C# 读写ABPLC( Allen Bradley)

最新推荐文章于 2024-07-31 15:09:21 发布

easyboot

最新推荐文章于 2024-07-31 15:09:21 发布

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本文链接：https://blog.youkuaiyun.com/easyboot/article/details/131300295

该文介绍了如何利用libplctag.net库与PLC进行通信，包括设置PLC的IP地址、Tag路径，以及读写Tag的值。示例代码展示了如何写入和读取ControlLogixPLC中HMI_F26[0]标签的浮点数值，使用了ab_eip协议并设定了超时时间为5秒。

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1.安装 libplctag.net库

GitHub - libplctag/libplctag.NET: This is a .NET wrapper for libplctag.

2.PLC IP和tag

3.写入值

            var myTag = new TagReal()
            {
                //Name is the full path to tag. 
                Name = "HMI_F26[0]",
                //Gateway is the IP Address of the PLC or communication module.
                Gateway = "192.168.1.11",
                //Path is the location in the control plane of the CPU. Almost always "1,0".
                Path = "1,0",
                PlcType = PlcType.ControlLogix,
                Protocol = Protocol.ab_eip,
                Timeout = TimeSpan.FromSeconds(5)
            };

            // write the value to PLC
            myTag.Write(float.Parse( tbWritePlC.Text));

4.读取值

           var myTag = new TagReal()
            {
                //Name is the full path to tag. 
                Name = "HMI_F26[0]",
                //Gateway is the IP Address of the PLC or communication module.
                Gateway = "192.168.1.11",
                //Path is the location in the control plane of the CPU. Almost always "1,0".
                Path = "1,0",
                PlcType = PlcType.ControlLogix,
                Protocol = Protocol.ab_eip,
                Timeout = TimeSpan.FromSeconds(5)
            };

            // Read the value from the PLC
            float output = myTag.Read();
            tbReadPlC.Text = output.ToString();

5.知道Tag类型和Tagname就可以顺利的读写值了