Handling uninterruptible power supply conditions when no power-handling program exists

 

You might need to change some system values when you do not have a power-handling program. These are considerations when you do not have a power-handling program to handle controlled system shutdown.

You can specify that you do not have a power handling program by using the default for the QUPSMSGQ, which is QSYSOPR. When you use the default, the system sends all power-related messages to QSYSOPR. You should set the QUPSDLYTIM to something other than *NOMAX.

Normally, you do not supply power to the workstation devices. When utility power is interrupted, the system remains active, but the workstation jobs typically end abnormally. If utility power is restored while the system is operating on the uninterruptible power supply, the system remains active and the workstation jobs can be restarted.

If the QUPSDLYTIM timer ends or the weak battery signal occurs, the system saves main storage and turns off. Select a value for QUPSDLYTIM that is appropriate for your uninterruptible power supply and your system size.

If the system is powered down while on uninterruptible power supply, the QPWRRSTIPL determines whether an IPL is performed when utility power is restored. The default is to not perform the IPL.

 

Parent topic:

Controlled shutdown concepts

Related concepts
Enabling a power-handling program to control system activity during a power interruption Uninterruptible power supply message queue system value (QUPSMSGQ) Uninterruptible power supply delay time system value (QUPSDLYTIM) Power restore IPL system value (QPWRRSTIPL)