1746-R15、1746-R15
- 供应商
- 厦门卡库电气有限公司
- 认证
- 报价
- ¥99.00元每个
- 品牌
- AB
- 型号
- 1746-R15
- 联系电话
- 0592-5709823
- 手机号
- 18030229052
- 销售
- 严小姐
- 所在地
- 厦门市湖里区安岭路966-968号汇金湖里大厦815号之一
- 更新时间
- 2015-11-18 10:06
1746-r15产品介绍:
1746-r15厦门卡库电气有限公司
联系人:严小姐
手机:
电话:0592-5709823
传真:0592-5709828
q 在plc控制系统设计中,常常碰到负载的起动与停止控制,通常的做法是采用两只按钮作为外部起动与停止控制的输入器件,在plc中与两只按钮相对应的输入点数也有两个,plc的外部接线如图1所示,按钮sb1(x0)作为起动控制,按钮sb2(x1)作为停止控制,这样虽然可以达到控制目的,但需要的按钮和连接导线较多,plc的输入点数也较多。但在实际工作中,可以充分利用plc内部多功能化的特点,采用单个按钮控制负载的起动与停止,进行改进后的plc外部接线如图2所示,用sb替代sb1和sb2的功能,用x0替代x0和x1的功能,电路的实际接线就大大简化,这样做不仅节省了硬件成本,而且还大大减少了由于按钮多而可能引起的故障.使电路更加经济合理、安全可靠,控制方便简单,具有很高的实用价值。笔者根据实际的工作经验和研究成果,以松下电工fp0系列plc为例介绍几种单按钮起停控制的plc编程技术。[align=center] 图1 图2[/align] 1 采用上升沿微分指令的编程技术 [align=center]图3 采用上升沿微分指令编程的梯形图程序 图4采用置位/复位指令编程的梯形图程序[/align]采用上升沿微分指令编程的梯形图程序,如图3所示,控制过程如下:当第一次按下sb时,x0接通,使r0的线圈接通一个扫描周期,其常开触点闭合,y0的线圈接通并自锁,启动外部负载工作运行;同时,y0的对常开触点闭合,为r1的线圈接通做准备;当第2次按下按钮sb时,x0接通,r0再次接通一个扫描周期,r1的线圈被接通,r1的常闭触点分断,y0的线圈断开,外部负载停止工作。反复按下sb,将会重复上述控制过程。采用置位/复位指令的编程技术 采用置位/复位指令编程的梯形图程序,如图4所示,控制过程如下:当按下sb时,x0接通,r0的线圈接通一个扫描周期,其常开触点闭合,r2置位(闭合)且保持,r2的一对常开触点闭合,y0的线圈接通,启动外部负载工作运行;同时,r2的另一对常开接点闭合,为r1的线圈接通做准备;当再次按下sb时,x0接通,使r0的线圈再次接通一个扫描周期,r1的线圈接通,r1的常开接点闭合,r2复位(断开)且保持,y0的线圈断开,外部负载停止工作运行。之后依次按下sb的工作情形与上述相同。
measurex termination rs-232 05400400 plc processor honeywell054004 00 w/ab
measurex transition 05416300 plc processor honeywell controlprocessor 054163 00
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measurex 05413500 transition flat panel plc processor honeywell054135 00 type 2
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betalog hathaway 512 309060-112
foxboro i/a series p0700hv-s
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indramat ac servo capacitor-tcm tcm 1.1-08-w0 219460 k39/93pl
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ge multilin 269 269-100p-120
cognex 560-110884.41 icn image processor board card plc modulesisd 460-110884.2
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foxboro i/a series p0961bd-0c
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siemens sitor vs ac drive 6qg 3212-2aa00 6 90 a
allen bradley 1336-bdb-sp30c
allen bradley 1336-bdb-sp44c
abb bailey nctm01
abb bailey infi 90 net 90 iefan01
bailey nmpp02
abb bailey infi 90 symphony imfec12
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abb bailey namm03 analog master net 90
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abb advant 3bht3000025r1 di650 digital input module
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riva runabout 2 stroke in water stand with wheel kit
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badger research valve 1/2'' sst 305 150 flange # 236-z 421
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kepco rack mounted power module supply hsf 24-6
bailey imdsi02 infi 90 digital input slave i/o module
kepco rack chassis model ra 19 - 6 b
abb bailey infi 90 net 90 imfbs01 field bus slave module
abb bailey infi 90 imas001 control analog output slavemodule
abb bailey harmony p-ha-repfo10000 repeater communicationsmodule
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