Difference between revisions of "Domekt Komfovent C4 Plus Modbus Registers"

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Line 195: Line 195:
| Year date, yyyy
| Year date, yyyy
| Ex. 2023
| Ex. 2023
|-
| 10009
| Read/write
| Integer
| 1..100
| Modbus ID, default 20
| Ex. 20
|-
|-
| 10007
| 10007
Line 216: Line 209:
| Alarm status (stop code)
| Alarm status (stop code)
| 3-Rotor stop, <br>4-Heater overheating, <br>9-Supply sensor B1, <br>19-Air temp. low, <br>20-Air temp. high, <br>27-Water temp. low, <br>28-Frost possibility
| 3-Rotor stop, <br>4-Heater overheating, <br>9-Supply sensor B1, <br>19-Air temp. low, <br>20-Air temp. high, <br>27-Water temp. low, <br>28-Frost possibility
|-
| 10009
| Read/write
| Integer
| 1..100
| Modbus ID, default 20
| Ex. 20
|-
| 10010
| Read/write
| -
| -
| Unkown
|
|-
| 10011
| Read
| -
| -
| Unkown
|
|-
|-
|}
|}
Line 223: Line 237:
{| border="0" cellspacing="0" cellpadding="1" class="wikitable"
{| border="0" cellspacing="0" cellpadding="1" class="wikitable"
|-
|-
| '''Modbus register'''
| '''Modbus register actual'''
| '''Actual register'''
| '''Type'''
| '''Type'''
| '''Access'''
| '''Access'''
Line 231: Line 244:
| '''Data values'''
| '''Data values'''
|-
|-
| 1100
| 10099
| 10099
| Read/write
| Read/write
Line 239: Line 251:
| 1-Low fan speed (60VAC), <br>2-Normal fan speed (recommended) (150VAC), <br>3-High fan speed (230VAC)
| 1-Low fan speed (60VAC), <br>2-Normal fan speed (recommended) (150VAC), <br>3-High fan speed (230VAC)
|-
|-
| 1101
| 10100
| 10100
| Read
| Read
Line 247: Line 258:
| 0-Standby, <br>1-Low fan speed, <br>2-Normal fan speed, <br>3-High fan speed, <br>4-Override mode
| 0-Standby, <br>1-Low fan speed, <br>2-Normal fan speed, <br>3-High fan speed, <br>4-Override mode
|-
|-
| 1102
| 10101
| 10101
| Read/write
| Read/write
Line 255: Line 265:
| 0-Manual (preset fan speed), 1-Auto (schedule)
| 0-Manual (preset fan speed), 1-Auto (schedule)
|-
|-
| 1103
| 10102
| 10102
| Read/write
| Read/write
Line 263: Line 272:
| 20 to 100% (EC-fan only)
| 20 to 100% (EC-fan only)
|-
|-
| 1104
| 10103
| 10103
| Read/write
| Read/write
Line 271: Line 279:
| 20 to 100% (EC-fan), 0 to 2 (AC-fan)
| 20 to 100% (EC-fan), 0 to 2 (AC-fan)
|-
|-
| 1105
| 10104
| 10104
| Read/write
| Read/write
Line 279: Line 286:
| 20 to 100% (EC-fan only)
| 20 to 100% (EC-fan only)
|-
|-
| 1106
| 10105
| 10105
| Read/write
| Read/write
Line 287: Line 293:
| 20 to 100% (EC-fan only)
| 20 to 100% (EC-fan only)
|-
|-
| 1107
| 10106
| 10106
| Read/write
| Read/write
Line 295: Line 300:
| 20 to 100% (EC-fan only)
| 20 to 100% (EC-fan only)
|-
|-
| 1108
| 10107
| 10107
| Read/write
| Read/write
Line 303: Line 307:
| 20 to 100% (EC-fan), 0 to 2 (AC-fan)
| 20 to 100% (EC-fan), 0 to 2 (AC-fan)
|-
|-
| 1109
| 10108
| 10108
| Read/write
| Read/write
Line 311: Line 314:
| 20 to 100% (EC-fan only)
| 20 to 100% (EC-fan only)
|-
|-
| 1110
| 10109
| 10109
| Read/write
| Read/write
Line 319: Line 321:
| 20 to 100% (EC-fan only)
| 20 to 100% (EC-fan only)
|-
|-
| 1111
| 10110
| 10110
| Read/write
| Read/write
Line 327: Line 328:
| 0-Disable, 1-Enable - DIP switch 4 set to ON will disable the exhaust fan, or OFF to leave both fans running  
| 0-Disable, 1-Enable - DIP switch 4 set to ON will disable the exhaust fan, or OFF to leave both fans running  
|-
|-
| 1112
| 10111
| 10111
| Read/write
| Read/write
Line 335: Line 335:
| 1 to 90 minutes
| 1 to 90 minutes
|-
|-
| 1113
| 10112
| 10112
| Read
| Read
