Limiting positions

To prevent collisions, monitoring and limiting positions can be activated in the form of software limit switches and position lag monitoring.

Limiting positions 1:

No safety functions in the sense of safety technology

Purely functional settings are explained in this section; these are not safety functions in the sense of safety technology.

Activating the software limit switches

If the software limit switch monitoring is activated for the axis, the axis does not move beyond the set position (max./min. end position).

Limiting positions 2:
Limiting positions 3:

Limiting positions 4:

Activation steps:

1. Select the NC axis for which you wish to activate the software limit switches.
2. Open the Parameter dialog for this NC axis.
3. Set the value TRUE for the parameter Limit Switches: Soft Position Limit Minimum Monitoring.
Use the corresponding drop-down box in the table column Offline Value.
4. Set the value TRUE for the parameter Limit Switches: Soft Position Limit Maximum Monitoring.
Use the corresponding drop-down box in the table column Offline Value.
5. Use the Limit Switches: Minimum Position parameter to set a value for the smallest position value that can be approached that allows sufficient freedom of movement and excludes the possibility of a collision.
6. Use the Limit Switches: Maximum Position parameter to set a value for the largest position value that can be approached that provides sufficient freedom of movement and eliminates the possibility of a collision.
With the next Activate configuration you have activated the software limit switches for the selected NC axis.

Activating the position lag monitoring

The position lag monitoring function checks whether the current position lag of an axis has exceeded the limit value. The lag distance is the difference between the set value (control value) and the actual value reported back. Here, monitoring takes place both at standstill and during the movement of an axis.

Limiting positions 5:

Limiting positions 6:

Limiting positions 7:

Activation steps:

1. Select the NC axis for which you want to activate position lag monitoring.
2. Open the Parameter dialog for this NC axis.
3. Set the value TRUE for the parameter Monitoring: Position Lag Monitoring.
Use the corresponding drop-down box in the Offline Value table column.
4. Use the Monitoring: Maximum Position Lag Value parameter to set a value for the maximum permissible lag distance that provides sufficient control freedom and eliminates the possibility of a collision.
The default value is usually suitable.
5. Set a value for the parameter Monitoring: Maximum Position Lag Filter Time that provides sufficient control freedom and excludes the possibility of a collision.
The default value is usually suitable.
With the next Activate configuration you have activated the position lag monitoring for the selected NC axis.