Error and system messages
4.5 Evaluating the interrupts of the ET 200S
IM151-1 FO STANDARD interface module (6ES7151-1AB05-0AB0)
Manual, 02/2010, A5E01075965-03
57
Triggering a diagnostic interrupt
When an incoming or outgoing event (e.g., a wire break) is registered, the module triggers a
diagnostic interrupt if "Enable: Diagnostic interrupt" is set.
The CPU interrupts processing of the user program and processes the OB 82 diagnostic
block instead. The event that triggered the interrupt is entered in the OB 82 start information.
Evaluating hardware interrupts with
STEP 7
When a process interrupt occurs, the CPU interrupts the processing of the user program and
processes the OB 40 process interrupt block.
The module channel that triggered the process interrupt is entered in the start information of
OB 40, in the OB40_POINT_ADDR variable. The figures below show how the local data
double word 8 is assigned to the bits.
Process interrupts in electronic modules 2DI DC24V HF and 4DI DC24V HF:
/% /% /% /%
/'
',
',
5LVLQJHGJHFKDQQHO
5LVLQJHGJHFKDQQHO
5LVLQJHGJHFKDQQHO
5LVLQJHGJHFKDQQHO
%LWQR
Figure 4-13 OB 40 start information: The event that triggered the process interrupt for digital input
modules
Process interrupts for 2 AI U HS, 2 AI I 2WIRE HS and 2 AI I 4WIRE HS electronic modules:
/%
/%
/'
/%
/%
/RZHUOLPLWXQGHUVKRWFKDQQHO
%LWQR
8SSHUOLPLWXQGHUVKRWFKDQQHO
/RZHUOLPLWH[FHHGHGFKDQQHO
8SSHUOLPLWH[FHHGHGFKDQQHO
Figure 4-14 OB 40 start information: The event that triggered the process interrupt for analog input
modules
You will find a description of OB 40 in the System and Standard Functions Reference
Manual for S7-300 /400 (http://support.automation.siemens.com/
WW/view/en/1214574).
Triggering a insert/remove module interrupt
Insert/remove-module interrupts are supported in DPV1 mode. The CPU interrupts
processing of the user program and processes diagnostic block OB 83 instead. The event
that triggered the interrupt is entered in the OB 83 start information.
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