> For the complete documentation index, see [llms.txt](https://support.powerio.com/hub/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://support.powerio.com/hub/downloads/en/codesys-hvac-downloads/hvac-modbus-library.md).

# HVAC Modbus Library

### Documentation

> You can find all important information about this library, including the license and full documentation, in the documentation section.

<a href="/spaces/6G4WDUYxjH3a0to8hJov/pages/0b73a16d0bb89a1115b2d9399b9f6863253dc0a3" class="button secondary" data-icon="books">To the documentation</a>

### Current version

<details>

<summary>1.1.0.57 - HVACModbus - <a href="https://dl.powerio.com/downloads/powerIO-CODESYS-HVACMODBUS-1.1.0.57.compiled-library-v3" class="button primary" data-icon="arrow-down-to-line">Download</a></summary>

Release Date 24.07.2026

**Changes**<br>

1. FB 'EASTRON\_SDM630MCT\_TCP'

   Newly added, tested with a test device..

***

*Technical details and security for download*

<table data-header-hidden><thead><tr><th width="292.62353515625"></th><th></th></tr></thead><tbody><tr><td><i class="fa-file-contract">:file-contract:</i> SBOM (Software Bill of Materials)</td><td><a href="https://hvac-basic-modbus-library-hvacmodbus-1.1.0.57-c0e4cfc02eb3.spdx.json">Link to the SBOM (spdx)</a></td></tr><tr><td><i class="fa-certificate">:certificate:</i> Signing</td><td>Yes (more info)</td></tr><tr><td><i class="fa-abacus">:abacus:</i> Signed library hash</td><td><code>c0e4cfc02eb3</code></td></tr><tr><td></td><td></td></tr></tbody></table>

</details>

***

### Older versions

<details>

<summary>1.1.0.56 - HVACModbus - <a href="https://dl.powerio.com/downloads/powerIO-CODESYS-HVACMODBUS-1.1.0.56.compiled-library-v3">Download</a></summary>

Release Date 21.07.2026

**Changes**<br>

1. FB 'POWERIO\_R100\_UX\_XXX'

   Newly added, tested with a test device..
2. FB 'KSB\_CALIO\_PRO\_PLUS\_Z'

   Newly added, tested by simulation.
3. FB 'SPLUSS\_RFTF\_MOD'

   Newly added, tested by simulation.

***

*Technical details and security for download*

<table data-header-hidden><thead><tr><th width="292.62353515625"></th><th></th></tr></thead><tbody><tr><td><i class="fa-file-contract">:file-contract:</i> SBOM (Software Bill of Materials)</td><td>Link to the SBOM (spdx)</td></tr><tr><td><i class="fa-certificate">:certificate:</i> Signing</td><td>Yes (more info)</td></tr><tr><td><i class="fa-abacus">:abacus:</i> Signed library hash</td><td><code>5e7f1db33f6d</code></td></tr></tbody></table>

</details>

<details>

<summary>1.1.0.55 - HVACModbus - <a href="https://dl.powerio.com/downloads/powerIO-CODESYS-HVACMODBUS-1.1.0.55.compiled-library-v3">Download</a></summary>

Release Date 11.12.2025

**Changes**<br>

* **FB 'Belimo\_EVXXX\_RX\_FW\_4\_2\_1\_MOD'**\
  Newly added. It is a copy of FB 'Belimo\_EVXXX\_RX\_FW\_4\_2\_0\_MOD'.
* **FB 'Belimo\_EVXXXR3+BAC' and comparable**\
  The registers 105 (Default: 0) and 106 (Default: 10000) are rewritten with the default values.
* **FB 'Intesis\_ME\_AC\_MBS\_1'**\
  Newly added. Tested by simulation.
* **FB 'SPLUSS\_RFTM\_XXX\_MOD'**\
  Note: This FB may only be used for newer S+S hardware. For older hardware, the newly re-added FB 'SPLUSS\_RFTM\_LQ\_CO2\_MOD' is available.
* **FB 'SPLUSS\_RFTM\_LQ\_CO2\_MOD'**\
  Added again.
* **FB 'Möhlenhoff\_MPM\_46846' – valve actuator**\
  Newly added. Tested with real hardware.
* **FB 'Danfos\_NOVOCON\_M\_L\_XL' (based on Danfos\_Novocon\_S)**\
  Newly added. Registers for operating modes limited to the first two (1 and 2).
* **FB 'BELIMO\_JRCA\_BAC\_S2\_T'**\
  Newly added. Tested by simulation.
* **FB 'OJ\_DV\_DRIVE'**\
  Newly added. Tested by simulation.
* **FB 'OJ\_DV\_GEN2\_DRIVE'**\
  Newly added. Tested by simulation

