What input module plc automatic control system

input module plc is equivalent to the machine 's brain , we compiled the program is equivalent to the knowledge of people hold grip and rules .
The machine equivalent to the human body, used to  pulse input module plc perform various operations of the PLC .
Electricity, gas, liquid, etc. is equivalent to human muscle and nerve , PLC issued a directive by electricity, gas, liquid , such as the energy to the machine , the machine will perform .
The external sensor feedback to PLC, equivalent to the human eye , nose , etc., will be back to things outside the brain .
That is to take a person or animal analogy , PLC is the brain , PLC combined with the machine equivalent combination of the  Programmable Output Module human brain with the body , but inside the human brain is much more complex process than the PLC , but the people sensitivity and accuracy of the brain is not as PLC. PLC application in China is growing very rapidly. With the rapid development and continuous improvement of basic automation level of China's economy over the next period of time PLC in China will maintain high growth momentum.
When applied to generic PLC equipment can think of it is an embedded controller, but relatively general embedded controller plc IO module  and PLC side has higher reliability and better stability. Some users had encountered in practical work with embedded controllers , is now being gradually replaced by embedded controllers PLC with generic or customized PLC.

Analog input and output modules at different points plc cpu modules Module

You say that your sensor with analog output, analog input, (meaning the module is to convert your voltage or current value to digital, then the table can be calculated by the slope of your current temperature or pressure.)
If you want to read when the temperature or digital input plc  pressure values, plc cpu modules that you have a sensor with analog output and analog output. So if you buy an analog module, connect the analog module with PLC, analog output and input with sensor modules connected (of course there are a wiring diagram so you do not have to worry about the module). When through the power after the sensor module automatically checks the current value after converting it into digital, it you calculate the slope of the  micro smart plc slope according to the formula sheet, so that you will be able to know a current value of the temperature or pressure. Digital input and output signals that switch signal, 1 or 0, analog signals, there are two kinds of voltage or current signal, typically pass over the transmitter  plc module signals, such as pipe pressure detected by the pressure transducer, it will output an analog signal 4 - 20ma or 0-10V signal to the PLC, PLC for data processing.

output module plc analog input and output modules

Central Standing Committee in the position control system uses servo motors and stepper motor as the drive unit. To adopt open-loop control , closed-loop control can also be used . For stepper motor, we can use to adjust the speed of change in the mechanical transmission pulse operating speed . Use FX series PLC, positioning plc ethernet module  pulse output in the form of units or modules , you can achieve positioning point or points . Here pulse output module and positioning control module FX2N series .
( A ) the pulse generator pulse module to complete a positioning unit independent axis , which is specified by the number of pulses to provide a servo or stepper motor drive amplifier to achieve. Only for the FX2N sub-series , with the industrial plc  FROM / TO instruction set various parameters , positioning readout value and speed . The module occupies 8 I / O points . The output pulse train up to 100KHZ 's .
( 2 ) positioning controller for the pulse sequence output unit , which is the plc program logic controller  single-axis positioning unit , not only can handle single-speed positioning and interrupt positioning, and can handle complex control . Such as multi-speed operation. FX2N-10GM can have up to eight connected to the FX2N series PLC. The maximum output pulse is 200KHZ.
( 3 ) positioning controller can control two axes. Perform linear interpolation, circular interpolation , or a separate two-axis positioning control , the maximum output pulse train is 200KHZ ( During interpolation, up to 100KHZ)

output module plc analog input and relay output modules problems

Upper and lower limits of analog input values ​​are set to 20 and 0 , had  plc analog io module everything normal, in the absence of the analog signal access , the software displays a value of 0 , there is signal access , they also have a normal display, but under normal use two or three days , the upper and lower limits remain unchanged, the analog input value in the absence of wiring is 6.8 , all the channels I have tried are 6.8 , then the company gave me a new simulation input module , installed after the beginning is normal, but it is the same problem in a couple of days later , I ask an expert what causes ? Urgent
Also this PLC as well as a relay output module , 2, 3 and 4-channel connection of solenoid valves, found often there will be a problem , sometimes when I start solenoid valve, status lights all of a sudden relay plc cpu modules  output modules are extinguished , the network does not pass if the output has an inductive load , inductive load at the moment there pass off thousands fleeing negative voltage power module and power module fleeing after each power unit , causing damage to electrical components . So best to separate inductive load power . I had always felt that the problem is not , then burned two PLC know, sometimes it is really necessary to separate power supply.

