Software limit switches

Software limit switches are used to limit the travel range of an axis. Monitoring of the software limit switches can be activated and configured in the configuration of the software module during startup. The drive must be referenced to allow for monitoring the software limit switches.

If software limit switch monitoring is enabled, the following response will be triggered depending on the active operating mode as soon as the configured positive or negative limit switch position is exceeded:

• Jog mode, position controlled (100)
• The drive stops at the software limit switch position using the deceleration specified via PO 12. If "Limit switch fault response" is enabled, the error message E30.01/02 "Positive/negative limit switch hit" is issued.
• Positioning mode (400, 1200, 1201)
• If a target position is specified that is beyond a software limit switch position, no travel job is executed when the drive is stationary. If it is not stationary, the drive stops with the deceleration set in the application limits. The error message E140.30 "TargetPositionOutOfSWLS" is output.

Error messages can be reset using PO 5.8 "Fault reset". First, specify a direction of rotation or a target position in the direction of the valid software limit switch range. If you wish to move the drive outside the range limited by the software limit switches, you have to disable the software limit switches using the PO 1:12 signal.