CyberPower RMCARD205/305 UPS 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	unit
Bypass voltage Phase A	0	U16	0.1	V
Bypass voltage Phase A	1	U16	0.1	V
Bypass voltage Phase B	2	U16	0.1	V
Bypass voltage Phase C	3	U16	0.1	V
Bypass current Phase A	4	U16	0.1	A
Bypass current Phase B	5	U16	0.1	A
Bypass current Phase C	6	U16	0.1	A
Bypass frequency Phase A	7	U16	0.01	Hz
Bypass frequency Phase B	8	U16	0.01	Hz
Bypass frequency Phase C	9	U16	0.01	Hz
Bypass PF Phase A	10	U16	0.01
Bypass PF Phase B	11	U16	0.01
Bypass PF Phase C	12	U16	0.01
Input voltage Phase A	13	U16	0.1	V
Input voltage Phase B	14	U16	0.1	V
Input voltage Phase C	15	U16	0.1	V
Input current Phase A	16	U16	0.1	A
Input current Phase B	17	U16	0.1	A
Input current Phase C	18	U16	0.1	A
Input frequency Phase A	19	U16	0.01	Hz
Input frequency Phase B	20	U16	0.01	Hz
Input frequency Phase C	21	U16	0.01	Hz
Input PF Phase A	22	U16	0.01
Input PF Phase B	23	U16	0.01
Input PF Phase C	24	U16	0.01
Output voltage Phase A	25	U16	0.1	V
Output voltage Phase B	26	U16	0.1	V
Output voltage Phase C	27	U16	0.1	V
Output current Phase A	28	U16	0.1	A
Output current Phase B	29	U16	0.1	A
Output current Phase C	30	U16	0.1	A
Output frequency Phase A	31	U16	0.01	Hz
Output frequency Phase B	32	U16	0.01	Hz
Output frequency Phase C	33	U16	0.01	Hz
Output PF Phase A	34	U16	0.01
Output PF Phase B	35	U16	0.01
Output PF Phase C	36	U16	0.01
Output apparent power Phase A	37	U16	0.1	kVA
Output apparent power Phase B	38	U16	0.1	kVA
Output apparent power Phase C	39	U16	0.1	kVA
Output active power Phase A	40	U16	0.1	kW
Output active power Phase B	41	U16	0.1	kW
Output active power Phase C	42	U16	0.1	kW
Output reactive power Phase A	43	U16	0.1	kVar
Output reactive power Phase B	44	U16	0.1	kVar
Output reactive power Phase C	45	U16	0.1	kVar
Load percent Phase A	46	U16	0.1	%
Load percent Phase B	47	U16	0.1	%
Load percent Phase C	48	U16	0.1	%
Environment temperature	49	U16	1	℃
Battery voltage positive	50	U16	0.1	V
Battery voltage negative	51	U16	0.1	V
Battery current positive	52	I16	0.1	A
Battery current negative	53	I16	0.1	A
Battery temperature	54	U16	0.1	℃
Battery remain time	55	U16	1	min
Battery capacity	56	U16	1	%
Load On Source	81	U16	1
Battery Status	82	U16	1
Battery Connect Status	83	U16	1
EPO	85	U16	1
Invertor Ready Capacity	86	U16	1
Generator Input	87	U16	1
Input Fail	88	U16	1
Bypass Sequence Fail	89	U16	1
Bypass Voltage Fail	90	U16	1
Bypass Fail	91	U16	1
Bypass Over Load	92	U16	1
Bypass Over Load Timeout	93	U16	1
Bypass Untrack	94	U16	1
Output Shorted	96	U16	1
Battery EOD	97	U16	1
Battery Test Result	99	U16	1
Battery Maintain Result	101	U16	1
Manual Tx Bypass	106	U16	1
Battery Volt Low	107	U16	1
Lost N+X Redundant	112	U16	1
Sensor status	116	U16	1
First Module Online Flag Bit	119	U16	1
Second Module Online Flag Bit	120	U16	1
Operation Mode	301	U16	1
Battery Quantity in a String	311	U16	1
UPS Max Capacity	322	U16	1	kVA
Output Voltage	327	U16	1	V
Output Frequency	328	U16	1	Hz
