z/VM: System Messages and Codes Š CP - z/VM - IBM

Wait States
Control Program (CP) Enabled and Disabled
CP enters both enabled and disabled wait states. CP enters an enabled wait state
when it is waiting for work. CP enters a disabled wait state when system operation
is terminated due to an error or when system shutdown is complete. z/VM service
programs, such as HCPLDR, enter a disabled wait state when they terminate.
When CP or one of its service programs enters a disabled wait state, it loads a wait
state code into the program status word (PSW). The PSW is 16 hexadecimal digits
long. This PSW will appear on the operator’s console, at the end of the wait state
message you receive.
Where to Find the Disabled Wait State Code
For a description of what the disabled wait state code means and suggested
actions to take, look up the CP message that has the same number as the wait
state code. The format of the disabled wait state PSW is shown below:
xxxxyyyy zzzzwwww
where:
xxxx 000A - a disabled wait state
yyyy 0000
zzzz 0000
wwww
is the disabled wait state code. This disabled wait state code is a CP
message number except for the following situations:
Wait States
1. CP loads wait state 0FFF after shut down when either a timeout is
specified for SHUTDOWN or the default signal timeout is not zero. The
default signal timeout is set with the SET SIGNAL SHUTDOWNTIME
command or system configuration file statement.
2. The operator specifies the wait state code by using the WAIT operand
on the SHUTDOWN command. The WAIT operand allows any hex
value from 0000 to FFFF.
Chapter 2. System Codes 133