verified connector library

AuCom EMX3/CSX/IMS2 soft starter (needs Modbus interface module)

Register map(s) for this device, each at the trust rung it earned. Addresses are 0-based as on the wire. Word order and scaling are confirmed at the hardware-verified rung and at no rung below it.

interop-verified

Read + decoded cleanly over a real network vs an independent third-party Modbus test server (transport and framing; reads are remapped into the server's register window, so the map's own addresses are NOT exercised). Does NOT prove word order/scaling against the actual device.

pointaddress (0-based)typescaleunit
command1U161
starter_status2U161
trip_code3U161
motor_current4U161A
motor_temperature5U161%
product_type_and_version6U161
serial_protocol_version7U161
l1_current599U161A
l2_current600U161A
l3_current601U161A
l1_voltage602U161V
l2_voltage603U161V
l3_voltage604U161V
powerscale_and_power605U161W or kW
power_factor606U160.01%
motor_2_temperature607U161%

link settings as documented (unverified): RTU/ASCII; baud 4800/9600/19200/38400; FC 03,06; Modbus broadcast functions are not supported.

⚠ Remove mains and control voltage from the soft starter before attaching or removing accessories. Failure to do so may damage the equipment. — Starkest reads only; we never write a control register.

bench facts as documented (unverified)
terminalsB3, B2, B1 (RS485 serial port)
termination120 Ohm resistor matching cable impedance at both ends of the RS485 cable
connector6-way pin assembly for soft starter, 5-way male and unpluggable female connector for network
shield/groundConnected to the GND device terminal at both ends and one point of the site protective earth
wiring notesTwisted pair data cable with earth shield is recommended.
max registers/read119
broadcastnot supported
protocol notesA multiple read across register boundary 40008/40009 will result in a Modbus Error code 05 at the Master.
model register40007
firmware register40008
identification notesRegister 40007 contains Product Type (4=CSX/CSXi, 5=MVS/MVX, 6=EMX3) and version. Register 40008 contains Serial Protocol Version.
FC 43 device IDnot supported
powerPowered via the soft starter
environmentIP20
certificationsC-Tick, CE, RoHS, IEC 60947-4-2
doc revision710-02653-00H

⚠ disputed: l1_current @ 599, l2_current @ 600, l3_current @ 601 — disputed by AuCom Modbus Interface Instructions (710-02653-00H) which maps L1 current to 40600 (0-based 599), but maps L2 current to 40601 (0-based 600) and L3 current to 40602 (0-based 601). The provided summary incorrectly shifted the register offsets for L2 and L3 current.

⚠ disputed: l1_voltage @ 602, l2_voltage @ 603, l3_voltage @ 604 — disputed by AuCom Modbus Interface Instructions (710-02653-00H) which maps L1 voltage to 40603 (0-based 602), L2 voltage to 40604 (0-based 603), and L3 voltage to 40605 (0-based 604).

⚠ disputed: powerscale_and_power @ 605, power_factor @ 606, motor_2_temperature @ 607 — disputed by AuCom Modbus Interface Instructions (710-02653-00H) which maps Powerscale and Power to 40606 (0-based 605), Power Factor to 40607 (0-based 606), and Motor 2 Temperature to 40608 (0-based 607).

field reports — community-sourced, unverified (checked 2026-06-11)
  • A multiple read across register boundary 40008/40009 will result in a Modbus Error code 05 at the Master. [source]
  • Registers 40600 and above (including phase currents, voltages, power, and power factor) are not compatible with CSX soft starters; they are only supported on EMX3 and MV models. [source]
  • confirmed: comms defaults (baud rates 4800-38400, RTU/ASCII, function codes 3 and 6, no broadcast) — confirmed by AuCom Modbus Interface Instructions (710-02653-00H)
  • confirmed: control warning regarding removing mains and control voltage before attaching/removing accessories — confirmed by AuCom Modbus Interface Instructions (710-02653-00H)
  • confirmed: physical connection details (6-way pin assembly, 5-way male/female network connector, twisted pair with shield, terminals B1/B2/B3, 120 Ohm termination) — confirmed by AuCom Modbus Interface Instructions (710-02653-00H)
  • confirmed: quirk: multiple read across register boundary 40008/40009 results in Modbus Error code 05 — confirmed by AuCom Modbus Interface Instructions (710-02653-00H)
  • confirmed: identification registers (40007 contains Product Type and version, 40008 contains Serial Protocol Version) — confirmed by AuCom Modbus Interface Instructions (710-02653-00H)

The trust ladder

Each rung states what it proved and what it did not. Gray until proven; green is earned by hardware only.

If your device isn't here, upload its register map. Generation is free, and the connector keeps the rung it earns under testing.

To prove a connector against your own device, order hardware verification. If it doesn't verify, you don't pay.

Platform builders can license the verified library: machine-readable maps, the firmware matrix, API access.