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编程语言为复杂,多种多样,看似相同,但不通用。常用的可以划分为以下5类编程语言:
这是PLC厂家采用多的编程语言,初是由继电器控制图演变过来的,比较简单,对离散控制和互锁逻辑为有用;
(2)顺序功能图
它提供了总的结构,并与状态定位处理或机器控制应用相互协调;
(3)功能块图
它提供了一个有效的开发环境,并且特别适用于过程控制应用;
(4)结构化文本
Square D FAL3605016M Circuit Breakers 50 Amp ranteed
Square D LAL36300 Circuit Breakers, 300 Amp, NEW!
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Square D FA26025AB Circuit Breakers, 25 Amp, NEW!
Square D KC34200 Circuit Breakers, 200 Amp, 65 kAIR
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Square D Circuit Breaker, 175 Amp I-Line NEW!
Square D I-Line Circuit Breaker KH36200 200 amp
Square D I Line Circuit Breaker KA36125 125 amp
Square D I-Line Circuit Breaker KH36200 200 amp
Square D 70A Load Center HOM2-4L70S 120/240 New In Box
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Square D Trilliant 2 Pole 200A 200 Amp SDTL200 MAIN
Square D QO320 breaker 20 amp 240 volt QO breaker
#627 Square D 20 AMP 120 Volt 1 Pole GFI Breaker QO Typ
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Square D 25 amp circuit breaker EDB14025 NEW IN BOX NIB