Schneider Electric PowerLogic PM8240

Power quality meter

METSEPM8240 is the standard PowerLogic PM8000 panel meter with an integrated display, 512 MB memory and 256 samples per cycle. Schneider publishes a PM8000 Modbus workbook with fixed read-only measurement registers and documents high-word-first 32-bit values. A bounded read-only Edge path is available after matching the installed firmware, map, CT and VT configuration and the client address convention.

  • Modbus TCP
  • Modbus RTU

Power quality meter

Compatibility

Documented read-only Modbus path

Schneider publishes PM8000 Modbus TCP/RTU support, a model-family register workbook and the transmitted byte and word order. The retained workbook identifies firmware 002.002.001 and marks core electrical measurements read only.

Exact METSEPM8240 standard panel-mount meter. Confirm installed firmware, feature set, CT and VT ratios, wiring, enabled communications and a matching Schneider register workbook. The worked check uses the retained firmware 002.002.001 map. No configuration, reset, I/O, alarm or external-control write is approved.

Connect it with

Route into Edge

For the meter's commissioned Ethernet Modbus server

  • Modbus
  • Edge
  • Platforms
Power quality meter
Interface
Gateway
Edge
Output
PowerLogic PM8240METSEPM8240 Ethernet port
Protected EthernetSegmented LAN
ZGW-20 GatewayHosts Edge locally
EpiSensor EdgeEdge Modbus TCP client
Customer platformMQTT · API · files
Modbus TCP
Protected Ethernet
Runs locally
Optional onward data
Use the meter's assigned address and approved operational network. Confirm that Modbus TCP is enabled and that the client register convention matches Schneider's workbook before polling. The customer-platform output is optional; Edge remains the local system of record.

For the meter's commissioned two-wire serial Modbus server

  • Modbus
  • Edge
  • Platforms
Power quality meter
Interface
Gateway
Edge
Output
PowerLogic PM8240METSEPM8240 RS-485 port
Isolated serial interfaceApproved RS-485-to-host adapter
ZGW-20 GatewayHosts Edge locally
EpiSensor EdgeEdge Modbus RTU client
Customer platformMQTT · API · files
Modbus RTU · RS-485
Isolated serial
Runs locally
Optional onward data
Record unit address, baud rate, parity, stop bits, biasing and termination. Read only the approved measurement registers. The customer-platform output is optional; Edge remains the local system of record.

Models

Download
ModelsInterfaceRoute into Edge
METSEPM8240Integrated display, Ethernet Modbus TCP/IP and two-wire Modbus RTU; standard PM8000 feature setRead fixed measurement-map registers through the commissioned Ethernet or serial server.
PM8140, PM8340 and rail-mount or remote-display PM8000 variantsDifferent feature, sample-rate, display or mounting combinations within the familyConfirm the exact order code and its matching firmware and register map before reusing this guide.
PM800 legacy seriesDifferent product family and register mapsDo not use PM800 documents or offsets for PM8000 devices.

Specifications

Schneider’s METSEPM8240 datasheet dated 16 July 2015 identifies the standard PM8000 panel meter with an integrated display, 512 MB memory and 256 samples per cycle. It specifies ±0.1% current and voltage accuracy and class 0.2S active energy. CTs, VTs, wiring and configuration determine the complete measurement-chain accuracy.1

Exact product
METSEPM8240, standard PM8000, integrated display, 512 MB, 256 samples per cycle1
Published communications
Two-wire Modbus RTU up to 115 kbaud and Ethernet Modbus TCP/IP; ION, DNP3 and IEC 61850 are separate interfaces1
Workbook firmware
002.002.001 in the retained PM8000 Modbus workbook3
Read examples
Current average register 3010, line-to-line voltage average 3026, total active power 3060 and frequency 3110; each is a two-register read-only Float323
32-bit ordering
Most-significant byte first within each word and most-significant word first across two-word values4
Measurement accuracy
Current and voltage ±0.1%; active-energy class 0.2S under the published standards; system accuracy still depends on CTs, VTs, wiring and configuration1

Interface

Documented measurements and integration boundaries for PowerLogic PM8240.

  • Meter name, serial number and firmware identity before measurement polling.
  • Average current, line-to-line voltage, total active and reactive power and frequency from fixed read-only Float32 registers.
  • Delivered and received energy, demand, harmonics and power-quality data only after selecting the exact workbook row, width, unit and representation.
  • Data quality, invalid sentinels and timestamp sources must remain explicit; configuration, resets, I/O and external controls are outside this read-only guide.

Assessment

METSEPM8240 monitoring using the published PM8000 starting map. Confirm a first read against the display and account for any custom mapping.

