Cummins PowerCommand 1.1-3.3 controller

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
Bus Message Count	0	U32BE	1
Bus CRC Error Count	2	U32BE	1
Save Trims	3	U16	1
Bus Exception Error Count	4	U32BE	1
Controller Type	8	U16	1
Control Switch Position	9	U16	1
Genset Run Sequence State	10	U16	1
Most Recent Fault or Warning	11	U16	1
Modbus register 40013	12	U16	1
Genset % Standby Total kW	13	I16	0.01	%
NFPA 110 Logical Status	15	U16	1
Extended NFPA 110 Logical Status	16	U16	1
Genset L1N Voltage	17	U16	1	Vac
Genset L2N Voltage	18	U16	1	Vac
Genset L3N Voltage	19	U16	1	Vac
Genset LN Average Voltage	20	U16	1	Vac
Genset L1L2 Voltage	21	U16	1	Vac
Genset L2L3 Voltage	22	U16	1	Vac
Genset L3L1 Voltage	23	U16	1	Vac
Genset LL Average Voltage	24	U16	1	Vac
Genset L1 Current	25	U16	1	Amps
Genset L2 Current	26	U16	1	Amps
Genset L3 Current	27	U16	1	Amps
Genset Average Current	28	U16	1	Amps
Genset Neutral Current	29	U16	1	Amps
Genset L1 kW	30	I16	1	kW
Genset L2 kW	31	I16	1	kW
Genset L3 kW	32	I16	1	kW
Genset Total kW	33	I16	1	kW
Genset L1 kVAR	34	I16	1	kVAR
Genset L2 kVAR	35	I16	1	kVAR
Genset L3 kVAR	36	I16	1	kVAR
Genset Total kVAR	37	I16	1	kVAR
Genset Total Power Factor	38	I16	0.01	PF
Genset L1 kVA	39	U16	1	kVA
Genset L2 kVA	40	U16	1	kVA
Genset L3 kVA	41	U16	1	kVA
Genset Total kVA	42	U16	1	kVA
Genset Frequency OP	43	U16	0.01	Hz
Genset Total Negative kWh	45	U32BE	1	kWh
Genset Total Positive kWh	47	U32BE	1	kWh
Genset Total Net kWh	49	I32BE	1	kWh
Genset Total Negative kVARh	51	U32BE	1	kVARh
Genset Total Positive kVARh	53	U32BE	1	kVARh
Genset Total Net kVARh	55	I32BE	1	kVARh
Genset % Standby L1 Current	57	U16	0.1	%
Genset % Standby L2 Current	58	U16	0.1	%
Genset % Standby L3 Current	59	U16	0.1	%
Battery Voltage	60	U16	0.1	Vdc
Oil Pressure	61	U16	1	kPa
Oil Temperature	62	I16	0.1	degF
Coolant Temperature	63	I16	0.1	degC
Intake Manifold Temperature	64	I16	0.1	degF
Fuel Temperature	65	I16	0.1	degF
Fuel Rate	66	I16	0.05	gal/hr
Average Engine Speed	67	U16	1	RPM
Total Start Attempts OP	68	U16	1	NAr
Engine Running Time	69	U32BE	0.1	seconds
Total Fuel Consumption	71	U32BE	0.1	gallons
Total Number of Runs	73	U32BE	1
Runs Reset Time	75	U16	1
Relay 1-8	2000	U16	1
MB Logical Read Data	2001	U32BE	1
Relay 9-16	2008	U16	1
Software Version	2009	U16	0.0001
Current Fault Status	2011	U16	1
Input 1	2016	U16	1
Input 2	2017	U16	1
Input 3	2018	U16	1
Input 4	2019	U16	1
Input 5	2020	U16	1
Input 6	2021	U16	1
Input 7	2022	U16	1
Input 8	2023	U16	1
Input 9-12	2024	U16	1
Genset L1 Current	2025	U16	1	Amps
Genset L2 Current	2026	U16	1	Amps
Genset L3 Current	2027	U16	1	Amps
Current Source 1 Settings	2028	U16	0.1	mA
Current Source 2 Settings	2029	U16	0.1	mA
Current Source 3 Settings	2030	U16	0.1	mA
Current Source 4 Settings	2031	U16	0.1	mA
Input 1 Settings	2032	U16	1
Input 2 Settings	2033	U16	1
Input 3 Settings	2034	U16	1
Input 4 Settings	2035	U16	1
Input 5 Settings	2036	U16	1
Input 6 Settings	2037	U16	1
Input 7 Settings	2038	U16	1
Input 8 Settings	2039	U16	1
Genset L3 kVA	2040	U16	1	kVA
Genset Total kVA	2041	U16	1	kVA
MB Genset Frequency	2042	U16	0.1	Hz
Genset Total Negative kWh	2043	U32BE	1	kWh
Genset Total Positive kWh	2045	U32BE	0.1	kWh
Genset Total Net kWh	2047	I32BE	1	kWh
Genset Total Negative kVARh	2049	U32BE	1	kVARh
Genset Total Positive kVARh	2051	U32BE	1	kVARh
Genset Total Net kVARh	2053	I32BE	1	kVARh
Genset Available Current	2057	U16	1	Amps
Genset L1 Current Percent	2058	U16	0.1	%
Genset L2 Current Percent	2059	U16	0.1	%
