Installation guide

Console Hardware 1-5
The control panel keyswitch (see Figure 1-2) has the following settings:
Disable Removes 48 VDC power from the system. Power is still
supplied to the cabinet control logic (CCL) module.
Secure Prevents entry into console mode; position used while
machine executes programs.
Enable Allows entry into console mode; position used while
machine executes programs.
Restart A momentary switch position, used to reinitialize the
system; causes self-test to start running.
The control panel indicator lights, when lit, indicate:
Key On Power is supplied to entire system; the blower is running.
Run Lit when the primary processor is running the operating
system or user programs; off when the primary processor
is in console mode.
Fault Fault on LSB, XMI bus, or an I/O bus. Flashes during
power sequencing or when errors are detected.
The signals for the control panel Run light, the console terminal, and the
power system UARTs are carried by the system bus. A processor that is in
console mode can perform I/O directly to the console terminal.
For more information:
Operations Manual