描述
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。
Parker PR400SHV Pressure Reducing Valve
NOS! PARKER REMOTE PRESSURE AIR VALVE CWJ12501
NEW Parker Hydraulic Filter 932630Q High Pressure
Parker D39DW11C4N89 75, PRESSURE REGULATION VALVE , NEW
PARKER VERIFLO IR400S4PG PRESSURE REDUCING REGULATOR
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Parker Oil Pressure Regulator Control Valve A4AL; *A7