
SIMATIC Instructions
9-143
S7-200 Programmable Controller System Manual
C79000-G7076-C233-01
Stop, End, and WDR Example
SM5.0
.
.
.
M5.6
.
.
.
When an I/O error is detected,
force the transition to STOP mode.
When M5.6 is on, retrigger the
Watchdog Reset (WDR) to allow
the scan time to be extended.
When I0.0 is on,
terminate the main program.
Network 1
LD SM5.0
STOP
.
.
.
Network 15
LD M5.6
WDR
.
.
.
Network 78
LD I0.0
END
Network 1
Network 15
Network 78
STOP
WDR
END
LAD STL
FBD
.
.
.
I0.0
Network 1
Network 15
Network 78
STOP
WDR
SM5.0
M5.6
END
I0.0
When an I/O error is detected,
force the transition to STOP mode.
When M5.6 is on, retrigger the
Watchdog Reset (WDR) to allow
the scan time to be extended.
When I0.0 is on,
terminate the main program.
Figure 9-51 Example of Stop, End, and WDR Instructions for LAD, STL, and FBD
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