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Download Siemens HB 131. 10 B Technical data
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OB 228: Reading Status Information of a Program Processing Level Result Possible errors - 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 none Example 6 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 ACCU 1 ≠ 0: COLD RESTART activated QVZ has not occurred in COLD RESTART, but in another program processing level Error handling program must be executed QVZ has occurred in COLD RESTART QVZ can be ignored Using OB 228, you can differentiate between various error situations. CPU 928B Programming Guide C79000-B8576-C898-01 6 - 99
