Gateway Communication Driver-specific system items
- Last UpdatedAug 19, 2024
- 1 minute read
The following system items refer to specific information regarding Gateway Communication Driver. The Gateway Communication Driver-specific systems items are available only at the following hierarchy levels: ArchestrA data source, OPC groups, DDE/SL topics, and InTouch data source.
|
System Item Name |
Type/ Access Rights |
Description |
Values |
|---|---|---|---|
|
$SYS$Gateway |
Boolean/ |
Indicates whether Gateway Communication Driver has established a successful connection to the configured data source and topic (if any). |
True, False True: Connected to the data source |
|
$SYS$Gateway |
String/ |
Indicates whether Gateway Communication Driver has established a successful connection to the configured data source and topic (if any). |
Connected, Disconnected |
|
$SYS$Reconnect |
Boolean/ Read/Write |
Triggers a reconnect attempt to the configured data source. If you poke a value of 1 (True), this functionality is exercised even if the maximum number of reconnects is reached. By default, this item reads zero (0, False). Writing False does nothing. |
True, False True: Triggers reconnect attempt. If data source is already connected, it is disconnected and then reconnected. False: Does nothing. Default value. |
|
$SYS$OPCUpdate |
DWORD/ Read/Write |
Indicates the update interval, in milliseconds, of the connected OPC server. This particular system item is available only in the OPC group. |
0…2147483647 If 0 is specified, then the fastest update interval supported by the OPC server is used. |
|
$SYS$MQTTIsLicensed |
Boolean/ Read |
Indicates if a valid license is present for the MQTT connectivity. |
0, 1 0: No valid license exists. 1: Valid license exists |