這樣，用PLC實(shí)現(xiàn)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(shù)也是足夠的。

PLC進(jìn)行模擬量控制，還有A/D、D/A組合在一起的單元，并可用PID或模糊控制算法實(shí)現(xiàn)控制，可得到很高的控制質(zhì)量。

用PLC進(jìn)行模擬量控制的好處是，在進(jìn)行模擬量控制的同時，開關(guān)量也可控制。這個優(yōu)點(diǎn)是別的控制器所不具備的，或控制的實(shí)現(xiàn)不如PLC方便。

當(dāng)然，若純?yōu)槟M量的系統(tǒng)，用PLC可能在性能價(jià)格比上不如用調(diào)節(jié)器。這也是應(yīng)當(dāng)看到的。

3.3用于運(yùn)動控制

實(shí)際的物理量，除了開關(guān)量、模擬量，還有運(yùn)動控制。如機(jī)床部件的位移，常以數(shù)字量表示。

運(yùn)動控制，有效的辦法是NC，即數(shù)字控制技術(shù)。這是50年代誕生于美國的基于計(jì)算機(jī)的控制技術(shù)。當(dāng)今已很普及，并也很完善。目前，先進(jìn)國家的金屬切削機(jī)床，數(shù)控化的比率已超過40％～80％，有的甚至更高。

備貨，備貨，降降降，火火火，火火火……
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CACR-SR05AZ1SR-Y4
CACR-SR05BA1AM  
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CACR-SR05BB1AF-Y114 
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CACR-SR05BB1ES 
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CACR-SR05BZ1SF 
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CACR-SR05SB1AF F 
CACR-SR05SB1AF-Y187 
CACR-SR05SB1BF
CACR-SR05SB1BF-Y187 
CACR-SR05SZ1SS-Y110 
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CACR-SR05TZ6SFE 
CACR-SR05TZ6SSE 
CACR-SR06TB5BM 
CACR-SR06TZ6SM 
CACR-SR06TZ6SM-E 
CACR-SR06TZ9SM-Y01A 
CACR-SR07AC1CS  
CACR-SR07AC1CS-Y8 
CACR-SR07AC1ER  
CACR-SR07AC1ER-Y105 
CACR-SR07AC1ER-Y35
CACR-SR07AC1ER-Y48 
CACR-SR07AC1ES 
CACR-SR07AC1ES-Y105 
CACR-SR07AY1SR-Y105 
CACR-SR07BB1AM 
CACR-SR07BB1AM-Y15 
CACR-SR07BZ1SM  
CACR-SR09TZ0SF 
CACR-SR09TZ6SF 
CACR-SR09TZ6SF-E 
CACR-SR09TZ6SM-E 
CACR-SR10BB1AF 
CACR-SR10BB1AF-Y114 
CACR-SR10BB1AF-Y8 
CACR-SR10BB1AM  
CACR-SR10BB1AM-Y114 
CACR-SR10BB1BF 
CACR-SR10BB1BF-H 
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CACR-SR10BB1CS 
CACR-SR10BB1CS-Y114  
CACR-SR10BB1CS-Y37 
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CACR-SR10BB1ES-Y17 
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CACR-SR10BC1KS-Y262 
CACR-SR10BE12F-E 
CACR-SR10BE12G-E 
CACR-SR10BE12G-Y72
CACR-SR10BY1SF-C 
CACR-SR10BY1SF-E