TECO Westinghouse EV inverter

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	unit
operation_command	230	U16	1
frequency_command_write	231	U16	0.01	Hz
remote_keypad_used	232	U16	1
operation_status	239	U16	1
fault_description	240	U16	1
sequence_input_status	241	U16	1
frequency_command_read	242	U16	0.01	Hz
output_frequency	243	U16	0.01	Hz
output_voltage_command	244	U16	0.1	V
output_dc_voltage_command	245	U16	1	V
output_current	246	U16	0.1	A
pid_feedback_value	247	U16	0.1	%
pid_input_value	248	I16	0.1	%
tm2_ain_input_value	249	U16	1	%
keypad_ain_input_value	250	U16	1	%

link settings as documented (unverified): RTU/ASCII; FC 03,06,08,16; Supports RS485 and RS232 protocols. Frame length maximum 80 bytes.

bench facts as documented (unverified)

terminals	RSA, RSB
termination	Terminate the communications line with a (120 ohm, 1/4 watt) resistor at both ends.
wiring notes	RS-485 or RS232 interface
response timeout	400 ms
broadcast	supported
protocol notes	Drive response time is 10ms. Retries a maximum of two times on timeout or checksum error, displaying 'ERR6' if error persists.
doc revision	Rev. 1.00

⚠ disputed: output_voltage_command @ 244 scaling is 10/1V — disputed by 7300EV MODBUS Protocol Overview which states the scaling is 1/1V [3.3.3]

⚠ disputed: output_current @ 246 scaling is 10/1A — disputed by 7300EV MODBUS Protocol Overview which states the scaling is 1/1A

⚠ disputed: tm2_ain_input_value @ 249 and keypad_ain_input_value @ 250 scaling is 100% / 10V — disputed by 7300EV MODBUS Protocol Overview which states the scaling is 1024 / 10V

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

There is a discrepancy in scaling for output voltage command (00F4H), output current (00F6H), and analog inputs (00F9H, 00FAH) between the EV Inverter Series Modbus Manual and the 7300EV Modbus Protocol Overview. The former specifies 10/1V, 10/1A, and 100% scaling, while the latter specifies 1/1V, 1/1A, and 1024 scaling. [source]
confirmed: Supports RS485 and RS232 protocols with Modbus RTU/ASCII framing and a maximum frame length of 80 bytes — confirmed by TECO Westinghouse EV Inverter Series Modbus Communication Manual [1.1.1]
confirmed: Supports Modbus function codes 3, 6, 8, and 16 — confirmed by TECO Westinghouse EV Inverter Series Modbus Communication Manual
confirmed: Physical interface uses RSA and RSB terminals and requires a 120 ohm, 1/4 watt termination resistor at both ends — confirmed by TECO Westinghouse EV Inverter Series Modbus Communication Manual
confirmed: Response timeout is 400ms, and the drive retries up to 2 times before displaying 'ERR6' — confirmed by TECO Westinghouse EV Inverter Series Modbus Communication Manual
confirmed: Register addresses 230 (00E6H) to 250 (00FAH) map to operation command, frequency command, status, and analog inputs — confirmed by TECO Westinghouse EV Inverter Series Modbus Communication Manual

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.