***

*Technical details and security for download*

<table data-header-hidden><thead><tr><th width="292.62353515625"></th><th></th></tr></thead><tbody><tr><td><i class="fa-file-contract">:file-contract:</i> SBOM (Software Bill of Materials)</td><td>Link to the SBOM (spdx)</td></tr><tr><td><i class="fa-certificate">:certificate:</i> Signing</td><td>Yes (more info)</td></tr><tr><td><i class="fa-abacus">:abacus:</i> Signed library hash</td><td><code>5e7f1db33f6d</code></td></tr></tbody></table>

</details>

<details>

<summary>1.1.0.53 - HVACModbus - <a href="https://dl.powerio.com/downloads/powerIO-CODESYS-HVACMODBUS-1.1.0.53.compiled-library-v3">Download</a></summary>

Release Date 11.12.2025

**Changes**<br>

* **FB 'Belimo\_EVXXX\_RX\_FW\_4\_2\_1\_MOD'**\
  Newly added. It is a copy of FB 'Belimo\_EVXXX\_RX\_FW\_4\_2\_0\_MOD'.
* **FB 'Belimo\_EVXXXR3+BAC' and comparable**\
  The registers 105 (Default: 0) and 106 (Default: 10000) are rewritten with the default values.
* **FB 'Intesis\_ME\_AC\_MBS\_1'**\
  Newly added. Tested by simulation.
* **FB 'SPLUSS\_RFTM\_XXX\_MOD'**\
  Note: This FB may only be used for newer S+S hardware. For older hardware, the newly re-added FB 'SPLUSS\_RFTM\_LQ\_CO2\_MOD' is available.
* **FB 'SPLUSS\_RFTM\_LQ\_CO2\_MOD'**\
  Added again.
* **FB 'Möhlenhoff\_MPM\_46846' – valve actuator**\
  Newly added. Tested with real hardware.
* **FB 'Danfos\_NOVOCON\_M\_L\_XL' (based on Danfos\_Novocon\_S)**\
  Newly added. Registers for operating modes limited to the first two (1 and 2).
* **FB 'BELIMO\_JRCA\_BAC\_S2\_T'**\
  Newly added. Tested by simulation.
* **FB 'OJ\_DV\_DRIVE'**\
  Newly added. Tested by simulation.
* **FB 'OJ\_DV\_GEN2\_DRIVE'**\
  Newly added. Tested by simulation

***

*Technical details and security for download*

<table data-header-hidden><thead><tr><th width="292.62353515625"></th><th></th></tr></thead><tbody><tr><td><i class="fa-file-contract">:file-contract:</i> SBOM (Software Bill of Materials)</td><td>Link to the SBOM (spdx)</td></tr><tr><td><i class="fa-certificate">:certificate:</i> Signing</td><td>Yes (more info)</td></tr><tr><td><i class="fa-abacus">:abacus:</i> Signed library hash</td><td><code>5e7f1db33f6d</code></td></tr></tbody></table>

</details>

<details>

<summary>1.1.0.51 - HVACModbus - <a href="https://dl.powerio.com/downloads/powerIO-CODESYS-HVACMODBUS-1.1.0.51.compiled-library-v3">Download</a></summary>

Release Date 21.11.2025

**Changes**

* General improvements

***

*Technical details and security for download*

<table data-header-hidden><thead><tr><th width="292.62353515625"></th><th></th></tr></thead><tbody><tr><td><i class="fa-file-contract">:file-contract:</i> SBOM (Software Bill of Materials)</td><td>Link to the SBOM (spdx)</td></tr><tr><td><i class="fa-certificate">:certificate:</i> Signing</td><td>Yes (more info)</td></tr><tr><td><i class="fa-abacus">:abacus:</i> Signed library hash</td><td><code>2fd4a4764c08</code></td></tr></tbody></table>

</details>

<details>

<summary>1.1.0.49 - HVACModbus - <a href="https://dl.powerio.com/downloads/powerIO-CODESYS-3.5.17.2-HVACMODBUS-1.1.0.49.compiled-library">Download</a></summary>

Release Date 11.07.2025

**Changes**

* FB 'BELIMO\_P\_22RTX\_1U00X\_2\_FULL'
  * Operating mode - parameter 'eEcoBoostOnOffIconMode' = BELIMO\_P\_22RTX\_1U00X\_2\_ICON\_MODE.PRESENCE\_BUTTON: The parameter 'xVisuPresence' is now declared as input 'xVisuPresence'. Each rising edge on the parameter 'xVisuPresence' generates a pulse of duration 'tTimeButtonPulse' at the output 'xButtonPresence'
  * Restrictions:
    * The external FB 'HVAC.Button1' must not be operated with the following parameter settings:
      * xEnClockButton = false
      * xEnToggle = false
    * The two parameters mentioned above must not be changed during online operation. Reason: The FB 'HVAC.Button1' does not detect parameter changes during online operation
  * An updated application view 'BELIMO\_P\_22RTX\_1U00X\_2\_FULL\_ANWENDUNG' has been added.
  * Adaptation of the documentation
* FB 'SPLUSS\_RYMASKON\_2XX\_MOD\_V2'
  * Bug fix in the definition of the offsets:
    * rRoomTempOffset
    * rRelHumidityOffset
    * rExtTempOffset
* FB 'SPLUSS\_RYMASKON\_2XX\_MOD'
  * Bug fix in the definition of the offsets:
    * rRoomTempOffset
    * rRelHumidityOffset
    * rExtTempOffset

