Delta DPH UPS Modbus card

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
rating_input_voltage	1025	U16	1
rating_input_frequency	1026	U16	0.1
rating_output_voltage	1027	U16	1
rating_output_frequency	1028	U16	0.1
rating_va	1029	U16	10
rating_output_power	1030	U16	10
rating_battery_voltage	1039	U16	1
seconds_on_battery	1057	U16	1
estimated_minutes_remaining	1058	U16	1
estimated_charge_remaining	1059	U16	1
battery_voltage	1060	U16	0.1
battery_current	1061	U16	0.1
temperature	1062	U16	1
battery_level	1063	U16	1
negative_battery_voltage	1065	U16	0.1
negative_battery_current	1066	U16	0.1
negative_battery_temperature	1067	U16	1
negative_battery_level	1068	U16	1
input_frequency_1	1073	U16	0.1
input_voltage_1	1074	U16	0.1
input_current_1	1075	U16	0.1
input_power_1	1076	U16	10
input_frequency_2	1077	U16	0.1
input_voltage_2	1078	U16	0.1
input_current_2	1079	U16	0.1
input_power_2	1080	U16	10
input_frequency_3	1081	U16	0.1
input_voltage_3	1082	U16	0.1
input_current_3	1083	U16	0.1
input_power_3	1084	U16	10
output_frequency	1091	U16	0.1
output_voltage_1	1093	U16	0.1
output_current_1	1094	U16	0.1
output_power_1	1095	U16	10
output_load_1	1096	U16	1
output_voltage_2	1097	U16	0.1
output_current_2	1098	U16	0.1
output_power_2	1099	U16	10
output_load_2	1100	U16	1
output_voltage_3	1101	U16	0.1
output_current_3	1102	U16	0.1
output_power_3	1103	U16	10
output_load_3	1104	U16	1
bypass_frequency	1110	U16	0.1
bypass_voltage_1	1112	U16	0.1
bypass_current_1	1113	U16	0.1
bypass_power_1	1114	U16	10
bypass_voltage_2	1115	U16	0.1
bypass_current_2	1116	U16	0.1
bypass_power_2	1117	U16	10
bypass_voltage_3	1118	U16	0.1
bypass_current_3	1119	U16	0.1
bypass_power_3	1120	U16	10
bypass_sts_temperature	1124	U16	1
environment_temperature	1129	U16	1

link settings as documented (unverified): RTU; baud 2400/4800/9600/19200; FC 01,02,03,04,05,06; Baud rate, parity, protocol, and termination are configured via DIP switches SWZ2 (RS-232) and SWZ3 (RS-485).

bench facts as documented (unverified)

terminals	Pin 1: D+ (T+), Pin 2: D- (T-), Pin 3: GND for RS-485. Pin 4: TxD, Pin 5: RxD, Pin 6: GND for RS-232.
A/B polarity	D+, D-
termination	Enable/Disable RS-485 Termination Resistor via switch SWZ3-7
sentinel values	0xFFFF in Input Registers represents that your UPS does not support the address.
model register	0x0507
firmware register	0x050E

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

There is a major register map conflict between the older 'MODBUS Communication Card' and the newer 'Mini MODBUS Card'. For example, register 0x0421 represents 'Input Voltage 1' on the older card but 'Seconds on Battery' on the newer card, and 0x0431 represents 'Output Number Lines' on the older card but 'Input Frequency 1' on the newer card. [source]
confirmed: comms defaults (baud rates 2400-19200, RTU framing, DIP switches SWZ2/SWZ3) — confirmed by Delta Mini MODBUS Card User Manual [1.2.1]
confirmed: identification registers (firmware 0x050E, model 0x0507) — confirmed by Delta Mini MODBUS Card User Manual
confirmed: physical terminals (Pin 1: D+, Pin 2: D-, Pin 3: GND for RS-485; Pin 4: TxD, Pin 5: RxD, Pin 6: GND for RS-232) — confirmed by Delta Mini MODBUS Card User Manual
confirmed: termination switch (SWZ3-7) — confirmed by Delta Mini MODBUS Card User Manual
confirmed: sentinel value (0xFFFF for unsupported addresses) — confirmed by Delta UPS Modbus TCP General Info & Configuration (Version 02.13) and Delta UPS Modbus Definition (v02.09)
confirmed: register map (rating_input_voltage @ 1025, input_frequency_1 @ 1073, output_voltage_1 @ 1093, etc.) — confirmed by Delta UPS Modbus TCP User Manual and Delta UPS Modbus Definition (v02.09)

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.

Device not here? Upload its manual and get a checked map back. It's free.

Want it confirmed against your own device? Order hardware verification. If it doesn't check out, you don't pay.

Building on a lot of devices? License the library — machine-readable maps, the firmware matrix, and API access.