How to choose the output module plc input and output interface module type

PLC is an industrial control system, it is the object of industrial production control equipment or industrial processes , industrial work environment field . Its links with the industrial production process  digital output plc is through I / O interface module to achieve.Through the I / O interface module can detect various parameters controlled production process , and these field data as control information on the controlled object . While the I / O interface module of the processing result to the controller or industrial processes controlled device , thereby driving the various actuators to achieve control. PLC information collected from the scene and outputs a control signal to external devices are required to go through a certain distance , in order to ensure that the information is correct , PLC 's I / O interface module has better anti-interference ability . According to actual needs , under cpu modules  normal circumstances , PLC has a number of I / O interface modules , including digital input module , digital output modules , analog input module , analog output modules as well as some other special modules should be used according to their selected features .

PLC controller works

Although the ladder program used by many PLC often use such as relays, timers and counters name, but not the internal PLC entities have the hardware , but in the memory and logic control programs do programmatically edit and output elements borrowed from the connect an external china industrial automation plc entity controlled mechanical device to do . So can greatly reduce the space required for hardware controllers . PLC ladder program execution actually works is the first progressive ladder code to scan and read into the CPU and finally perform control operations. Throughout the scanning process includes three steps , "Input status check ", " run " , "Output status updates " as follows:Step one " input status check ": PLC First check the status of each point switch or sensor inputs connected components of ( 1 or 0 for on or off ) , and its status is written in the corresponding memory location Xn. Step two " running " : progressive ladder program will take into the CPU operation , if the program is running you need to enter the contact state , CPU direct inquiries removed from memory. Operation result is stored in the output coil plc analog output modulesmemory location corresponding to withhold response to the output Yn. Step Three "Output status update " : the step two of the output status update to the PLC output unit contacts , and return to step one . This third step is called the PLC scan cycle , and the time required to complete the PLC called the reaction time ,the time of the PLC input signal if the reaction time is less than this , there is the possibility of misreading . After each run the next time the program before execution , output and input status will be updated once, so this mode of operation as an output , said input of " the end of the regeneration program ."

output module plc plc domestic market due mostly occupied by foreign products

The first is technology, in the rapidly evolving international situation plc, the majority of our plc manufacturers also do not own independent intellectual property rights, to participate in international competition PLC products, one of which is the development of strength is not plc digital input output module  enough. Although capital investment, production and quality management and other factors also account for a very large proportion, but the quality of the product plays a decisive role in the R & D investment, R & D results and products of the production process and so on. The technology is permeated with which every aspect of the development of core technologies plc, the follow-up product development, technological level of the production process is to determine the quality of products, how to  output module plc further enhance their strength in technology, domestic brands will gain market key to competitive advantage.
Followed by the competition, because most of the domestic market plc occupied by foreign products, large and medium-sized plc products, almost all monopolized by a few big foreign companies, as China continues to expand the use of plc market, several major foreign companies almost every year for the market introduction of new products, once the user using the new product, they plc analog output  will gradually raise the market price, if the country does not own independent intellectual property rights, competition in the economy can only be in a passive position. So domestic plc manufacturer must have their own independent research and development of products, the only way to compete in an invincible position in the market.

