# BELIMO\_VRU\_D3\_BAC\_EASY

## `BELIMO_VRU_D3_BAC_EASY` (FB)

`FUNCTION_BLOCK` BELIMO\_VRU\_D3\_BAC\_EASY

### Representation

<figure><img src="/files/8bf1983dff00e386a8c819873982cbb980f2be04" alt=""><figcaption></figcaption></figure>

InOut:

| Scope       | Name                    | Type                                | Initial                                          | Comment                                                                                                                                                                                                                                          |
| ----------- | ----------------------- | ----------------------------------- | ------------------------------------------------ | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ |
| Input       | `xEn`                   | `BOOL`                              | TRUE                                             | Enable / disable communication (TRUE = enable)                                                                                                                                                                                                   |
| Input       | `byUnitId`              | `BYTE`                              | 0                                                | Device address                                                                                                                                                                                                                                   |
| Input       | `xUpdateActual`         | `BOOL`                              | FALSE                                            | <p>Update of actual values (on every rising edge<br>)</p>                                                                                                                                                                                        |
| Input       | `xUpdateSetp`           | `BOOL`                              | FALSE                                            | <p>Update of setpoints (on every rising edge<br>)</p>                                                                                                                                                                                            |
| Input       | `xResError`             | `BOOL`                              | FALSE                                            | <p>Reinitialization of the outputs <code>eErrorCodeCom</code> or<br><code>stErrorCodeDev</code> to the fault-free state (on every rising edge)</p>                                                                                               |
| Input       | `rSetpPerc`             | `REAL`                              | 0.0                                              | Setpoint in % (0.0 - 100.0 %) depending on application                                                                                                                                                                                           |
| Input       | `eOverrideCon`          | BELIMO\_VRU\_D3\_BAC\_OVERRIDE\_CON | BELIMO\_VRU\_D3\_BAC\_OVERRIDE\_CON.NO\_OVERRIDE | <p>Airflow control: setpoint - airflow in % (0.0 - 100.0 %) (0.0 % = Vmin, 100.0 % = Vmax)<br>Forced override of the air damper (0 = none)</p>                                                                                                   |
| Inout       | `ModbusClient`          | `ModbusClientBase`                  |                                                  | Client of the device                                                                                                                                                                                                                             |
| Output      | `rVminM3H`              | `REAL`                              |                                                  | Minimum value - airflow in m3/h                                                                                                                                                                                                                  |
| Output      | `rVmaxM3H`              | `REAL`                              |                                                  | Maximum value - airflow in m3/h                                                                                                                                                                                                                  |
| Output      | `rVnomM3H`              | `REAL`                              |                                                  | Nominal airflow in m3/h                                                                                                                                                                                                                          |
| Output      | `rVolFlowM3H`           | `REAL`                              |                                                  | Actual value of the airflow in m3/h                                                                                                                                                                                                              |
| Output      | `rSetpPercFb`           | `REAL`                              |                                                  | Feedback of the setpoint in % (0.0 - 100.0 %)                                                                                                                                                                                                    |
| Output      | `eCommandFb`            | BELIMO\_VRU\_D3\_BAC\_COMMAND       |                                                  | Feedback of the triggering of test functions (0 = none)                                                                                                                                                                                          |
| Output      | `eOverrideConFb`        | BELIMO\_VRU\_D3\_BAC\_OVERRIDE\_CON |                                                  | <p>Feedback of the forced override of the air damper (0 =<br>none)</p>                                                                                                                                                                           |
| Output      | `xAlarm`                | `BOOL`                              | FALSE                                            | Collective fault (TRUE = fault)                                                                                                                                                                                                                  |
| Output      | `xAlarmCom`             | `BOOL`                              | FALSE                                            | Collective fault - communication (TRUE = fault)                                                                                                                                                                                                  |
| Output      | `eErrorCodeCom`         | ModbusErrorCode                     |                                                  | Error code - communication (0 = no error)                                                                                                                                                                                                        |
| Output      | `stErrorCodeDev`        | `STRING`                            |                                                  | String with the numbers of the active device errors                                                                                                                                                                                              |
| Output      | `xBusy`                 | `BOOL`                              |                                                  | Communication indicator (TRUE = communication)                                                                                                                                                                                                   |
| Input Const | `eCommand`              | BELIMO\_VRU\_D3\_BAC\_COMMAND       | BELIMO\_VRU\_D3\_BAC\_COMMAND.NO\_COMMAND        | Triggering of test functions (0 = none)                                                                                                                                                                                                          |
| Input Const | `xSetpVolumeFlowMinMax` | `BOOL`                              | FALSE                                            | <p>Triggering the transfer of the parameters <code>rSetpVolumeFlowMin</code><br>or <code>rSetpVolumeFlowMax</code> (on every rising edge)</p>                                                                                                    |
| Input Const | `rSetpVolumeFlowMax`    | `REAL`                              | 2000.0                                           | <p>Setpoint for the maximum volume flow in the selected<br>volume flow unit (at rSetpVolFlowPerc = 100.0 %)</p>                                                                                                                                  |
| Input Const | `rSetpVolumeFlowMin`    | `REAL`                              | 500.0                                            | <p>Setpoint for the minimum volume flow in the selected<br>volume flow unit (at rSetpVolFlowPerc = 0.0 %)</p>                                                                                                                                    |
| Input Const | `tBusFailureTimeOut`    | `TIME`                              | TIME#10s0ms                                      | <p>Duration for activation of the state<br><code>Communication error</code> (t = 0s = disabled, for t >= 10s<br>(at least 10 s) the parameter must <code>rSetpVolFlowPerc</code><br>must be transferred cyclically with a time interval < t)</p> |
| Input Const | `rBusFailurePos`        | `REAL`                              | 100.0                                            | <p>Position of the damper in the event of a bus failure (in %, 100% =<br>open)</p>                                                                                                                                                               |
| Input Const | `tTimeUpdateSetp`       | `TIME`                              | TIME#45s0ms                                      | <p>Update interval for the processes influenced by the input<br><code>xUpdateSetp</code> influenced</p>                                                                                                                                          |
| Input Const | `tTimeUpdateActual`     | `TIME`                              | TIME#3s0ms                                       | <p>Update interval for the processes influenced by the input<br><code>xUpdateActual</code> influenced</p>                                                                                                                                        |


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