plc畢業(yè)設(shè)計(jì)中英文翻譯-plc設(shè)計(jì)-文庫(kù)吧資料
2025-01-27 06:47本頁(yè)面
【正文】 ant parameters of PLC, they are determining the working speed of PLC, IO quantity and capacity of software,etc., so is exercising restraint in controlling the scale . I/O module The interface of PLC and electric return circuit , finished through inputting the output (I/O ). I/O circuit of I/O module integrated PLC, it is input temporarily the storing device reflects the state of the input signal, export and click and reflect that exports the state of the latch. Input module vary electric signal digital signal enter PLC system , output module to be opposite. I/O is divided and imported (DI) for the switch amount, the switch amount is exported (DO), analog quantity is input (AI), analog quantity is exported (AO),etc. the module . Commonly used I/O is classified as follows: Switch amount: Divide according to the voltage level, there are 220VAC , 110VAC , 24VDC , divide according to the way of isolating, there are relays that are isolated and isolated with the transistor. Analog quantity: Divide according to the signal type, the electric current type (420mA , 020mA ) , voltage having type (010V, 05V, 1010V),etc.,it is according to precision fen, there is 12bit , 14bit, 16bit ,etc.. Besides abovementioned IO in mon use , there is special IO module , for instance such module as thermal resistance , electric thermocouple , pulse ,etc.. Is it confirm module specification and quantity to count according to I/O, I/O module but many and very little, its great number receive CPU can basic ability of disposition of management most, namely is counted the restriction by the biggest baseplate or the framework trough . Power module PLC power is used for offering the working power for integrated circuit of every module of PLC. Meanwhile, some still offer the working power of 24V for inputting the circuit. The type is as follows, that the power imports Exchange the power (220VAC or 110VAC ), direct current power (a monly used one is 24VDC). The baseplate or the framework Most module type PLCs use the baseplate or the framework, its function is: Have electrically, realize the connection among every module , enable CPU to visit all module on the baseplate, on machinery , realize the connection among every module , make every module form a whole . Other equipment of PLC system 1. programming equipment: The programmable device is that PLC develops and adopts, monitors operating, checks and maintains the indispensable device, used in programming , do some settlement , working state controlling the system that PLC and PLC control to the system, but it does not participate in directly and control and run live . The small programmable device PLC generally has holding type programmable device, generally the puter (operates the programming software ) makes programmable device at present. That is to say we system go to location plane. Manmachine interface: The simplest manmachine interface is indicator lamp and button, the liquid crystal reject (or the touchsensitive screen ) an anic whole type operator39。s procedure and data according to the function that the systematic procedure of PLC gives, gathered and input the state
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