The contact of the origin switch may be stuck and unable to move, and it is necessary to check and repair the problem of the contact being stuck.
The origin block may not be able to press the origin switch to the action position, and the position of the block needs to be adjusted to ensure that the switch can be pressed.
The origin switch may have poor contact due to water ingress, and it is necessary to check and address the water ingress issue to ensure good contact between the contacts.
The origin switch circuit may be disconnected or the input signal source may be faulty. It is necessary to check the circuit connection and signal source status and repair or replace them.
PLC input point burned out
Reasons and measures:
Clean the stuck area to ensure that the moving parts can move smoothly, or choose to replace the travel switch.
Adjust the installation position of the travel switch so that its zero point switch contact can be smoothly pressed by the stopper, thereby triggering the switch action.
Replace the damaged travel switch and take waterproof measures to prevent further damage.
Check the switch circuit to confirm if there are any open circuits, short circuits, or signal source issues.
If necessary, replace the input points on the I/O board and make corresponding modifications to the parameter settings and PLC program.