110A-1293
为了完成控制策略,为了替代继电器,使用户等完成类似继电器线路的控制系统梯形图,而编制了一套控制算法功能块(或子程序),称为指令系统,固化在存贮器ROM中,用户在编制应用程序时可以调用。指令系统大致可以分为两类,即基本指令和扩展指令。细分一般PLC的指令系统有:基本指令、定时器/计数器指令、移位指令、传送指令、比较指令、转换指令、BCD运算指令、二进制运算指令、增量/减量指令、逻辑运算指令、特殊运算指令等,这些指令多是类似汇编语言。另外PLC还提高了充足的计时器、计数器、内部继电器、寄存器及存贮区等内部资源,为编程带来极大方便。
Miki Pulley BXHA-20 Spring-Actuated Brake Motor TEL Lithius
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ICP CONCHANNEL MODULE
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Lam Research0mm Top Baffle
ASCO WP8210D95 SOLENOID VALVE
Therma-WaveSensor Module Rev. D Opti-Probe 2600B
Valcom MPRN-(-10~760mmHg)-1VAO-4-TL Pressure Switch Lot of 5
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HANKISON INTERNATIONAL HL VAPOR REMOVAL FILTER H SERIES
Lam ResearchRing
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POTTER&BRUMFIELD CLBTIME DELAY RELAY
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Tokyo Electron D116700 Rev. B Etch Shield
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Siemens 6SE6420-2UD17-5AA1 Micromaster 420 6SE6400-2FB00-6AD0
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