Description
使该定时器清零，说明这一对象的运行程序正常；否则，属运行不正常，发出报警信号或停机信号。监控程序的梯形图如图7所示。图7中定时器T1为检测元件，X001为控制对象动作信号，X002为动作完成信号，M2为报警或停机信号。假设被控对象的运行程序完成一次循环需要50s
Melles Griot 05-STP-901 HeNe Laser System Power Supply
HP Agilent E1849A VME Card
Dell PE 1950 Dual QC Xeon 1.6 GHz 4 GB RAM Perc 5i SAS
Iwaki Automatic Pulsation Dampener PDA-10H1
Cylink SecureFX Fax Security