InteroperabilityWell supported
Schneider publishes Modbus TCP/RTU interfaces, fixed register rows, function support and byte and word order.134
AccuracySupported with conditions
The product publishes 0.1% current and voltage accuracy and class 0.2S active energy; installed CTs, VTs, wiring and configuration remain part of system accuracy.1
SecuritySupported with conditions
The March 2026 manual documents user accounts, read permissions and protocol-port controls. Configure credentials, enabled services and network segmentation for the site.4
ReliabilitySupported with conditions
The March 2026 manual documents invalid readings and Modbus exceptions. Its Float32 invalid response is 0xFFC00000 (NaN). Reject non-finite results and keep communication gaps distinct from zero; client retry and recovery are commissioned separately.4
RuggednessNot yet assessed
A complete installed environmental and enclosure limit was not established in this bounded evidence set.1
ScalabilitySupported with conditions
Addressed serial and Ethernet interfaces support designed multi-meter networks; capacity depends on topology, gateway loading and poll schedule.14
LifecycleSupported with conditions
The exact-model 2015 datasheet, March 2026 manual and April 2026 register-list update are retained. The workbook provides a useful starting map; preserve installed settings and compare readings with the display.123

Setup

Read total active power without changing the meter

The retained firmware 002.002.001 workbook defines total active power at Modbus register 3060 as two read-only FLOAT32 registers in watts.

Function and address
For a zero-based client, start at 3059 / 0x0BF3 and read two registers with FC03: request PDU 03 0B F3 00 02. For a client accepting one-based register numbers, enter 3060. Compare the display before adding points.
Decode and unit
Decode one IEEE-754 Float32 with the most-significant word first and report W. Do not divide by 1,000 unless the destination explicitly requires kW.
Invalid data
The March 2026 manual identifies Float32 0xFFC00000 as NaN. Reject this and other non-finite results. Record timeouts and Modbus exceptions as missing data, not zero; read both words of a Float32 together and compare a fresh value with the display.
Acceptance
Compare a fresh result with the simultaneous total active-power value on the meter and confirm sign against a known import or export condition.

Acceptance: This best-effort starting request combines the published register number with the usual one-based to zero-based conversion. A display comparison confirms the address, unit, sign and decoder on the installed meter; then expand the read-only point group.

  1. Identify the exact meter

    Record METSEPM8240, serial number, installed firmware, feature set and enabled option modules. Keep PM800, PM8000 and ION7400 maps separate.

  2. Record the measurement chain

    Confirm system type, phase wiring, CT and VT ratios, nominal frequency and polarity with the authorised installer before interpreting any value.

  3. Match the register workbook

    The retained firmware 002.002.001 workbook is a best-effort starting map. Confirm that the fixed map is enabled and record custom Modbus Slave mappings. Use the public Schneider register list for later revisions when a point differs; a firmware difference alone need not postpone a display-checked monitoring read.

  4. Configure one read-only path

    Use either the commissioned Ethernet server or the two-wire serial server. Record endpoint or unit address, register convention, timeout and poll rate, and keep every write function disabled.

  5. Add current, power and frequency

    Alongside total active power at register 3060, add current A at 3000 and frequency at 3110. The retained PM8000 map uses two read-only FLOAT32 registers per value, high word first: W, A and Hz respectively. Use FC03 with the client’s register convention and compare the display before grouping reads. Unlike PM3255 and PM5560, PM8240 total power is W; divide by 1000 only to present kW.

Common questions

Does PM8240 support Modbus TCP and RTU?
Yes. The dated METSEPM8240 datasheet documents Ethernet Modbus TCP/IP and two-wire Modbus RTU. Use the commissioned network or serial settings and compare a first workbook read with the meter display.1
Can the PM8000 register map be customised?
Yes. Schneider documents a fixed map built from Data Mapping modules and additional Modbus Slave mappings that can expose extra or duplicate values. The workbook says Modbus Slave addresses cannot conflict with the generic-data section, while they can override certain other sections. Confirm the actual data mapping and fixed-map enable state during commissioning.34
Can Edge write PM8240 configuration from this guide?
No. The selected measurement rows are read only and this guide approves no reset, I/O, alarm, custom-map or external-control write.34
Is the PM8240 a settlement meter?
This guide covers operational monitoring. Meter accuracy markings do not by themselves establish the complete legal-metrology installation, sealed configuration, market approval or settlement process for a particular jurisdiction.1

Sources

  1. METSEPM8240 product datasheet, 16 July 2015 (opens in a new tab) (PDF) Schneider Electric
  2. PM8000 and ION7400 series meter register list (opens in a new tab) Schneider Electric
  3. PM8000 Modbus map for firmware 002.002.001 (opens in a new tab) Schneider Electric
  4. PM8000 user manual, edition 12: security and Modbus (opens in a new tab) Schneider Electric

Further reading

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