</details>

<details>

<summary>1.1.0.48 - HVACModbus - <a href="https://dl.powerio.com/downloads/powerIO-CODESYS-3.5.17.2-HVACMODBUS-1.1.0.48.compiled-library">Download</a></summary>

Release Date 30.05.2025

**Changes**

* FB 'SAMSUNG\_INTESIS\_IDU\_FC04\_RXXX0\_RXX38'
  * Reduction from 3 communication processes to one communication process (FC03: XXX0 - XX38) after testing on a real gateway
* FB 'BELIMO\_P\_22RTX\_1U00X\_2\_FULL'
  * Operating mode - parameter 'eEcoBoostOnOffIconMode' = BELIMO\_P\_22RTX\_1U00X\_2\_ICON\_MODE.PRESENCE\_BUTTON: Each rising edge on the parameter 'xVisuPresence' generates a pulse of duration 'tTimeButtonPulse' at the output 'xButtonPresence'.\
    Restrictions:
    * The external FB 'HVAC.Button1' must not be operated with the following parameter settings:
      * xEnClockButton = FALSE
      * xEnToggle = FALSE
    * The two parameters mentioned above must not be changed during online operation (reason: The FB 'HVAC.Button1' does not detect parameter changes during online operation)
  * Adaptation of the documentation

</details>

<details>

<summary>1.1.0.47 - HVACModbus - <a href="https://dl.powerio.com/downloads/powerIO-CODESYS-3.5.17.2-HVACMODBUS-1.1.0.47.compiled-library">Download</a></summary>

Release Date 06.05.2025

**New functions**

* FB 'SAMSUNG\_INTESIS\_IDU\_FC04\_RXXX0\_RXX38'

**Changes**

* Parameter changes of the function blocks of all devices with writable setpoints (initial value). This is intended to ensure that setpoints are transmitted securely in a timely manner.
  * old: 'tTimeUpdateSetp' = T#0s
  * new: 'tTimeUpdateSetp' = T#45s
* FB 'BELIMO\_CQ24A\_BAC\_MOD'
  * Parameter 'eRelPosMode' added
    * BELIMO\_CQ24A\_BAC\_MOD\_RELPOS\_MODE.RELATIVE\_TO\_RMAX: rRelPos: Calculated value relative to parameter 'rMax' in %. Example: rMax = 60.0 %, direct value from the device = 50 %, rRelPos = 83.33 %
    * BELIMO\_CQ24A\_BAC\_MOD\_RELPOS\_MODE.DEVICE\_VALUE: rRelPos: Direct value from the device in %
* FB 'ResolveAddressAsync'
  * New attribute 'hide' added
* FB 'TwoPoint'
  * New attribute 'hide' added
* All function blocks: The permitted range for the Modbus device addresses is uniformly set to 1..255 (RTU and TCP).
* FB 'BELIMO\_P\_22RTX\_1U00X\_2\_FULL': operating mode 'PRESENCE\_BUTTON' - The parameter 'xEcoIconPresenceButtonMode' defines the function / display of the ECO icon on the RBG:
  * FALSE: no display / function available
  * TRUE: display and function available, the operating mode changes each time the ECO icon is pressed from 'ON\_COMFORT' to 'ECO\_MODE' and back again.
* FB 'ModbusClient\_TCP': behavior in the error case 'number of received payload data <> number of requested payload data' optimized.
* FB 'ModbusClient\_TCP\_Fast': behavior in the error case 'number of received payload data <> number of requested payload data' optimized.

</details>

<details>

<summary>1.1.0.46 - HVACModbus - <a href="https://dl.powerio.com/downloads/powerIO-CODESYS-3.5.17.2-HVACMODBUS-1.1.0.46.compiled-library">Download</a></summary>

Release Date 28.11.2024

**New functions**

* FB 'FINDER\_7M\_24\_8\_230\_0212'
* FB 'SPLUSS\_714X\_MOD'
* FB 'SPLUSS\_724X\_MOD'
* FB 'SPLUSS\_LCD\_SHD\_MODBUS\_EASY'
* FB 'BELIMO\_EPXXXR2\_BAC\_FW\_4\_2\_0\_MOD'