The main job of the output module plc

SCM can be used to direct the development of control systems, but very demanding for the developer (not the general level capable of ) , long development cycles, high costs ( for some large decency you need to Nanda plc power supply module  do a little experiment , a printed circuit board requires a considerable the cost , you can say you use the emulator to develop experimental board , but I have to tell you , do you just verify the feasibility of hardware and software , does not mean that can be used in industrial control systems, industrial control systems because Immunity requirements for very high stability first , rather than the performance of the first , so you must constantly  Nanda plc input output modules test the circuit board design , improvement ) when you solve these problems, you will find that you have done a PLC , of course, If you need to use someone else can easily use the software you'll need a set , so you may not need to tell others about your circuit ( you can not tell anyone ) .
       Many people feel very mysterious PLC , PLC is actually very simple , in addition to its internal CPU speed , the Nanda Programmable Output Module  other functions not as common microcontroller . PLC usually uses 16 or 32-bit CPU, serial communication with the outside world with a channel or two , and has an internal timer can , to improve the reliability plus a watchdog timer is enough .

How to use the input module plc 's multi- segment level setting , display, alarm and automatic level control

In many production areas , it is often necessary to tanks , storage tanks, pools and other containers of liquid level monitoring to the usual traditional relay -contact control , multi- use hard-wired electrical  plc manufacturer appliances , poor reliability, high degree of automation , has there are many enterprises to adopt advanced controller to transform the traditional exposure control , greatly improving the reliability and automation level of the control system , providing a more reliable production guarantee. This paper describes a programmable controller (PLC) A method for monitoring liquid level , its simple circuit structure and low investment ( Available renovation of existing facilities ) , not only a high degree of automation control systems , but also has online modify the function , flexibility, suitable for Nanda cpu module plc  multi- level monitoring applications.
1 . Control requirements
The control system can be based on the needs of production is divided into multi- level set , and segment display , when the minimum level to start automatically when you add liquid feed pumps , liquid level reaches the set value audible alarm and stop the pump ; the operator can turn plain by the OK button to lift the alarm sound , flashing lights ; system with manual / automatic control modes , and a test function.
2 . PLC Selection
In this case , select the PLC PLC should consider the cost performance , high reliability, choice , quite , load capacity suitable , affordable PLC. This article introduces the four level control object , for example, according to analysis and comparison of a variety of plc input output modules  factors and control system input and output points requirements.
3 . System hardware configuration
To achieve the level of manual / automatic control, you need to enter the mouth 12:00 , 8:00 outlet , use C20P 20点PLC I / O unit , optically isolated input and output isolation relays , load capacity ; liquid level detection using Reed tube sensor , manual / automatic conversion , run / test conversion and level settings using double- knob manually start the pump , the pump stops and confirmation test using normally-open button ; selection of electronic sound alarm output and 24V DC lights, relays . See Figure a hardware configuration diagram

output module plc in control system

Programmable controller (Programmable Logic Controller) referred to a PLC or PC, is developed from the early relay logic control system, which constantly absorbing micro- computer technology to  Nanda analog output plc continuously enhance the functionality gradually suitable for complex control tasks.
 PLC viable reason is that it is more suitable for industrial field and market requirements : high reliability , simple and strong anti- interference of various programming installation, low price and long life. Than the microcontroller, its input and output ports closer to the field devices , without adding too much of the middle part or need more interfaces , so saving the plc input output modules  user time and cost. PLC lower end (input side ) of the relay , a transistor and thyristor control means for the user while the upper end is usually a microcomputer . When people use it , you can not carry out specialized training in computers , programmable controllers can be operated and programmed. Used to perform a variety of different levels of complexity of industrial control tasks. It began with a wire connected to it subtly with switching devices constitute or use different logic control sequence control . So far, the PLC programming languages ​​- Ladder can also see the shadow of the wiring . Until the late 1960s , early 1970s, the advent of the programmable controller , with the rapid development of microelectronics technology, computer technology and data communications technology, and the emergence of the  plc soe module microprocessor , PLC products towards small and ultra- miniaturization conducted a leap , and finally to the early PLC from the initial logic control, sequence control , PLC has developed into a modern logic, timing, counting , memory and arithmetic operations , data processing, communications and networking functions such as PID loop controller .

