TECO Westinghouse EV inverter

Register map(s) for this device, with a note of how far each has been checked. Addresses are 0-based, as on the wire. Scale and byte order are confirmed only at the hardware-verified rung.

coherence-checked

Round-trips through a real Modbus stack with no overlapping addresses and a word-order-sensitive codec — the map is internally coherent and wire-decodable. Does NOT prove byte-order or scaling match a real device: the emulator is seeded from the map's own types, so a uniformly wrong byte-order still round-trips. Only hardware-verified confirms byte-order/scale on the wire.

point	address (0-based)	type	scale	unit
Parameter F01	1	U16	1
Parameter F02	2	U16	1
Parameter F03	3	U16	1
Parameter F04	4	U16	1
Parameter F05	5	U16	1
Parameter F06	6	U16	1
Parameter F08 / C15	7	U16	1
Parameter F07	8	U16	1
Parameter F09	10	U16	1
Parameter F10	11	U16	1
Parameter C23	12	U16	1
Parameter C24	13	U16	1
Parameter F11	14	U16	1
Parameter F12	15	U16	1
Parameter F13	16	U16	1
Parameter F14	17	U16	1
Parameter F15	18	U16	1
Parameter F17	19	U16	1
Parameter F18	20	U16	1
Parameter F21	21	U16	1
Parameter F22	22	U16	1
Parameter F23	23	U16	1
Parameter F26	24	U16	1
Parameter F27	25	U16	1
Parameter F28	26	U16	1
Parameter F29	27	U16	1
Parameter F30	28	U16	1
Parameter F31	29	U16	1
Parameter F32	30	U16	1
Parameter F33	31	U16	1
Parameter F34	32	U16	1
Parameter F35	33	U16	1
Parameter F36	34	U16	1
Parameter F37	35	U16	1
Parameter F38	36	U16	1
Parameter F39	37	U16	1
Parameter F40	38	U16	1
Parameter F41	39	U16	1
Parameter F42	40	U16	1
Parameter C25	41	U16	1
Parameter F51	42	U16	1
Parameter F52	43	U16	1
Parameter C47	48	U16	1
Parameter C00	100	U16	1
Parameter C01	101	U16	1
Parameter C02	102	U16	1
Parameter C03	103	U16	1
Parameter C04	104	U16	1
Parameter C05	105	U16	1
Parameter C06	106	U16	1
Parameter C07	107	U16	1
Parameter C08	108	U16	1
Parameter C09	109	U16	1
Parameter C10	110	U16	1
Parameter C11	111	U16	1
Parameter C12	112	U16	1
Parameter C13	113	U16	1
Parameter C40	114	U16	1
Parameter C42	115	U16	1
Parameter C43	116	U16	1
Parameter C44	117	U16	1
Parameter F19	118	U16	1
Parameter F20	119	U16	1
Parameter C45	120	U16	1
Parameter C46	121	U16	1
Parameter C17	122	U16	1
Parameter C18	123	U16	1
Parameter C19	124	U16	1
Parameter C20	125	U16	1
Parameter C21	126	U16	1
Parameter C26	128	U16	1
Parameter C27	129	U16	1
Parameter C28	130	U16	1
Parameter C29	131	U16	1
Parameter C48	132	U16	1
Parameter C49	133	U16	1
Parameter C50	134	U16	1
Parameter C51	135	U16	1
Parameter C52	136	U16	1
Parameter C53	137	U16	1
Parameter C30	138	U16	1
Parameter C31	139	U16	1
Parameter C32	140	U16	1
Parameter C33	141	U16	1
Parameter C34	142	U16	1
Parameter C35	143	U16	1
Parameter C36	144	U16	1
Parameter C37	145	U16	1
Parameter F16	146	U16	1
Parameter C38	147	U16	1
Parameter C39	148	U16	1
Parameter F43	149	U16	1
Parameter F44	150	U16	1
Parameter F46	151	U16	1
Parameter F47	152	U16	1
Parameter F45	153	U16	1
Parameter C14	154	U16	1
Parameter C54	155	U16	1
Parameter C55	156	U16	1
Parameter C41	157	U16	1
Parameter C16	158	U16	1
Parameter F24	159	U16	1
Parameter F25	160	U16	1
Parameter F48	220	U16	1
Parameter F49	221	U16	1
Parameter F50	223	U16	1
Operation Command	230	U16	1
Frequency Command	231	U16	1
Remote Keypad Used	232	U16	1
Operation state	239	U16	1
Fault Description	240	U16	1
Sequence input status / Contact output	241	U16	1
Frequency command	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	% / 10V
Keypad AIN input value	250	U16	1	% / 10V
Remote keypad used	251	U16	1
Remote keypad used	252	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.
coherence-checked — Round-trips through a real Modbus stack with no overlapping addresses and a word-order-sensitive codec — the map is internally coherent and wire-decodable. Does NOT prove byte-order or scaling match a real device: the emulator is seeded from the map's own types, so a uniformly wrong byte-order still round-trips. Only hardware-verified confirms byte-order/scale on the wire.
hardware-verified (software-key) x1 — Matched a real device with operator-attested readings as ground truth — the only rung that confirms word order + scaling on the wire.

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