# KNX\_Read\_DPT\_2x

## `KNX_Read_DPT_2x` (FB)

FUNCTION\_BLOCK KNX\_Read\_DPT\_2x EXTENDS SlaveBasic

#### Overview

Read function for DPT 2.x (1-bit controlled).

#### Inputs

| Inputs             | Initial value | Description                               |
| ------------------ | ------------- | ----------------------------------------- |
| `xRequest`         | *FALSE*       | Trigger for one-time read                 |
| `xRequestVisu`     | *FALSE*       | Trigger for one-time read (visualization) |
| `tRequestTime`     | *T#0S*        | Interval for cyclic reading               |
| `eDPT_Format`      | -             | DPT 2.x format selection                  |
| `byAdrGroup`       | *0*           | Group address (0-255)                     |
| `byAdrMiddleGroup` | *0*           | Middle group address (0-7)                |
| `byAdrMainGroup`   | *0*           | Main group address (0-31)                 |
| `xInitValue`       | *FALSE*       | Initial value at `InitOption.InitValue`   |
| `eInitOption`      | -             | Initialization option                     |

#### Outputs

* `xValue` (BOOL): Received Boolean value
* `xControlBit` (BOOL): Received control bit
* `tNextRequest` (TIME): Time until the next read operation

#### Usage

1. Select the DPT 2.x format with `eDPT_Format`.
2. Configure the read options as for DPT 1.x.
3. Monitor `xValue` for the main value and `xControlBit` for the control bit.

InOut:

| Scope       | Name                      | Type            | Initial  | Comment                                                                                            | Inherited from |
| ----------- | ------------------------- | --------------- | -------- | -------------------------------------------------------------------------------------------------- | -------------- |
| Input       | `itfKnxConnector`         | `IKnxConnector` |          | <p>IMasterConnector interface input to register/unregister<br>the FB to the List on the Master</p> | SlaveBasic     |
| Input       | `xEnable`                 | `BOOL`          | TRUE     |                                                                                                    | SlaveBasic     |
| Output      | `sPhysicallAddressDevice` | `STRING(15)`    |          |                                                                                                    | SlaveBasic     |
| Output      | `sGroupAddress`           | `STRING(15)`    |          |                                                                                                    | SlaveBasic     |
| Input       | `xRequest`                | `BOOL`          |          | Read once                                                                                          |                |
| Input Const | `xRequestVisu`            | `BOOL`          |          | Read once                                                                                          |                |
| Input Const | `tRequestTime`            | `TIME`          | TIME#0ms | Monitoring time                                                                                    |                |
| Input Const | `eDPT_Format`             | DPT\_2x         |          | Enum DPT\_2x                                                                                       |                |
| Input Const | `byAdrGroup`              | `BYTE`          | 0        | Group address                                                                                      |                |
| Input Const | `byAdrMiddleGroup`        | `BYTE`          | 0        | Middle-Group-Address                                                                               |                |
| Input Const | `byAdrMainGroup`          | `BYTE`          | 0        | Main-Group-Adress                                                                                  |                |
| Input Const | `xInitValue`              | `BOOL`          |          |                                                                                                    |                |
| Input Const | `eInitOption`             | InitOption      |          |                                                                                                    |                |
| Output      | `xValue`                  | `BOOL`          |          |                                                                                                    |                |
| Output      | `xControlBit`             | `BOOL`          |          |                                                                                                    |                |
| Output      | `tNextRequest`            | `TIME`          |          |                                                                                                    |                |


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