verified connector library

Cummins PowerCommand PCC1301 genset controller

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.

pointaddress (0-based)typescaleunit
genset_control_switch_position9U161Switch position
genset_operating_state10U161Operating state
fault_code11U161Event code
fault_type12U161Fault type
alternator_voltage_l_n_a17U161AC Volts
alternator_voltage_l_n_b18U161AC Volts
alternator_voltage_l_n_c19U161AC Volts
alternator_voltage_l_l_ab21U161AC Volts
alternator_voltage_l_l_bc22U161AC Volts
alternator_voltage_l_l_ca23U161AC Volts
alternator_voltage_regulation24U161AC Volts
alternator_current_a25U160.1AC Amps
alternator_current_b26U160.1AC Amps
alternator_current_c27U160.1AC Amps
alternator_average_current28U160.1AC Amps
alternator_kva_a39U160.1kVA
alternator_kva_b40U160.1kVA
alternator_kva_c41U160.1kVA
alternator_kva_total42U160.1kVA
alternator_frequency43U160.1Hz
control_battery_voltage60U160.1DC Volts
engine_oil_pressure61U161kPa
engine_coolant_temperature63U160.1Degrees Celsius
engine_speed67U160.1RPM
engine_starts68U161Number of starts
engine_runtime_high_byte69U161Sec
engine_runtime_low_byte70U161Sec

link settings as documented (unverified): RTU; default 19200 8E1; unit ID 1; FC 03,06,08,16; Two-wire RS485 master/slave multi-drop bus.

bench facts as documented (unverified)
terminalsHi (+) TB2-3, Lo (-) TB2-4, Shield TB2-1
wiring notesTwo-wire RS485
max registers/read40
response timeout100 ms
protocol notesThe external device can read 1-40 contiguous registers, write 1-40 contiguous registers.
model register43033
serial register43049
doc revisionA029X159 (Issue 7)

⚠ disputed: The external device can read 1-40 contiguous registers — disputed by Cummins Modbus Register Mapping Guide (A029X159) which explicitly states 'The master device can read 1-16 contiguous registers, write 1-16 contiguous registers' for the PCC1301/PowerCommand 1.x/PS0500 map, whereas 1-40 contiguous registers applies to other controllers like PowerCommand 2.x/3.x

field reports — community-sourced, unverified (checked 2026-06-11)
  • The PCC1301 control does not support fault reset commands through the Modbus registers. [source]
  • confirmed: Physical terminals Hi (+) TB2-3, Lo (-) TB2-4, Shield TB2-1 — confirmed by Cummins PCC1301 Operator and Installation Manual and OmniMetrix TrueGuard-PRO Installation Guide
  • confirmed: Baud rates [2400, 4800, 9600, 19200] and default baud 19200 — confirmed by Cummins PCC1301 Owner Manual (Modbus Submenus section)
  • confirmed: Modbus RTU protocol on a two-wire RS485 multi-drop bus — confirmed by Cummins Modbus Register Mapping Guide (A029X159)

The trust ladder

Each rung states what it proved and what it did not. Gray until proven; green is earned by hardware only.

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.