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连接参数都正常但是连不上PLC
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解决步骤
- 使用tcp时，检查ip、端口号是否是正确的连接参数，PLC和屏应在同一网段。使用串口时，检查串口号是否是屏上指定的串口号如（COM1/COM2/COM3）、检查波特率、校验位等基本连接参数是否正确。
- 检查站号是否正确。
- 如果屏做主站，确保只有屏一个设备作为主站进行连接，不要连接其他做主站的设备，如果作为从站可以忽略这一步。
- 检查是否添加了设备变量，必须添加设备变量，设备才能正常连接。
查看连接状态
添加了设备变量后，会自动生成一个名为设备名.STATUS的变量，可以绑定显示在页面，从而确认状态连接
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