Line 342: Line 341:
| Override timer count down
| Override timer count down
| 0 to 90 minutes
| 0 to 90 minutes
|-
| 1114
| 10113
| Read
| Binary
| 0..1
| AHU (Air Handling Unit) fans status
| 0-Stopped, 1-Operating
|-
| 1115
| 10114
| Read
| Integer
| 0..100
| Supply fan level (current level)
| 0 to 100%
|-
| 1116
| 10115
| Read
| Integer
| 0..100
| Exhaust fan level (current level)
| 0 to 100%
|-
|-
|}
|}
Line 373: Line 348:
{| border="0" cellspacing="0" cellpadding="1" class="wikitable"
{| border="0" cellspacing="0" cellpadding="1" class="wikitable"
|-
|-
| '''Modbus register'''
| '''Modbus register actual'''
| '''Actual register'''
| '''Type'''
| '''Type'''
| '''Access'''
| '''Access'''
Line 381: Line 355:
| '''Data values'''
| '''Data values'''
|-
|-
| 1200
| 10299
| 10299
| Read
| Read
Line 389: Line 362:
| -30 to 75C, 10x C, ex. 250 => 25.0C
| -30 to 75C, 10x C, ex. 250 => 25.0C
|-
|-
| 1201
| 10300
| 10300
| Read/write
| Read/write
Line 397: Line 369:
| 0 to 30C, 10x C, ex. 25.0C => 250
| 0 to 30C, 10x C, ex. 25.0C => 250
|-
|-
| 1202
| 10301
| 10301
| Read/write
| Read/write
Line 405: Line 376:
| -90 to +90C, 10x C, ex. +4.5C => 45
| -90 to +90C, 10x C, ex. +4.5C => 45
|-
|-
| 1203
| 10302
| 10302
| Read/write
| Read/write
Line 413: Line 383:
| Ex. 08:05 => 0x0805
| Ex. 08:05 => 0x0805
|-
|-
| 1204
| 10303
| 10303
| Read/write
| Read/write
| 2x Char/Int8
| 2x Char/Int8
| 0x0000..0x183B
| 0x0000..0x183B
| Temperature correction end time
| Temperature correction stop time
| Ex. 15:05 => 0x0F05 (15=0x0F, 05=0x05)
| Ex. 15:05 => 0x0F05 (15=0x0F, 05=0x05)
|-
|-
| 1205
| 10304
| 10304
| Read
| Read
Line 435: Line 403:
{| border="0" cellspacing="0" cellpadding="1" class="wikitable"
{| border="0" cellspacing="0" cellpadding="1" class="wikitable"
|-
|-
| '''Modbus register'''
| '''Modbus register actual'''
| '''Actual register'''
| '''Type'''
| '''Type'''
| '''Access'''
| '''Access'''
Line 443: Line 410:
| '''Data values'''
| '''Data values'''
|-
|-
| 1300
| 10199
| 10199
| Read/write
| Read/write
Line 451: Line 417:
| Ex. 08:05 => 0x0805
| Ex. 08:05 => 0x0805
|-
|-
| 1301
| 10200
| 10200
| Read/write
| Read/write
Line 459: Line 424:
| Ex. 15:05 => 0x0F05
| Ex. 15:05 => 0x0F05
|-
|-
| 1302
| 10201
| 10201
| Read/write
| Read/write
Line 467: Line 431:
| Ex. 08:05 => 0x0805
| Ex. 08:05 => 0x0805
|-
|-
| 1303
| 10202
| 10202
| Read/write
| Read/write
Line 475: Line 438:
| Ex. 15:05 => 0x0F05
| Ex. 15:05 => 0x0F05
|-
|-
| 1304
| 10203
| 10203
| Read/write
| Read/write
Line 483: Line 445:
| Ex. 08:05 => 0x0805
| Ex. 08:05 => 0x0805
|-
|-
| 1305
| 10204
| 10204
| Read/write
| Read/write
Line 491: Line 452:
| Ex. 15:05 => 0x0F05
| Ex. 15:05 => 0x0F05
|-
|-
| 1306
| 10205
| 10205
| Read/write
| Read/write
Line 499: Line 459:
| Ex. 08:05 => 0x0805
| Ex. 08:05 => 0x0805
|-
|-
| 1307
| 10206
| 10206
| Read/write
| Read/write
Line 507: Line 466:
| Ex. 15:05 => 0x0F05
| Ex. 15:05 => 0x0F05
|-
|-
| 1308
| 10207
| 10207
| Read/write
| Read/write
Line 515: Line 473:
| Ex. 08:05 => 0x0805
| Ex. 08:05 => 0x0805
|-
|-
| 1309
| 10208
| 10208
| Read/write
| Read/write
Line 523: Line 480:
| Ex. 15:05 => 0x0F05
| Ex. 15:05 => 0x0F05
|-
|-
| 1310
| 10209
| 10209
| Read/write
| Read/write
Line 531: Line 487:
| Ex. 08:05 => 0x0805
| Ex. 08:05 => 0x0805
|-
|-
| 1311
| 10210
| 10210
| Read/write
| Read/write
Line 539: Line 494:
| Ex. 15:05 => 0x0F05
| Ex. 15:05 => 0x0F05
|-
|-
| 1312
| 10211
| 10211
| Read/write
| Read/write
Line 547: Line 501:
