Rockwell Automation T8030S Trusted OPC Server Package - Manual (Page 26)

Trusted
TM
OPC T8030S
Issue 23 April 10 PD-T8030S 26
2.7. Reserved Variables
The OPC Server provides summary data on each Controller.
The tagnames below are built in the following format.
The name of the server, as configured in the System Preferences tab (OPC Root
name). By default this is TrustedEthernetIF.
The name of the controller, as configured in the Controllers tab. By default these are
Controller0, Controller1, Controller2 etc.
2.7.1. Controller Information
The following OPC tags are automatically available at the Controller level.
.._OPC_COMMS_FAILURE_1
(and _OPC_COMMS_FAILURE_2 if two communications ports were defined)
This is used to indicate the status of the controller to server connection. ‘Off’ indicates that the
connection is working, and ‘On’ indicates a failure. Type Boolean.
.._OPC_SERVER_HEARTBEAT_
This is a counter that changes from 0 to 59 at a rate of one change per second. This can be used to
periodically ensure that the server is still functioning correctly. Type Integer.