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  3. PLA34

BMR PLA34 Modbus register map

Three-phase power quality analyser (RS485)

  • Official
  • 5,252 registers
  • Modbus RTU
  • Revision 3 · 2026-10-18
  • Identity: firmware, serial number

Official: Written from the manufacturer's documentation, but not tested on a device yet. Check the map against the manufacturer's documentation before you write to a live device. Tested it? Report a test.

Download .mbmap.json Raw JSON View on GitHub Suggest a correction Report a problem

Communication

Protocol
Modbus RTU
Unit ID
1default
Serial
9600 8E1 · 9600 baud, 8 data bits, even parity, 1 stop bit defaults
Byte / word order
ABCD · bytes big-endian, words high first
Addresses
0-based

Connection values are defaults: the device may be configured differently.

Map

Registers
5252 holding registers
Groups
30
Translation tables
1
Revision
3 · 2026-10-18
Firmware
from 2.0.54
Added
()
File
maps/bmr/pla34.mbmap.json · 784 KB · history
SHA-256
fc10456a9fa38bca59dbb1739ecb1ccb39afb3e2d60613d69730e038b205f51a
Manufacturer
bmr-trading.com

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.

Registers
RoleRegisterAddressTypeValues
Firmware Firmware major holding 36000 uint16 bits 8–15
Firmware Firmware minor holding 36000 uint16 bits 0–7
Firmware Firmware patch holding 36001 uint16 bits 8–15
Firmware Firmware build holding 36001 uint16 bits 0–7
Serial number Serial number holding 36068 string[4]

Sources and notes

  • PLA34 Modbus registers · version 1.6

Source: BMR, "PLA34 Modbus registers", version 1.6, firmware 2.0.54 and newer

  • BMR PLA34, firmware 2.0.54 and newer. The device reads with FC03 and writes with FC16.
  • Addresses are written as in the manual, from 0. The manual does not list the RS485 defaults.
  • Harmonics are given twice: in volts, amperes, watts or vars from 20000, and in percent from 40481.
  • Energy counters are int64 in tenths of kWh or kvarh (55000-55023), and repeated as float32 (55024-55035).
  • The manual does not say from when the times of the maximums and minimums are counted.
AreaAddressNameTypeAccessUnitScaleDescription
HR 36000 uint16 bits 8–15 R
HR 36000 uint16 bits 0–7 R
HR 36001 uint16 bits 8–15 R
HR 36001 uint16 bits 0–7 R
HR 36002 string[10] R
HR 36012 string[20] R Set by the user
HR 36066 uint16 bits 8–15 R
HR 36066 uint16 bits 0–7 R
HR 36067 uint16 bits 8–15 R
HR 36067 uint16 bits 0–7 R
HR 36068 string[4] R
HR 40001 float32 ABCD R V
HR 40003 float32 ABCD R V
HR 40005 float32 ABCD R V
HR 40009 float32 ABCD R V
HR 40011 float32 ABCD R V
HR 40013 float32 ABCD R V
HR 40017 float32 ABCD R %
HR 40019 float32 ABCD R %
HR 40021 float32 ABCD R %
HR 40023 float32 ABCD R %
HR 40025 float32 ABCD R %
HR 40027 float32 ABCD R %
HR 40029 float32 ABCD R %
HR 40033 float32 ABCD R A
HR 40035 float32 ABCD R A
HR 40037 float32 ABCD R A
HR 40039 float32 ABCD R A
HR 40041 float32 ABCD R %
HR 40043 float32 ABCD R %
HR 40045 float32 ABCD R %
HR 40047 float32 ABCD R %
HR 40049 float32 ABCD R
HR 40051 float32 ABCD R
HR 40053 float32 ABCD R
HR 40057 float32 ABCD R
HR 40059 float32 ABCD R
HR 40061 float32 ABCD R
HR 40065 float32 ABCD R
HR 40081 float32 ABCD R Hz
HR 40089 float32 ABCD R VA
HR 40091 float32 ABCD R VA
HR 40093 float32 ABCD R VA
HR 40097 float32 ABCD R W
HR 40099 float32 ABCD R W
HR 40101 float32 ABCD R W
HR 40105 float32 ABCD R var
HR 40107 float32 ABCD R var
HR 40109 float32 ABCD R var
HR 40113 float32 ABCD R var
HR 40115 float32 ABCD R var
HR 40117 float32 ABCD R var
HR 40121 float32 ABCD R W
HR 40129 float32 ABCD R VA
HR 40137 float32 ABCD R var
HR 40145 float32 ABCD R var
HR 40185 float32 ABCD R V
HR 40187 float32 ABCD R V
HR 40189 float32 ABCD R V
HR 40193 float32 ABCD R V
HR 40195 float32 ABCD R V
HR 40197 float32 ABCD R V
HR 40201 float32 ABCD R V
HR 40203 float32 ABCD R V
HR 40205 float32 ABCD R V
HR 40209 float32 ABCD R V
HR 40211 float32 ABCD R V
HR 40213 float32 ABCD R V
HR 40217 float32 ABCD R %
HR 40219 float32 ABCD R %
HR 40221 float32 ABCD R %
HR 40225 float32 ABCD R %
HR 40227 float32 ABCD R %
HR 40229 float32 ABCD R %
HR 40231 float32 ABCD R %
HR 40233 float32 ABCD R V
HR 40235 float32 ABCD R V
HR 40237 float32 ABCD R V
HR 40241 float32 ABCD R
HR 40243 float32 ABCD R
HR 40245 float32 ABCD R
HR 40249 float32 ABCD R
HR 40251 float32 ABCD R
HR 40253 float32 ABCD R
HR 40281 float32 ABCD R
HR 40283 float32 ABCD R
HR 40285 float32 ABCD R
HR 40289 float32 ABCD R VA
HR 40291 float32 ABCD R VA
HR 40293 float32 ABCD R VA
HR 40297 float32 ABCD R °C
HR 40305 float32 ABCD R °
HR 40307 float32 ABCD R °
HR 40309 float32 ABCD R °
HR 40313 float32 ABCD R °
HR 40315 float32 ABCD R °
HR 40317 float32 ABCD R °
HR 40321 float32 ABCD R
HR 40323 float32 ABCD R
HR 40325 float32 ABCD R

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