| Ex. 08:05 => 0x0805
| Ex. 08:05 => 0x0805
|-
|-
| 1313
| 10212
| 10212
| Read/write
| Read/write
Line 555: Line 508:
| Ex. 15:05 => 0x0F05
| Ex. 15:05 => 0x0F05
|-
|-
| 1314
| 10213
| 10213
| Read/write
| Read/write
Line 563: Line 515:
| Ex. 08:05 => 0x0805
| Ex. 08:05 => 0x0805
|-
|-
| 1315
| 10214
| 10214
| Read/write
| Read/write
Line 571: Line 522:
| Ex. 15:05 => 0x0F05
| Ex. 15:05 => 0x0F05
|-
|-
| 1316
| 10215
| 10215
| Read/write
| Read/write
Line 579: Line 529:
| Ex. 08:05 => 0x0805
| Ex. 08:05 => 0x0805
|-
|-
| 1317
| 10216
| 10216
| Read/write
| Read/write
Line 587: Line 536:
| Ex. 15:05 => 0x0F05
| Ex. 15:05 => 0x0F05
|-
|-
| 1318
| 10217
| 10217
| Read/write
| Read/write
Line 595: Line 543:
| Ex. 08:05 => 0x0805
| Ex. 08:05 => 0x0805
|-
|-
| 1319
| 10218
| 10218
| Read/write
| Read/write
Line 603: Line 550:
| Ex. 15:05 => 0x0F05
| Ex. 15:05 => 0x0F05
|-
|-
| 1320
| 10219
| 10219
| Read/write
| Read/write
Line 611: Line 557:
| Ex. 08:05 => 0x0805
| Ex. 08:05 => 0x0805
|-
|-
| 1321
| 10220
| 10220
| Read/write
| Read/write
Line 619: Line 564:
| Ex. 15:05 => 0x0F05
| Ex. 15:05 => 0x0F05
|-
|-
| 1322
| 10221
| 10221
| Read/write
| Read/write
Line 627: Line 571:
| Ex. 08:05 => 0x0805
| Ex. 08:05 => 0x0805
|-
|-
| 1323
| 10222
| 10222
| Read/write
| Read/write
Line 635: Line 578:
| Ex. 15:05 => 0x0F05
| Ex. 15:05 => 0x0F05
|-
|-
| 1324
| 10223
| 10223
| Read/write
| Read/write
Line 643: Line 585:
| Ex. 08:05 => 0x0805
| Ex. 08:05 => 0x0805
|-
|-
| 1325
| 10224
| 10224
| Read/write
| Read/write
Line 651: Line 592:
| Ex. 15:05 => 0x0F05
| Ex. 15:05 => 0x0F05
|-
|-
| 1326
| 10225
| 10225
| Read/write
| Read/write
Line 659: Line 599:
| Ex. 08:05 => 0x0805
| Ex. 08:05 => 0x0805
|-
|-
| 1327
| 10226
| 10226
| Read/write
| Read/write
Line 667: Line 606:
| Ex. 15:05 => 0x0F05
| Ex. 15:05 => 0x0F05
|-
|-
| 1328
| 10227
| 10227
| Read/write
| Read/write
Line 675: Line 613:
| Ex. 08:05 => 0x0805
| Ex. 08:05 => 0x0805
|-
|-
| 1329
| 10228
| 10228
| Read/write
| Read/write
Line 683: Line 620:
| Ex. 15:05 => 0x0F05
| Ex. 15:05 => 0x0F05
|-
|-
| 1330
| 10229
| 10229
| Read/write
| Read/write
Line 691: Line 627:
| Ex. 08:05 => 0x0805
| Ex. 08:05 => 0x0805
|-
|-
| 1331
| 10230
| 10230
| Read/write
| Read/write
Line 699: Line 634:
| Ex. 15:05 => 0x0F05
| Ex. 15:05 => 0x0F05
|-
|-
| 1332
| 10231
| 10231
| Read/write
| Read/write
Line 707: Line 641:
| Ex. 08:05 => 0x0805
| Ex. 08:05 => 0x0805
|-
|-
| 1333
| 10232
| 10232
| Read/write
| Read/write
Line 715: Line 648:
| Ex. 15:05 => 0x0F05
| Ex. 15:05 => 0x0F05
|-
|-
| 1334
| 10233
| 10233
| Read/write
| Read/write
Line 723: Line 655:
| Ex. 08:05 => 0x0805
| Ex. 08:05 => 0x0805
|-
|-
| 1335
| 10234
| 10234
| Read/write
| Read/write
Line 731: Line 662:
| Ex. 15:05 => 0x0F05
| Ex. 15:05 => 0x0F05
|-
|-
| 1336
| 10235
| 10235
| Read/write
| Read/write
Line 739: Line 669:
| Ex. 08:05 => 0x0805
| Ex. 08:05 => 0x0805
|-
|-
| 1337
| 10236
| 10236
| Read/write
| Read/write
Line 747: Line 676:
| Ex. 15:05 => 0x0F05
| Ex. 15:05 => 0x0F05
|-
|-
| 1338
| 10237
| 10237
| Read/write
| Read/write
Line 755: Line 683:
| Ex. 08:05 => 0x0805
| Ex. 08:05 => 0x0805
|-
|-
| 1339
| 10238
| 10238
| Read/write
| Read/write
Line 763: Line 690:
| Ex. 15:05 => 0x0F05
| Ex. 15:05 => 0x0F05
|-
|-
| 1340
| 10239
| 10239
| Read/write
| Read/write
Line 771: Line 697:
| Ex. 08:05 => 0x0805
| Ex. 08:05 => 0x0805
|-
|-
| 1341
| 10240
| 10240
| Read/write
| Read/write
Line 779: Line 704:
| Ex. 15:05 => 0x0F05
