Use the operating mode to determine the number of
options that are presented to the operator for consideration during and after
the initial program load (IPL). It can also secure (lock) the control panel
to prevent an unauthorized or inadvertent IPL from the control panel.
There are four operating modes:
- Normal (unattended)
- After the power-on, operating the system in Normal (unattended)
mode requires no operator intervention during the IPL.
When you turn on
the system in normal mode, it performs the IPL and presents the Sign On display
on all available display stations. The operator cannot change the system during
the IPL. Dedicated service tools (DST) and the operating system do not present
any displays during this IPL.
Use a normal mode (unattended) IPL to
perform the following actions:
- Perform an IPL and run the system for most routine work
- Perform a remote IPL
- Turn on and perform an IPL by date and time
-
- Manual (attended)
- After power-on, operating the system in Manual (attended)
mode means that an operator uses the control panel to direct the system for
special needs.
During manual mode IPL, DST and the operating system present
menus and prompts that allow you to make changes to the internal system environment.
This can include entering debug mode for service representatives to diagnose
difficult problems.
Use manual mode to IPL and run the system to perform
the following actions:
- Change IPL options (including system values)
- Install the operating system
- Load fixes (PTFs)
- Make some types of system hardware upgrades
- Use DST (for advanced users and service only)
- Problem diagnosis (for advanced users and service only)
-
- Auto (automatic)
- Use Auto mode for an automatic remote IPL, automatic
IPL by date and time, and an automatic IPL after a power failure.
-
- Secure
- Use Secure mode to prevent use of the control panel
to perform an IPL. This mode is not a form of IPL; it is a means to prevent
an unauthorized or inadvertent IPL from the control panel.