IFM CR711S, Original Programming Manual

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ifm Programming Manual ecomatController/60-1 (CR711S) Operating System V2.5.0.n 2017-12-19
System description Hardware description
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Watchdog
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The watchdog has multiple levels:

IEC task-related watchdog
This watchdog works in the ifm operating system and is executed in each CPU core. Each task is
monitored individually.
If an error occurs, the system only deactivates the affected PLC and the corresponding outputs.
Error class = B

External watchdog
If an error occurs, this watchdog puts the entire system into the "safe state" (emergency stop). The
output groups change to logic "0".
Error class = A
→ chapter
Error classes
To eliminate the fault:
► Rebooting the PLC is necessary via voltage on/off.
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Configure IEC watchdog
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► Familiarise yourself with the following CODESYS functions!

Watchdog:
→ Online help > CODESYS Development System > Programming Applications >
Task Configuration > Creating a Task Configuration > Tab 'Configuration'

Task configuration:
→ Online help > CODESYS Development System > Programming Applications >
Task Configuration
To configure the IEC watchdog of a task:
► Open task configuration (→ Configure task processing (→ p. 80 ))
► Activate watchdog with option field [Enable]
► Enter watchdog [Time]
► Set [Sensitivity]
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Watchdog is configured
The watchdog time must be shorter than the interval time.
The watchdog time must be longer than the runtime of the task.
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