描述
PLC在早期只是用来存储执行逻辑运算、顺序控制、定时、计数和运算等操作的指令;并通过数字输入和输出操作,来控制各类机械或生产过程。这种特性导致他一般用于较小的自控场所,且拓展性并不强。
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Lot of 50 NEW Batteries For Symbol Motorola MC70, MC75
Lot of 50 NEW Batteries For Symbol Motorola 82-71364-03
Lot 50 New Batteries For Symbol Motorola BTRY-MC7XEAB00
SYMBOL MOTOROLA DS9808-LL20007C1WR SCNR:DS9808-LL WITH
Symbol Motorola MC9090-GF0HJEFA6WW w/ Cradle
Gun, Laser, Color, 53key, Win Mobile, Audio
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SYMBOL MOTOROLA DS9808-LR20007C2WR SCNR:DS9808-LR W RFI
SYMBOL MOTOROLA DS9808-SR00007C1WR SCNR:DS9808-SR WITH