S5-115F Manual Addressing
5.5.4 Programming Example
The digital module with process interrupt generation has the initial module address ”8”.
Input 0 is an interrupt input that responds to a falling
* pulse edge. FB 12, in which output byte 13
is overwritten with FF
H
, is called by an interrupt request at this input.
Input 1 is an interrupt input that responds to a falling
* pulse edge. FB 13, in which output byte 13
is overwritten with FF
H
, is called by an interrupt request.
OB 21 and 22:
Initializing interrupt input enable and edge
generation
STL Meaning
LKH** 0303
TPW 8
BE
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OB 2:
Evaluating the interrupt request
Reading the interrupt byte
Updating the PII
STL Meaning
LPY9
TIB9
A I 9.0
JC FB 12
A I 9.1
JC FB 13
BE
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FB 12:
Loading QB 13
STL Meaning
Name: Case A
L KH 00FF
TQB 13
BE
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FB 13:
Loading QB 14
STL Meaning
Name: Case B
L KH 00FF
TQB 14
BE
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* In safety-related programs, interrupt inputs must be initialized with a falling edge only.
** This value can be entered as bit pattern KM 00000011 00000010 in the case of larger programmers.
EWA 4NEB 811 6148-02
5-15
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