UPS Model Name	427	U16	1
Current Module Number	2000	U16	1
Main Input Voltage Phase A	2001	U16	0.1	V
Main Input Voltage Phase B	2002	U16	0.1	V
Main Input Voltage Phase C	2003	U16	0.1	V
Main Input Current Phase A	2004	U16	0.1	A
Main Input Current Phase B	2005	U16	0.1	A
Main Input Current Phase C	2006	U16	0.1	A
Main Input Frequency Phase A	2007	U16	0.01	Hz
Main Input Frequency Phase B	2008	U16	0.01	Hz
Main Input Frequency Phase C	2009	U16	0.01	Hz
Input PF Phase A	2010	U16	0.01
Input PF Phase B	2011	U16	0.01
Input PF Phase C	2012	U16	0.01
Positive Battery String Voltage	2015	U16	0.1	V
Negative Battery String Voltage	2016	U16	0.1	V
Positive Charger Current	2019	U16	0.1	A
Negative Charger Current	2020	U16	0.1	A
Positive Discharge Current	2021	U16	0.1	A
Negative Discharge Current	2022	U16	0.1	A
Output Current Phase A	2026	U16	0.1	V
Output Current Phase B	2027	U16	0.1	V
Output Current Phase C	2028	U16	0.1	V
Output Frequency Phase A	2029	U16	0.01	A
Output Frequency Phase B	2030	U16	0.01	A
Output Frequency Phase C	2031	U16	0.01	A
Output PF Phase A	2032	U16	0.01
Output PF Phase B	2033	U16	0.01
Output PF Phase C	2034	U16	0.01
Output Voltage Phase A	2035	U16	0.1	V
Output Voltage Phase B	2036	U16	0.1	V
Output Voltage Phase C	2037	U16	0.1	V
Bypass Voltage Phase A	2038	U16	0.1	V
Bypass Voltage Phase B	2039	U16	0.1	V
Bypass Voltage Phase C	2040	U16	0.1	V
Output Apparent Power Phase A	2041	U16	0.1	kVA
Output Apparent Power Phase B	2042	U16	0.1	kVA
Output Apparent Power Phase C	2043	U16	0.1	kVA
Output Active Power Phase A	2044	U16	0.1	kW
Output Active Power Phase B	2045	U16	0.1	kW
Output Active Power Phase C	2046	U16	0.1	kW
Output Reactive Power Phase A	2047	U16	0.1	kVar
Output Reactive Power Phase B	2048	U16	0.1	kVar
Output Reactive Power Phase C	2049	U16	0.1	kVar
Output Load Percentage Phase A	2050	U16	0.1	%
Output Load Percentage Phase B	2051	U16	0.1	%
Output Load Percentage Phase C	2052	U16	0.1	%
Module 1 Comprehensive Alarm	3071	U16	1
Module 1 Comprehensive Alarm	3072	U16	1

link settings as documented (unverified): TCP/RTU; unit ID 255; FC 03,16; Port TCP/502. Unit ID can be any value, recommended 0xFF or 0x00.

bench facts as documented (unverified)

model register

427

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

Some module alarms may be incorrectly triggered when a Bypass Voltage Detect Fail occurs on the Three-Phase Modular UPS (resolved in firmware v1.6.0). [source]
confirmed: Port TCP/502, Unit ID can be any value, recommended 0xFF or 0x00 — confirmed by CyberPower RMCARD205 Remote Management Card User Manual [1.4.3]
confirmed: UPS Model Name at register 427~439 — confirmed by CyberPower RMCARD205 Modbus TCP Register Map for 3-Phase UPS
confirmed: Bypass voltage Phase A at register 0, Phase B at register 2, Phase C at register 3 — confirmed by CyberPower RMCARD205 Modbus TCP Register Map for 3-Phase UPS

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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