| Ex. 15:05 => 0x0F05
|-
|-
| 1342
| 10241
| 10241
| Read/write
| Read/write
Line 787: Line 711:
| 0-Standby, 1-Low, 2-Normal, 3-High
| 0-Standby, 1-Low, 2-Normal, 3-High
|-
|-
| 1343
| 10242
| 10242
| Read/write
| Read/write
Line 795: Line 718:
| 0 to 3
| 0 to 3
|-
|-
| 1344
| 10243
| 10243
| Read/write
| Read/write
Line 803: Line 725:
| 0 to 3
| 0 to 3
|-
|-
| 1345
| 10244
| 10244
| Read/write
| Read/write
Line 811: Line 732:
| 0-Standby, 1-Low, 2-Normal, 3-High
| 0-Standby, 1-Low, 2-Normal, 3-High
|-
|-
| 1346
| 10245
| 10245
| Read/write
| Read/write
Line 819: Line 739:
| 0 to 3
| 0 to 3
|-
|-
| 1347
| 10246
| 10246
| Read/write
| Read/write
Line 827: Line 746:
| 0 to 3
| 0 to 3
|-
|-
| 1348
| 10247
| 10247
| Read/write
| Read/write
Line 835: Line 753:
| 0-Standby, 1-Low, 2-Normal, 3-High
| 0-Standby, 1-Low, 2-Normal, 3-High
|-
|-
| 1349
| 10248
| 10248
| Read/write
| Read/write
Line 843: Line 760:
| 0 to 3
| 0 to 3
|-
|-
| 1350
| 10249
| 10249
| Read/write
| Read/write
Line 851: Line 767:
| 0 to 3
| 0 to 3
|-
|-
| 1351
| 10250
| 10250
| Read/write
| Read/write
Line 859: Line 774:
| 0-Standby, 1-Low, 2-Normal, 3-High
| 0-Standby, 1-Low, 2-Normal, 3-High
|-
|-
| 1352
| 10251
| 10251
| Read/write
| Read/write
Line 867: Line 781:
| 0 to 3
| 0 to 3
|-
|-
| 1353
| 10252
| 10252
| Read/write
| Read/write
Line 875: Line 788:
| 0 to 3
| 0 to 3
|-
|-
| 1354
| 10253
| 10253
| Read/write
| Read/write
Line 883: Line 795:
| 0-Standby, 1-Low, 2-Normal, 3-High
| 0-Standby, 1-Low, 2-Normal, 3-High
|-
|-
| 1355
| 10254
| 10254
| Read/write
| Read/write
Line 891: Line 802:
| 0 to 3
| 0 to 3
|-
|-
| 1356
| 10255
| 10255
| Read/write
| Read/write
Line 899: Line 809:
| 0 to 3
| 0 to 3
|-
|-
| 1357
| 10256
| 10256
| Read/write
| Read/write
Line 907: Line 816:
| 0-Standby, 1-Low, 2-Normal, 3-High
| 0-Standby, 1-Low, 2-Normal, 3-High
|-
|-
| 1358
| 10257
| 10257
| Read/write
| Read/write
Line 915: Line 823:
| 0 to 3
| 0 to 3
|-
|-
| 1359
| 10258
| 10258
| Read/write
| Read/write
Line 923: Line 830:
| 0 to 3
| 0 to 3
|-
|-
| 1360
| 10259
| 10259
| Read/write
| Read/write
Line 931: Line 837:
| 0-Standby, 1-Low, 2-Normal, 3-High
| 0-Standby, 1-Low, 2-Normal, 3-High
|-
|-
| 1361
| 10260
| 10260
| Read/write
| Read/write
Line 939: Line 844:
| 0 to 3
| 0 to 3
|-
|-
| 1362
| 10261
| 10261
| Read/write
| Read/write
Line 946: Line 850:
| Sun3 ventilation level (fan speed)
| Sun3 ventilation level (fan speed)
| 0 to 3
| 0 to 3
|-
|}
== Operation overview ==
{| border="0" cellspacing="0" cellpadding="1" class="wikitable"
|-
| '''Modbus register actual'''
| '''Type'''
| '''Access'''
| '''Range'''
| '''Description'''
| '''Data values'''
|-
|-
| 10113
| Read
| Binary
| 0..1
| AHU (Air Handling Unit) fans status
| 0-Stopped, 1-Operating
|-
| 10114
| Read
| Integer
| 0..100
| Supply fan level (current level)
| 0 to 100%
|-
| 10115
| Read
| Integer
| 0..100
| Exhaust fan level (current level)
| 0 to 100%
|-
| 10009
| Read
| Integer
| 0..100
| Recuperation level (rotating heat exchanger, DIP switch 1 set to ON - not adjustable directly only through setpoint temperature)
| 0 to 100%
|-
| 10010
| Read
| Integer
| 0..100
| Electric heater level (heating element, DIP switch 2 set to OFF)
| 0 to 100%
|-
| 10011
| Read
| Integer
| 0..100
| Water heating level (external, if installed, DIP switch 2 set to ON)
| 0 to 100%
|-
| 10012
| Read
| Integer
| 0..100
| Water cooling level (external, if installed, DIP switch 2 set to ON)
| 0 to 100%
|-
|-
|}
|}

