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  2. Electron do Brasil
  3. MoniTemp

Electron do Brasil MoniTemp Modbus register map

Three-channel temperature monitor with alarm, shutdown and fan relays, analog output and Modbus RTU

  • Official
  • 53 registers
  • Modbus RTU
  • Revision 1 · 2026-11-10

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.

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Communication

Protocol
Modbus RTU
Unit ID
1
Serial
9600 8N1 · 9600 baud, 8 data bits, none parity, 1 stop bit
Byte / word order
ABCD · bytes big-endian, words high first
Addresses
1-based · wire address = address − 1

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

Map

Registers
53 holding registers
Groups
6
Translation tables
6
Revision
1 · 2026-11-10
Added
()
File
maps/electron/monitemp.mbmap.json · 13 KB · history
SHA-256
5684cbbed26006edd309abb30126c666790a586a0222419f0dd3d3d6a16f18b7
Manufacturer
electron.com.br

Sources and notes

Source: Electron do Brasil, Mapa de Registradores MODBUS RTU, MoniTemp, v1.2

  • All registers are holding registers. The document numbers them 1 to 38 and calls the type Holding Register (40.000), so the addresses are 1-based (address on the wire = number minus 1). The document does not say so explicitly: if a read fails, try address_base 0.
  • The document allows 1200 to 57600 bps with automatic baud rate detection, 8 data bits, 1 stop bit and no, even or odd parity. It gives no default baud rate or slave address: 9600 N and 1 are placeholders; the slave address is in register 23.
  • Temperatures are shown in the document with one decimal (for example -50.0 to 250.0) and a scale of -1000:10, which it does not explain. They are given as raw values: check against the display before applying a scale.
  • Registers 17, 19, 32, 33, 34, 35 and 37 are bit fields, one entry per bit. The command bits are write-only. Registers 27, 28 and 36 are not in the document.
  • Written from the manufacturer's document; not tested on a device.
AreaAddressNameTypeAccessUnitScaleDescription
HR 1 int16 RW Range -50.0 to 250.0; the document's scale column (-1000:10) is not explained, so the value is raw (check against the display)
HR 2 int16 RW Range -50.0 to 250.0; the document's scale column (-1000:10) is not explained, so the value is raw (check against the display)
HR 3 int16 RW Range -50.0 to 250.0; the document's scale column (-1000:10) is not explained, so the value is raw (check against the display)
HR 4 int16 RW Range -50.0 to 250.0; the document's scale column (-1000:10) is not explained, so the value is raw (check against the display)
HR 5 int16 RW Range -50.0 to 250.0; the document's scale column (-1000:10) is not explained, so the value is raw (check against the display)
HR 6 int16 RW Range -50.0 to 250.0; the document's scale column (-1000:10) is not explained, so the value is raw (check against the display)
HR 7 int16 RW Range -50.0 to 250.0; the document's scale column (-1000:10) is not explained, so the value is raw (check against the display)
HR 8 int16 RW Range -50.0 to 250.0; the document's scale column (-1000:10) is not explained, so the value is raw (check against the display)
HR 9 int16 RW Range -50.0 to 250.0; the document's scale column (-1000:10) is not explained, so the value is raw (check against the display)
HR 10 uint16 RW Range 0 to 100; the document gives no scale
HR 11 uint16 RW Range 0 to 300; the document gives no scale
HR 12 uint16 RW min Range 0 to 20; the scale column says 1:10, which does not fit minutes, so the value is raw
HR 13 uint16 RW The document labels every value "when 0"; the value is the index of the range
HR 14 uint16 RW
HR 15 int16 RW Range -50.0 to 250.0; the document's scale column (-1000:10) is not explained, so the value is raw (check against the display)
HR 16 int16 RW Range -50.0 to 250.0; the document's scale column (-1000:10) is not explained, so the value is raw (check against the display)
HR 17 bool bit 0 W The document lists value 0 for both automatic and manual (ON); 1 is taken to be ON
HR 17 bool bit 1 W Write 1
HR 17 bool bit 2 W Write 1
HR 18 uint16 RW
HR 19 bool bit 0 RW
HR 19 bool bit 1 RW
HR 19 bool bit 2 RW
HR 20 uint16 RW The range is 0 to 2 in the document, but only 0 and 1 are described
HR 21 uint16 RW
HR 22 uint16 RW The range is 0 to 2 in the document, but only 0 and 1 are described
HR 23 uint16 R Range 1 to 254
HR 24 int16 R Range -50.0 to 250.0; the document's scale column (-1000:10) is not explained, so the value is raw (check against the display)
HR 25 int16 R Range -50.0 to 250.0; the document's scale column (-1000:10) is not explained, so the value is raw (check against the display)
HR 26 int16 R Range -50.0 to 250.0; the document's scale column (-1000:10) is not explained, so the value is raw (check against the display)
HR 29 int16 R Range -50.0 to 250.0; the document's scale column (-1000:10) is not explained, so the value is raw (check against the display)
HR 30 int16 R Range -50.0 to 250.0; the document's scale column (-1000:10) is not explained, so the value is raw (check against the display)
HR 31 int16 R Range -50.0 to 250.0; the document's scale column (-1000:10) is not explained, so the value is raw (check against the display)
HR 32 bool bit 0 R
HR 32 bool bit 1 R
HR 32 bool bit 2 R
HR 32 bool bit 3 R
HR 33 bool bit 0 R
HR 33 bool bit 1 R
HR 33 bool bit 2 R
HR 34 bool bit 0 R
HR 34 bool bit 1 R
HR 34 bool bit 2 R
HR 34 bool bit 3 R
HR 35 bool bit 0 R
HR 35 bool bit 1 R
HR 35 bool bit 2 R
HR 35 bool bit 3 R
HR 37 bool bit 0 R
HR 37 bool bit 1 R
HR 37 bool bit 2 R
HR 37 bool bit 3 R
HR 38 uint16 R Range 0 to 9999

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