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产品展示 》 ABB 》 REF615C模块备件使用方法

REF615C模块备件使用方法

型号:REF615C

联系人:肖经理
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控制规模代表PLC控制能力,看其能对多少输入、输出点及对多少路模拟进行控制。控制规模与速度有关。因为规模大了,用户程序也长,执行指令的速度不快,势必延长PLC循环的时间,也必然会延长PLC对输入信号的响应。为了避免这个情况,PLC的工作速度就要快。所以,大型PLC的工作速度总是比小的要快。控制规模还与内存区的大小有关。规模大,用户程序长,要求有更大的用户存储区。同时点数多,系统的存储器输入、输出的信号区(输入输出继电器区或称输入、输出映射区)也大。这个区大,相应地内部器件(解释见后)也要增多,这些都要求有更大的系统存储区。控制规模还与输入、输出电路数有关。如控制规模为1024点,那就得有1024条I/O电路。这些电路集成于I/O模块中,而每个模块有多少路的I/O点总是有数的。所以,规模大,所使用的模块也多。控制规模还与PLC指令系统有关。规模大的PLC指令条数多,指令的功能也强,才能应付对点数多的系统进行控制的需要。控制规模是对PLC其它性能指标起着制约作用的指标;也是PLC划分为微、小、中、大和特大型5.3组成模块PLC的结构虽有箱体及模块式之分,但从质上看,箱体也是模块,只是它集成了更多的功能。在此,不妨把PLC的模块组成当作所有PLC的结构性能。
REF615C模块备件使用方法 REF615C模块备件使用方法
The control scale represents the control ability of PLC. It depends on how many input and output points it can control and how many analog circuits it can control. The control scale is related to speed. Because the scale is large, the user program is long, and the speed of executing instructions is not fast, it is bound to prolong the PLC cycle time, and it is bound to prolong the PLC response to the input signal. In order to avoid this situation, the working speed of PLC should be fast. Therefore, the working speed of large PLC is always faster than that of Small PLC. The control scale is also related to the size of the memory area. Large scale and long user program require a larger user storage area. At the same time, the number of points is large, and the signal area of memory input and output (input and output relay area or input and output mapping area) of the system is also large. This area is large, and the internal devices (see explanation later) will also increase, which requires a larger system storage area. The control scale is also related to the number of input and output circuits. If the control scale is 1024 points, there must be 1024 i/o circuits. These circuits are integrated into i/o modules, and there are always a number of i/o points in each module. Therefore, the scale is large and there are many modules used. The control scale is also related to the PLC instruction system. The large-scale PLC has a large number of instructions and strong functions, so it can meet the needs of controlling the system with many points. Control scale is an index that restricts other performance indexes of PLC; PLC is also divided into micro, small, medium, large and extra large 5.3 modules. Although the structure of PLC can be divided into box and module, from the qualitative point of view, the box is also a module, but it integrates more functions. Here, it is advisable to regard the module composition of PLC as the structural performance of all PLCs.

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