1756-M08SE模块1756-M08SE

1756-M08SE
1756-M08SE
1756-M08SE
模块：DCS系统所有I/O模块都带有CPU，可以实现对采集及输出信号品质判断与标量变换，故障带电插拔，随机更换。而PLC模块只是简单电气转换单元，没有智能芯片，故障后相应单元全部瘫痪。

现在的PLC与DCS的功能已经差不多，DCS对网络和分布式数据库还要定时扫描有较强的功能，同时对运算和模拟量的处量比较拿手。

PLC还分大、中、小、微PLC，其中微型的只卖几百块到2000块，点数也好少，大型的可以带数千点，运算能力与DCS差不多，但对多机联网功能较弱。现在两个技术平台都差不多，只是重点不一样。

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