Revision as of 11:50, 13 July 2023

Komfovent 200ve wiring diagram.png

Domekt Komfovent C4 is a AHU (Air Handling Unit) for use in a balanced HVAC system. The C4 is an older standard use from approx. 2011 to 2016.

If you have a unit without a control panel or want to interface the unit with an external automation. ex. Home Assistant, the following data will make that possible.

To make sure the unit works at all, jump the FC-wires together and the unit should start spinning at max. after three seconds. This confirms that the MCU works as expected.

Tools

To manually interface with the unit over Modbus, I would recommend trying the trail version of Modbus Poll. You will have a complete control interface and can easily send queries and receive responses from the unit.

Later you can use Home Assistant to build an entire control panel, better than what is provided by the OEM.

Connection

Connect the unit to a computer using the provided RS485/ModBus cable extruding from the top. There is no need to add 820 Ohm 5V pull-up/gnd pull-down or 120 Ohm termination. It works fine as is.

Komfovent c4 pinout.png

The pin-out is as the following:

RJ-45 flat cable Wire color Function
Pin 1 - Not used
Pin 2 - Not used
Pin 3 Red +24VDC
Pin 4 Yellow RS485 A+
Pin 5 Green RS485 B-
Pin 6 White Gnd
Pin 7 - Not used
Pin 8 - Not used

Modbus settings

Domekt c4 plus dip switches.png

To establish a working connection, it's important to match the following connection parameters. A single wrong setting will make the connection not work at all.

Bits per second/baudrate 19200
Data bits/word length 8
Parity Even
Stop bits 1

It is also important to use the correct Modbus ID. It's the identifier on the bus and has to be correct in order for communication to happen with the AHU.

The C4 unit has a different Modbus ID than later models, so make sure to double check. Either of the following will work with only one unit on the Modbus line.

Modbus ID 20 (specific C4 identification address)
254 (common identification address)

Register list

The C4 unit uses the following Modbus data register functions to read and write data.

A CR2032 battery keeps the registers concurrent when the unit is unplugged, ex. the time and date. Needs replacing after 8 years.

The unit will respond 01 Illegal register or 01 Illegal data register if you are trying to access something that does not exist. If you receive Timeout responses, make sure you use Modbus ID 20, cabling is correct, and the unit is plugged into the mains.

Description Modbus protocol Function description Unit properties
Read data Function code 03 Read Holding Registers / analog output holding registers Operation status, temperatures, fans speed, and etc.
Write data single register Function code 06 Preset Single Register / analog output holding register Turn on/off unit, set temperature, change auto/manual mode
Write multiple data registers Function code 16 Preset Multiple Registers / two analog output holding registers Set multiple individual registers at once, same as 06

Controller registers available on the C4 unit. When manually inquiring the unit, use the actual register address. This is because Domekt offsets the register address by add 9000 and subtract -1, ex. register address 1000 => 99999.

