GE EPM 7000 Modbus register map

Device identity

What a tool can read to check that this map fits the connected device (SPEC.md section 4.7). Registers with a role are read like any other register.

Sources and notes

• Multilin EPM 7000/7000T Power Quality Meter Instruction Manual · version 1601-0266-A6
  Appendix B, Modbus register map (MM-1 to MM-32)

Source: GE Vernova Multilin, "Multilin EPM 7000/7000T Power Quality Meter Instruction Manual", product revision 1.10 (1601-0266-A6)

• All registers are holding registers (FC03 read, FC06/FC10 write). Addresses here are the zero-based hex addresses of the manual; the manual's decimal register numbers are one higher (e.g. 0x03E7 = register 1000).
• 32-bit values and floats span two registers with the high-order half first.
• Factory settings in normal mode are 57600 baud, address 1, Modbus RTU. Right after power-up the RS-485 port also answers at 9600 baud, address 1 (factory initial default settings).
• Energy registers are integers whose scale, digit count and decimal places follow the power and energy format setting (register 0x7535). Reset the energy after changing that format.
• Per-phase power and power factor are non-zero only with a wye hookup. The EPM 7100 is not covered by this manual.
• Not in this map: the integer readings block, uncompensated readings, minimum/maximum blocks and timestamps, harmonic and waveform registers, option card blocks, programmable settings, secondary readings and log retrieval.