Technical data

Result - ACCU-1-L: contains the status information:
= 0
→ Program processing level has not been
called
≠ 0 → Program processing level has been
activated
- ACCU-2-L: contains the previous contents of ACCU-1-L;
the previous contents of ACCU-2-L are lost
Possible errors none
Example
You want to ignore a timeout during the COLD RESTART, however, not in
the remaining program processing levels.
Call special function organization block OB 228 at the beginning of OB
23 to check whether program processing level COLD RESTART (number 02) is
active or not when a QVZ (timeout) occurs. You can make the reactions to
the error dependent on the status information you obtain as follows:
ACCU 1= 0: COLD RESTART not active QVZ has
not occurred in
COLD RESTART, but in another
program processing level
Error handling program must be
executed
ACCU 1
≠ 0: COLD RESTART activated QVZ has occurred in COLD RESTART
QVZ can be ignored
Using OB 228, you can differentiate between various error situations.
6
OB 228: Reading Status Information of a Program Processing Level
CPU 928B Programming Guide
C79000-B8576-C898-01
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