The importance of PLC programming for electricians is self-evident, and many electricians become PLC masters because they have mastered certain programming methods and steps. This article will show you how to write PLC programs, and you can become a PLC master by completing the following steps.
The input and output ports of the PLC are an important bridge between the program and the outside world. When writing this part of the program, PLC experts usually choose to use auxiliary relays instead of the X and Y of the input and output. The advantage of this is that when an input or output needs to be modified, only one thing is needed to be modified, without having to make extensive changes to the entire program.
At the same time, they will also set two modes of automatic execution and manual execution in the program of the output port. The manual execution mode allows individual parts of the device to be single-stepped, which is very helpful for commissioning and maintenance of the equipment.
In PLC programming, start, stop, and emergency stop are the three basic and important procedures. The PLC master will first write these three programs to provide convenience for subsequent program writing such as automatic programs, manual programs, fault prompts, shutdown alarms, etc. In this way, they can add and refine the program's features step by step.
After completing the basic program, the PLC master will start writing the autorun framework. They will only write the framework process in order to sort out the running process of the entire organization. Doing so helps them better understand and control the operating processes of the equipment.
On the basis of the automatic operation framework, PLC experts will write the execution of automatic processes for individual components and individual mechanisms one by one. In this way, they can add the various mechanisms of the equipment cycle to the program step by step to ensure the stable operation of the equipment.
In the process of writing a program, it is inevitable to encounter various points of failure. PLC experts will centralize these fault points so that they can be quickly located and dealt with when a device fails or a fault registration is written. At the same time, they will also focus on these fault points when writing the manual, so that users can better understand and deal with the fault when using the equipment.
For programs involving axes, PLC experts will write program points such as joging, zeroing, and axis points. In automatic operation, they also handle the logic associated with the operation of the cylinder, ensuring that the cylinder can move according to the preset trajectory and speed.
In modern industrial automation systems, data communication and processing are crucial. PLC experts will write communication data processing and data collection programs in order to realize data exchange and sharing between equipment and other systems. In this way, they can better monitor and control the operating status of the equipment and improve the operational efficiency of the equipment.
In order to facilitate the subsequent debugging and maintenance work, the PLC master will write a debugging program or a program program. These programs include a wide range of possible functional options, making commissioning and maintenance easier and more efficient.
For the logic processing related to the operation of the cylinder, the PLC master will detect the limit timeout and the cycle time of the single mechanism execution. For cylinders that involve positioning, they also handle the logic of the execution of the cylinders in the limited stabilization section to ensure that the cylinders can accurately reach the preset position and maintain stable operation.
In order to improve the readability and maintainability of the program, PLC experts will try to adopt a modular approach. They modularize the various inspection functions to make the program structure clearer, easier to understand and maintain.
In order to facilitate the management and maintenance of the program, the PLC master will write the entire program in blocks and sub-institutions. Each block has its own reset function, which makes the program more stable and reliable during operation.
In modern industrial automation systems, touch screens, as an important interface for human-computer interaction, are crucial for users. The PLC master will write the touch screen screen program to realize the human-computer interaction function between the device and the touch screen. In this way, users can intuitively understand the operating status and operation information of the equipment through the touch screen, improving the ease of use and user experience of the equipment.
Through the analysis and analysis of the above steps, we can see the rules and skills that PLC masters follow when writing programs. These tips and rules not only help to improve the performance and stability of the program, but also help to improve the efficiency of programming and maintenance. Therefore, it is very necessary for friends who are interested in becoming PLC masters to learn and master these skills and rules.