I guess you can use the GENDAYS command to setup the period you need.
TWS use calendar and periods to setup scheduling dates for an application, so maybe alreaday exists in your OPC a period that satisfied your need.
My problem is that i`m the OPC/TWS admin in the enterprise.
I found the option that makes the applications runs every two hours. From the OPC`s main panel choose option 1.4.3 and type me application name.
After that did a B (browse) and then enter RUN command.
in there i select the period setup for my application. Then put an S in the period column. Now in this new screen i enter E command to exlpain...
and that it is! The option called REPEAT has 02:00 hours repetition coded.