Siemens ET 200pro Operating Instructions Manual page 197

Evaluating process interrupts using STEP 7
If there is a process interrupt, the CPU interrupts the user program and processes the
process interrupt block OB 40.
The module channel that triggered the process interrupt will be written to the
OB40_POINT_ADDR variable in the start information of OB 40.
For a description of the OBs 40, refer to the System and Standard Functions for S7-300/400
(http://support.automation.siemens.com/WW/view/en/1214574) Reference Manual.
Process interrupts of electronic module 8 DI DC 24V High Feature
The figure below shows the assignment to bits of the local data double word 8 in the start
information of OB 40.
Figure 9-1
Process interrupts with electronic modules 4 AI U, 4 AI I
The figure below shows the assignment to bits of the local data double word 8 in the start
information of OB 40.
Figure 9-2
Triggering a swapping interrupt
DPV1 mode supports swapping interrupts. The CPU interrupts the user program and
processes the diagnostics block OB 83. The interrupt triggering event is logged in the start
information of OB 83.
ET 200pro distributed I/O system
Operating Instructions, 03/2013, A5E00335544-08
Interrupts of 8 DI DC 24V High Feature
Interrupts for analog input modules
Alarm, error and system messages
9.1 PROFIBUS DP
197