# Connection Functions

Connection functions allow you to manage connections on the inSCADA platform with script/expression. With these functions you can run, stop and check the status of connections.

## Get Connection Status

#### String ins.getConnectionStatus(String connectionName)

Provides information about the status of a connection.

connectionName: The connection name.

Return Value: Returns a string containing information about the connection status. ("Connected","Disconnected")

#### Syntax

```javascript
var status=ins.getConnectionStatus("Connection_01");
if (status==="Disconnected") {
    ins.notify("error","Connection 01","Connection 01 is fail");
}
```

#### String ins.getConnectionStatus(Integer connectionId)

Returns information about a connection status.

connectionId: The ID of the connection.

Return Value: Returns a string containing information about the connection status. ("Connected","Disconnected")

#### Syntax

```javascript
var connectionId=1;
var status=ins.getConnectionStatus("Connection_01");
if (status==="Disconnected") {
    ins.notify("error","Connection 01","Connection 01 is fail");
}
```

{% hint style="info" %}
ConnectionId is a unique registration number in the database on connections in the inSCADA Platform. It is not displayed on the platform. However, this information can be taken from value expression using the self expression (self.connectionId). This allows you to write expressions that can check the overall connection status.
{% endhint %}

## Start Connection

#### startConnection(String connectionName)

Starts a connection.

connectionName: The connection name.

Return Value: Does not return any value.

```javascript
if (ins.getConnectionStatus("Connection_01")==="Disconnected") {
    ins.startConnection("Connection_01");
}
```

## Stop Connection <a href="#stop-connection" id="stop-connection"></a>

#### stopConnection(String connectionName) <a href="#stopconnection-string-connectionname" id="stopconnection-string-connectionname"></a>

Stops a connection.

connectionName: The connection name.

Return Value: Does not return any value.

#### Syntax

```javascript
if (ins.getConnectionStatus("Connection_01")==="Connected") {
    ins.stopConnection("Connection_01");
}
```