PLC automatic control is widely used in electrical automation and intelligent control. Electric power operators know that in addition to inputting the established program, PLC automatic control also requires wiring the input and output ports of the PLC itself. Only when the PLC program instructions are correct and the input and output ports are correctly wired, can the PLC perform automatic control.
In addition, PLC can accept both switch quantity control and analog quantity control, and the two can be converted to each other. Today we will focus on the external wiring of PLC and how switch quantity signals and analog quantity signals are converted:
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Recommended ReadingLatest update time:2024-11-16 09:47
Common wiring of PLC input and output terminals
At present, PLC is a highly used centralized control device in industrial production and automation control. PLC has replaced heavy relay cabinets, AC contactor cabinets, etc., and has gradually become popular in production and control. The correct wiring of PLC is a prerequisite for PLC to function. It is necessary
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Detailed explanation of PLC input point saving method
Introduction
It is generally believed that the number of input points is determined by the number of system input signals. However, in actual applications, the purpose of saving PLC input points can be achieved through the following measures, which are introduced below using the FX1N series PLC.
Meth
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Ten ways to start and stop Siemens PLC with a single button (TIA Portal 1200/1500 PLC)
10 Design Methods for Siemens TIA Portal 1200/1500 PLC Single Button Start/Stop Control
The first one:
Second type:
The third type:
The fourth type:
Fifth:
Sixth type:
Seventh:
Eighth:
Ninth type:
The
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How to use PLC to realize the positioning function of encoder
Strictly speaking, the encoder will only tell you how to position and execute. It needs to rely on controllers such as PLC or stepper motors to achieve positioning. The encoder is like a person's eyes, knowing that the motor shaft or load is at a certain position. The industrial encoder is generally photoelectric en
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Five communication methods of Siemens PLC
1. PPI Communication
PPI protocol is the most basic communication method of S7-200 CPU. It can realize communication through its original port (PORT0 or PORT1) and is the default communication method of S7-200 CPU.
2. RS485 serial communication
Most third-party devices support it. Siemens S7 PLC c
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Detailed explanation of the common instructions of Mitsubishi PLC
Mitsubishi PLC (Programmable Logic Controller) is a control device widely used in the field of industrial automation. It controls mechanical equipment through programming and has the characteristics of high reliability, high flexibility and easy operation. This article will introduce the common instructions of Mitsu
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Types and characteristics of PLC ladder diagram programming language
PLC ladder diagram programming language is a programming language used to write automation applications. Its name comes from the shape of the ladder diagram, each ladder represents a logical function block. Ladder diagram programming language is a graphical programming language with the advantage of being easy to un
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Mitsubishi PLC deceleration stop
Mitsubishi PLC stop processing priority
The priority order of QD75 stop processing is as follows:
Slow down and stop, stop suddenly, stop immediately
(1) During deceleration (including automatic deceleration), even if the deceleration command turns on or a deceleration stop factor occurs, the op
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