57120001-AH ABB

336A5007AL060 CABLE ASM 44 CONDUCT
336A5101PAC115 RELAY 1A 115VAC 4PDT
336A5101PAC115=SK14W RELAY 1A 115VAC 4PDT SEAL/LT
336A5102P1 RESISTOR 66 OHM
336A5102P2 RESISTOR 25 OHM
336A5102P3 RESISTOR 14 OHM
336A5115G1 POWER SUPPLY
336A5116P250 25 OZ ANTIFRETTING
336A5116P30 30CC ANTIFRETTING LU
336A5199AHP1 PMC610 ETHERNET CTLR 10/100TX

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描述

继电器控制线路中各继电器同时都处于受控状态,属于并行工作方式。而PLC的控制逻辑中,各内部器件都处于周期性循环扫描过程中,各种逻辑、数值输出的结果都是按照在程序中的前后顺序计算得出的,所以属于串行工作方式。

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