C#与欧姆龙PLC实现CIP通讯

参考文档：

欧姆龙PLC使用-CSDN博客

CIP通讯介绍（欧姆龙PLC）-CSDN博客

使用NuGet添加引用：CIPCompolet

基础参考我的CIP协议介绍，默认TCP端口为：44818

类NXCompolet

类的功能可以在安装PLC开发软件后帮助文档中查看，对应路径：C:\ProgramData\Omron\CX-Compolet\StartMenu\CX-Compolet\SYSMAC Compolet help

功能及其示例代码点击后查看

# MachineAutomationControllerCompolet继承CIPPlcCompolet，CIPPlcCompolet的
# 变量
public const long TIMEOUT_INFINITE = 4294967295L;
string RoutePath
ConnectionType ConnectionType
bool Active
long ReceiveTimeLimit
string TypeName
int HeartBeatTimer
CIPDevice Device
bool UseRoutePath
string PeerAddress
int LocalPort
bool IsConnected
string[] VariableNames
# 函数
byte[] ExecuteCIPService(byte serviceCode, int classId, int instanceId, int attributeId, byte[] requestData, long requestDataSize)
byte[] ExecuteCIPService(byte serviceCode, int classId, long instanceId, int attributeId, byte[] requestData, long requestDataSize)
byte[] ExecuteCIPService(byte serviceCode, string variableName, byte[] requestData, long requestDataSize)
void Update()
void AboutBox()
VariableInfo GetVariableInfo(string variableName)

# NXCompolet继承MachineAutomationControllerCompolet的
# 变量
string UnitName
short RunStatus
Encoding PlcEncoding
string[] VariableNames                // 可以通过这个公共变量获取到有哪些可读的参数名
string[] SystemVariableNames
DateTime Clock
bool DontFragment
# 函数 
MachineAutomationControllerCompolet(IContainer container)
object ReadVariable(string variableName)
Hashtable ReadVariableMultiple(string[] variableNames)
void WriteVariable(string variableName, object writeData)
byte[] ReadRawData(string variableName)
Hashtable ReadRawDataMultiple(string[] variableNames)
void WriteRawData(string variableName, byte[] writeData)
VariableInfo GetVariableInfo(string variableName)                // 获取变量信息，是否为结构体、数组、对应变量类型
EventLogItemCollection GetEventLogs(EventCategory category)

# NXCompolet自己定义的
RunModeTypes RunMode

// 数据类型
public enum VariableType
{
    TIMER = 1,
    COUNTER = 2,
    CHANNEL = 3,
    UINT_BCD = 4,
    UDINT_BCD = 5,
    ULINT_BCD = 6,
    ENUM = 7,
    DATE_NSEC = 8,
    TIME_NSEC = 9,
    DATE_AND_TIME_NSEC = 10,
    TIME_OF_DAY_NSEC = 11,
    UNION = 12,
    BOOL = 193,
    SINT = 194,
    INT = 195,
    DINT = 196,
    LINT = 197,
    USINT = 198,
    UINT = 199,
    UDINT = 200,
    ULINT = 201,
    REAL = 202,
    LREAL = 203,
    STRING = 208,
    BYTE = 209,
    WORD = 210,
    DWORD = 211,
    LWORD = 212,
    ASTRUCT = 160,
    STRUCT = 162,
    ARRAY = 163
}

ExecuteCIPService函数功能描述

# CIPPlc Compolet Class Library
byte[] requestData = new byte[2];
requestData[0] = 1;
requestData[1] = 0;
data = CIPPlcCompolet1.ExecuteCIPService(0x4C, "Variable1", requestData, 2);

运行环境启动配置

安装欧姆龙PLC开发软件
安装工具：CX-Compolet_SGW_Ver1.72
在Network Browser》Control Panel》Network Configuration》EtherNet/IP Hardware》Communications Adapter》如果使用网管更改ip地址

启动网关。点击Start如果有对应Open状态就可以，负责勾选上下面的Extend the Ethernet ports后再Start

PLC上配置IP地址（连接成功后更改IP地址）

更改后连接的IP地址设置（如果这里不更改一致，无法实现在线测试更改）
1. 上方工具栏》控制器》通信设置》远程IP地址

PLC添加可被外部读取的全局变量

上位机代码实现

依赖项，Nuget中搜索CIPCompolet添加：

using OMRON.Compolet.CIP;

internal class MyCIP
{
    NXCompolet nXCompolet;          // 欧姆龙的CIP通讯
    Mutex mutex = new Mutex();      // 进程间互斥锁

    public MyCIP() {
        Conncet("192.168.50.1");    // 192.168.50.1; 127.0.0.1
    }

    public void Conncet(string ip)
    {
        Task.Run(() =>
        {
            nXCompolet = new NXCompolet(new Container());
            nXCompolet.PeerAddress = ip;
            while (true)
            {
                mutex.WaitOne();
    
                Console.WriteLine("RunStatus: " + nXCompolet.RunStatus + "; PeerAddress:" + nXCompolet.PeerAddress);
                Console.WriteLine("port: " + nXCompolet.LocalPort);
                //Console.WriteLine("UnitName: " + nXCompolet.UnitName + ",DontFragment: " + nXCompolet.DontFragment);
                nXCompolet.Active = true;
                if (!nXCompolet.IsConnected)
                {
                    nXCompolet.Active = false;
                    Console.WriteLine("PLC连接错误");
                    Thread.Sleep(1000);
                    continue;
                }
                Console.WriteLine("PLC连接成功");
    
                //nXCompolet.RunMode = NXCompolet.RunModeTypes.Program;
                object obj = nXCompolet.ReadVariable("gbHMI_CloseDoor");
                Console.WriteLine(obj.ToString());
    
                mutex.ReleaseMutex();
    
                Thread.Sleep(1000);
            }
        });
    }
}

运行结果

RunStatus: 1; PeerAddress:192.168.50.1 port: 2 PLC连接成功 True

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