**Changes**

* FB 'LOYTEC\_LSTAT\_80X\_GX\_LX\_MOD'
  * Bug fixed in the recognition of the Product Code
* FB 'ABB\_B21\_23\_24'
  * Device sub-version detection added (Steel, Bronze, Silver)
  * Device version detection added (B21, B23, B24)
  * Definition of maximum values for displaying actually present measured variables
  * Function: If an actual value of a measured variable exceeds its assigned maximum value, '0.0' is displayed at the output of the measured variable
* Adaptation of the Modbus telegrams (unused registers must not be read)
  * FB 'OPPERMANN\_P\_MOD\_W16'
  * FB 'OPPERMANN\_HT\_MOD\_I\_XXX'
  * FB 'OPPERMANN\_PV\_MOD\_ADX'
  * FB 'OPPERMANN\_T\_MOD\_I\_XXX'
* FB 'BELIMO\_P\_22RTX\_1U00X\_2\_FULL'
  * Bug fix - output 'rOffset'
* FB 'BELIMO\_P\_22RTX\_1U00X\_2\_EASY'
  * FB removed without replacement

</details>

<details>

<summary>1.1.0.44 - HVACModbus - <a href="https://dl.powerio.com/downloads/powerIO-CODESYS-3.5.17.2-HVACMODBUS-1.1.0.44.compiled-library">Download</a></summary>

Release Date 28.11.2024

**New functions**

* FB 'OPPERMANN\_HT\_MOD\_I\_XXX'
* FB 'OPPERMANN\_KRM\_X\_2\_MOD'
* FB 'OPPERMANN\_MSX\_MOD\_I\_80\_XX\_X\_XXX'
* FB 'OPPERMANN\_PV\_MOD\_ADX'
* FB 'OPPERMANN\_P\_MOD\_W16'
* FB 'OPPERMANN\_T\_MOD\_I\_XXX'
* FB 'KAMSTRUP\_MULTICAL\_XX3\_DEFAULT'
* FB 'THERMOKON\_WRF07\_TEMP\_HUMIDITY'
* FB 'THERMOKON\_WRF07\_TEMP\_HUM\_AO2V\_REV\_A\_H'
* FB 'BELIMO\_EPXXXX\_FW\_3\_0\_8\_MOD
  * This function block is suitable for all 'EP' valves with firmware 3\_0\_8 (status 09/2024).
* FB DAIKIN\_EKMBDXB7V1\_IDU\_FC16\_2000\_2143
  * In this function block, only the setpoints of indoor units 1-0 to 3-15 are updated.

**Changes**

* FB 'OPPERMANN\_KRM\_2\_DZ\_MOD' and 'OPPERMANN\_KRM\_X\_2\_MOD':
  * Output 'xSmokeAlarm'
    * Function previously: active if output 'wSensor' ≥ 255
    * Function new: active if output 'eState' = 'DEVICE\_FAULT' or 'DEVICE\_ALARM' or 'DEVICE\_FAULT\_ALARM'
* FB 'LOYTEC\_LSTAT\_80X\_GX\_LX\_MOD'
  * automatic detection of the Product Code added
  * CO2 sensor and occupancy detection added
  * Input 'xResToSetpTempBase' added (each rising edge sets the setpoint temperature offset to 0.0)
* All FBs: Function of output 'xAlarmCom'
  * The output becomes active if, during a centrally configurable time period (global constant 'gc\_Parameters.gc\_tOnDelayxAlarmCom'), at least one of the following conditions is continuously met:
    * The connection between the assigned client (output 'xConnected' = false) and the associated server is interrupted.
    * After completion of each communication (request and response telegram), a communication error is detected.
  * The output becomes inactive if none of the conditions described above are met anymore.
* All FBs: Function of output 'eErrorCodeCom'
  * The output 'eErrorCodeCom' always provides the last active communication error. It can be reset by a rising edge at input 'xResError' each time.
* FB 'BELIMO\_EVXXXF\_FW\_3XX\_MOD'
  * Error at output 'eAO' fixed
  * Error at output 'stErrorCodeDev' fixed
* FB 'SPLUSS\_TM65\_MOD\_V2' moved to the 'Reserve' folder.
* FB 'SPLUSS\_TM65\_MOD\_V3' moved to the 'Reserve' folder.

</details>

<details>

<summary>1.1.0.39 - HVACModbus - <a href="https://dl.powerio.com/downloads/powerIO-CODESYS-3.5.17.2-HVACMODBUS-1.1.0.39.compiled-library">Download</a></summary>

Release Date 16.09.2024

**New functions**

* FB 'DAIKIN\_EKMBDXB7V1\_IDU\_FC04\_1000\_1191'. This can be used to read part of the configuration of the indoor units.
* FB 'BELIMO\_EVXXX\_RX\_FW\_4\_2\_0\_MOD'
* FB 'BELIMO\_EVXXX\_RX\_FW\_4\_0\_UND\_4\_1\_MOD'
* FB 'BELIMO\_EVXXX\_F\_FW\_3XX\_MOD'

