S7-200产生A/B相正交脉冲

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  我有个PLC200的程序 密码已经丢失  程序无法上载  各位高手  应该怎么办 问题补充：密码等级是如何查看…

  SIMATIC S7-200 2020年10月31日

• 西门子200的恒速升温

  
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  给一个温控箱内加热，根据温度大小调整功率大小输出。设定一个恒速升温值，10℃/min升温。这样程序什么写呢？ 问题补充：没有使用PID控制，大概1秒采集一组数据，最新10组作一个平…

  SIMATIC S7-200
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  2021年7月5日

• 如何保存某时刻变量值

  
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  Warning: mysqli_query(): (HY000/1194): Table 'wp_options' is marked as crashed and should be repaired in D:\wwwroot\www.zhaoplc.com\wp-includes\class-wpdb.php on line 2357
  
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  Warning: mysqli_query(): (HY000/1194): Table 'wp_options' is marked as crashed and should be repaired in D:\wwwroot\www.zhaoplc.com\wp-includes\class-wpdb.php on line 2357
  
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  Warning: mysqli_query(): (HY000/1194): Table 'wp_options' is marked as crashed and should be repaired in D:\wwwroot\www.zhaoplc.com\wp-includes\class-wpdb.php on line 2357
  
  Warning: mysqli_query(): (HY000/1194): Table 'wp_options' is marked as crashed and should be repaired in D:\wwwroot\www.zhaoplc.com\wp-includes\class-wpdb.php on line 2357
  
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  我想知道如何保存某时刻点变量值,以便和后边值进行比较.输出差值.该程序应如何编写,我的邮箱ZZYZQ0317@163.COM 最佳答案 可以使用定时中断，在中断程序里先比较，再用当…

  SIMATIC S7-200
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• s7-200 计数器问题 频率小于10HZ 能用计数器计数吗

  
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  各位老师，我这一有个来回往复运动的设备，运动频率小于10HZ，能用200的计数器计数吗？ 不用高数计数器可以吗？ 最佳答案 如果运动频率小于10Hz当然可以用200的计数…

  SIMATIC S7-200
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  2020年10月31日

• PLC控制MAX7219的LCK,DIN,LOAD三个端

  
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