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Omron E5CC / E5EC Modbus register map

Digital temperature controllers for 48x48 mm and 48x96 mm panels, Modbus RTU, 2-byte mode

  • Official
  • 69 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 8E1 · 9600 baud, 8 data bits, even parity, 1 stop bit
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
69 holding registers
Groups
5
Translation tables
3
Revision
1 · 2026-11-10
Added
()
File
maps/omron/e5cc-e5ec.mbmap.json · 17 KB · history
SHA-256
02b67f45c564beb868cb8b0aa82be4cbcdd6fefadab0122ed289db4e29cf863e
Manufacturer
www.omron.com

Sources and notes

Source: Omron, E5@C Digital Temperature Controllers Communications Manual (H175), H175-E1-17

  • Uses the manual's 2-byte mode addresses (0x2000 and up), read with function code 03 and written with 06 or 16. The 4-byte mode (addresses from 0x0000, two registers per value) is not mapped; single writes (function 06) work only in 2-byte mode.
  • Set the protocol to Modbus in the communications setting level first (psel); the factory setting is CompoWay/F. The manual requires 8 data bits for Modbus, with 1 stop bit when parity is even or odd and 2 stop bits when there is no parity. It does not state the factory baud rate or parity in text that could be read; 9600 and even parity are the assumed defaults. The unit number can be 1 to 99 (default 1); 0 is broadcast.
  • All values are integers with the decimal point left out (105.0 is sent as 1050), negative values in two's complement. For temperature inputs with one decimal, process value, set points and alarm values carry that decimal; the number of decimals follows the input type and is read from Decimal point monitor (0x2410). Their scale is left at 1 for that reason: divide by 10^decimals yourself. MV, heater current and proportional band always have one decimal and use scale 0.1.
  • Status is a 32-bit word read as two registers: the lower word at 0x2406 (bits 0 to 15) and the upper word at 0x2407 (manual bits 16 to 31, shown here as bit 0 to 15 of that register). Status 2 is at 0x2408 and 0x2409.
  • Run/stop, auto/manual, AT, multi-SP selection, software reset and similar are operation commands, not registers: write function 06 with address 0x0000 and data = command code in the high byte and related information in the low byte (for example 0x0100 run, 0x0101 stop). Communications writing must be enabled (command 00) before settings can be written. Not modelled as registers. Run/stop and communications-writing state can be read in the status bits.
  • The manual covers the E5@C family (E5CC, E5EC, E5AC and others) and does not name the E5CC-T and E5EC-T, so they are not listed; some registers apply only to certain models (heater current, remote SP, position-proportional). Written from the manufacturer's document; not tested on a device.
AreaAddressNameTypeAccessUnitScaleDescription
HR 8192 int16 R Integer with the decimal point left out; the number of decimals is given by Decimal point monitor
HR 8194 int16 R Integer with the decimal point left out; the number of decimals is given by Decimal point monitor; not shown on the controller display
HR 8195 uint16 R A ×0.1 Needs a heater current input (CT)
HR 8196 int16 R % ×0.1
HR 8197 int16 R % ×0.1 Heating and cooling control only
HR 9730 int16 R Integer with the decimal point left out; the number of decimals is given by Decimal point monitor; models with a remote set point input
HR 9735 int16 R % ×0.1 Position-proportional models only
HR 9220 uint16 R Active set point number, 0 to 7
HR 9232 uint16 R Number of decimals (0 to 3) that the process value, set points and alarm values carry
HR 9222 bool bit 0 R
HR 9222 bool bit 2 R
HR 9222 bool bit 3 R
HR 9222 bool bit 4 R
HR 9222 bool bit 6 R
HR 9222 bool bit 7 R
HR 9222 bool bit 8 R
HR 9222 bool bit 9 R
HR 9222 bool bit 10 R
HR 9222 bool bit 11 R
HR 9222 bool bit 12 R
HR 9222 bool bit 13 R
HR 9222 bool bit 14 R
HR 9222 bool bit 15 R
HR 9223 bool bit 4 R
HR 9223 bool bit 5 R
HR 9223 bool bit 6 R
HR 9223 bool bit 7 R
HR 9223 bool bit 8 R
HR 9223 bool bit 9 R
HR 9223 bool bit 10 R
HR 9223 bool bit 11 R
HR 9223 bool bit 12 R
HR 9223 bool bit 15 R
HR 9225 bool bit 4 R
HR 9225 bool bit 5 R
HR 9225 bool bit 11 R
HR 9225 bool bit 12 R
HR 9729 int16 RW Integer with the decimal point left out; the number of decimals is given by Decimal point monitor
HR 9728 int16 RW % ×0.1 Used in manual mode
HR 10498 int16 RW Integer with the decimal point left out; the number of decimals is given by Decimal point monitor
HR 10501 int16 RW Integer with the decimal point left out; the number of decimals is given by Decimal point monitor
HR 10504 int16 RW Integer with the decimal point left out; the number of decimals is given by Decimal point monitor
HR 10507 int16 RW Integer with the decimal point left out; the number of decimals is given by Decimal point monitor
HR 10496 int16 RW Integer with the decimal point left out; the number of decimals is given by Decimal point monitor; used when the multi-SP function is on
HR 10510 int16 RW Integer with the decimal point left out; the number of decimals is given by Decimal point monitor; used when the multi-SP function is on
HR 10524 int16 RW Integer with the decimal point left out; the number of decimals is given by Decimal point monitor; used when the multi-SP function is on
HR 10538 int16 RW Integer with the decimal point left out; the number of decimals is given by Decimal point monitor; used when the multi-SP function is on
HR 10552 int16 RW Integer with the decimal point left out; the number of decimals is given by Decimal point monitor; used when the multi-SP function is on
HR 10566 int16 RW Integer with the decimal point left out; the number of decimals is given by Decimal point monitor; used when the multi-SP function is on
HR 10580 int16 RW Integer with the decimal point left out; the number of decimals is given by Decimal point monitor; used when the multi-SP function is on
HR 10594 int16 RW Integer with the decimal point left out; the number of decimals is given by Decimal point monitor; used when the multi-SP function is on
HR 10752 uint16 RW ×0.1 0.1 to 999.9
HR 10753 uint16 RW Unit is 1 s or 0.1 s depending on the Integral/derivative time unit setting
HR 10754 uint16 RW Unit is 1 s or 0.1 s depending on the Integral/derivative time unit setting
HR 10757 int16 RW % ×0.1
HR 10758 int16 RW % ×0.1
HR 9985 uint16 RW ×0.1
HR 9986 uint16 RW Same unit as the heating integral time
HR 9987 uint16 RW Same unit as the heating derivative time
HR 9990 uint16 RW ×0.1 Scale 0.1 for temperature input; analog input uses 0.01
HR 9991 uint16 RW ×0.1 Scale 0.1 for temperature input; analog input uses 0.01
HR 11264 uint16 RW Changed in the initial setting level; the controller may refuse a write while it runs
HR 11265 uint16 RW
HR 11537 uint16 RW
HR 11535 int16 RW Integer with the decimal point left out; the number of decimals is given by Decimal point monitor
HR 11536 int16 RW Integer with the decimal point left out; the number of decimals is given by Decimal point monitor
HR 11273 int16 RW Analog input only
HR 11275 int16 RW Analog input only
HR 11276 uint16 RW Analog input only; 0 to 3

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