Regin Corrigo/Exigo heating 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 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.

point	address (0-based)	type	scale	unit
outdoor_temp	1	I16	0.1	°C
heating_primary_supply_temp	358	I16	0.1	°C
heating_primary_return_temp	359	I16	0.1	°C
cooling_primary_supply_temp	360	I16	0.1	°C
cooling_primary_return_temp	361	I16	0.1	°C
supply_temp_hs1	2	I16	0.1	°C
outdoor_compensated_setpoint_supply_temp_hs1	3	I16	0.1	°C
room_temp_hs1	4	I16	0.1	°C
setpoint_room_temp_hs1	17	I16	0.1	°C
return_temp_hs1	5	I16	0.1	°C
control_signal_hs1_cv	153	I16	0.1	V
controller_output_hs1	160	I16	0.1	%
supply_temp_hs2	6	I16	0.1	°C
outdoor_compensated_setpoint_supply_temp_hs2	7	I16	0.1	°C
room_temp_hs2	8	I16	0.1	°C
return_temp_hs2	9	I16	0.1	°C
control_signal_hs2_cv	154	I16	0.1
controller_output_hs2	161	I16	0.1
supply_temp_hs3	10	I16	0.1	°C
outdoor_compensated_setpoint_supply_temp_hs3	11	I16	0.1	°C
room_temp_hs3	12	I16	0.1	°C
return_temp_hs3	13	I16	0.1	°C
control_signal_hs3_cv	155	I16	0.1
controller_output_hs3	162	I16	0.1
supply_temp_hwc1	14	I16	0.1	°C
setpoint_supply_hwc1	52	I16	0.1
control_signal_hw1_cv	156	I16	0.1
controller_output_hw1	163	I16	0.1
supply_temp_hwc2	15	I16	0.1	°C
setpoint_supply_hwc2	53	I16	0.1
control_signal_hwc2_cv	157	I16	0.1
controller_output_hwc2	164	I16	0.1
supply_temp_hp1	16	I16	0.1	°C
return_temp_hp1	17	I16	0.1	°C
boiler_temp	18	I16	0.1
boiler_return_temp	356	I16	0.1
boiler_supply_temp	394	I16	0.1
difference_pressure	19	I16	0.1
wind_speed	20	I16	0.1
energy_consumption_mwh	65	I16	0.1
water_consumption_m3	66	I16	0.1
power_usage_instant	27	I16	0.1
cold_water_1_consumption_m3	67	I16	0.1
cold_water_1_flow	30	I16	0.1
cold_water_2_consumption_m3	68	I16	0.1
cold_water_2_flow	36	I16	0.1
electric_consumption_mwh	69	I16	0.1
leakage_power	42	I16	0.1

link settings as documented (unverified): RTU; default 9600 8N1; unit ID 1; FC 01,02,03,04,05,06,15,16; Corrigo/Exigo uses the same port for communication via Modbus and via EXOline. The input port will automatically adapt itself after approx. 1 second and remain in EXO-mode until no communication has taken place for 10 seconds, after which it will revert to Modbus mode.

bench facts as documented (unverified)

wiring notes	For Modbus, the bottom layer can be RS485, RS422 or RS232.
max registers/read	47
inter-frame delay	16 ms
protocol notes	The Modbus master must wait for a minimum of 3.5 character times (4 ms at 9600 bps) between two messages. When communicating with more than one controller on the same RS485 line, the master must wait for a minimum of 14 character times (16 ms at 9600 bps) between the answer and the first question for the next controller. The controller is limited to 10 fast communications every 30 seconds; other communications will have a delayed answer time of approximately 1 second.
doc revision	Revision 14, January 2015
firmware applicability	From version 3.4

generated by gemini:gemini-3.5-flash · harvested from https://www.regincontrols.com/globalassets/pimmediafiles/documents/corrigo_exigo_heating_variables_for_exoline_modbus_and_bacnet_3.4_manu_en.pdf (Regin); manual-faithful — the document's claims, panel risk: ELEVATED — panel is not confident; 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.

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.
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.
simulator-verified — Decoded correctly against a protocol emulator seeded with known-true values — catches word-order/scaling errors vs the emulator, not the physical device.
hardware-verified x1 — Matched a real device with operator-attested readings as ground truth — the only rung that confirms word order + scaling on the wire.

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.