PLC performs analog control,and there are units combined with A/D and D/A,which can be controlled by PID or fuzzy control algorithm,which can obtain high control quality.The advantage of using PLC to control the analog quantity is that the switch quantity can also be controlled while the analog quantity is being controlled.This advantage is not available in other controllers,or the realization of control is not as convenient as PLC.Of course,if it is a purely analog system,using a PLC may not be as good as using a regulator in terms of performance and price.
PLC进行模拟量控制,还有A/D、D/A组合在一起的单元,并可用PID或模糊控制算法实现控制,可得到很高的控制质量。用PLC进行模拟量控制的好处是,在进行模拟量控制的同时,开关量也可控制。这个优点是别的控制器所不具备的,或控制的实现不如PLC方便。当然,若纯为模拟量的系统,用PLC可能在性能价格比上不如用调节器。
1970-72 CHEVY&OLDSMOBILE N.O.S.SORENSEN TS-45 TEMP. GUA
1969-72 GMC TRUCK N.O.S.SORENSEN TS-45 TEMP. GUAGE SWIT
1971-72 BUICK-PONTIAC N.O.S.SORENSEN TS-48 TEMP. GUAGE
1973-74 OLDSMOBILE N.O.S.SORENSEN TS-48 TEMP. GUAGE SWI