Siemens SINUMERIK 802C Manual page 47

Start-up switch(software)
In addition to the hardware start-up switch, the following functions can also be carried out in
the Diagnosis/Start-up/Start-up switch menu:
S
Normal power–up
S
Power–up with default machine data
S
Power–up with saved data
These power–up functions have a higher priority than the hardware start–up switch.
Booting the control system
When the control system is turned on for the first time, an initial state of the control system is
established automatically. All memory areas are initialized and are loaded with previously
stored default data.
The PLC area of retentive bit memories is explicitly erased.
The control system changes to the JOG/Ref.point approach mode and the yellow LED DIAG
flashes (see Fig. 2-9).
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).
Normal booting (Start–up switch position 0)
User data exist, no boot
error
Data in user memory
faulty
Booting with default machine data(Start-up switch position 1)
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.
Booting with saved data (Start-up switch position 3)
The user data backed-up on the permanent memory are loaded into the user memory.
Contrast control
See User's Guide "Operation and Programming"
SINUMERIK 802C
6FC5 597–3AA20–0BP2 (01.02)
4.2 Turning on and booting the control system
(Start-up switch position 0)
(Start-up switch position 1)
(Start-up switch position 3)
Result
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 normal booting are displayed on the screen.
Result
Result
Start-Up
4-47