System Initialization Program - Siemens SINUMERIK 840C Installation Instructions Manual

09.95
3.5.2

System initialization program

After the self diagnostics program has been run through, the system initialization
program is requested.
In its first section, the data required for running the organization program are set
up. This setting up includes:
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In the second section the system initialization program defines the type of start up
after switching on the mains voltage. The following points are checked:
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If the STOZUS identifier is set, the control remains in the STOP state.
If, in the second section, (testing of run-up after switching on the mains voltage)
the STOZUS identifier is not set, but one of the other conditions is fulfilled, an au-
tomatic cold restart is executed; a warm restart of the control only occurs if none
of the mentioned conditions are fulfilled.
Overall reset with subsequent bootstrapping of the user memory (ORLOE = 1) is
always required
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If the mains voltage fails during active processing checks, the processing checks
are aborted by the programmer. The system initialization program instigates the
cold restart.
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SINUMERIK 840C (IA)
Stack organization,
Segmentation for word processor and co-processor,
Entries in the location dependent CPU interrupt table,
Task priority lists,
Setting up task data,
Initialization of counts and periodic values.
Whether the switch-on test pattern is missing (i.e. data lost)
Whether there is a battery interrupt
If the setting-up bit is set
Request from the NC "automatic warm restart after setting-up overall reset"
STOZUS operating status bit set (acquisition of interupt event or continuation
of the STOP state, see Section 8)
Cold restart or warm restart attempt aborted.
If first setting up is instigated,
Data loss has occurred by removing the PLC CPU or, in the case of power
failure, due to simultaneous battery voltage failure.
After forced boot (SW 3 and higher)
3 PLC Installation
3.5.2 System initialization program
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