EMERSON 1C31179G02  远程输入/输出模块

1C31179G02图形式指令结构：程序由图形方式表达，指令由不同的图形符号组成，易于理解和记忆。系统的软件已把工业控制中所需的独立运算功能编制成象征性图形，用户根据自己的需要把这些图形进行组合，并填入适当的参数。1C31179G02在逻辑运算部分，几乎所有的厂家都采用类似于继电器控制电路的梯形图，很容易接受。如西门子公司还采用控制系统流程图来表示，它沿用二进制逻辑元件图形符号来表达控制关系，很直观易懂。较复杂的算术运算、定时计数等，一般也参照梯形图或逻辑元件图给予表示，虽然象征性不如逻辑运算部分，也受用户欢迎 

明确的变量常数：图形符相当于操作码，规定了运算功能，操作数由用户填人，如：K400，T120等。PLC中的变量和常数以及其取值范围有 

主营产品：

.法国....施耐德.. 140莫迪康昆腾系列处理器,内存卡,电源模块等。
..德国...西门子..Siemens MOORE,S5,S7,6DD等
..美国...通用电气..GE..IC693/IC697系列
..美国 ...Westinghouse（西屋）： OVATION系统、WDPF系统、WEStation系统备件。
..德国...Bosch Rexroth（博世力士乐）：Indramat，I/O模块,PLC控制器,驱动模块等。
..美国... Motorola（摩托罗拉）：MVME 162、MVME 167、MVME1772、MVME177等系列。

Instruction structure in graphical bbbb: the program is expressed in graphical bbbb, and the instructions are composed of different graphical symbols, which is easy to understand and remember. The software developer of the system has compiled the independent operation functions required in industrial control into symbolic graphics. Users combine these graphics according to their own needs and fill in appropriate bbbbbeters. In the logic operation part, almost all manufacturers adopt ladder diagram similar to relay control circuit, which is easy to accept. For example, Siemens also uses the flow chart of the control system, 1C31179G02which uses the graphical symbols of binary logic elements to express the control relationship, which is very intuitive and easy to understand. More complex arithmetic operations and timing counting are generally represented with reference to ladder diagram or logic element diagram. Although they are not as symbolic as logic operations, they are also popular with users

 Explicit variable constant: the graphic symbol is equivalent to the operation code, which specifies the operation function, 1C31179G02 and the operands are filled in by the user, such as k400, T120, etc. The variables and constants in PLC and their value ranges are