**Changes**

* FB 'THERMOKON\_WRF06':
  * Changes in the setting of fan stages.
* FB 'THIES\_WSC11\_MOD'
  * Output 'rYYYMMDD' changed from data type REAL to DWORD. Rounding errors during conversion are avoided.
* FB 'ABB\_B21\_23\_24'
  * The counter values were changed from data format REAL to ULINT. Rounding errors during conversion are avoided.
* FB 'FINDER\_7E\_46\_8\_400\_0212'
  * Counter values were changed from data format REAL to DWORD. Rounding errors during conversion are avoided.
* FB 'GRUNDFOS\_MAGNA\_3\_MONO'
  * Counter values were changed from data format WORD to DWORD. Reason: Avoidance of overflow errors.
  * The following outputs were added:
    * rDiffTemp
    * dwCoolEnergyTotal
    * dwCoolVolumeTotal
* FB 'BELIMO\_P\_22RTX\_1U00X\_2\_FULL'
  * Error in the formation of the room setpoint temperature due to switching the operating modes fixed.
  * Operating mode: 'OPERATION\_MODE': Error in the formation of the room setpoint temperature during operation at the RBG fixed.
* FB 'BELIMO\_P\_22RTX\_1U00X\_2\_EASY'
  * Output 'eEcoBoostOnOffIconMode' added to display the current operating mode.
  * Error in the formation of the room setpoint temperature due to switching the operating modes fixed.
  * Operating mode 'OPERATION\_MODE': Error in the formation of the room setpoint temperature during operation at the RBG fixed.

</details>

<details>

<summary>1.1.0.38 - HVACModbus - <a href="https://dl.powerio.com/downloads/powerIO-CODESYS-3.5.17.2-HVACMODBUS-1.1.0.38.compiled-library">Download</a></summary>

Release Date 17.06.2024

**New functions**

* new FB 'DAIKIN\_EKMBDXB'. Function block for the Modbus interface for up to 64 indoor units.

**Changes**

* FB 'THERMOKON\_WRF06':
  * Error in the area of analog outputs AO01 and AO02 fixed
  * Error in the setting of fan stages fixed
* FB 'SPLUSS\_2328\_MOD\_LCD'
  * Error in the output of pressure actual values corrected

</details>

<details>

<summary>1.1.0.37 - HVACModbus - <a href="https://dl.powerio.com/downloads/powerIO-CODESYS-3.5.17.2-HVACMODBUS-1.1.0.37.compiled-library">Download</a></summary>

Release Date 16.05.2024

**New functions**

* new FB 'BELIMO\_P\_22RTX\_1U00X\_2\_FULL'. This FB allows the complete configuration (addresses 110..149) of all parameters in the 'Service' area. The use of the 'Belimo Assistant' app is therefore optional.
* new FB 'BELIMO\_P\_22RTX\_1U00X\_2\_EASY'. This FB reads the complete configuration (addresses 110..149) of all parameters in the 'Service' area (once at restart, on each rising edge at input 'xUpdateConfig' or cyclically at interval 'tTimeUpdateConfig'). The parameters are set in the 'Belimo Assistant' app. The following parameters cannot be set in the app:
  * eTemperatureUnit (address 120)
  * eOffsetUnit (address 122)
  * eDsplIconsHeatCool (address 134)
  * eWarningIconFunct (address 135)
  * eWindowIconFunct (address 136)
  * Mode On/Off Button (address 141)
* new FB 'GÜNTER\_GMMNEXT'
* new FB 'THERMOKON\_WRF06'

**Changes**

* FB 'DANFOSS\_NOVOCON': outputs 'rAI1' and 'rAI2' added
* all FBs with output 'xAlarmCom': The non-existent connection between Modbus-TCP client (FB 'ModbusClient\_TCP' or FB 'ModbusClient\_TCP\_Fast', output 'xConnected') and Modbus-TCP server is only passed to output 'xAlarmCom' after a period of 'gc\_tOnDelayxAlarmCom'. Previously, the transfer was immediate.
* FB 'EBM\_SERIEN\_84\_112\_150\_200\_V6\_0' and 'EBM\_SERIEN\_84\_112\_150\_200\_V6\_3':
  * Register D103: The default value was changed from 1 to 0
  * The instance 'Sollwerte\_2' is moved to the new instance 'Konfiguration\_5' (as the register addresses are in the EEPROM area and must not be written cyclically)
* FB 'EBM\_SERIEN\_84\_112\_150\_200\_V5\_0'
  * The instance 'Sollwerte\_1' is moved to the new instance 'Konfiguration\_2' (as the register addresses are in the EEPROM area and must not be written cyclically)
  * The instance 'Sollwerte\_2' is moved to the new instance 'Konfiguration\_3' (as the register addresses are in the EEPROM area and must not be written cyclically)
  * The instance 'Sollwerte\_3' is moved to the new instance 'Konfiguration\_4' (as the register addresses are in the EEPROM area and must not be written cyclically)

</details>

<details>

<summary>1.1.0.36 - HVACModbus - <a href="https://dl.powerio.com/downloads/powerIO-CODESYS-3.5.17.2-HVACMODBUS-1.1.0.36.compiled-library">Download</a></summary>

Release Date 15.01.2024

**New functions**

* new FB 'THERMOKON\_WRF07\_CO2\_VOC'

