6ES7416-2XL01-0AB0西门子

6ES7416-2XL01-0AB0西门子6ES7416-2XL01-0AB0西门子

PLC的三种编程语言的特点介绍 
1．梯形图编程语言
梯形图沿袭了继电器控制电路的形式，它是在电器控制系统中常用的继电器、接触器逻辑控制基础上简化了符号演变来的，形象、直观、实用。
梯形图的设计应注意以下三点：
（一）梯形图按从左到右、从上到下的顺序排列。每一逻辑行起始于左母线，然后是触点的串、并联接，zui后是线圈与右母线相联。
（二）梯形图中每个梯级流过的不是物理电流，而是“概念电流"，从左流向右，其两端没有电源。这个“概念电流"只是形象地描述用户程序执行中应满足线圈接通的条件。
（三）输入继电器用于接收外部输入信号，而不能由PLC内部其它继电器的触点来驱动。因此，梯形图中只出现输入继电器的触点，而不出现其线圈。输出继电器输出程序执行结果给外部输出设备，
当梯形图中的输出继电器线圈得电时，就有信号输出，但不是直接驱动输出设备，而要通过输出接口的继电器、晶体管或晶闸管才能实现。输出继电器的触点可供内部编程使用。

郑娟萍

厦门仲鑫航自动化设备有限公司

2．语句表编程语言
指令语句表示一种与计算机汇编语言相类似的助记符编程方式，但比汇编语言易懂易学。一条指令语句是由步序、指令语和作用器件编号三部分组成。
3．控制系统流程图编程图
控制系统流程图是一种较新的编程方法。它是用像控制系统流程图一样的功能图表达一个控制过程，目前电工协会(IEC)正在实施发展这种新式的编程标准。Allen Bradley 1771-IK/1771IK Encoder Revision D01
 
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Allen Bradley 2700-IM1/2700IM?1 Interface Module
 
Allen Bradley 1747-L20A/1747L?20A Ser C Frn 6
 
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Allen Bradley 1756-IB32/1756I?B32 Series B DC Output Mod...
 
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*SEALED*Allen Bradley 1794-OA16/1794O?A16/1794-0A16/1?794...
 
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Allen Bradley 1794-ASBLT/1794?ASBLT Series D
 
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Allen Bradley 1771-OND/1771ON?D Output
 
Allen Bradley 1791-16BC/17911?6BC Series B exc condition
 
Allen bradley 1785-LT/1785-LT?B/1785LT/1785LT?B
 
Allen Bradley 1794-OA8I/1794O?A8I/1794-0A8I/1?7940A8I SE...
 
Allen Bradley 1747-L20C/1747L?20C Ser B Frn 4
 
Allen Bradley 1771-ODD/1771OD?D Ser B, Revision D01 Outp...
 
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Allen Bradley 1772-LSP/1772LS?P Mini Processor
 
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Allen Bradley 1771-IFE/1771IF?E Analog Input Series C Re...
 
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Allen Bradley 1771-DCM/1771DC?M Series B NICE!!!
 
Allen Bradley 1771-DCM/1771DC?M Series B NICE!!!
 
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Allen Bradley 1775-LX/1775LX PLC-3 Expansion Module
 
Allen Bradley 1747-L20E/1747L?20E Series B Frn 4
 
Allen Bradley 1771-OJ/1771OJ Rev B Expander
 
Allen Bradley 2801-YF/2801YF Machine Vision Camera
 
Allen Bradley 1771-OJ/1771OJ Rev D03 Expander
 
Allen Bradley 1772-LW/C-1772L?W/C Mini Processor
 
Allen Bradley 1771-ALX /1771ALX I/O adapter Rev C
 
Allen Bradley 1778-ICC Input Module
 
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Allen Bradley 1771-OFC/B 1771OFC Analog Output
 
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Allen Bradley 1771-IKC /1771IKC Encoder Counter Module
 
Allen Bradley 1772-SD2/1772SD?2 Ser A Firm Rev 3
 
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*SEALED* Allen Bradley 1794-OB16/1794O?B16/1794-0B16/1?79...
 
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Allen Bradley 1756-IG16/1756I?G16 Control Logix Input Re...
 
Allen Bradley 1794-IF4I/1794-?IF41/1794IF4I/1?794IF41 Inp...
 
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Allen Bradley 1778-IBC DC Input
 
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Allen Bradley 1756-CNB/1756CN?B Series D
 
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Allen Bradley 1771-ISC/1771IS?C Multiplexor Input