  • EC = Stepper type fan motor, digitally controlled - DIP switch 3 set to ON
  • AC = Regular alternating current type motor, transformer controlled - DIP switch 3 set to OFF

General settings and status

Modbus register actual Type Access Range Description Data values
99999 Read/write Integer 0..1 Operation start/stop 1-Start, 0-Stop
10000 Read/write Integer 0..1 Season (heating permitted or prohibited) 1-Winter, 0-Summer (air heating off)
10001 Read Integer 11..14 Alarm status (warnings) 14-Service, 13-Heater off, 11-Rotor stop
10002 Read Binary 0x0..0xF [b3-b0, 0..1]
Ex. 0x01=>64=>00000001
b0=1, rotating heat exchanger 		DIP switch status b0-Heat exchange type,
b1-Heater type,
b2-Fan type,
b3-OVR-mode
(1-On, 0-Off)
10003 Read/write 2x Char/Int8 0x0000..0x183B Time, hhmm Ex. 8:05 => 0x0805, 18:30 => 0x121E (18=0x12, 30=0x1E)
10004 Read/write Integer 1-7 Day of the week 1-Mon, 2-Tue, 3-Wed, 4-Thu, 5-Fri, 6-Sat, 7-Sun
10005 Read/write 2x Char/Int8 0x0101..0x0C1F Month-day date, mmdd Ex. 9th May => 0x0509, 31th Sept => 0x091F (Sept=0x09, 31=0x1F)
10006 Read/write Integer 1900-2100 Year date, yyyy Ex. 2023
10007 Read Binary 0x00..0x7F [b7-b0, 0..1]
Ex. 0x40=>64=>00000010
b1=1, supply sensor B1 fault 		Alarm status (stop flags) b1-Supply sensor B1,
b2-Heater overheating,
b3-Water temp. low,
b4-Rotor stop,
b5-Frost possibility,
b6-Air temp. high,
b7-Air temp. low
(1-Fault, 0-None)
10008 Read Integer 3..28 Alarm status (stop code) 3-Rotor stop,
4-Heater overheating,
9-Supply sensor B1,
19-Air temp. low,
20-Air temp. high,
27-Water temp. low,
28-Frost possibility
10009 Read/write Integer 1..100 Modbus ID, default 20 Ex. 20
10010 Read/write - - Unkown
10011 Read - - Unkown

Ventilation settings and status

Modbus register actual Type Access Range Description Data values
10099 Read/write Integer 1..3 Ventilation intensity level (manual mode) 1-Low fan speed (60VAC),
2-Normal fan speed (recommended) (150VAC),
3-High fan speed (230VAC)
10100 Read Integer 0..4 Ventilation intensity level current 0-Standby,
1-Low fan speed,
2-Normal fan speed,
3-High fan speed,
4-Override mode
10101 Read/write Integer 0..1 Control mode (Auto/Manual) (no Comfort or Economy mode available) 0-Manual (preset fan speed), 1-Auto (schedule)
10102 Read/write Integer 20..100 / 0 Supply ventilation intensity level 1 (EC-type fan) 20 to 100% (EC-fan only)
10103 Read/write Integer 20..100 / 0..2 Supply ventilation intensity level 2 (EC-type fan / AC-type fan) 20 to 100% (EC-fan), 0 to 2 (AC-fan)
10104 Read/write Integer 20..100 / 0 Supply ventilation intensity level 3 (EC-type fan) 20 to 100% (EC-fan only)
10105 Read/write Integer 20..100 / 0 Supply ventilation intensity level 4 (EC-type fan) 20 to 100% (EC-fan only)
10106 Read/write Integer 20..100 / 0 Exhaust ventilation intensity level 1 (EC-type fan) 20 to 100% (EC-fan only)
10107 Read/write Integer 20..100 / 0..2 Exhaust ventilation intensity level 2 (EC-type fan / AC-type fan) 20 to 100% (EC-fan), 0 to 2 (AC-fan)
10108 Read/write Integer 20..100 / 0 Exhaust ventilation intensity level 3 (EC-type fan) 20 to 100% (EC-fan only)
10109 Read/write Integer 20..100 / 0 Exhaust ventilation intensity level 4 (EC-type fan) 20 to 100% (EC-fan only)
10110 Read/write Integer 0..1 Override/"OVR"-mode, enables fan intensity level 4 (maximum) for a set time period 0-Disable, 1-Enable - DIP switch 4 set to ON will disable the exhaust fan, or OFF to leave both fans running
10111 Read/write Integer 1..90 Override mode timer duration 1 to 90 minutes
10112 Read Integer 0..90 Override timer count down 0 to 90 minutes

