> 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/codesys-hvac/mysql-library/funktionsbausteine/mysql_connectionstring.md).

# MySQL\_ConnectionString

## `MySQL_ConnectionString` (FB)

FUNCTION\_BLOCK MySQL\_ConnectionString

**Kurze Beschreibung:**

> Dieser Funktionsbaustein enthält die Anmelde- und Serverinformationen.

**Detaillierte Beschreibung:**\
Der Funktionsbaustein muss einmal im SPS-Programm definiert werden. Er speichert alle Parameter der anderen MySQL-FBox-Instanzen.

{% hint style="warning" %}
**Achtung:** Für eine stabile Funktionalität sollte dieser Funktionsbaustein nicht innerhalb des SPS-Programms „aufgerufen“ werden.
{% endhint %}

InOut:

| Scope | Name                  | Type                                                       | Comment                                                                                |
| ----- | --------------------- | ---------------------------------------------------------- | -------------------------------------------------------------------------------------- |
| Input | `xConnected`          | `BOOL`                                                     | TRUE: Successfully connected and logged in.                                            |
| Input | `sHost`               | `STRING`                                                   | MySQL-Server host address as hostname or IP-Address                                    |
| Input | `uiPort`              | `UINT`                                                     | MySQL-Server port (Default: 3306)                                                      |
| Input | `sUsername`           | `STRING`                                                   | MySQL database username                                                                |
| Input | `sPassword`           | `STRING`                                                   | MySQL database user password                                                           |
| Input | `sDatabase`           | `STRING`                                                   | MySQL database schema name                                                             |
| Input | `stServerInfo`        | MySql\_ServerInfo                                          | <p>MySQL-Server information which are stored in the<br>MySQL\_ServerInfo structure</p> |
| Input | `hInternalSocket`     | `RTS_IEC_HANDLE`                                           | <p>internal\_SocketHandle : \_\_XWORD;<br>// Socket handler</p>                        |
| Input | `internal_SemaBuffer` | `__XWORD`                                                  | sema buffer                                                                            |
| Input | `abTxBuffer`          | <p>ARRAY<br>\[0..gc\_MySQL\_dwTxBufferSize]<br>OF BYTE</p> | Transmit buffer                                                                        |
| Input | `abRxBuffer`          | <p>ARRAY<br>\[0..gc\_MySQL\_dwRxBufferSize]<br>OF BYTE</p> | Receive buffer                                                                         |


---

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