Genset L3 Current Percent	2060	U16	0.1	%
Genset Total kW Percent	2061	I16	0.1	%
Genset Frequency Percent	2062	U16	0.1	%
Genset L1L2 Voltage%	2063	U16	0.1	%
Genset L2L3 Voltage%	2064	U16	0.1	%
Genset L3L1 Voltage%	2065	U16	0.1	%
Utility L1N Voltage	2117	U16	1	Volts
Utility L2N Voltage	2118	U16	1	Volts
Utility L3N Voltage	2119	U16	1	Volts
Utility LN Average Voltage	2120	U16	1	Volts
Utility L1L2 Voltage	2121	U16	1	Volts
Utility L2L3 Voltage	2122	U16	1	Volts
Utility L3L1 Voltage	2123	U16	1	Volts
Utility LL Average Voltage	2124	U16	1	Volts
Utility L1 Current	2125	U16	1	Amps
Utility L2 Current	2126	U16	1	Amps
Utility L3 Current	2127	U16	1	Amps
Utility Average Current	2128	U16	1	Amps
Utility L1 kW	2129	I16	1	kW
Utility L2 kW	2130	I16	1	kW
Utility L3 kW	2131	I16	1	kW
Utility Total kW	2132	I16	1	kW
Utility L1 kVARt	2133	I16	1	kVAR
Utility L2 kVAR	2134	I16	1	kVAR
Utility L3 kVAR	2135	I16	1	kVAR
Utility Total kVAR	2136	I16	1	kVAR
Utility Total Power Factor	2137	I16	0.01
Utility L1 kVA	2138	U16	1	kVA
Utility L2 kVA	2139	U16	1	kVA
Utility L3 kVA	2140	U16	1	kVA
Utility Total kVA	2141	U16	1	kVA
MB Utility Frequency	2142	U16	0.1	Hz
Utility Total Negative kWh	2143	U32BE	1	kWh
Utility Total Positive kWh	2145	U32BE	1	kWh
Utility Total Net kWh	2147	I32BE	1	kWh
Utility Total Negative kVARh	2149	U32BE	1	kVARh
Utility Total Positive kVARh	2151	U32BE	1	kVARh
Utility Total Net kVARh	2153	I32BE	1	kVARh
Utility Total kVAh	2155	U32BE	1	kVARh
System Total kW	2157	I16	1	kW
System Total kVAR	2158	I16	1	kVAR
System Total Power Factor	2159	I16	0.01
System Total kVA	2160	U16	1	kVA
Utility L1 Current Percent	2161	U16	0.1	%
Utility L2 Current Percent	2162	U16	0.1	%
Utility L3 Current Percent	2163	U16	0.1	%
Utility Total kW Percent	2164	I16	0.1	%
Utility Frequency Percent	2165	U16	0.1	%
Utility L1L2 Voltage%	2166	U16	0.1	%
Utility L2L3 Voltage%	2167	U16	0.1	%
Utility L3L1 Voltage%	2168	U16	0.1	%
S1 Average Power Factor	10000	I32BE	1
S1 Frequency	10002	I32BE	1	Hz
S1 L1 kVA	10012	I32BE	1	kVA
S1 L1 kVAR	10016	I32BE	1	kVAR
S1 L1 kW	10018	I32BE	1	kW
S1 L1 Power Factor	10020	I32BE	1
S1 L1 RMS Current	10022	I32BE	1	A
S1 L1-L2 RMS Voltage	10024	I32BE	1	V
S1 L1-N RMS Voltage	10026	I32BE	1	V
S1 L2 kVA	10036	I32BE	1	kVA
S1 L2 kVAR	10040	I32BE	1	kVAR
S1 L2 kW	10042	I32BE	1	kW
S1 L2 Power Factor	10044	I32BE	1
S1 L2 RMS Current	10046	I32BE	1	A
S1 L2-L3 RMS Voltage	10048	I32BE	1	V
S1 L2-N RMS Voltage	10050	I32BE	1	V
S1 L3 kVA	10060	I32BE	1	kVA
S1 L3 kVAR	10064	I32BE	1	kVAR
S1 L3 kW	10066	I32BE	1	kW
S1 L3 Power Factor	10068	I32BE	1
S1 L3 RMS Current	10070	I32BE	1	A
S1 L3-L1 RMS Voltage	10072	I32BE	1	V
S1 L3-N RMS Voltage	10074	I32BE	1	V
S1 LN RMS Current	10076	I32BE	1	A
S1 Phase Rotation	10078	U16	1
S1 Total Exported kVArh	10079	F32BE	1	kVArh
S1 Total Exported kWh	10081	F32BE	1	kWh
S1 Total kVA	10087	I32BE	1	kVA
S1 Total kVAh	10089	F32BE	1	kVAh
S1 Total kVar	10091	I32BE	1	kVAR
S1 Total kW	10093	I32BE	1	kW
S1 L1 Voltage THD %	10095	I32BE	1	%
S1 L2 Voltage THD %	10097	I32BE	1	%
S1 L3 Voltage THD %	10099	I32BE	1	%
S1 Average Voltage THD %	10101	I32BE	1	%
S1 L1 Phase Angle	10103	I32BE	1	deg
S1 L2 Phase Angle	10105	I32BE	1	deg
S1 L3 Phase Angle	10107	I32BE	1	deg
Modbus Device ID	30443	U16	1
Modbus Baud Rate	30444	U16	1
Modbus Parity	30445	U16	1
Modbus Stop Bits	30446	U16	1
Protocol	30447	U16	1
Software Version	30448	U16	1
Device Type	30449	U16	1
AUX 102 Available	30450	U16	1
Save Trims	30451	U16	1

