device library

GE Multilin 369 motor management relay

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.

pointaddress (0-based)typescaleunit
GE Multilin Product Code0U161
Product Hardware Revision1U161
Firmware Revision2U161
Installed Modifications3U161
Boot Revision4U161
Order Code8U161
Serial Number character 1 and 232U161
Keypad Access Level80U161
Comm Access Level81U161
Command Function Code128U161
Time240U32BE1
Date242U32BE1
Motor Status512U161
Motor Thermal Capacity Used513U161%
Estimated Time to Trip on Overload514I161s
Restart Attempts515U161
Restart Total Delay516U161sec.
Restart In Progress517U161Y/N
UVR Power Loss Time518U160.1s
Motor Speed Status519U161
Cause of Last Trip544U161
Last Trip Time545U32BE1
Last Trip Date547U32BE1
Last Trip Motor Speed549U161
Phase A Pre-Trip Current550U161A
Phase B Pre-Trip Current552U161A
Phase C Pre-Trip Current554U161A
Motor Load Pre - Trip556U160.01FLA
Current Unbalance Pre - Trip557U161%
Ground Current Pre - Trip558U161A
Hottest Stator RTD Owner During Trip563U161
Hottest Stator RTD During Trip564U161
Pre-Trip Temperature of Hottest Stator RTD565I161°C
Pre-Trip Voltage Vab566U161V
Pre-Trip Voltage Vbc567U161V
Pre-Trip Voltage Vca568U161V
Pre-Trip System Frequency572U160.01Hz
Pre-Trip Real Power573I161kW
Pre-Trip Reactive Power574I161kvar
Pre-Trip Apparent Power575U161kVA
Pre-Trip Power Factor576I160.01
General Spare Switch Alarm Status or Starter Monitor Alarm/Trip Status608U161
Overload Lockout Timer704U161min
Access720U161
Trip736U161
Phase A Current768U161A
Phase B Current770U161A
Phase C Current772U161A
Average Phase Current774U161A
Motor Load776U160.01× FLA
Current Unbalance777U161%
Unbalaced Biased Motor Load778U160.01× FLA
Ground Current779U161A
Overall Hottest Stator RTD Owner796U161N/A
Overall Hottest Stator RTD Number797U161N/A
Overall Hottest Stator RTD Temperature798I161°C
Local Hottest Stator RTD Number799U161-
Local Hottest Stator RTD Temperature800I161°C
Local RTD #1 Temperature801I161°C
Local RTD #2 Temperature802I161°C
Local RTD #3 Temperature803I161°C
Local RTD #4 Temperature804I161°C
Local RTD #5 Temperature805I161°C
Local RTD #6 Temperature806I161°C
Local RTD #7 Temperature807I161°C
Local RTD #8 Temperature808I161°C
Local RTD #9 Temperature809I161°C
Local RTD #10 Temperature810I161°C
Local RTD #11 Temperature811I161°C
Local RTD #12 Temperature812I161°C
Vab864U161V
Vbc865U161V
Vca866U161V
Average Line Voltage867U161V
Van868U161V
Vbn869U161V
Vcn870U161V
Average Phase Voltage871U161V
System Frequency872U160.01Hz
Backspin Frequency (a value of "0" represents 'low signal')873U160.01Hz
Backspin Detection State874U161-
Backspin Prediction Timer875U161s
Power Factor880I160.01-
Real Power881I161kW
Real Power883U161hp
Reactive Power884I161kvar
Apparent Power886U161kVA
Positive MegaWatthours887U161MWh
Positive Megavarhours889U161Mvarh
Negative Megavarhours891U161Mvarh
Positive KiloWatthours893U161kWh
Positive Kilovarhours895U161kvarh
Negative Kilovarhours897U161kvarh
Current Demand912U161A
Real Power Demand914U161kW
Reactive Power Demand916U161kvar
Apparent Power Demand918U161kVA
Peak Current Demand919U161A
Peak Real Power Demand921U161kW
Peak Reactive Power Demand923U161kvar
Peak Apparent Power Demand925U161kVA
Number of Motor Starts1136U161-
Number of Emergency Restarts1137U161-
Digital Counter1139U161-
Motor Running Hours1184U161hr.

link settings as documented (unverified): RTU; baud 1200/2400/4800/9600/19200; unit ID 254; FC 03,04,05,06,07,08,16; Modbus is a single master, multiple slave protocol. Up to 32 slaves can be daisy-chained together on a single communication channel.

bench facts as documented (unverified)
terminalsone of three 2-wire RS485 ports from the rear terminal connector, the RS232 from the front panel connector, a fibre optic connection
A/B polarityEach '+' terminal of every 369 must be connected together for the system to operate.
terminationThe terminating network should consist of a 120 ohm resistor in series with a 1 nF ceramic capacitor when used with Belden 9841 RS485 wire.
connectorrear terminal connector, front panel connector, RJ45 connector
shield/groundShielded wire should always be used to minimize noise.
max registers/read125
inter-frame delay3 ms
broadcastsupported
model register0x0000
serial register0x0020
firmware register0x0002
certificationsCE, UL, ISO9001:2000
doc revision3.4x
field reports — community-sourced, unverified (checked 2026-06-11)
  • confirmed: Baud rates [1200, 2400, 4800, 9600, 19200], default unit ID 254, RTU framing, and parity N with 1 stop bit — confirmed by GE Multilin 369 Communications Guide
  • confirmed: Identification registers (model_register @ 0x0000, firmware_register @ 0x0002, serial_register @ 0x0020) — confirmed by GE Multilin 369 Memory Map
  • confirmed: Register map summary (motor_status @ 512, motor_thermal_capacity_used @ 513, cause_of_last_trip @ 544, phase_a_current @ 768, local_rtd_1_temperature @ 801) — confirmed by GE Multilin 369 Memory Map

The trust ladder

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

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