{ "manufacturer": "kohler", "model": "decision-maker-550", "device": "decision-maker-550", "category": "Altro", "protocol": "modbus", "version": "v1", "firmware": null, "verification": "IMPORTED", "isDemo": false, "source": { "title": "kohler decision-maker-550 — modbus-database (registers.json)", "url": "https://www.aggsoft.com/serial-data-logger/tutorials/modbus-data-logging/kohler-decision-maker-550.htm", "documentRef": null, "revision": null }, "generatedAt": "2026-09-21T13:15:36.166Z", "registers": [ { "address": "1", "addressNumeric": 1, "signal": "l2_l3_voltage", "name": "L2-L3-voltage", "description": "L2-L3-voltage", "functionCode": 3, "datatype": "uint16", "length": 1, "scale": 1, "offset": 0, "unit": "Volts AC", "access": "READ", "endianness": null, "group": null, "notes": null }, { "address": "2", "addressNumeric": 2, "signal": "l3_l1_voltage", "name": "L3-L1-voltage", "description": "L3-L1-voltage", "functionCode": 3, "datatype": "uint16", "length": 1, "scale": 1, "offset": 0, "unit": "Volts AC", "access": "READ", "endianness": null, "group": null, "notes": null }, { "address": "3", "addressNumeric": 3, "signal": "l1_l0_voltage", "name": "L1-l0-voltage", "description": "L1-l0-voltage", "functionCode": 3, "datatype": "uint16", "length": 1, "scale": 1, "offset": 0, "unit": "Volts AC", "access": "READ", "endianness": null, "group": null, "notes": null }, { "address": "4", "addressNumeric": 4, "signal": "l2_l0_voltage", "name": "L2-l0-voltage", "description": "L2-l0-voltage", "functionCode": 3, "datatype": "uint16", "length": 1, "scale": 1, "offset": 0, "unit": "Volts AC", "access": "READ", "endianness": null, "group": null, "notes": null }, { "address": "5", "addressNumeric": 5, "signal": "l3_l0_voltage", "name": "L3-l0-voltage", "description": "L3-l0-voltage", "functionCode": 3, "datatype": "uint16", "length": 1, "scale": 1, "offset": 0, "unit": "Volts AC", "access": "READ", "endianness": null, "group": null, "notes": null }, { "address": "6", "addressNumeric": 6, "signal": "l1_current", "name": "L1-current", "description": "L1-current", "functionCode": 3, "datatype": "uint16", "length": 1, "scale": 1, "offset": 0, "unit": "Amps AC", "access": "READ", "endianness": null, "group": null, "notes": null }, { "address": "7", "addressNumeric": 7, "signal": "l2_current", "name": "L2-current", "description": "L2-current", "functionCode": 3, "datatype": "uint16", "length": 1, "scale": 1, "offset": 0, "unit": "Amps AC", "access": "READ", "endianness": null, "group": null, "notes": null }, { "address": "8", "addressNumeric": 8, "signal": "l3_current", "name": "L3-current", "description": "L3-current", "functionCode": 3, "datatype": "uint16", "length": 1, "scale": 1, "offset": 0, "unit": "Amps AC", "access": "READ", "endianness": null, "group": null, "notes": null }, { "address": "9", "addressNumeric": 9, "signal": "frequency", "name": "Frequency", "description": "Frequency", "functionCode": 3, "datatype": "uint16", "length": 1, "scale": 1, "offset": 0, "unit": "Hz X 100", "access": "READ", "endianness": null, "group": null, "notes": null }, { "address": "10", "addressNumeric": 10, "signal": "total_kw", "name": "Total-kw", "description": "Total-kw", "functionCode": 3, "datatype": "uint16", "length": 1, "scale": 1, "offset": 0, "unit": "kW", "access": "READ", "endianness": null, "group": null, "notes": null }, { "address": "11", "addressNumeric": 11, "signal": "percent_of_rated_kw", "name": "Percent-of-rated-kw", "description": "Percent-of-rated-kw", "functionCode": 3, "datatype": "uint16", "length": 1, "scale": 1, "offset": 0, "unit": "% Rated kW", "access": "READ", "endianness": null, "group": null, "notes": null }, { "address": "12", "addressNumeric": 12, "signal": "total_power_factor", "name": "Total-power-factor", "description": "Total-power-factor", "functionCode": 3, "datatype": "int16", "length": 1, "scale": 1, "offset": 0, "unit": "PF X 