描述
PLC与DCS无法比较,PLC是控制器,是孤立的产品,而DCS是系统。但PLC可以与DCS的控制站比较,PLC的循环周期在10毫秒左右,而DCS控制站在500毫秒左右,PLC的开放性更好,作为产品其独立工作的能力更强。
NEW SIEMENS 6FX1151-1BD01 MODULE 6FX11511BD01
XYCOM XVME-957 MODULE XVME957
NEW MITUTOYO AT332-800 LINEAR SCALE AT332800 AT332
REPAIRED ABB 3HAB8101-8/08D CONTROLLER DSQC346G
ALLEN BRADLEY 2711-T5A16L1 PANELVIEW 550
NIB ALLEN BRADLEY 520F-BOD-C1F-C1F MULTI SPEED STARTER
NEW TOTAL CONTROL QPJ2D101S2P QUICKPANEL JR