Schneider Electric PowerLogic PM3255

Power and energy meter

METSEPM3255 is a three-phase panel meter for external current transformers. Its RS-485 port and local display make a bounded Modbus read possible, provided the installed wiring, CT ratio and serial settings are recorded. The PM3255 also has two digital inputs, two digital outputs and logging functions; those are separate from the simple measurement read described here.

Schneider Electric PowerLogic PM3255
  • Modbus RTU

Power and energy meter

Compatibility

Documented read-only Modbus path

Schneider documents a local FC03 Modbus read of the PM3255 voltage table through its RS-485 port.

Use this PM3200 map as a best-effort starting point for METSEPM3255. Confirm the CT ratio, wiring and serial settings, then compare the first voltage read with the display. PM3250 and PM5000 are separate models.

Connect it with

For the documented RS-485 Modbus RTU server interface

  • Modbus
  • Edge
  • Platforms
Power and energy meter
Interface
Gateway
Edge
Output
PowerLogic PM3255Meter RS-485 terminals
Isolated serial interfaceApproved RS-485-to-host adapter
ZGW-20 GatewayHosts Edge locally
EpiSensor EdgeEdge Modbus client
Customer platformMQTT · API · files
Modbus RTU · RS-485
Isolated serial
Runs locally
Optional onward data
Use the meter’s serial Modbus port, not an assumed Ethernet endpoint. Confirm the installed address, speed and framing on its display. The customer-platform output is optional; Edge remains the local system of record.

Models

Download
ModelsInterfaceRoute into Edge
METSEPM3255RS-485 Modbus RTU, two digital inputs and two digital outputsRead measurement registers with an Edge Modbus client; do not send configuration commands.
PM3250 and other PM3200 variantsFeature and I/O differencesUse their own model details before adopting any PM3255-specific point or setup instruction.

Interface

Documented measurements and integration boundaries for PowerLogic PM3255.

  • Phase currents and phase-to-neutral and line voltages as Float32 readings.
  • Total active power in kW at register 3060.
  • Import and export energy as four-register Int64 Wh counters, separate from the Float32 Wh copies.
  • Digital I/O and log records require their own documented functions and configuration.

Assessment

Use this PM3200 map as a best-effort starting point for METSEPM3255. Confirm the CT ratio, wiring and serial settings, then compare the first voltage read with the display. PM3250 and PM5000 are separate models.

InteroperabilityWell supported
Schneider identifies RS-485 Modbus RTU, FC03 reads and an exact register/address table.124
AccuracySupported with conditions
Class 0.5S is stated for METSEPM3255; system accuracy still depends on matching CTs and correct wiring.1
SecurityNot yet assessed
The retained product and Modbus pages do not establish authenticated or encrypted serial transport.4
ReliabilitySupported with conditions
The local display supports comparison with fresh reads, while register data and logs must be kept distinct.25
RuggednessNot yet assessed
A complete installed environmental and enclosure limit has not been established from these captures.1
ScalabilitySupported with conditions
Addressed RS-485 permits a designed serial bus; capacity depends on the real wiring and poll schedule.14
LifecycleNot yet assessed
The current product page does not establish a firmware support term or map applicability to every installed revision.12

Setup

Read L1-N voltage without changing the meter

The PM3200 table gives the PM3255 L1-N voltage at hexadecimal address 0x0BD3, decimal register 3028, as a two-register Float32 in V.

Function and PDU
FC03, 03 0B D3 00 02; the unit address and RTU CRC surround the PDU.
Address convention
Use 0x0BD3 from the Address column. Do not send decimal 3028 as the PDU address.
Decode and unit
Read all four response data bytes as one IEEE-754 Float32 in V. Establish the returned word order against the local display; no universal word order is assumed here.
Acceptance
Compare a fresh result with the simultaneous L1-N display on a wiring system that includes neutral.

Acceptance: This is a documented starting read. Compare it with the display once to confirm addressing and decoding, then add the current, power and frequency points above.

  1. Identify the meter and wiring

    Read the complete METSEPM3255 label and installed firmware, then confirm the CT secondary, primary ratio and measurement wiring with the authorised installer.

  2. Match the serial settings

    On the local display, record the Modbus unit address, baud rate, parity and stop bits. Match the Edge serial client and use only FC03 reads for this check.

  3. Read the voltage

    Read two registers from PDU address 0x0BD3 for L1-N voltage. Register 3028 is the manual’s decimal reference, one above the address sent on the bus.

  4. Compare the display

    Decode the complete Float32 value with the verified word order, compare it with the simultaneous display and reject stale or implausible values before expanding the point list.

  5. Keep counters separate

    Treat Int64 energy and log file records as different representations. Preserve Wh units and full counter width; do not turn I/O or command-register descriptions into monitoring writes.

  6. Add current, power and frequency

    After the voltage check, add phase 1 current at register 3000, PDU address 2999 / 0x0BB7, total active power at 3060, address 3059 / 0x0BF3, and frequency at 3110, address 3109 / 0x0C25. Use FC03 and two registers per Float32 value: A, kW and Hz respectively. Start with separate reads and the voltage decoder, compare the display, then group points. Keep kW as kW; multiply by 1000 only when the destination requires W.

Common questions

Is register 3028 the wire address?
No. The manual says its hexadecimal Address column is sent in the frame. L1-N voltage is register 3028 but PDU address 0x0BD3, decimal 3027.23
Can the energy counters be read as two-register floats?
The map has a four-register Int64 Wh counter and separate two-register Float32 copies. Their widths and encodings are different, so choose one explicitly.5
Does the PM3255 provide Ethernet?
The exact METSEPM3255 product page names RS-485 Modbus. This guide uses that local serial path.1

Sources

  1. METSEPM3255 product identity (official web-reader capture) (opens in a new tab) Schneider Electric
  2. PM3200 user manual DOCA0006EN-09, current and voltage table (official web-reader capture) (opens in a new tab) Schneider Electric
  3. PM3200 user manual DOCA0006EN-09, table address convention (official web-reader capture) (opens in a new tab) Schneider Electric
  4. PM3200 user manual DOCA0006EN-09, supported Modbus functions (official web-reader capture) (opens in a new tab) Schneider Electric
  5. PM3200 user manual DOCA0006EN-09, energy register table (official web-reader capture) (opens in a new tab) Schneider Electric

Further reading

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