MBMap Registry
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  2. Microidea
  3. 1PH

Microidea 1PH Modbus register map

Digital power factor controller with 4, 6, 8 or 12 capacitor steps, Modbus RTU

  • Official
  • 147 registers
  • Revision 1 · 2026-10-18

Official: Written from the manufacturer's documentation, but not tested on a device yet. Check the map against the manufacturer's documentation before you write to a live device. Tested it? Report a test.

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Communication

Protocol
Modbus TCP and RTUdefault
Unit ID
1default
TCP port
502default
Serial
9600 8E1 · 9600 baud, 8 data bits, even parity, 1 stop bit defaults
Byte / word order
ABCD · bytes big-endian, words high first
Addresses
0-based

Connection values are defaults: the device may be configured differently.

Map

Registers
88 holding registers, 59 input registers
Groups
6
Revision
1 · 2026-10-18
Added
()
File
maps/microidea/1ph.mbmap.json · 37 KB · history
SHA-256
6f56d38a86a06a0ade63abf6137a8eeef3c4379954b1b2681c3bd3a9c515c9dc
Manufacturer
microidea.it

Sources and notes

Source: Microidea, "1PH - Digital Power Factor, Registers Modbus - RTU"; https://www.microidea.it/sites/default/files/pdf/MODBUS_TABLE_1PH.pdf

  • Digital power factor controller 1PH. Serial communication needs the optional PC-USB / RS485 / TTL module (order code SCUSB485).
  • The manual does not give the order of the two words of a 32-bit value, nor the factory serial settings or which Serial protocol type value is Modbus. Big word order is assumed; check it against the display.
  • Steps beyond the controller's step count (4, 6, 8 or 12) are not used; on a 4-step controller step 3 can be a fan output and step 4 an alarm contact, and likewise for 6, 8 and 12 steps.
  • The manual leaves the names of the bits in the alarm masks blank, so they are shown as plain numbers.
  • Temperatures are in the unit chosen by the Temperature scale register.
AreaAddressNameTypeAccessUnitScaleDescription
IR 0 uint16 R ×0.001 Actual cos phi, sent as cos x 1000
IR 1 uint16 R V RMS voltage
IR 2 uint32 ABCD R A ×0.01 RMS current
IR 4 int32 ABCD R var Actual reactive power; negative is capacitive
IR 6 int32 ABCD R var
IR 8 int32 ABCD R W
IR 10 uint16 R %
IR 11 uint16 R One bit per alarm, 1 = active
IR 11 bool bit 0 R
IR 11 bool bit 1 R
IR 11 bool bit 2 R
IR 11 bool bit 3 R
IR 11 bool bit 4 R
IR 11 bool bit 5 R
IR 11 bool bit 6 R
IR 11 bool bit 7 R
IR 11 bool bit 8 R
IR 11 bool bit 9 R
IR 12 uint16 R One bit per alarm, 1 = active; bit 5 is not used
IR 12 bool bit 0 R
IR 12 bool bit 1 R
IR 12 bool bit 2 R
IR 12 bool bit 3 R
IR 12 bool bit 4 R
IR 12 bool bit 6 R
IR 13 uint16 R Which steps are inserted; the manual does not give the bit order
IR 14 uint32 ABCD R var Reactive power the step really delivers
IR 16 uint32 ABCD R var Reactive power the step really delivers
IR 18 uint32 ABCD R var Reactive power the step really delivers
IR 20 uint32 ABCD R var Reactive power the step really delivers
IR 22 uint32 ABCD R var Reactive power the step really delivers
IR 24 uint32 ABCD R var Reactive power the step really delivers
IR 26 uint32 ABCD R var Reactive power the step really delivers
IR 28 uint32 ABCD R var Reactive power the step really delivers
IR 30 uint32 ABCD R var Reactive power the step really delivers
IR 32 uint32 ABCD R var Reactive power the step really delivers
IR 34 uint32 ABCD R var Reactive power the step really delivers
IR 36 uint32 ABCD R var Reactive power the step really delivers
IR 38 uint16 R °C ×0.1
IR 39 uint16 R 4, 6, 8 or 12
IR 40 uint16 R
IR 41 uint16 R
IR 42 uint16 R s Seconds left before the capacitor is discharged
IR 43 uint16 R s Seconds left before the capacitor is discharged
IR 44 uint16 R s Seconds left before the capacitor is discharged
IR 45 uint16 R s Seconds left before the capacitor is discharged
IR 46 uint16 R s Seconds left before the capacitor is discharged
IR 47 uint16 R s Seconds left before the capacitor is discharged
IR 48 uint16 R s Seconds left before the capacitor is discharged
IR 49 uint16 R s Seconds left before the capacitor is discharged
IR 50 uint16 R s Seconds left before the capacitor is discharged
IR 51 uint16 R s Seconds left before the capacitor is discharged
IR 52 uint16 R s Seconds left before the capacitor is discharged
IR 53 uint16 R s Seconds left before the capacitor is discharged
IR 54 uint32 ABCD R h Total hours of operation
IR 56 uint16 R V
IR 57 uint32 ABCD R A ×0.01
IR 59 uint16 R %
IR 60 uint16 R °C
HR 0 uint16 RW
HR 1 uint16 RW Steps to insert in manual mode: bit 0 = step 1 ... bit 11 = step 12
HR 1 bool bit 0 RW
HR 1 bool bit 1 RW
HR 1 bool bit 2 RW
HR 1 bool bit 3 RW
HR 1 bool bit 4 RW
HR 1 bool bit 5 RW
HR 1 bool bit 6 RW
HR 1 bool bit 7 RW
HR 1 bool bit 8 RW
HR 1 bool bit 9 RW
HR 1 bool bit 10 RW
HR 1 bool bit 11 RW
HR 2 int16 RW ×0.01 Target cos phi; negative is capacitive
HR 3 uint16 RW s/step
HR 4 uint16 RW A 0 or 5 to 10000
HR 5 uint16 RW var ×10 Limited range; use the 32-bit Minimum step register for the full value
HR 6 uint16 RW V
HR 7 uint16 RW s
HR 8 int32 ABCD RW var Step size
HR 10 int32 ABCD RW var Step size
HR 12 int32 ABCD RW var Step size. Also -1 = fan when the controller has 4 steps
HR 14 int32 ABCD RW var Step size. Also -1 = NCA and -2 = NOA when the controller has 4 steps
HR 16 int32 ABCD RW var Step size. Also -1 = fan when the controller has 6 steps
HR 18 int32 ABCD RW var Step size. Also -1 = NCA and -2 = NOA when the controller has 6 steps
HR 20 int32 ABCD RW var Step size. Also -1 = fan when the controller has 8 steps
HR 22 int32 ABCD RW var Step size. Also -1 = NCA and -2 = NOA when the controller has 8 steps
HR 24 int32 ABCD RW var Step size
HR 26 int32 ABCD RW var Step size
HR 28 int32 ABCD RW var Step size. Also -1 = fan when the controller has 12 steps
HR 30 int32 ABCD RW var Step size. Also -1 = NCA and -2 = NOA when the controller has 12 steps
HR 32 uint16 RW
HR 33 uint16 RW
HR 34 uint16 RW
HR 35 uint16 RW 0 = off, 1 to 247
HR 36 uint16 RW °C / °F 0 = disabled, 35 to 158 = enabled with this threshold
HR 37 uint16 RW
HR 38 uint16 RW %
HR 39 uint16 RW Alarms that drive the alarm relay, 1 = enabled; bits 0 to 9, bit 8 not used. The manual does not name the bits
HR 40 uint16 RW In the unit chosen by the alarm scale register

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