100", "access": "READ", "endianness": null, "group": null, "notes": null }, { "address": "13", "addressNumeric": 13, "signal": "l1_kw", "name": "L1-kw", "description": "L1-kw", "functionCode": 3, "datatype": "uint16", "length": 1, "scale": 1, "offset": 0, "unit": "kW", "access": "READ", "endianness": null, "group": null, "notes": null }, { "address": "14", "addressNumeric": 14, "signal": "l1_power_factor", "name": "L1-power-factor", "description": "L1-power-factor", "functionCode": 3, "datatype": "int16", "length": 1, "scale": 1, "offset": 0, "unit": "PF X 100", "access": "READ", "endianness": null, "group": null, "notes": null }, { "address": "15", "addressNumeric": 15, "signal": "l2_kw", "name": "L2-kw", "description": "L2-kw", "functionCode": 3, "datatype": "uint16", "length": 1, "scale": 1, "offset": 0, "unit": "kW", "access": "READ", "endianness": null, "group": null, "notes": null }, { "address": "16", "addressNumeric": 16, "signal": "l2_power_factor", "name": "L2-power-factor", "description": "L2-power-factor", "functionCode": 3, "datatype": "int16", "length": 1, "scale": 1, "offset": 0, "unit": "PF X 100", "access": "READ", "endianness": null, "group": null, "notes": null }, { "address": "17", "addressNumeric": 17, "signal": "l3_kw", "name": "L3-kw", "description": "L3-kw", "functionCode": 3, "datatype": "uint16", "length": 1, "scale": 1, "offset": 0, "unit": "kW", "access": "READ", "endianness": null, "group": null, "notes": null }, { "address": "18", "addressNumeric": 18, "signal": "l3_power_factor", "name": "L3-power-factor", "description": "L3-power-factor", "functionCode": 3, "datatype": "int16", "length": 1, "scale": 1, "offset": 0, "unit": "PF X 100", "access": "READ", "endianness": null, "group": null, "notes": null }, { "address": "19", "addressNumeric": 19, "signal": "total_kvar", "name": "Total-kvar", "description": "Total-kvar", "functionCode": 3, "datatype": "int16", "length": 1, "scale": 1, "offset": 0, "unit": "kVAR", "access": "READ", "endianness": null, "group": null, "notes": null }, { "address": "20", "addressNumeric": 20, "signal": "l1_kvar", "name": "L1-kvar", "description": "L1-kvar", "functionCode": 3, "datatype": "int16", "length": 1, "scale": 1, "offset": 0, "unit": "kVAR", "access": "READ", "endianness": null, "group": null, "notes": null }, { "address": "21", "addressNumeric": 21, "signal": "l2_kvar", "name": "L2-kvar", "description": "L2-kvar", "functionCode": 3, "datatype": "int16", "length": 1, "scale": 1, "offset": 0, "unit": "kVAR", "access": "READ", "endianness": null, "group": null, "notes": null }, { "address": "22", "addressNumeric": 22, "signal": "l3_kvar", "name": "L3-kvar", "description": "L3-kvar", "functionCode": 3, "datatype": "int16", "length": 1, "scale": 1, "offset": 0, "unit": "kVAR", "access": "READ", "endianness": null, "group": null, "notes": null }, { "address": "23", "addressNumeric": 23, "signal": "total_kva", "name": "Total-kva", "description": "Total-kva", "functionCode": 3, "datatype": "uint16", "length": 1, "scale": 1, "offset": 0, "unit": "kVA", "access": "READ", "endianness": null, "group": null, "notes": null }, { "address": "24", "addressNumeric": 24, "signal": "l1_kva", "name": "L1-kva", "description": "L1-kva", "functionCode": 3, "datatype": "uint16", "length": 1, "scale": 1, "offset": 0, "unit": "kVA", "access": "READ", "endianness": null, "group": null, "notes": null }, { "address": "25", "addressNumeric": 25, "signal": "l2_kva", "name": "L2-kva", "description": "L2-kva", "functionCode": 3, "datatype": "uint16", "length": 1, "scale": 1, "offset": 0, "unit": "kVA", "access": "READ", "endianness": null, "group": null, "notes": null }, { "address": "26", "addressNumeric": 26, "signal": "l3_kva", "name": "L3-kva", "description": "L3-kva", "functionCode": 3, "datatype": "uint16", "length": 1, "scale": 1, "offset": 0, "unit": "kVA", "access": "READ", "endianness": null, "group": null, "notes": null }, { "address": "27", "addressNumeric": 