发表于：2007/12/1 11:56:00
#0楼
用S-400 PLC,编程实现以下功能:
ITEM#1 ITEM#2 ITEM#3 ITEM#4
device#1 on on
device#2 on on
device#3 on on on
device#4 on on on
device#5 on on
0s 20s 40s 60s 80s
device#1--device#5按上表顺序起停,按下启动按扭20后#1,4#,#5启动,
再过20S后#2,#3,#5启动,依次类推,最后过20S后从ITEM#4返回ITEM#1,
如此往复循环,直至按下停止按扭.
启动:I0.0 停止:I0.1
device#1--device#5:Q0.0;Q0.1;Q0.2;Q0.3;Q0.4;
请教大家如何用最简单的梯形图实现以上功能.
ITEM#1 ITEM#2 ITEM#3 ITEM#4
device#1 on on
device#2 on on
device#3 on on on
device#4 on on on
device#5 on on
0s 20s 40s 60s 80s
device#1--device#5按上表顺序起停,按下启动按扭20后#1,4#,#5启动,
再过20S后#2,#3,#5启动,依次类推,最后过20S后从ITEM#4返回ITEM#1,
如此往复循环,直至按下停止按扭.
启动:I0.0 停止:I0.1
device#1--device#5:Q0.0;Q0.1;Q0.2;Q0.3;Q0.4;
请教大家如何用最简单的梯形图实现以上功能.