Temperature settings and status

Modbus register actual Type Access Range Description Data values
10299 Read Integer -300..750 Supply air temperature, C (after heat exchanger and heater element, to rooms) -30 to 75C, 10x C, ex. 250 => 25.0C
10300 Read/write Integer 0..300 Supply set point temperature, C (for calculation of recuperation, heating levels) 0 to 30C, 10x C, ex. 25.0C => 250
10301 Read/write Integer 0..300 Temperature correction, C (time based, lower or raise temperature in a set period) -90 to +90C, 10x C, ex. +4.5C => 45
10302 Read/write 2x Char/Int8 0x0000..0x183B Temperature correction start time Ex. 08:05 => 0x0805
10303 Read/write 2x Char/Int8 0x0000..0x183B Temperature correction stop time Ex. 15:05 => 0x0F05 (15=0x0F, 05=0x05)
10304 Read Integer -100..1100 Water temperature, C (external, if installed, DIP switch 2 set to ON) -10 to 110C, 10x C, ex. 320 => 32.0C

Schedule settings

Modbus register actual Type Access Range Description Data values
10199 Read/write 2x Char/Int8 0x0000..0x183B Mon1 start time Ex. 08:05 => 0x0805
10200 Read/write 2x Char/Int8 0x0000..0x183B Mon1 stop time Ex. 15:05 => 0x0F05
10201 Read/write 2x Char/Int8 0x0000..0x183B Mon2 start time Ex. 08:05 => 0x0805
10202 Read/write 2x Char/Int8 0x0000..0x183B Mon2 stop time Ex. 15:05 => 0x0F05
10203 Read/write 2x Char/Int8 0x0000..0x183B Mon3 start time Ex. 08:05 => 0x0805
10204 Read/write 2x Char/Int8 0x0000..0x183B Mon3 stop time Ex. 15:05 => 0x0F05
10205 Read/write 2x Char/Int8 0x0000..0x183B Tue1 start time Ex. 08:05 => 0x0805
10206 Read/write 2x Char/Int8 0x0000..0x183B Tue1 stop time Ex. 15:05 => 0x0F05
10207 Read/write 2x Char/Int8 0x0000..0x183B Tue2 start time Ex. 08:05 => 0x0805
10208 Read/write 2x Char/Int8 0x0000..0x183B Tue2 stop time Ex. 15:05 => 0x0F05
10209 Read/write 2x Char/Int8 0x0000..0x183B Tue3 start time Ex. 08:05 => 0x0805
10210 Read/write 2x Char/Int8 0x0000..0x183B Tue3 stop time Ex. 15:05 => 0x0F05
10211 Read/write 2x Char/Int8 0x0000..0x183B Wed1 start time Ex. 08:05 => 0x0805
10212 Read/write 2x Char/Int8 0x0000..0x183B Wed1 stop time Ex. 15:05 => 0x0F05
10213 Read/write 2x Char/Int8 0x0000..0x183B Wed2 start time Ex. 08:05 => 0x0805
10214 Read/write 2x Char/Int8 0x0000..0x183B Wed2 stop time Ex. 15:05 => 0x0F05
10215 Read/write 2x Char/Int8 0x0000..0x183B Wed3 start time Ex. 08:05 => 0x0805
10216 Read/write 2x Char/Int8 0x0000..0x183B Wed3 stop time Ex. 15:05 => 0x0F05
10217 Read/write 2x Char/Int8 0x0000..0x183B Thu1 start time Ex. 08:05 => 0x0805
10218 Read/write 2x Char/Int8 0x0000..0x183B Thu1 stop time Ex. 15:05 => 0x0F05
10219 Read/write 2x Char/Int8 0x0000..0x183B Thu2 start time Ex. 08:05 => 0x0805
10220 Read/write 2x Char/Int8 0x0000..0x183B Thu2 stop time Ex. 15:05 => 0x0F05
10221 Read/write 2x Char/Int8 0x0000..0x183B Thu3 start time Ex. 08:05 => 0x0805
10222 Read/write 2x Char/Int8 0x0000..0x183B Thu3 stop time Ex. 15:05 => 0x0F05
10223 Read/write 2x Char/Int8 0x0000..0x183B Fri1 start time Ex. 08:05 => 0x0805
10224 Read/write 2x Char/Int8 0x0000..0x183B Fri1 stop time Ex. 15:05 => 0x0F05
10225 Read/write 2x Char/Int8 0x0000..0x183B Fri2 start time Ex. 08:05 => 0x0805
10226 Read/write 2x Char/Int8 0x0000..0x183B Fri2 stop time Ex. 15:05 => 0x0F05
10227 Read/write 2x Char/Int8 0x0000..0x183B Fri3 start time Ex. 08:05 => 0x0805
10228 Read/write 2x Char/Int8 0x0000..0x183B Fri3 stop time Ex. 15:05 => 0x0F05
10229 Read/write 2x Char/Int8 0x0000..0x183B Sat1 start time Ex. 08:05 => 0x0805
