描述
三、实验内容
1、控制要求
(1)初始状态
电动机M1和M2为OFF,电磁阀3YA和4YA为OFF,夹具处于松开状态,lYA和2YA为OFF,飞锯处于抬起状态,液压阀SYA为OFF,小车处于原始位置。
(2)启动操作
按下启动按钮,开始下列操作:
①电动机M2运转后M1运转,即飞锯旋转后再送入钢管。
②当钢管长度达到预定要求时(例如6m),电磁阀4YA为ON,夹具夹紧钢管,带动小车和飞锯一起向前运行。
③当小车运行到SQ1位置时,SQ1为ON,电磁阀lYA为OFF,下锯切割钢管,完成钢管切割时,SQS为ONo
④当小车到达SQ2位置时,SQ2为ON,同时lYA为OFF,2YA为ON飞锯抬起,随后2YA为OFFo
⑤当到达SQ3的位置时,SQ3为ON,同时电磁阀4YA为OFF,3YA为ON夹具松开。同时液压阀SYA为ON使小车返回到原来位置,随后3YA,SYA又恢复为OFF。
⑥如果小车没有返回继续向前运行,当到达SQ4位置时,SQ4为ON,表示系统出现故障发报出报警信号,同时整个系统停止在当前状态下。
⑦如果不是按着上述控制要求运行,都要发出报警信号停止运行。例如3YA,4YA同时为ON,4YA,SYA同时为ON,S04为ON等。
(3)停止操作
按下停止键后,所有的输出均匀为OFF,停止操作。
欧美品牌停产的,常用的“PLC”备品备件
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