Installing time-controlled operations

There are no IMS system definition parameters for time-controlled operations (TCO). Everything you need for TCO is automatically included when you install IMS.

In order to initialize TCO when IMS starts, include a DFSTCF DD statement in the IMS procedure. You can use the data set name IMS.TCFSLIB, or you can use another data set for your TCO scripts.

IMS defines two logical terminals for TCO: DFSTCF and DFSTCFI. These terminal definitions allow TCO input to appear as though it came from a terminal. You do not need to specify either LTERM name in your IMS stage 1 input. If you do, IMS issues a G979 message telling you that your stage 1 includes duplicate LTERM names.

You can call RACF® by specifying TCORACF=Y and call the Command Authorization Exit Routine (DFSCCMD0), if it exists. To sign on a user ID to IMS, you can add a /SIGN ON command at the beginning of the TCO script and a /SIGN OFF command at the end of the script. RACF checks all subsequent commands to determine if the signed-on user is authorized to issue the commands. The commands are then passed to the DFSCCMD0 exit routine.