When the system console is in problem determination mode, the operator can issue any MVS™ command. To alter the message routing values for the system console, the operator can issue VARY, CONTROL, or MONITOR commands. Making changes to system console attributes through commands allows the operator flexibility in controlling message processing for the system console during problem determination mode. MVS commands can be issued from the system console regardless of its operating mode. For example, using the VARY command during problem determination mode, the operator can redefine routing codes for the system console without having to reIPL the system.
When the operator removes the system console from problem determination mode, the system stores the command changes to the console attributes. If the operator activates problem determination mode again from the system console during the same IPL, the system uses the console attribute changes it has stored instead of the values defined in CONSOLxx. See Example of controlling problem determination mode for the system console.