The sorting system requires the slit pole plate to be introduced into the weighing and sorting area by the conveyor belt, the proximity sensor detects the pole plate and transmits the signal to the PLC, which sends out a trigger signal to the manipulator. The robot firstly moves vertically to absorb the pole plate, then moves horizontally to the left, places the pole plate in the weighing module for weighing, and the weighing module transmits the weight signal to the ACPU at the same time, and then the robot receives the trigger signal from the PLC, carries out the identification and positioning, and again moves vertically to absorb the weighed pole plate from the weighing module. Then it moves horizontally to the left or to the right, recognizes different horizontal limit switches according to the trigger signal, and completes the placement of the pole plate to the pole plate box. At the same time, the CPU counts the number of qualified pole plates of different weight levels. When the number of pole plates in the pole plate storage box reaches the detection range of the proximity switch, the proximity switch will send out a signal to inform the system that the number of pole plates of a certain level or several levels has reached the upper limit, and the operator should carry out the replacement of the pole plate box in time. The production process requires the control system not only to be able to automatically identify and transmit various input and output signals, but also to have a perfect warning function, and to enable the actuator to accurately locate and complete the corresponding action.

The touch screen has a strong man-machine operation dialogue function, all kinds of control commands need to be sent to the PLC through the touch screen, so as to realize the corresponding control and debugging of the system.PLC's outputs are mainly the corresponding warning lights and manipulators and so on.

Software system design, touch screen operation and robotic action

According to the function to be completed by the inspection machine and the actual production process of the action sequence and interrelationships, draw part of the functional flow chart. And combined with the production control requirements to write a ladder diagram. After successful debugging of the program downloaded to the programmable controller, the polar plate sorting weight parameters and control instructions sent to the PLC through the touch screen.

Sorting scale is mainly composed of PLC microprocessor, digital signal, weighing platform, conveyor module and communication processor and other programming equipment. In order to solve the contact competition problem in the traditional contactor and relay control mode, the PLC control system adopts cyclic scanning mode of operation, which realizes centralized sampling and output. PLC and input/output system adopts optoelectronic isolation, output interlocking, fault display and other measures; the power supply and input/output circuits adopt various forms of filtering, and the power supply can be automatically adjusted and protected; and good shielding measures are selected for the microprocessor to improve the system's anti-jamming resistance. The microprocessor uses good shielding measures to improve the system's anti-interference ability and stability of operation.