Delta DTM temperature 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.

point	address (0-based)	type	scale	unit
ch1_pv	616	I16	0.1	°C
ch2_pv	617	I16	0.1	°C
ch3_pv	618	I16	0.1	°C
ch4_pv	619	I16	0.1	°C
ch5_pv	620	I16	0.1	°C
ch6_pv	621	I16	0.1	°C
ch7_pv	622	I16	0.1	°C
ch8_pv	623	I16	0.1	°C
ch1_sv	624	I16	0.1
ch2_sv	625	I16	0.1
ch3_sv	626	I16	0.1
ch4_sv	627	I16	0.1
ch5_sv	628	I16	0.1
ch6_sv	629	I16	0.1
ch7_sv	630	I16	0.1
ch8_sv	631	I16	0.1
ch1_out1_power	632	U16	0.1
ch2_out1_power	633	U16	0.1
ch3_out1_power	634	U16	0.1
ch4_out1_power	635	U16	0.1
ch5_out1_power	636	U16	0.1
ch6_out1_power	637	U16	0.1
ch7_out1_power	638	U16	0.1
ch8_out1_power	639	U16	0.1
ch1_out2_power	640	U16	0.1
ch2_out2_power	641	U16	0.1
ch3_out2_power	642	U16	0.1
ch4_out2_power	643	U16	0.1
ch5_out2_power	644	U16	0.1
ch6_out2_power	645	U16	0.1
ch7_out2_power	646	U16	0.1
ch8_out2_power	647	U16	0.1
ch1_status	648	U16	1
ch2_status	649	U16	1
ch3_status	650	U16	1
ch4_status	651	U16	1
ch5_status	652	U16	1
ch6_status	653	U16	1
ch7_status	654	U16	1
ch8_status	655	U16	1
ch1_ct1_value	712	U16	0.1
ch2_ct1_value	713	U16	0.1
ch3_ct1_value	714	U16	0.1
ch4_ct1_value	715	U16	0.1
ch5_ct1_value	716	U16	0.1
ch6_ct1_value	717	U16	0.1
ch7_ct1_value	718	U16	0.1
ch8_ct1_value	719	U16	0.1
ch1_ct2_value	720	U16	0.1
ch2_ct2_value	721	U16	0.1
ch3_ct2_value	722	U16	0.1
ch4_ct2_value	723	U16	0.1
ch5_ct2_value	724	U16	0.1
ch6_ct2_value	725	U16	0.1
ch7_ct2_value	726	U16	0.1
ch8_ct2_value	727	U16	0.1

link settings as documented (unverified): RTU/ASCII/TCP; default 38400 8E1; unit ID 1; FC 03,06,16; Supports RS485, Ethernet (Modbus TCP), and USB (for configuration only, no signal isolation).

⚠ USB connection has no signal isolation and cannot be used for long-term monitoring. — Starkest reads only; we never write a control register.

bench facts as documented (unverified)

terminals	RS485 communications terminal, Power input terminal, Sensor input terminal
connector	RJ-45, Mini USB, RS485 terminal
isolation	Channels are completely isolated from each other. USB has no signal isolation.
wiring notes	Requires needle-type terminals with diameter < 2.35mm.
max registers/read	64
protocol notes	Initialization takes approximately 30 seconds after power on, during which external communications are unavailable.
identification notes	Model and serial registers not explicitly defined in the provided pages.
power	24V DC (90% ~ 110% of rated voltage). Host Max 6W + 5W * measurement modules + 3W * I/O modules.
environment	Operating temperature: 0°C to +50°C. Storage temperature: -20°C to +65°C. Operating humidity: 35% to 85% RH (no dew). Operating altitude: Below 2,000 meters. Pollution level: 2.
accuracy	Sampling frequency: 0.1 sec./all 8 inputs.
doc revision	V1.0 (2020/02/22)

⚠ disputed: default_unit_id: 1 — disputed by DTM Software Operating Manual v1.3, which states that when the host station number dial switch is set to 0 (the default 'All OFF' setting), the RS-485 station number address is 16 (DEC) / 10 (HEX).

field reports — community-sourced, unverified (checked 2026-06-11)

confirmed: Baud rates [4800, 9600, 19200, 38400, 57600, 115200] and default baud rate of 38400 — confirmed by DTM Temperature Controller Operating Manual V1.0
confirmed: Sampling frequency: 0.1 sec./all 8 inputs — confirmed by DTM Temperature Controller Operating Manual V1.0
confirmed: USB connection has no signal isolation and cannot be used for long-term monitoring — confirmed by DTM Temperature Controller Operating Manual V1.0
confirmed: Initialization takes approximately 30 seconds after power on, during which external communications are unavailable — confirmed by DTM Temperature Controller Operating Manual V1.0
confirmed: Requires needle-type terminals with diameter < 2.35mm — confirmed by DTM Temperature Controller Operating Manual V1.0
confirmed: Operating temperature: 0°C to +50°C, Storage temperature: -20°C to +65°C, Operating humidity: 35% to 85% RH, Operating altitude: < 2,000 m, Pollution level: 2 — confirmed by DTM Temperature Controller Operating Manual V1.0
confirmed: Register map addresses (PV starting at 616, SV starting at 624, OUT1 power starting at 632, OUT2 power starting at 640, Channel status starting at 648) — confirmed by DTM Software Operating Manual v1.3

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.

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.