Avg
 - V_Avg
 - PF_tot
 - kVAR_total
 - kW Real

The HDPM has 42 branches and configured for 14 3-phase circuits. The circuits are grouped like:
Ckt Channels
A      1,3,5
B     2,4,6
C     7,9,11
D     8,10,12
etc......

I had looked at the protocol guide and can't quite figure this out.

Thanks

[Charles_Murison · Accepted solution]

Hello @jrobitai 

I am assuming you are referring to https://www.se.com/ww/en/download/document/ZL0192-0A/ as protocol guide.

Looking at page 1 I see the following information:

"For simplicity, this document only deals with Modbus addresses using 0-based numbering. Modbus terminology puts register 1 is at address 0."

Per Circuit Registers
C = (channel number * 10) – where the channel number ranges from 1 to 192.
Register Value
C + 0 VRMS in 0.1V steps (other steps maybe configured in regs 4498-4501)
C + 1 Circuit number (for creating single, two, three or four phase circuits)
C + 2 IRMS in 10mA steps (other steps maybe configured in regs 4498-4501)
C + 3 CT Type
C + 4 Pfactor * 1000 (signed)
C + 5 Watts in 1W steps (other steps maybe configured in regs 4498-4501)
C + 6 CT Factor * 1000
C + 7 iTHD
C + 8 Phase (1, 2 or 3) - 0 is disconnected
C + 9 Expected phase (1, 2 or 3) – as programmed during setup
Examples:
• VRMS for circuit 1 would be address 10 (1 * 10) + 0
• Power factor for circuit 9 would be address 94 (9 * 10) + 4

C + 1 Circuit number
This number is used to indicate whether channels should be grouped together
as two phase or three phase circuits – or left as a single phase circuit.
Examples:
• Channels that have a unique circuit number will be treated as single
phase circuits.
• If channels 3 and 5 have the same circuit number, e.g. 3, these will be
treated as a two phase circuit
• If channels 7, 9 and 11 have the same circuit number, e.g. 7, these will
be treated as a three phase circuit
• If the top bit of a three phase circuit is set, e.g. hexadecimal 8007
(32775 in decimal), then it is treated as being connected to a delta
load.

If this does not help, recommend contacting technical support for more assistance.

Regards,

Charles