IC754VSF12CTD GE

ABB 216NG63A
Motorola MVME 374-1
ABB 07AC91
ABB PM803F
GE IC698CMX016-ED
ICS TRIPLEX T8431
ABB KUC711AE
ICS TRIPLEX T8403
A-B 22C-D260A103
GE IS220PPROS1B
BENTLY NEVADA 3500/22-01-01-00
BENTLY NEVADA 3500/22-01-01-00
EMERSON GXT3-3000RT230 3000VA
GE IS200EPSMG1A

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Description

如果用PLC来控制某一对象时,编制程序时可定义一个定时器来对这一对象的运行状态进行监视:该定时器的设定时间即为这一对象工作所需的最大时间;当启动该对象运行时,同时也启动该定时器。若该对象的运行程序在规定的时间结束工作,发出一个工作完成信号,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

Cogent Cirrus Logic EP7312 Development System with CD

National Instruments PCI-MIO-16XE-10 I/O BoardCogent Cirrus Logic EP7312 Development System with CD

National Instruments PCI-MIO-16XE-10 I/O Board

JK Audio Remote Interface Unit

Marconi Fore Systems HE622 ATM Controller Adapter Card