A System Of Testing PLC And Peripheral Equipment

Hardware and software designs of PLC control system often need to be debugged again and again. Typically, you need to debug the PLC system in the industrial field, and to make consequential amendments for the problem in laboratory. And then, debug again in industrial field. The debugging will receive good results in that way. Therefore, each debugging must be in the field, and the system will have to be modified in laboratory. It will take a large price which may affect the production schedule in the debugging process.It is unlikely to provide a industrial environment for the PLC system debugging for students'PLC study in school, which caused only PLC simulation software program syntax is correct, and by the subjective to determine whether the PLC function of the system are realized, so that the effect of learning discounted.The system of testing PLC and peripheral equipment test includes hardware which is made up of MCU and peripheral devices and software in PC to simulate the industrial environment . The main function of the hardware circuit is to provide hardware interface circuit for the systems and PLC, that is required to provide PLC A/D input and acceptance from the PLC A/D output; and test system for PLC and PC software, the data between transfer. PC software main role is to test the system by receiving the data sent to the form of a simple chart reflects the PLC system to simulate the working state, whereby you can know whether the original PLC program to achieve the established requirements, to some extent achieved PLC systems in the laboratory on site debugging purposes, and may the teaching and training on the PLC to provide a great convenience. The PC software is designed by LabVIEW , it has good communications. The microcontroler's software is written by Keil C.