描述
三个定时器产生一组顺序脉冲的梯形图程序，顺序脉冲波形如图5-8b所示。当X4接通，T40开始延时，同时Y31通电，定时l0s时间到，T40常闭触点断开，Y31断电。T40常开触点闭合，T41开始延时，同时Y32通电，当T41定时15s时间到，Y32断电。T41常开触点闭合，T42开始延时．同时Y33通电，T42定时20s时间到，Y33断电。如果X4仍接通，重新开始产生顺序脉冲，直至X4断开。当X4断开时，所有的定时器全部断电，定时器触点复位，输出Y31、Y32及Y33全部断电。
ALLEN BRADLEY SLC-100 1745-LP101 (4 AVAILABLE)
ALLEN BRADLEY 1745-C1 NSPP 1745C1
ALLEN BRADLEY 1745-LP101 PROGRAMABLE CONTROLLER
Allen Bradley 1745-PCC Interface Converter
ALLEN BRADLEY SLC100 PROCESSOR UNIT 1745-LP101 SER.D
Allen Bradley 1745-E156 SLC 150 Expansion Unit
Allen Bradley Memory Module 1745-M1 #21216
ALLEN BRADLEY # 1745-LP101 SLC 100 PROCESSOR UNIT
Allen Bradley SLC100 1745-LP101 Ser C Frn 5 Processor
1745-E153/A Allen Bradley SLC 150 1745E153 N828
One-day shipping available
1745-E151/A Allen Bradley SLC 150 1745E151 N833
One-day shipping available
Allen Bradley 1745-E101 Expansion Unit
Allen Bradley 1745-M1/1745M1 Ser B Memory
