Figure 11-7 Configuration Of Hardware Interrupts For S7-1500 - Siemens SIWAREX WP321 Manual

Communication in SIMATIC S7-300/1200/1500
11.11 Hardware interrupts
Figure 11-7 Configuration of hardware interrupts for S7-1500
You can use the hardware interrupts to detect changes in the status of limits. The change in
status is entered in the interrupt OB as EventType:
PRAL #1 Limit 1 OFF → ON
PRAL #2 Limit 1 ON → OFF
PRAL #3 Limit 2 OFF → ON
PRAL #4 Limit 2 ON → OFF
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SIWAREX WP321
Manual, 07/2014, A5E33715669A-02