The PLC fault in the packaging machine is mainly due to the contact adhesion of the output point relay. If the motor is controlled at this point, the fault phenomenon is that after the signal starts the motor, the motor runs, but after the stop signal is sent, the motor does not stop running. When the PLC is powered off, the motor stops running. If this point controls the solenoid. The fault phenomenon is that the solenoid valve coil is continuously energized and the cylinder is not reset. If an external force strikes PLC to separate the adhesion points, it can help to judge the fault. There are two ways to maintain it. One is to use a programmer to modify the program, change the damaged output point to the standby output point, and adjust the line at the same time. If 1004 points of the control solenoid valve are damaged, change to 1105 points as the standby point. Use programmer to find 1004 related statements, keep (014) 01004 is keep (014) 01105. The 1002 point of the control motor is damaged, it is changed to the standby point 1106, and the 1002 point related statement out01002 is changed to out01106, and the line can be adjusted at the same time. This method is more convenient and simple. If there is no programmer, the above method can not be used. The following methods can be used to remove the PLC and remove the PLC to remove the output relay of the standby point and replace it to the damaged output point. It is more troublesome to install according to the original wire number.
It's better to pay attention to the maintenance of your own packaging machine at ordinary times, so that there will be fewer failures. The maintenance methods are as follows: 1. Check regularly every time to remove the foreign matters on the end face of the transverse heat sealing copper block, and no scaling is allowed, otherwise, the heat conductivity will not drop, the temperature of the copper block will increase, and the transverse heat sealing heat sealing and cutting bag will not be normal. 2. Check all moving parts and lubrication condition regularly every time, and add enough 20 lubricating oil or lubricating grease at any time. Otherwise, the service life of the machine will be seriously affected. 3. When the equipment is out of use, the residual liquid in the pipeline shall be washed with clear water in time, otherwise the quality of the next product will be affected after the residual liquid deteriorates. If necessary, the infusion plastic pipe shall be brushed with a brush, and the machine shall be cleaned in time to keep dry and tidy. This will prolong the life of your packing machine and reduce unnecessary troubles.
