Control Techniques Commander C200/C300 drive (needs AI-485 adapter)

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.

point	address (0-based)	type	scale
output_frequency	400	I16	0.01
output_voltage	401	U16	1
output_power	402	I16	0.01
motor_rpm	403	I16	0.1
dc_bus_voltage	404	U16	1
current_magnitude	300	U16	0.01
torque_producing_current	301	I16	0.01
analog_input_1	600	I16	0.01
analog_input_2	601	I16	0.01
drive_ok	900	U16	1
drive_active	901	U16	1
status_word	939	U16	1
active_trip	919	U16	1
motor_rated_current	406	U16	0.01
motor_rated_speed	407	U16	0.1
motor_rated_voltage	408	U16	1
motor_rated_power_factor	409	U16	0.01
motor_rated_frequency	405	U16	0.01

link settings as documented (unverified): RTU; default 19200 8N2; unit ID 1; FC 03,06,16,23; The communications port applies a 1.25 unit load to the communications network. Default setting is 8 2 NP (8 data bits, 2 stop bits, no parity).

⚠ The STOP and Safe Torque Off functions of the drive do not isolate dangerous voltages from the output of the drive or from any external option unit. — Starkest reads only; we never write a control register.

bench facts as documented (unverified)

terminals	RJ45 or screw terminals
A/B polarity
termination	120 Ohm termination resistor available on RJ45 pin 1 or screw terminal pin 4
connector	RJ45 or screw terminal block
isolation	Single insulated, meets ELV requirements
shield/ground	Minimum number of connections are 2, 3, 7 and shield
wiring notes	Standard Ethernet cables must not be used when connecting drives on a EIA 485 network as they do not have the correct twisted pairs for the pinout of the serial comms port.
inter-frame delay	20 ms
broadcast	supported
sentinel values
protocol notes	The Modbus slave device increments the register address by 1 before processing the command, which effectively prevents access to parameter Pr 00.000 in the drive or option module.
model register	11.028
serial register	11.052
firmware register	11.029
identification notes	Serial number is split into LS (11.052) and MS (11.053).
FC 43 device ID	not supported
power	24 Vdc backup supply input on AI-Backup adaptor
environment	Pollution Degree 2 environment or better (dry, non-conductive pollution only). Ambient temperature up to 40 °C (up to 55 °C with derating)
accuracy
certifications	CE, C Tick, UL / cUL, RoHS, Functional safety, EurAsian Conformity
doc revision	Issue: 2
firmware applicability

⚠ disputed: output_frequency @ 400, output_voltage @ 401, output_power @ 402, motor_rpm @ 403, dc_bus_voltage @ 404, current_magnitude @ 300, torque_producing_current @ 301, analog_input_1 @ 600, analog_input_2 @ 601, drive_ok @ 900, drive_active @ 901, status_word @ 939, active_trip @ 919, motor_rated_current @ 406, motor_rated_speed @ 407, motor_rated_voltage @ 408, motor_rated_power_factor @ 409, motor_rated_frequency @ 405 — disputed by Commander C200/C300 Control User Guide and Parameter Reference Guide. The standard Modbus address formula is (Menu * 100) + Parameter - 1. Therefore, Menu 5 parameters (like output_frequency Pr 05.001) map to 500, not 400. Menu 4 parameters (like current_magnitude Pr 04.001) map to 400, not 300. Menu 7 parameters (like analog_input_1 Pr 07.001) map to 700, not 600. Menu 10 parameters (like drive_ok Pr 10.001) map to 1000, not 900. The entire register map is shifted down by exactly 100 registers.

field reports — community-sourced, unverified (checked 2026-06-11)

confirmed: The communications port applies a 1.25 unit load to the communications network. Default setting is 8 2 NP (8 data bits, 2 stop bits, no parity). — confirmed by Unidrive M200/M201 Control User Guide and Commander C200/C300 Control User Guide
confirmed: The Modbus slave device increments the register address by 1 before processing the command, which effectively prevents access to parameter Pr 00.000 in the drive or option module. — confirmed by Commander C200/C300 Control User Guide

The trust ladder

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

generated — A prompt produced it. Unproven — anyone can regenerate this.
structure-verified — Decode path is structurally sound (addresses, widths, finite values). Does NOT prove word order or scaling.
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.
simulator-verified — Decoded correctly against a protocol emulator seeded with known-true values — catches word-order/scaling errors vs the emulator, not the physical device.
hardware-verified x1 — Matched a real device with operator-attested readings as ground truth — the only rung that confirms word order + scaling on the wire.

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.