input module plc simple classification

PLC switch input and output modules can be roughly divided into two types:
One is connected to the host using the flat line, there is a cable

connected to the host using communications.
The latter is actually a complete switching measurement and control

modules, communication cables used to plc analog output module  obtain input switch status and

control commands issued by the control switch output. Contains an internal

microprocessor to achieve more complex, if you are familiar with the

microcontroller, you can try.
The former is relatively simple, its measurement and  lc soe module control are actually

done in the host, input and output modules essentially completed only two

things:
1, the input switch signal conditioning
Switch conditioning is the easiest conditioning circuitry, easy to

implement.
2, the output switch driver
Switch output driver is basically relay driver  plc programmable circuit, but also easy to

implement.
PLC is now mainly used mostly imported, not the actual complexity and

digital input and output modules are relatively simple modules, encourage

yourself or with a domestic brand!

output module plc and core have to do with the thread

Logical processor is threaded, is called a logical processor should he processor is not complete, as you can understand the basic structure of the execution unit of the processor.
Dual-core 4 thread is hyperthreading, his plc analog input output module  understanding is not dual-core simulation into four core, he is to be a core integrated two logical processors that two execution units. So that he can be like four-core processors in addition to four-threaded task, overwhelmingly in support of multi-core tasks are to support Hyper-Threading, but the dual-core 4 thread is always a dual-core processor.
Here to explain the core is there a more complex combination consisting of multiple parts, he does not just consist of the plc soe module  processing unit, the core processing unit contains something + L1, L2 + + instruction processing unit clock generator and so on. Hyper-Threading is to integrate the two core execution units.
Also you say FX6100 is a 6 core 6 threads, the plc manufacturer  current AMD processors do not use hyperthreading.

some simple instructions output module plc 's

You say that your sensor with analog output , analog input , ( meaning the module is to convert your voltage or current value to digital, then you can calculate the slope of the current form of the temperature or pressure . )
If you are asked to read the temperature or plc analog input  pressure values ​​, you must sensors with analog outputs and analog outputs. So you buy a simulation module , connect the analog module with PLC, analog output and input sensor is connected with the module ( module wiring diagram of course you do not have to worry about this ) . When the pass on the power after the current value of the module automatically detects the sensor and then convert it to digital, you calculate a formula based on its slope slope table , so plc analog io module  you can know the current value of the temperature or pressure . The same output is a voltage or current signal wiring relationship with you , then the output current is the current line , then the line voltage is the output voltage. Temperature can be equipped with PT100, if needed pressure with pressure transmitter (4-20mA output ) , then select the range to be based on the meter .
What is the analog of the PLC are the same, as long as the project based on the amount of data can be transformed .
In addition , many of the instruments have a plc temperature module  communication function or frequency output, which could save an AD module connection is also convenient.

plc IO module status of the industrial sector in general and the reasons behind

Our automation industry chain two - the underlying field instruments (especially transmitters and actuators), the upper integrated automation software is the weakest link. Our own design and manufacture of PLC micro smart plc  smart transmitters only 9% of the domestic market. Top-level control software integrated weak, partly because the characteristics of the process of industrial enterprise users do not understand the profound lack of accumulated experience, thereby constraining the top-level integration capabilities and the ability to quickly enter the market segments (industrial enterprises subject to state on design enterprise qualifications prescribed threshold is also one reason). User market for their industrial technologies / products do not agree, restricted the practice of self-developed industrial product PLC plc digital input output module  improvement opportunities.
For these reasons, domestic control system is difficult to enter the critical major projects, the core, the main equipment, the majority of this market is still a monopoly of foreign industrial control systems.
(B) for the majority of discrete factory automation PLC system, the situation is not optimistic.
 The current scope of application of PLC technology, in addition to covering a large chemical, electric power companies in almost all PLC plc cpu modules  industries. However, the current application of PLC market, more than 95% are occupied by foreign products, domestic enterprises absolute disadvantage.
Three) PLC system hard-reliance, industry, research and development platform is missing.
First, their enterprises and institutions, small scale, decentralized operations, not thrive.