10230 Read/write 2x Char/Int8 0x0000..0x183B Sat1 stop time Ex. 15:05 => 0x0F05
10231 Read/write 2x Char/Int8 0x0000..0x183B Sat2 start time Ex. 08:05 => 0x0805
10232 Read/write 2x Char/Int8 0x0000..0x183B Sat2 stop time Ex. 15:05 => 0x0F05
10233 Read/write 2x Char/Int8 0x0000..0x183B Sat3 start time Ex. 08:05 => 0x0805
10234 Read/write 2x Char/Int8 0x0000..0x183B Sat3 stop time Ex. 15:05 => 0x0F05
10235 Read/write 2x Char/Int8 0x0000..0x183B Sun1 start time Ex. 08:05 => 0x0805
10236 Read/write 2x Char/Int8 0x0000..0x183B Sun1 stop time Ex. 15:05 => 0x0F05
10237 Read/write 2x Char/Int8 0x0000..0x183B Sun2 start time Ex. 08:05 => 0x0805
10238 Read/write 2x Char/Int8 0x0000..0x183B Sun2 stop time Ex. 15:05 => 0x0F05
10239 Read/write 2x Char/Int8 0x0000..0x183B Sun3 start time Ex. 08:05 => 0x0805
10240 Read/write 2x Char/Int8 0x0000..0x183B Sun3 stop time Ex. 15:05 => 0x0F05
10241 Read/write Integer 0..3 Mon1 ventilation level (fan speed) 0-Standby, 1-Low, 2-Normal, 3-High
10242 Read/write Integer 0..3 Mon2 ventilation level (fan speed) 0 to 3
10243 Read/write Integer 0..3 Mon3 ventilation level (fan speed) 0 to 3
10244 Read/write Integer 0..3 Tue1 ventilation level (fan speed) 0-Standby, 1-Low, 2-Normal, 3-High
10245 Read/write Integer 0..3 Tue2 ventilation level (fan speed) 0 to 3
10246 Read/write Integer 0..3 Tue3 ventilation level (fan speed) 0 to 3
10247 Read/write Integer 0..3 Wed1 ventilation level (fan speed) 0-Standby, 1-Low, 2-Normal, 3-High
10248 Read/write Integer 0..3 Wed2 ventilation level (fan speed) 0 to 3
10249 Read/write Integer 0..3 Wed3 ventilation level (fan speed) 0 to 3
10250 Read/write Integer 0..3 Thu1 ventilation level (fan speed) 0-Standby, 1-Low, 2-Normal, 3-High
10251 Read/write Integer 0..3 Thu2 ventilation level (fan speed) 0 to 3
10252 Read/write Integer 0..3 Thu3 ventilation level (fan speed) 0 to 3
10253 Read/write Integer 0..3 Fri1 ventilation level (fan speed) 0-Standby, 1-Low, 2-Normal, 3-High
10254 Read/write Integer 0..3 Fri2 ventilation level (fan speed) 0 to 3
10255 Read/write Integer 0..3 Fri3 ventilation level (fan speed) 0 to 3
10256 Read/write Integer 0..3 Sat1 ventilation level (fan speed) 0-Standby, 1-Low, 2-Normal, 3-High
10257 Read/write Integer 0..3 Sat2 ventilation level (fan speed) 0 to 3
10258 Read/write Integer 0..3 Sat3 ventilation level (fan speed) 0 to 3
10259 Read/write Integer 0..3 Sun1 ventilation level (fan speed) 0-Standby, 1-Low, 2-Normal, 3-High
10260 Read/write Integer 0..3 Sun2 ventilation level (fan speed) 0 to 3
10261 Read/write Integer 0..3 Sun3 ventilation level (fan speed) 0 to 3

Operation overview

Modbus register actual Type Access Range Description Data values
10113 Read Binary 0..1 AHU (Air Handling Unit) fans status 0-Stopped, 1-Operating
10114 Read Integer 0..100 Supply fan level (current level) 0 to 100%
10115 Read Integer 0..100 Exhaust fan level (current level) 0 to 100%
10009 Read Integer 0..100 Recuperation level (rotating heat exchanger, DIP switch 1 set to ON - not adjustable directly only through setpoint temperature) 0 to 100%
10010 Read Integer 0..100 Electric heater level (heating element, DIP switch 2 set to OFF) 0 to 100%
10011 Read Integer 0..100 Water heating level (external, if installed, DIP switch 2 set to ON) 0 to 100%
10012 Read Integer 0..100 Water cooling level (external, if installed, DIP switch 2 set to ON) 0 to 100%
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