27, "signal": "current_lead_lag", "name": "Current-lead/lag", "description": "Current-lead/lag", "functionCode": 3, "datatype": "uint16", "length": 1, "scale": 1, "offset": 0, "unit": "Bits 0-1 Total Current - Leading = 10 Lagging = 01 Bits 2-3 L1 Current Leading = 10 Lagging = 01 Bits 4-5 L2 Current - Leading = 10 Lagging = 01 Bits 6-7 L3 Current - Leading = 10 Lagging = 01", "access": "READ", "endianness": null, "group": null, "notes": null }, { "address": "32", "addressNumeric": 32, "signal": "oil_pressure", "name": "Oil-pressure", "description": "Oil-pressure", "functionCode": 3, "datatype": "uint16", "length": 1, "scale": 1, "offset": 0, "unit": "kPa/psi", "access": "READ", "endianness": null, "group": null, "notes": null }, { "address": "33", "addressNumeric": 33, "signal": "coolant_temperature", "name": "Coolant-temperature", "description": "Coolant-temperature", "functionCode": 3, "datatype": "int16", "length": 1, "scale": 1, "offset": 0, "unit": "Degrees C/Degrees F", "access": "READ", "endianness": null, "group": null, "notes": null }, { "address": "34", "addressNumeric": 34, "signal": "engine_speed", "name": "Engine-speed", "description": "Engine-speed", "functionCode": 3, "datatype": "uint16", "length": 1, "scale": 1, "offset": 0, "unit": "RPM", "access": "READ", "endianness": null, "group": null, "notes": null }, { "address": "35", "addressNumeric": 35, "signal": "local_battery_voltage", "name": "Local-battery-voltage", "description": "Local-battery-voltage", "functionCode": 3, "datatype": "uint16", "length": 1, "scale": 1, "offset": 0, "unit": "Volts DC X 10", "access": "READ", "endianness": null, "group": null, "notes": null }, { "address": "36", "addressNumeric": 36, "signal": "fuel_pressure", "name": "Fuel-pressure", "description": "Fuel-pressure", "functionCode": 3, "datatype": "uint16", "length": 1, "scale": 1, "offset": 0, "unit": "kPa/psi DDEC/MDEC/ADEC only", "access": "READ", "endianness": null, "group": null, "notes": null }, { "address": "37", "addressNumeric": 37, "signal": "fuel_temperature", "name": "Fuel-temperature", "description": "Fuel-temperature", "functionCode": 3, "datatype": "int16", "length": 1, "scale": 1, "offset": 0, "unit": "Degrees C/Degrees F DDEC/MDEC/ADEC only", "access": "READ", "endianness": null, "group": null, "notes": null }, { "address": "38", "addressNumeric": 38, "signal": "fuel_rate", "name": "Fuel-rate", "description": "Fuel-rate", "functionCode": 3, "datatype": "uint16", "length": 1, "scale": 1, "offset": 0, "unit": "Liters/Hour X 100 or Gallons/Hour X 100 DDEC only", "access": "READ", "endianness": null, "group": null, "notes": null }, { "address": "39", "addressNumeric": 39, "signal": "used_last_run", "name": "Used-last-run", "description": "Used-last-run", "functionCode": 3, "datatype": "uint16", "length": 1, "scale": 1, "offset": 0, "unit": "Liters/Gallons DDEC only", "access": "READ", "endianness": null, "group": null, "notes": null }, { "address": "40", "addressNumeric": 40, "signal": "coolant_pressure", "name": "Coolant-pressure", "description": "Coolant-pressure", "functionCode": 3, "datatype": "uint16", "length": 1, "scale": 1, "offset": 0, "unit": "kPa/psi DDEC only", "access": "READ", "endianness": null, "group": null, "notes": null }, { "address": "41", "addressNumeric": 41, "signal": "coolant_level", "name": "Coolant-level", "description": "Coolant-level", "functionCode": 3, "datatype": "uint16", "length": 1, "scale": 1, "offset": 0, "unit": "% X 10 DDEC only", "access": "READ", "endianness": null, "group": null, "notes": null }, { "address": "42", "addressNumeric": 42, "signal": "lube_oil_temperature", "name": "Lube-oil-temperature", "description": "Lube-oil-temperature", "functionCode": 3, "datatype": "int16", "length": 1, "scale": 1, "offset": 0, "unit": "Degrees C/Degrees F DDEC/MDEC/ADEC/Waukesha only", "access": "READ", "endianness": null, "group": null, "notes": null }, { "address": "43", "addressNumeric": 