OPC90 Server
When the error detection log is enabled, OPC90 logs all errors returned to OPC
clients. It will also log all fatal errors encountered such as CIU communication
faults. The maximum size of the log file can be set in the range of 1 to 100
megabytes. When the log file reaches the maximum size it is closed and a new
one opened. Error logs are automatically deleted when they become older than
the number of days configured in the device property. The default setting is 7
days.
The response of the OPC GetStatus function is configurable from this dialog. It
can be enabled to return a failed server status when communication with all CIUs
is bad. When running in simulation mode the running in test mode status is
normally returned. This can be changed to return server running instead should
the OPC client(s) have problems with the test mode status.
The returned server status is often used by OPC clients to take corrective actions
such as connecting with an alternative OPC server if a faulty status is received.
OPC90 returns the following possible statuses.
PC_STATUS_RUNNING is the nO ormal expected return status. This will be
returned even when communication with the DCS is bad unless the “indicate fault
when CIU bad” option is enabled. If this option is enabled and CIU
communication is completely lost, the return status will indicate failure.
The RoviSys Company Version 7.0 Page 27
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