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Rooftop unit · Modbus register map

Daikin Applied Rebel / Rebel Applied rooftop (MicroTech 4 controller) Modbus register map

Updated 16 October 2026

Manufacturer

Daikin Applied

Model

Rebel / Rebel Applied rooftop (MicroTech 4 controller)

Equipment type

Rooftop unit

Registers

112 (35 writable)

Transport

Modbus RTU

Default unit ID

1

Default serial

38400 baud, 8N2

Documented addressing

1-based (subtract 1 for the wire address)

Also known as

DPSA, DPS, Rebel Applied, Rebel, MicroTech 4 rooftop, ED 19133-2

Source document

MicroTech Applied Rooftop Unit Controller Modbus Network Integration (ED 19133-2) · ED 19133-2 · rev. 2025-10

Daikin Applied Rebel / Rebel Applied rooftop (MicroTech 4 controller) Modbus registers

Address = 0-based wire address (the documented number is shown under it when it differs) · Order: ABCD = high word first, CDAB = low word first · Scale: engineering value = raw × scale.

• Holding registers112

Notes on this map

• Network settings (defaults 38400 bps, no parity, 2 stop bits, address 1) come from the companion manual IM 1374-1-1, Modbus RTU Communication Module for MicroTech 4 Rebel and Rebel Applied (Feb 2026): https://tahoeweb.daikinapplied.com/api/general/DownloadDocumentByName/media/IM%201374-1%20MicroTech%20Rebel%20Applied%20Modbus%20Comm%20Manual%200219.pdf
• The document marks writable registers 'W' and defines that as read-write; they are listed as RW.
• The document never defines 'x 10' / 'x 100' / 'x 1000'. The only reading consistent with its decimal ranges and defaults (for example '72°F x 10', '-45.6-121.1°C x 10') is raw = value x factor, so scales are 0.1 / 0.01 / 0.001.
• Units follow register 261 / the module's 'Unit Support' setting (default English). Units shown here are the English ones (°F, psi, in. w.c.); in Metric the same registers carry °C, kPa and Pa with the same multiplier.
• Signedness is not stated. A register is INT16 only when its published English or Metric range includes negative values (or an enum uses -1); every other register is UINT16. Each kept register's range was checked to fit its type after scaling in both unit systems.
• The network 'invalid' value for space/outdoor temperature inputs is printed as 621.8 °F / 327.7 °C x10; the raw number is not stated.
• Left out: every two-register value (energy and power totals 80-115, airflow setpoints 175-176 and 187-190, run-hour counters 191-236) because the document never states the word order for multi-register numbers.
• Left out: single-register airflows 29, 30 and 172 ('0-60000 cfm x 10' cannot fit in 16 bits), building static pressure 9 (x10 on a ±0.249 in. range is unclear), return fan DSP setpoint 134, exhaust plenum setpoint 135 and OAT 128 (no multiplier printed), and duplicate/unnamed rows (133, 169, 171, 178, 180, 182, 183, 258, 283-287, 292).
• Left out: air-quality sensors 31-38, circuit 3 points 63-73, generic I/O 300-349 (expansion module) and most configuration enums 353-376. Alarm number meanings (pp. 25-37) are not reproduced.
• Left out because the '% x 10' multiplier cannot be trusted: this revision shows a mechanical '%' -> '% x 10' edit (register 15 reads '0-100% x 10 x 10', notes read '100% x 10 outdoor air' and 'held at 0% x 10', an alarm text reads '5% x 10' and the ASCII appendix lists '% x 10' for character 37). Every percent register is therefore ambiguous between raw 0-100 and 0-1000: 10, 11, 15, 18, 25, 27, 125, 126, 144, 145, 149-153, 163, 165, 167, 168, 174 and 186.
• Left out: maximum purge time 184 ('0-300 Min x 10'), because the same edit also produced 'Min x 10' text (Unit State value 4 reads 'Min x 10DAT').
• Left out: filter pressure 21 (the table cell spans registers 21-23, and '0-1250 Pa x 100' cannot fit 16 bits in Metric) and building static pressure setpoint 137 ('-62.2-62.2 Pa x 1000' cannot fit a signed 16-bit register in Metric). Also not mapped: exhaust air plenum static pressure 24 and Remote Setpoint Source 270/271, power monitor reset 272.
• Unit State (260) value 4 is printed 'Min x 10DAT', an artefact of the same edit; it is listed with the printed text.
• The data-bits setting is not stated in ED 19133-2 or IM 1374-1, so it is left null.

Questions about the Daikin Applied Rebel / Rebel Applied rooftop (MicroTech 4 controller)

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Source: MicroTech Applied Rooftop Unit Controller Modbus Network Integration (ED 19133-2) · ED 19133-2 · rev. 2025-10. Register numbers, types, scaling and units are reproduced as published; descriptions are our own.