43, "signal": "oil_level", "name": "Oil-level", "description": "Oil-level", "functionCode": 3, "datatype": "uint16", "length": 1, "scale": 1, "offset": 0, "unit": "% X 10 DDEC only", "access": "READ", "endianness": null, "group": null, "notes": null }, { "address": "44", "addressNumeric": 44, "signal": "crankcase_pressure", "name": "Crankcase-pressure", "description": "Crankcase-pressure", "functionCode": 3, "datatype": "uint16", "length": 1, "scale": 1, "offset": 0, "unit": "kPa/psi DDEC only", "access": "READ", "endianness": null, "group": null, "notes": null }, { "address": "45", "addressNumeric": 45, "signal": "ambient_temperature", "name": "Ambient-temperature", "description": "Ambient-temperature", "functionCode": 3, "datatype": "int16", "length": 1, "scale": 1, "offset": 0, "unit": "Degrees C/Degrees F DDEC only", "access": "READ", "endianness": null, "group": null, "notes": null }, { "address": "46", "addressNumeric": 46, "signal": "ecm_battery_voltage", "name": "Ecm-battery-voltage", "description": "Ecm-battery-voltage", "functionCode": 3, "datatype": "uint16", "length": 1, "scale": 1, "offset": 0, "unit": "Volts DC X 10 DDEC/MDEC/ADEC only", "access": "READ", "endianness": null, "group": null, "notes": null }, { "address": "47", "addressNumeric": 47, "signal": "ecm_status", "name": "Ecm-status", "description": "Ecm-status", "functionCode": 3, "datatype": "uint16", "length": 1, "scale": 1, "offset": 0, "unit": "0 = DDEC-Equipped, 1 = Non-ECM, 2 = MDEC/ADEC-Equipped", "access": "READ", "endianness": null, "group": null, "notes": null }, { "address": "48", "addressNumeric": 48, "signal": "intake_air_temperature", "name": "Intake-air-temperature", "description": "Intake-air-temperature", "functionCode": 3, "datatype": "int16", "length": 1, "scale": 1, "offset": 0, "unit": "Degrees C/Degrees F MDEC/ADEC/Waukesha only", "access": "READ", "endianness": null, "group": null, "notes": null }, { "address": "49", "addressNumeric": 49, "signal": "intake_air_pressure", "name": "Intake-air-pressure", "description": "Intake-air-pressure", "functionCode": 3, "datatype": "uint16", "length": 1, "scale": 1, "offset": 0, "unit": "Degrees C/Degrees F MDEC/ADEC only", "access": "READ", "endianness": null, "group": null, "notes": null }, { "address": "50", "addressNumeric": 50, "signal": "mdec_adec_fault_codes", "name": "Mdec/adec-fault-codes", "description": "Mdec/adec-fault-codes", "functionCode": 3, "datatype": "uint16", "length": 1, "scale": 1, "offset": 0, "unit": "Numeric Fault Code MDEC/ADEC only", "access": "READ", "endianness": null, "group": null, "notes": null }, { "address": "60", "addressNumeric": 60, "signal": "analog_input_00_battery_voltage", "name": "Analog-input-00-(battery-voltage)", "description": "Analog-input-00-(battery-voltage)", "functionCode": 3, "datatype": "uint16", "length": 1, "scale": 1, "offset": 0, "unit": "Volts DC", "access": "READ", "endianness": null, "group": null, "notes": null }, { "address": "61", "addressNumeric": 61, "signal": "analog_input01", "name": "Analog-input01", "description": "Analog-input01", "functionCode": 3, "datatype": "uint16", "length": 1, "scale": 1, "offset": 0, "unit": "User-defined and calibrated through the 550 controller. See the controller operation manual.", "access": "READ", "endianness": null, "group": null, "notes": null }, { "address": "62", "addressNumeric": 62, "signal": "analog_input02", "name": "Analog-input02", "description": "Analog-input02", "functionCode": 3, "datatype": "uint16", "length": 1, "scale": 1, "offset": 0, "unit": null, "access": "READ", "endianness": null, "group": null, "notes": null }, { "address": "63", "addressNumeric": 63, "signal": "analog_input03", "name": "Analog-input03", "description": "Analog-input03", "functionCode": 3, "datatype": "uint16", "length": 1, "scale": 1, "offset": 0, "unit": null, "access": "READ", "endianness": null, "group": null, "notes": null } ] }