</details>

<details>

<summary>1.1.0.35 - HVACModbus - <a href="https://dl.powerio.com/downloads/powerIO-CODESYS-3.5.17.2-HVACMODBUS-1.1.0.35.compiled-library">Download</a></summary>

Release Date 04.01.2024

**New functions**

* Introduction of parameters for the measured-value comparison (=offset)
  * GRUNDFOS\_MAGNA\_3\_MONO
  * IMI\_TA\_SLIDER\_160
  * KAMPMANN\_FAN\_COIL
  * POWERIO\_T1\_R100
  * POWERIO\_T1\_R100\_V2
  * POWERIO\_T1\_R300
  * POWERIO\_T1\_R310
  * PRIGNITZ\_CIT2
  * ROSENBERG\_FAN\_EC\_MOTOR
  * THERMOKON\_NOVOS\_TOUCH
  * THERMOKON\_NOVOS\_TOUCH\_V2
  * THERMOKON\_WRF07
  * THIES\_WSC11\_MOD
  * TROX\_BM0
  * TROX\_VRU\_BUDN
  * TROX\_XM0
  * AERASGARD SPLUSS\_FSFTM\_CO2\_MOD
  * AERASGARD SPLUSS\_FSFTM\_CO2\_POTI\_MOD (new function block)
  * HYGRASGARD SPLUSS\_FSFTM\_MOD
  * HYGRASGARD SPLUSS\_FSFTM\_POTI\_MOD (new function block)
  * AERASGARD SPLUSS\_KFTM\_LQ\_CO2\_MOD
  * AERASGARD SPLUSS\_AFTM\_LQ\_CO2\_MOD (new function block)
  * AERASGARD SPLUSS\_RFTM\_XXX\_MOD (new function block)
  * AERASGARD SPLUSS\_RFTM\_CO2\_POTI\_MOD (new function block)
  * AERASGARD SPLUSS\_RFTM\_LQ\_PS\_CO2\_WITHOUT\_POT\_REV2022\_MOD
  * HYGRASGARD SPLUSS\_AFTF\_MOD
  * HYGRASGARD SPLUSS\_KFTF\_MOD
  * HYGRASGARD SPLUSS\_RPFTF\_MOD
  * HYGRASGARD SPLUSS\_TW\_MOD
  * HYGRASGARD SPLUSS\_VFTF\_MOD
  * PREMASGARD SPLUSS\_2327\_MOD\_LCD
  * PREMASGARD SPLUSS\_2328\_MOD\_LCD
  * PREMASGARD SPLUSS\_8147\_MOD\_LCD
  * PREMASGARD SPLUSS\_8148\_MOD\_LCD
  * THERMASGARD SPLUSS\_ALTM1\_MOD
  * THERMASGARD SPLUSS\_ALTM2\_MOD
  * THERMASGARD SPLUSS\_ATM2\_MOD
  * THERMASGARD SPLUSS\_HFTM\_MOD
  * THERMASGARD SPLUSS\_MWTM\_MOD
  * THERMASGARD SPLUSS\_RPTM1\_MOD
  * THERMASGARD SPLUSS\_RPTM2\_MOD
  * THERMASGARD SPLUSS\_TM65\_MOD
  * THERMASGARD SPLUSS\_TM65\_MOD\_V2
  * THERMASGARD SPLUSS\_TM65\_MOD\_V3
  * THERMASGARD SPLUSS\_RTM1\_MOD
  * SPLUSS\_RYMASKON\_2XX\_MOD
  * SPLUSS\_RYMASKON\_2XX\_MOD\_V2
  * SPLUSS\_RYMASKON\_5XX\_MOD
  * SPLUSS\_RYMASKON\_7XX\_MOD

</details>

<details>

<summary>1.1.0.34 - HVACModbus - <a href="https://dl.powerio.com/downloads/powerIO-CODESYS-3.5.17.2-HVACMODBUS-1.1.0.34.compiled-library">Download</a></summary>

Release Date 11.12.2023

**New functions**

* Introduction of parameters for the measured-value comparison (=offset)
  * BD\_SENSORS\_DCT\_531
  * BELIMO\_GR24A\_MOD\_5
  * BELIMO\_LM24A\_MOD
  * BELIMO\_LR24A\_MOD
  * BELIMO\_LR24A\_MOD\_V2
  * BELIMO\_NM24A\_MOD
  * BELIMO\_NR24A\_MOD
  * BELIMO\_NV24A\_MOD
  * BELIMO\_PRCA\_BAC\_S2\_T
  * BELIMO\_SF24A\_MOD
  * BELIMO\_VRU\_D3\_BAC\_FULL
  * BELIMO\_VSR24A\_LP1\_MOD
  * ELSNER\_P03\_3\_MODBUS\_MIT\_GPS

**Changes**

* FB

</details>

<details>

<summary>1.1.0.32 - HVACModbus - <a href="https://dl.powerio.com/downloads/powerIO-CODESYS-3.5.17.2-HVACMODBUS-1.1.0.32.compiled-library">Download</a></summary>

Release Date 30.11.2023

**New functions and changes**

* FB 'SimpleWriteCoil\_FC05'. This FB allows writing 1 coil (FC05)
* FB 'SimpleWriteCoils\_FC15'. This FB allows writing 2 to 64 coils (FC15). With the FB 'SimpleWriteValueCoil', on the other hand, only 8, 16, 32 or 64 coils can always be written simultaneously with FC15.

