Siemens SINUMERIK 802C base line Technical Manual page 45

Normal booting (Start-up switch position 0)
Booting with default machine data (Start–up switch position 1)
Booting with saved data (Start–up switch position 3)
Contrast control
SINUMERIK 802C base line
Start-Up
The control system changes to the JOG/Ref.point approach mode and the
yellow LED DIAG flashes (see Fig. 2–6).
This initial state is the precondition for error–free start–up of the control
system.
When the control system is already turned on, start–up is also possible in the
Diagnosis menu (see User Manual).
Result
User data exist, no boot
error
Data in user memory
faulty
The user memory area not loaded with default data is erased,
and the default machine data are loaded from the permanent memory into
the user memory.
The user data backed–up on the permanent memory are loaded into the
user memory.
See User's Guide "Operation and Programming"
Control system changes to
JOG/Ref.point approach mode,
yellow LED DIAG (see Fig. 4–1) flashes.
Backed–up user data are loaded from the
permanent memory into the user memory (as in
start–up switch position 3). If no valid user data
are in the permanent memory, the default data
are loaded (as in start–up switch position 1).
Any deviations from
displayed on the screen.
Result
Result
Start-Up
normal booting are
4-7