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Janitza Modbus register maps

Updated 29 October 2026

8 Janitza models, 579 registers in all, each re-typed from Janitza’s own free documentation and checked against it.

• Power meter (power analyser)

  Janitza UMG 104 power analyser (RS-485 Modbus RTU)

  UMG 104 DIN-rail power analyser, firmware 1.268, per address list 1.041.006.1.e (01/2023).

  69 registers · 5 writable · RTU
  Also known as: UMG104, UMG 104, Janitza UMG104
• Power meter (power quality analyser)

  Janitza UMG 509-PRO power quality analyser (Modbus RTU / Modbus TCP)

  UMG 509-PRO per Modbus address list 1.059.004.2.n (06/2024).

  81 registers · 19 writable · RTU/TCP
  Also known as: UMG509-PRO, UMG 509PRO, UMG509PRO, Janitza UMG 509
• Power meter (power quality analyser)

  Janitza UMG 512-PRO power quality analyser (Modbus RTU / Modbus TCP)

  UMG 512-PRO power quality analyser, per address list 1.054.016.3.k (08/2023).

  72 registers · 17 writable · RTU/TCP
  Also known as: UMG512-PRO, UMG 512, UMG512, UMG 512 PRO, Janitza UMG512-PRO
• Power meter (power quality analyser)

  Janitza UMG 604-PRO power analyser (Modbus RTU / Modbus TCP)

  UMG 604-PRO from firmware release 5.028, per address list 1.033.034.e (08/2023).

  76 registers · 4 writable · RTU/TCP
  Also known as: UMG604-PRO, UMG 604PRO, UMG604PRO, UMG 604-EP PRO, Janitza UMG 604
• Power meter (power quality analyser)

  Janitza UMG 605-PRO power quality analyser (Modbus RTU / Modbus TCP)

  UMG 605-PRO from firmware release 5.028, per address list 1.038.009.7.h (09/2022).

  73 registers · 2 writable · RTU/TCP
  Also known as: UMG605-PRO, UMG 605PRO, UMG605PRO, Janitza UMG 605
• Power meter (energy analyser)

  Janitza UMG 96-S2 energy analyser (serial Modbus)

  UMG 96-S2 energy analyser, per address list 2.062.026.1.b (10/2019).

  61 registers · 10 writable · RTU
  Also known as: UMG96-S2, UMG 96 S2, UMG96S2, Janitza UMG96-S2
• Power meter (power analyser)

  Janitza UMG 96RM power analyser (basic device, RS-485 Modbus RTU)

  UMG 96RM basic device from firmware release 1.14, per address list 1.040.034.t; the same list covers the shared registers of the -P, -CBM and -PN extensions. Other UMG 96RM variants (e.g. the Ethernet -E / -EL) are not covered by this list.

  76 registers · 16 writable · RTU
  Also known as: UMG96RM, UMG 96 RM, UMG 96RM-P, UMG 96RM-CBM, UMG 96RM-PN, Janitza UMG96RM
• Power meter (power analyser)

  Janitza UMG 96RM-E power analyser (Ethernet, Modbus TCP / RTU)

  UMG 96RM-E from firmware 3.01 / hardware release 104, per address list 1.040.085.8.n (06/2024).

  71 registers · 13 writable · RTU/TCP
  Also known as: UMG96RM-E, UMG 96 RM-E, UMG96RME, Janitza UMG96RM-E

Janitza: default communication settings

Factory defaults as the manufacturer documents them. Change one setting at a time on site and write down what you changed. Word order applies to 32-bit values; the addressing column says how the manufacturer prints register numbers (every map on this site also gives the 0-based wire address).