Software programming
- 1. Chapter 1 The Easier Programming, the Better Project Even though every software engineers in automation field are familiar to software programming of PLC and HMI, there are some unexpected situation happens during operation. For example, instructions, formulas, parameters we programmed are all correct, there not exist external interference, and wiring and switch is normal, but the equipment does not work well, that is because of programming bug. It requires a certain step in accordance with the preparation of a reasonable operating mechanism to quantify the process of programming, which improves the flexible of programming and decreases bugs to make equipment runs well. SETP_Ⅰ、I/O Allocation------Logical allocation of I/O is the basic of programming ★Allocate the same function of Input and output together, as below picture showed:
- 2. It is good for programming, convenient to search and easy for wiring. ★X0、X1、Y0、Y1 can be reserved, if enough, for high speed counting and pulse output. ★As for emergency stop button, stop button, forward, back, rise,up, external switch is recommended for closed contacts and open contacts in programming. As a result that the equipment will not cause damage because of switch problem. ★The selection of Analog: current type is preferred. The on-site practicing proves that anti-jamming capability of current is almost 80% higher than Voltage. ★If possible, select analog type to control the third party device, because the analog response speed is much greater than the communication response speed.