1. First, you need to specify the signal that needs to be kept constant or disconnected. These signals can be input signals or output signals.
2. Secondly, it is necessary to define these signals in the program and set their initial states. For signals requiring Hengtong, the initial state should be ON; For signals that need to be disconnected constantly, the initial state should be disconnected.
3. Then, it is necessary to set delay control in the program to keep these signals constant or unchanged. Specifically, it can be realized by using controls such as timers or counters.
4. Finally, it is necessary to set an exception handler in the program in order to deal with faults or errors in time.
The reason is that Hengtong Constant Interrupt Program can effectively ensure the stability and reliability of PLC system. By keeping some signals in constant or off state, accidents can be avoided in the process of system operation, thus ensuring the normal operation of the system. At the same time, Hengtong Constant Interrupt Program can also improve the response speed and performance of PLC system, making it more flexible and reliable.
In addition, there are some other factors to be considered when writing a constant interrupt program. For example, pay attention to the readability and maintainability of the program, and try to use meaningful variables and comments to explain the function and function of the program; The security and stability of the program should also be considered to ensure that the program will not cause adverse effects on the system.