易卖工控网(www.ymgk.com)提供”PMA323BE HIEE300308R1 模块”,产品详情:品牌/厂家:ABB、型号:PMA323BE HIEE300308R1、成色:全新、货期:现货 1天内发货、保修:180天,更多产品详情就上易卖工控网。
A large number of intermediate relays and time relays are used in the traditional relay control system.It is prone to failure due to poor contact contact.PLC replaces a large number of intermediate relays and time relays with software,leaving only a small number of hardware components related to input and output,and the wiring can be reduced to one tenth to one percent of the relay control system.Failures are greatly reduced.
PLC uses a series of hardware and software anti-interference measures,has strong anti-interference ability,the average time between failures reaches more than tens of thousands of hours,can be directly used in industrial production sites with strong interference,PLC major users are recognized as the most reliable One of the industrial control equipment.
System design,installation,debugging workload is less
PLC replaces a large number of intermediate relays,time relays,counters and other devices in the relay control system with software functions,which greatly reduces the design,installation and wiring workload of the control cabinet.
The PLC ladder diagram program can be designed with the sequential control design method.This programming method is very regular and easy to master.For complex control systems,if the correct design method is mastered,the time to design the ladder diagram is much less than the time to design the circuit diagram of the relay system.
The user program of the PLC can be simulated and debugged in the laboratory,the input signal can be simulated with a small switch,and the status of the output signal can be observed through the PLC light-emitting diode.After the installation and wiring of the system are completed,the problems found in the on-site adjustment process can generally be solved by modifying the program,and the debugging time of the system is much less than that of the relay system.
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