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  2. Unipi Technology
  3. Edge E412

Unipi Technology Edge E412 Modbus register map

Modbus TCP I/O unit with 4 digital inputs and 2 digital outputs (with PWM)

  • Official
  • 62 registers
  • Modbus TCP
  • Revision 3 · 2026-11-10
  • 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.

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Communication

Protocol
Modbus TCP
Unit ID
1
TCP port
502
Byte / word order
CDAB · bytes big-endian, words low first (word swap)
Addresses
0-based

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

Map

Registers
50 holding registers, 12 coils
Groups
12
Revision
3 · 2026-11-10
Added
()
File
maps/unipi/edge-e412.mbmap.json · 10 KB · history
SHA-256
5abd1d99398c639cb1ff826efb67a77a1f6bb90ec1999aca72cbfaf04b05aa5b
Manufacturer
www.unipi.technology

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 version holding 1000 uint16
Serial number PCB serial number holding 1005 uint32 CDAB

Sources and notes

  • Edge E412 Modbus map · version 2.0
    Holding registers and Coils sheets (Unit ID 0 and Unit ID 1), Description sheet

Source: Edge E412 Modbus map v2.0, Unipi technology

  • Registers are 0-based. Bit numbers: 0 = LSB, 15 = MSB. 32-bit values are assumed low word first (CDAB), as on the Unipi extensions; the manual does not state the word order.
  • Registers marked Reserved in the manual are left out.
  • Transport is not stated in the manual; Modbus TCP on port 502 is assumed.
  • I/O, configuration and command registers are on Unit ID 1. The user LED, storage and connection registers (addresses 3000-4203) are on Unit ID 0. Defaults: debounce 50 (5 ms), DirectSwitch off, MWD timeout 2500 ms and disabled.
AreaAddressNameTypeAccessUnitScaleDescription
HR 3998 bool bit 0 W
HR 3998 bool bit 1 W
HR 3998 bool bit 2 W
HR 4000 uint16 R %
HR 4001 uint16 R %
HR 4200 uint16 R
HR 4201 uint16 R
HR 4202 uint16 R dBm
HR 4203 uint16 R
CO 3000 bool W
CO 3001 bool W
CO 3002 bool W
HR 0 bool bit 0 R
HR 0 bool bit 1 R
HR 0 bool bit 2 R
HR 0 bool bit 3 R
HR 1 bool bit 0 RW
HR 1 bool bit 1 RW
HR 2 bool bit 0 RW
HR 2 bool bit 1 RW
HR 3 uint32 CDAB RW Pulse counter; writable to reset
HR 5 uint32 CDAB RW Pulse counter; writable to reset
HR 7 uint32 CDAB RW Pulse counter; writable to reset
HR 9 uint32 CDAB RW Pulse counter; writable to reset
HR 11 uint16 RW
HR 12 uint16 RW
HR 14 bool bit 0 RW
HR 14 bool bit 1 RW
HR 15 bool bit 0 RW
HR 15 bool bit 1 RW
HR 1000 uint16 R Firmware version (raw number)
HR 1001 uint16 bits 0–7 R
HR 1001 uint16 bits 8–15 R
HR 1002 uint16 bits 0–3 R
HR 1002 uint16 bits 4–7 R
HR 1002 uint16 bits 8–15 R
HR 1003 uint16 R
HR 1004 uint16 R
HR 1005 uint32 CDAB R
HR 1008 uint16 RW ms MasterWatchDog timeout; default 2500 ms
HR 1009 uint16 R Reference voltage of the MCU (raw)
HR 1010 uint16 RW ms ×0.1 Raw unit is 100 us; default 50 (5 ms)
HR 1011 uint16 RW ms ×0.1 Raw unit is 100 us; default 50 (5 ms)
HR 1012 uint16 RW ms ×0.1 Raw unit is 100 us; default 50 (5 ms)
HR 1013 uint16 RW ms ×0.1 Raw unit is 100 us; default 50 (5 ms)
HR 1014 bool bit 0 RW
HR 1014 bool bit 1 RW
HR 1015 bool bit 0 RW
HR 1015 bool bit 1 RW
HR 1016 bool bit 0 RW
HR 1016 bool bit 1 RW
HR 1017 uint16 RW
HR 1018 uint16 RW
CO 0 bool RW
CO 1 bool RW
CO 2 bool R
CO 3 bool R
CO 4 bool R
CO 5 bool R
CO 1000 bool RW Clears the MWD reboot indication
CO 1002 bool W
CO 1003 bool W Stores the current configuration so it is used at startup

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