Analyzing the difference between DCS and PLC,the most important points are two points,one is that DCS is distributed control and has a global database;the other is that PLC is a sequential scanning mechanism,and DCS is time-based control.Our system conforms to the first point,such as the modification of an I/O tag,which can also be simultaneously reflected in the HMI.
分析DCS与PLC的区别,最关键的是两点,一是DCS是分布式控制,拥有全局数据库;二是PLC是顺序扫描机制,DCS是以时间为基准的控制。我们的系统符合第一点,例如一个I/O标签的修改,在HMI也可以同步体现。
SYLVANIA 7305 TYPE PM A/C RELAY CAT 5U4-76 IN BOX
BELDEN 9L28026 H-100 FLAT CABLE 28 AWG IN BOX
GE PUSH BUTTONS (13Pcs) 1 LOT IN BOXES SEE DESC
SIEMENS 3TF40 22-0AG1 MOTOR CONTACTOR IN BOX
ALLEN BRADLEY 160-BA03NPS1 SERIES C FRN.7.06 EXCELLENT
ELMO PS-15/75H POWER MODULE WITH HEAT SINK
Enlarge
CUTLER HAMMER 9575H2532-98 MAGNETIC RELAY IN BOX