品牌:GE | 規格:IC697ALG441 | 材質:IC697ALG441 |
產地:美國 |
IC697ALG441
IC697ALG441
IC697ALG441
用PLC實現模擬量控制是完全可能的。控制的單位值可小到212分之一的測量程值,多數也是足夠的。
PLC進行模擬量控制,還有A/D、D/A組合在一起的單元,並可用PID或模糊控制算法實現控制,可得到很高的控制質量。
用PLC進行模擬量控制的好處是,在進行模擬量控制的同時,開關量也可控制。這個優點是別的控制器所不具備的,或控制的實現不如PLC方便。
當然,若純為模擬量的係統,用PLC可能在性能價格比上不如用調節器。這也是應當看到的。
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