Technical data

4.4.3
Comparison of the
Different Restart
Types
System program
performs
COLD RESTART WARM RESTART RETENTIVE COLD
RESTART
manual automatic manual automatic manual automatic
Evaluation of:
- DB 1
- DB 2
- DX 0
- DX2
yes
yes
yes
yes
yes
yes
yes
yes
no
no
no
no
no
no
no
no
no
no
no
no
no
no
no
no
Initialization of:
- DB 0
- 9th track
- Disable/
enable
interrupts
- Cycle
statistics
no
1)
yes
yes
yes
no
1)
yes
yes
yes
no
1)
no
no
no
no
1)
no
no
no
no
1)
no
yes
no
no
1)
no
yes
no
Deletion of:
- Timed job
- Delay
interrupt
- ISTACK/
BSTACK
- Process image
of the inputs
- Process image
of the outputs/
digital I/O
- Analog I/O
yes
yes
yes
yes (com-
pletely)
yes (com-
pletely)
yes
yes
yes
yes
yes (com-
pletely)
yes (com-
pletely)
yes
no
yes
no
no
no
no
no
yes
no
no
no
no
no
yes
yes
no
yes (acc. to
9th track)
no
no
yes
yes
no
yes (acc. to
9th track)
no
Table 4-2 Comparison of the different restart types
4
RESTART Mode
CPU 928B Programming Guide
C79000-B8576-C898-01
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