**Changes**

* FB 'SPLUSS\_RYMASKON\_7XX\_MOD': Elimination of errors related to the capture of the current room setpoint temperature in day mode of the RBG.
* FB 'SPLUSS\_RYMASKON\_5XX\_MOD': Elimination of errors related to the capture of the current room setpoint temperature in day mode of the RBG.

</details>

<details>

<summary>1.1.0.31 - HVACModbus - <a href="https://dl.powerio.com/downloads/powerIO-CODESYS-3.5.17.2-HVACMODBUS-1.1.0.31.compiled-library">Download</a></summary>

Release Date 30.10.2023

**Changes**

FB 'DANFOSS\_NOVOCON'

When writing the valve type (eValveType), some internal registers of the valve actuator are initialized. Due to the change to the FB, when the valve type changes, all relevant configuration parameters and outputs are now retransmitted to the valve actuator.

</details>

<details>

<summary>1.1.0.30 - HVACModbus - <a href="https://dl.powerio.com/downloads/powerIO-CODESYS-3.5.17.2-HVACMODBUS-1.1.0.30.compiled-library">Download</a></summary>

Release Date 26.09.2023

Fixes for errors from version 1.1.0.29 in connection with the FB 'SimpleReadCoilInput'. Affected methods:

* SendReadRequest
* OnResponseComplete

</details>

<details>

<summary>1.1.0.29 - HVACModbus - <a href="https://dl.powerio.com/downloads/powerIO-CODESYS-3.5.17.2-HVACMODBUS-1.1.0.29.compiled-library">Download</a></summary>

Release Date 21.09.2023

**New functions and changes**

* new FB 'BELIMO\_C615QP\_B\_MOD'
* FB 'SIEMENS\_PAC\_3200' adapted
* new FB 'SimpleReadCoilInput'
  * This new function block allows reading 1 - 64 coils or inputs (FC01 / FC02)
  * With the FB 'SimpleReadValue', however, only 16, 32 or 64 coils or inputs can always be read simultaneously

</details>

<details>

<summary>1.1.0.28 - HVACModbus - <a href="https://dl.powerio.com/downloads/powerIO-CODESYS-3.5.17.2-HVACMODBUS-1.1.0.28.compiled-library">Download</a></summary>

Release Date 24.08.2023

**New functions and changes**

* new FB 'ModbusClient\_TCP\_Fast'
  * This FB corresponds to the previous FB 'ModbusClient\_TCP'. Two states of the state machine have been removed to increase the transmission rate of the Modbus telegrams in the client-server connection.
* FB 'DANFOSS\_NOVOCON' adapted
* FB 'KAMPMANN\_FAN\_COIL' changed
  * Registers 198...201 must not be written in one telegram, as register 200 is not defined.
  * Registers 210...215 must not be written in one telegram, as registers 212..214 are not defined.

</details>

<details>

<summary>1.1.0.27 - HVACModbus - <a href="https://dl.powerio.com/downloads/powerIO-CODESYS-3.5.17.2-HVACMODBUS-1.1.0.27.compiled-library">Download</a></summary>

Release Date 04.08.2023

**New functions and changes**

* new FB 'BELIMO\_VSR24A\_LP1\_MOD'

</details>

<details>

<summary>1.1.0.26 - HVACModbus - <a href="https://dl.powerio.com/downloads/powerIO-CODESYS-3.5.17.2-HVACMODBUS-1.1.0.26.compiled-library">Download</a></summary>

Release Date 17.07.2023

**New functions**

* new FB 'SimpleWriteArrayOfWord'
* new FB 'SimpleWriteArrayOfInt'

</details>

<details>

<summary>1.1.0.25 - HVACModbus - <a href="https://dl.powerio.com/downloads/powerIO-CODESYS-3.5.17.2-HVACMODBUS-1.1.0.25.compiled-library">Download</a></summary>

Release Date 07.07.2023

**New functions and changes**

* new FB 'SimpleReadArray'
* FB 'KAMPMANN\_FAN\_COIL'
  * Error in the transmission of the virtual room temperature (register 75) fixed
* All FBs: checking pointers for validity

</details>

<details>

<summary>1.1.0.24 - HVACModbus - <a href="https://dl.powerio.com/downloads/powerIO-CODESYS-3.5.17.2-HVACMODBUS-1.1.0.24.compiled-library">Download</a></summary>

