System software support is essentially the same for both the battery
feature and the uninterruptible power supply attachment.
In some environments you may want to perform different actions when the
uninterruptible power supply begins supplying power to the system or when
power is fluctuating. A power-handling program can use any of the following
methods to handle these situations:
- Sending specific messages to interactive users
- Ending batch jobs and subsystems in preparation for powering down
- Dynamically changing the system values that control uninterruptible power
supply processing
- Issuing the PWRDWNSYS command to shut down the system
To specify that you have power handling programs, change the QUPSMSGQ system
value to the name of a queue you have created. The system will send the same
messages to both QSYSOPR and the queue you specified. Change the QUPSDLYTIM
system value to *NOMAX.
The program you use to handle the message queue must be active and must
allocate the queue. If a program has not allocated the queue that is specified
in QUPSMSGQ, the system will assume that no power handling program
exists.
This topic highlights what you need to do to use
a power-handling program for a system when a full uninterruptible power supply
is attached.