Specifying the time-of-day clock and the JES subsystem

The system prompts the operator to set the date and time-of-day (TOD) clock and to start the job entry subsystem. You can

Control if the operator needs to set the date and time by using CLOCKxx.
Start JES automatically by using IEFSSNxx.

You can specify CLOCKxx and IEFSSNxx in IEASYSxx, and then specify the IEASYSxx member in LOADxx. Thus, depending on how you define values for your Parmlib members, the operator does not have to be prompted during initialization to set the clock or start JES. Using LOADxx is thus a good way to automate the initialization procedure for your system and simplify the process for your operators.