利用C#通过ADS与TwinCAT3.0的PLC通信DEMO5730

利⽤C#通过ADS与TwinCAT3.0的PLC通信DEMO1.创建WindowsFormsC#⼯程在Solution下，选择Addnewproject，选择VisualC#下的ClassicDesktop中的WindowsFormsApplication。.Netframework版本选择4.0。2.添加ADS⽀持在Project窗⼝中选择References，右键点击AddReference，Browse中选择TwinCATsdk所在⽬录：C:\TwinCAT\AdsApi.NET\v4.0.30319，并添加TwinCAT.Ads.dll库。添加TwinCAT.Ads.dll3.建⽴ADS链接创建TcAdsClient实例，链接851端⼝。boolbLampStat=false;inthvarLamp;AdsStreamdataStream;TcAdsClienttcClient;privatevoidForm1_Load(objectsender,EventArgse){tcClient=newTcAdsClient();try{tcClient.Connect(851);}catch(Exceptionex){MessageBox.Show(ex.Message);}if(!tcClient.IsConnected){this.Close();}}3.通过ADS读取Lamp状态通过CreateVariableHandle函数，指定PLC中的变量，调⽤ReadAny函数读取相关的数值。privatevoidupdateLampBtn(){inthvar=tcClient.CreateVariableHandle("MAIN.lamp");bLampStat=(bool)(tcClient.ReadAny(hvar,typeof(bool)));buttonToggleLamp.Text=bLampStat?"LampON":"LampOff";tcClient.DeleteVariableHandle(hvar);}4.通过ADS写⼊RocketSwitch状态通过CreateVariableHandle函数，指定PLC中的变量，调⽤WriteAny函数写⼊相关的数值。privatevoidbuttonToggleLamp_Click(objectsender,EventArgse){inthvar=tcClient.CreateVariableHandle("MAIN.Switch");tcClient.WriteAny(hvar,!bLampStat);tcClient.DeleteVariableHandle(hvar);}5.注册通知Lamp状态的改变注册Event函数tcClient_OnNotification()，⽤于监听lamp变量的变化。dataStream=newAdsStream(1*2);hvarLamp=tcClient.AddDeviceNotification("MAIN.lamp",dataStream,0,2,AdsTransMode.OnChange,100,0,null);tcClient.AdsNotification+=newAdsNotificationEventHandler(tcClient_OnNotification);实现Event相应函数，注意避免跨线程操作UI。publicvoidtcClient_OnNotification(objectsender,AdsNotificationEventArgse){try{e.DataStream.Position=e.Offset;if(e.NotificationHandle==hvarLamp){bLampStat=e.DataStream.ReadByte()>0?true:false;SetText(bLampStat?"LampON":"LampOff");}}catch(Exceptionex){MessageBox.Show(ex.Message);}}publicdelegatevoidStringArgReturningVoidDelegate(stringstr);privatevoidSetText(stringstr){if(this.buttonToggleLamp.InvokeRequired){StringArgReturningVoidDelegated=newStringArgReturningVoidDelegate(SetText);this.Invoke(d,newobject[]{str});}else{this.buttonToggleLamp.Text=str;}}⾄此，实现了通过WindowsFormsApplication的Button控制PLC中的lamp控件，并经过Notification