Machine Data and Incremental Dimensions
8-11
FM 351 Positioning Module
C79000-G7076-C351-02
Address Name Data
Type
Initial Value Description
80.0 MON_TIME DINT L#2000 Monitoring time
• 0 = No monitoring
• 1 to 100 000 ms
Based on the monitoring time, the module monitors the following:
• The movement of the axis up to the switch-off point.
The monitoring time starts at the beginning of a positioning operation and is restarted at each change
in the actual value in the direction of travel.
• The target approach.
The positioning operation must be completed within the monitoring time.
The monitoring time is triggered for the last time when the switch-off difference is reached.
• The plausibility of the actual values at the switching points.
Oscillation of the axis at the switching point leads to operating errors.
The value 0 deactivates the monitoring functions.
Actual monitoring time
For the monitoring time you can specify all values from the defined range.
• 0: The monitoring is deactivated.
• 1 to 100,000 ms: The FM 351 rounds the specified time up to a multiple of 8 ms (module cycle).
Ideally, you should therefore enter the monitoring time as a multiple of 8 ms.
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