7 DEVICE SUPPORT BLOCK (DSB)
7.16.9 Guidelines for configuring Turck Excon DSB for gateway redundancy
To configure the Turck Excom DSB to know the gateway status and to command gateway switchover, you must
select the following PDCs and associate the corresponding net tag names.
Gateway Status - for the status of the gateway.
Gateway Command - for commanding switchover of the gateway.
If the gateway PDC types are not configured, the data available in the "Gateway Status/Command" group in the
Gateway Redundancy tab is invalid/not applicable. Similarly, if the gateway redundancy mode if "Off" then
the data in the "Redundancy Status" group in the Gateway Redundancy tab is invalid/not applicable.
You cannot associate a Gateway Status or a Gateway Command PDC to a PIOMB since these PDCs do not send
any process data to controller. If you try to associate a Gateway Status or a Gateway Command PDC to a
PIOMB, an error message appears.
It is recommended to configure the connection break suppression time longer than Watchdog time defined in the
master configuration. A good rule would be to configure the connection break suppression time as Watchdog time
+ 1 second.