link settings as documented (unverified): RTU/TCP; default 19200 8E1; unit ID 1; FC 03,04,06,08,16; MCM3320 default baud is 19200 with even parity, 1 stop bit. AUX101/102 default Modbus address is 13.

⚠ Cummins controllers that have Modbus RS485 Communication built-in have a dedicated Modbus holding register for 'Save Trims'. The number of write cycles on any flash memory device are finite. Only save trims once all configuration changes are complete. — Starkest reads only; we never write a control register.

bench facts as documented (unverified)

terminals	PCC 1301: TB2-3 (A+), TB2-4 (B-), TB2-1 (Common). PS0500/PowerCommand 1.x/PS0600: TB15-3 (A+), TB15-4 (B-), TB15-1 (Common).
A/B polarity	A (+), B (-)
wiring notes	Two-wire RS485 multi-drop bus
max registers/read	125
response timeout	100 ms
protocol notes	MCM3320 is capable of supporting communication transactions within 10 seconds following initial power-up. Response time is within 100 ms.
model register	40002
serial register	43220
firmware register	42010
doc revision	A029X159 (Issue 26), 6-2020

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

PCC 1.x (1302) controllers require a physical jumper wire between TB15-1 and TB15-5 to disable sleep mode and keep the RS485 port active at all times for Modbus communication. [source]
Writing Modbus commands faster than 625 ms can cause the ModLon II Gateway (used to interface PowerCommand networks to Modbus) to lock up, requiring a power cycle or reset. [source]
confirmed: Document revision A029X159 (Issue 26), 6-2020 — confirmed by official Cummins Modbus Register Mapping manual [1.1.1]
confirmed: MCM3320 default baud is 19200 with even parity, 1 stop bit — confirmed by MCM3320 Modbus Register Map specification
confirmed: AUX101/102 default Modbus address is 13 — confirmed by A029X159 manual
confirmed: Save Trims flash memory warning — confirmed by A029X159 manual section 2.1
confirmed: Physical terminals for PCC 1301 (TB2-3, TB2-4, TB2-1) and PS0500/PowerCommand 1.x/PS0600 (TB15-3, TB15-4, TB15-1) — confirmed by Cummins Operator and Installation manuals
confirmed: Identification registers (firmware_register 42010, model_register 40002, serial_register 43220) — confirmed by A029X159 register map
confirmed: Register map summary (e.g., control_switch_position @ 9, genset_run_sequence_state @ 10, most_recent_fault_or_warning @ 11, etc.) — confirmed by PowerCommand 2.x/3.x Modbus Register Map

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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