The OPCAPOST command processor calls EQQUSINT, which passes the completion code to the
TWS Tracker in this system.
The TWS Tracker forwards the
completion code to the system running the Controller through the mechanism used by OPC/ESA. Figure 1 shows the flow of this process. Figure 1. OPCAPOST Command Processor
Other functions use the OPCAPOST command. See OPCAPOST for
documentation on the syntax.
This module completes the processing for this specific TWS operation.
If the request executes successfully, TWS Automation sets
the TWS operation
status to C (completed) and normal TWS-dependency
control allows the next operation to start. See the CPU_25 batch job
in Figure 1. If the
operation completes in error, TWS Automation sets
an E status and a 4-character return code. The application does not
continue processing until some intervention occurs. An operator or TWS Automation’s recovery
can sometimes provide this intervention.