Release Date 28.06.2023

**New functions and changes**

* FB 'HELIOS\_KWL\_MODBUS\_GATEWAY'
  * Renaming:
    * 'rSetpFanStage' setpoint fan stage
    * 'rSetpFanStage\_Fb' active fan stage
  * Extension:
    * 'rSetpTemp' setpoint comfort temperature
    * 'rSetpTemp\_Fb' feedback of setpoint comfort temperature
    * 'xUpdateSetp' update of the setpoints
    * 'tTimeUpdateSetp' update interval
    * 'rSetpFanStageMin' active minimum fan stage
* new FB 'BELIMO\_VRU\_D3\_BAC\_EASY'
* new FB 'BELIMO\_VRU\_D3\_BAC\_FULL'
* All FBs in the folder 'Manufacturer Modbus Devices'
  * The output 'xAlarmCom' becomes active (=TRUE) without delay if the output 'xConnected' of the associated FB 'ModbusClient\_TCP' becomes inactive (=FALSE)
* Update of the library 'SysSocket' to 3.5.18.40
* Update of the library 'SysSocket2' to 3.5.18.40

</details>

<details>

<summary>1.1.0.23 - HVACModbus - <a href="https://dl.powerio.com/downloads/powerIO-CODESYS-3.5.17.2-HVACMODBUS-1.1.0.23.compiled-library">Download</a></summary>

Release Date 16.06.2023

Complete revision, bug fixes, functional improvements, and migration of the TCP library to the SysSocket2 library.

**New functions and changes**

* FB 'ModbusClient\_TCP'
  * The state machine now has more states than before (advantages for troubleshooting, disadvantageous with large task cycle times)
  * The method 'ReadyForReceive' reliably and quickly detects an interrupted client-server connection
  * Input 'xEn' added
  * Output 'xReady' added
  * Changes to the parameters 'sHostAddress' or 'wPort' are detected and cause the previous connection to be terminated and the new one to be established
  * Number of timeout parameters reduced to 4
  * Known issue: In state 'Ready', an interrupted client-server connection is not yet detected!

</details>

<details>

<summary>1.1.0.22 - HVACModbus - <a href="https://dl.powerio.com/downloads/powerIO-CODESYS-3.5.17.2-HVACMODBUS-1.1.0.22.compiled-library">Download</a></summary>

Release Date 18.04.2023

**New functions and changes**

* FB 'ModbusClient\_TCP'
  * Parameter 'xCheckServer': initial value = TRUE (cyclic check of the client-server connection is active)
  * Parameter 'tTimeCheckServer': initial value = 60s (cyclic check of the client-server connection every 60s, if xCheckServer = TRUE).
  * Parameter 'tTimeoutServerConnect' renamed to 'tTimeoutServerConnectMin'
  * Parameter 'tTimeoutServerConnectMax' (initial value = 24h) added.
  * After each timeout in state 'CONNECT', the duration of the next timeout is doubled (maximum value: tTimeoutServerConnectMax)
  * Changes to the input 'sHostAddress' are detected and cause the connection to be re-established.
  * Changes to the input 'wPort' are detected and cause the connection to be re-established.
* FB 'SIEMENS\_PAC\_3200'
  * Output 'rOperatingHours' (operating hours) added.

</details>

<details>

<summary>1.1.0.21 - HVACModbus - <a href="https://dl.powerio.com/downloads/powerIO-CODESYS-3.5.17.2-HVACMODBUS-1.1.0.21.compiled-library">Download</a></summary>

Release Date 18.04.2023

**New functions and changes**

* FB 'ModbusClient\_TCP'
  * Parameter 'xCheckServer': initial value = TRUE (cyclic check of the client-server connection is active)
  * Parameter 'tTimeCheckServer': initial value = 60s (cyclic check of the client-server connection every 60s, if xCheckServer = TRUE).
  * Parameter 'tTimeoutServerConnect' renamed to 'tTimeoutServerConnectMin'
  * Parameter 'tTimeoutServerConnectMax' (initial value = 24h) added.
  * After each timeout in state 'CONNECT', the duration of the next timeout is doubled (maximum value: tTimeoutServerConnectMax)
  * Changes to the input 'sHostAddress' are detected and cause the connection to be re-established.
  * Changes to the input 'wPort' are detected and cause the connection to be re-established.
* FB 'SIEMENS\_PAC\_3200'
  * Output 'rOperatingHours' (operating hours) added.

</details>

<details>

<summary>1.1.0.20 - HVACModbus - <a href="https://dl.powerio.com/downloads/powerIO-CODESYS-3.5.17.2-HVACMODBUS-1.1.0.20.compiled-library">Download</a></summary>

Release Date 12.08.2022

**New functions and changes**

* n.a.

</details>

<details>

<summary>1.0.0.3 - HVACModbus - <a href="https://dl.powerio.com/downloads/powerIO-CODESYS-3.5.14.0-HVACModbus-1.0.0.3.compiled-library">Download</a></summary>

Release Date 12.08.2020

**New functions and changes**

* n.a.

</details>

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