verified connector library

RKC FB100/FB400/FB900 controller (needs C5/C6 comms option)

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 only confirmed at the hardware-verified rung.

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
measured_value_pv0I160.1
current_transformer_1_input_value_monitor1U160.1
current_transformer_2_input_value_monitor2U160.1
set_value_sv_monitor3I160.1
remote_setting_rs_input_value_monitor4I160.1
burnout_state_monitor5U161
burnout_state_monitor_of_feedback_resistance_input6U161
event_1_state_monitor7U161
event_2_state_monitor8U161
event_3_state_monitor9U161
event_4_state_monitor10U161
heater_break_alarm_1_state_monitor11U161
heater_break_alarm_2_state_monitor12U161
manipulated_output_value_mv1_monitor_heat_side13I160.1
manipulated_output_value_mv2_monitor_cool_side14I160.1
error_code15U161
digital_input_di_state_monitor16U161
output_state_monitor17U161
operation_mode_state_monitor18U161
memory_area_soak_time_monitor19U161s
integrated_operating_time_monitor20U161h
holding_peak_value_ambient_temperature_monitor21I160.1°C
power_feed_forward_input_value_monitor22U160.1%
pid_at_transfer32U161
auto_manual_transfer33U161
remote_local_transfer34U161
run_stop_transfer35U161
memory_area_transfer36U161
event_1_set_value38I160.1
event_2_set_value39I160.1
event_3_set_value40I160.1
event_4_set_value41I160.1
control_loop_break_alarm_lba_time42U161
lba_deadband43I160.1
set_value_sv44I160.1
proportional_band_heat_side45U160.1
integral_time_heat_side46U161
derivative_time_heat_side47U161
proportional_band_cool_side49U160.1
integral_time_cool_side50U161
derivative_time_cool_side51U161
overlap_deadband52I160.1°C
manual_reset53I160.1%
area_soak_time56U161s
heater_break_alarm_1_set_value58U160.1A
heater_break_alarm_2_set_value61U160.1A
pv_bias64I160.1°C
pv_digital_filter65U160.1s
pv_ratio66U160.001
pv_low_input_cut_off67U160.01%
rs_bias68I160.1
rs_digital_filter69U160.1s
rs_ratio70U160.001
manual_manipulated_output_value73I160.1%
input_scale_high85I160.1
input_scale_low86I160.1

link settings as documented (unverified): RTU; default 19200 8N1; unit ID 0; FC 03,06,08,16; Modbus protocol identifies the host computer as master, the controller as slave.

⚠ An external protection device must be installed if failure of this instrument could result in damage to the instrument, equipment or injury to personnel. — Starkest reads only; we never write a control register.

bench facts as documented (unverified)
terminalsFB100: 13 (SG), 14 (T/R A), 15 (T/R B). FB400/900: 25 (SG), 26 (T/R A), 27 (T/R B)
A/B polarityV(A) - V(B) >= 2V -> 0 (SPACE), V(A) - V(B) <= -2V -> 1 (MARK)
terminationExternally terminal connected (RS-485)
connectorScrew terminals (M3 x 7 with 5.8 x 5.8 square washer)
isolationReinforced insulation between input signal wires and power supply/load wires
shield/groundShielded twisted pair wire recommended
max registers/read125
inter-frame delay4 ms
broadcastnot supported
protocol notesCommands should be sent at time intervals of 30 bits after the master receives the response message.
doc revisionIMR01W04-E6

generated by gemini:gemini-3.5-flash · harvested from https://www.rkcinst.co.jp/english/downloads/8929/imr01w04e6/ (RKC Instrument); manual-faithful — the document's claims, panel risk: LOW — panel concurs, no field disagreements; proved interop-verified on 2026-06-10 · recorded 2026-06-10

The trust ladder

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

Have a device that isn't here? Upload its register map — generation is free, and the connector earns its rung by being proven, not claimed.

Need it proven on your own device? Hardware verification — if it doesn't verify, you don't pay.

Building a platform? License the verified library — machine-readable maps, firmware matrix, API access.