Description
设置延时时间,经过延时检测开到位或关到位信号,如果这些信号不能按时准确返回给PLC,说明阀可能有故障,做阀故障报警处理。程序设计如图5所示。X2为阀门开启条件,Y1为控制阀动作输出,定时器定时时间大于阀开启到位时间,X3为阀到位返回信号,R1为阀故障位。
ASML 12NC 4022.474.0856.4 IH Carrier 1400I Wafer Spare
Polytec OFV-071 and OFV-072 for MSV-050/100 Microscope
BLUECOAT SG8000-3 PROXY SERVER WEB ACCELERATOR NEW
BLUECOAT SG8000-2 PROXY SERVER WEB ACCELERATOR NEW