Download CPU 31xC: Technological functions - Service, Support

Positioning with digital outputs
4.2 Parameter configuration
Monitoring Time Parameter
Parameters
Value range
Monitoring time

0 to 100 000 ms
Default
2000
 0 = No monitoring
Rounded up by the CPU in 4-ms
steps.
The CPU uses this monitoring time to monitor
● actual value of the position
● target approach
Actual value and target approach monitoring is switched off when the value is set to "0".
Actual Value Parameter
Parameters
Actual value monitoring
Value range

Yes

No
Default
Yes
The moving axis must cover a distance of least one pulse in specified direction within the
monitoring time.
Actual value monitoring is switched on at the start of a run. It remains active until the cut-off
position is reached.
Actual value monitoring is switched off when the monitoring time is set to "0".
The run is canceled when the monitoring facility responds.
The CPU does not detect the failure of a digital input. You can enable actual value
monitoring for indirect detection of encoder or drive failure.
Target Approach Monitoring Parameter
Parameters
Value range
Target approach monitoring

Yes

No
Default
No
The axis must reach the target range within the monitoring time after it has reached the cutoff position.
Target approach monitoring is switched off when the monitoring time is set to "0".
CPU 31xC: Technological functions
Operating Instructions, 03/2011, A5E00105484-05
107