故障安全型CPU模块的更换问题

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• S7-300之间的通信

  一改造项目，需要在CPU314C-2DP与CPU315-2DP之间交换数据，请问要如何组态及编程，才能实现此目的？CPU314C-2DP的X2已有接线 最佳答案 S7-300之间的…

  SIMATIC S7-300(F)/S7-400(F/H/FH) 2021年7月4日
• SIMATIC S7-300(F)/S7-400(F/H/FH)

  西门子300软件里没有315-2EH14为什么？

  
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  大家看照片，我已经选择在线安装硬件升级了，怎么没看到目录里有变化呢，还是没有315-2EH14的型号，这是为什么呢？具体怎么才能把这个型号调出来 图片说明：  &nbsp…

  
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  2018年12月1日

• STOP指令

  
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  S7-200PLC有这个STOP指令，不知道S7-300有不有这个指令，或者通过别的程序实现，谢谢 最佳答案 S7300/400通过SFC46,SFB20来实现STOP.：1、SF…

  SIMATIC S7-300(F)/S7-400(F/H/FH) 2018年12月2日

• S7-300编程，always on

  刚刚学习PLC ，我知道引用Always on这个触点，它在程序里一直是1，但是我看了被人的程序，为什么在程序里他们会写一段always on&nbs…

  SIMATIC S7-300(F)/S7-400(F/H/FH) 2020年10月31日

• 风扇旋转方向检测

  在风扇上，呈一定夹角装有2个传感器，检测2片风叶的漏光。PLC怎么简便的编写，可以判断风扇启动后的旋转方向。谢谢 最佳答案 你装两个传感器和一个压力变送器比较哪个更贵？你直接用微压…

  SIMATIC S7-300(F)/S7-400(F/H/FH) 2018年12月1日

• 求个s300仿真器的下载地址

  能在win764位下安装使用中文 最佳答案 可以链接: https://pan.baidu.com/s/16wADXjCzEYKUjIG22dCsKA 密码:&…

  SIMATIC S7-300(F)/S7-400(F/H/FH) 2021年7月4日
• SIMATIC S7-300(F)/S7-400(F/H/FH)

  FB背景数据块的理解

  FB背景数据块有二个东西我看不明白，@actual value跟actual value哪一个是真正的实际值？正常情况下@actual value跟a…

  2021年7月4日

• s7300的 SM 322 DO 32 模块L+ 负载电流的问题

  两个sm322 DO 32 模块的L+ ，都是从一个电流分配器的一个通道引出来 的这个电流分配器的参数简介地址是http://on…

  SIMATIC S7-300(F)/S7-400(F/H/FH) 2018年12月1日

• 关于STEP7中使用SFC14/SFC15的疑问

  我有个问题想向各位老师请教：读取DP上所连接的变频器数据时，经常要调用SFC14/SFC15是不是为了解决通讯的数据一致性问题？否则，我直接用MOVE指令读取如PIW2（状态字）和…

  SIMATIC S7-300(F)/S7-400(F/H/FH) 2017年6月27日
• SIMATIC S7-300(F)/S7-400(F/H/FH)

  扩展脉冲定时器使用方法

  扩展脉冲定时器TV端是不是就是定时器的工作时间？当BI、BCD端什么都没接时，定时器是怎样工作的？ 最佳答案 详细内容参见附图介绍。 图片说明：    提问者对…

  2018年12月1日