If the above three steps are not found any problems, then check all circuits. Whether the wire circuit breaker view appears, especially the wire groove whether due to pull is line groove cut off. Check whether there is damage to the crease of trachea. Check the hydraulic oil pipe is blocked.

In this step to check the circuit, to use the essential multimeter, transferred to the buzzer stalls, channel check circuit. If the airway appear serious creases, replace immediately. As to replace the hydraulic oil pipe.

The above steps in ensuring there is no mistake, the fault is likely to emerge in the controller, but is never a problem of program! First of all, don't is certainly controller destroyed, as long as there have been no serious internal short circuit, controller has the short circuit protection, short circuit will not generally burned controller.

First, check whether there is a high frequency interference device in near controller. If have, immediately move. If outdoors, high intensity of lightning may cause the controller to work in a moment can not be normal. At this time, first remove all possible jamming equipment, and then restart the controller.

Secondly, if the restart is invalid, check the controller wiring whether there is loose, a bad situation.

Finally, if the wiring correct. To determine whether the PLC memory card problem. The replacement of a new card, download, check whether the previous memory card fault.