s7netplus二次应用

1. 安装

• 这是个基于S7协议的开源协议
  
  

2. 引用

using S7.Net;

3. 创建PLC对象

    internal class s7net_lib{//idenfy basic link paramsprivate string plc_ip;private CpuType plc_type;private short plc_rack, plc_slot;public Plc my_plc;//constructor，含参构造函数 public s7net_lib(int type, string ip, short rack, short slot){switch (type){case 0:plc_type = CpuType.S7200;break;case 1:plc_type = CpuType.S7300;break;case 2:plc_type = CpuType.S7400;break;case 3:plc_type = CpuType.S71200;break;case 4:plc_type = CpuType.S71500;break;default:break;}plc_ip = ip;plc_rack = rack;plc_slot = slot;my_plc = new Plc(plc_type, plc_ip, plc_rack, plc_slot);}}

4. 连接

        //connectpublic bool connect_plc(){try{my_plc.Open();}catch{MessageBox.Show("plc can't be connected,check params!");}if (my_plc.IsConnected){return true;}else{return false;}}

5. 断开连接

        //disconnectedpublic bool disconnect_plc(){my_plc.Close();if (my_plc.IsConnected){return false;}else{return true;}}

6. PLC数据类型和寻址类型

      //Analysis S7 data typeprivate VarType S7_datatype(string type){switch (type){case "bool": return VarType.Bit;case "byte": return VarType.Byte;case "word": return VarType.Word;case "dword": return VarType.DWord;case "int": return VarType.Int;case "dint": return VarType.DInt;case "real": return VarType.Real;case "lreal": return VarType.LReal;case "string": return VarType.String;case "s7string": return VarType.S7String;case "s7wstring": return VarType.S7WString;case "datetime": return VarType.DateTime;case "timer": return VarType.Timer;case "datetimelong": return VarType.DateTimeLong;default:return VarType.Byte;}}//Analysis S7 register typeprivate DataType S7_registertype(int db_area){switch (db_area){case 129: return DataType.Input;case 130: return DataType.Output;case 131: return DataType.Memory;case 132: return DataType.DataBlock;case 29: return DataType.Timer;case 28: return DataType.Counter;default:return DataType.DataBlock;}}

7. 读写数据

        //data write and readpublic object? write_read_value(string type, int db_area, int iDB_num, int iDB_start_byteadd, string w_or_r, object values, int bit_address = 0, int count = 1){if (w_or_r == "w")if (type == "bool"){my_plc.WriteBit(S7_registertype(db_area), iDB_num, iDB_start_byteadd, bit_address, (bool)values);}else{my_plc.Write(S7_registertype(db_area), iDB_num, iDB_start_byteadd, values);}return my_plc.Read(S7_registertype(db_area), iDB_num, iDB_start_byteadd, S7_datatype(type), count);}

8. Int数据读写

        //int data write and readpublic short int_rw_value(int db_area, int iDB_num, int iDB_start_byteadd, string w_or_r, short values = 0){short feedbackword = (short)write_read_value("int", db_area, iDB_num, iDB_start_byteadd, w_or_r, values);return feedbackword;}

9. byte数据读写

        //byte data write and readpublic byte byte_rw_value(int db_area, int iDB_num, int iDB_start_byteadd, string w_or_r, byte values = 0){return (byte)write_read_value("byte", db_area, iDB_num, iDB_start_byteadd, w_or_r, values);}

10. 字符串读写

        //string data public string string_rw_value(int db_area, int iDB_num, int iDB_start_byteadd, string w_or_r, string values = ""){byte maxcount= new byte();string string_value;if (w_or_r == "r") { maxcount = byte_rw_value(db_area, iDB_num, iDB_start_byteadd + 1, "r"); }else if (w_or_r == "w") { maxcount = (byte)values.Length; byte_rw_value(db_area, iDB_num, iDB_start_byteadd + 1, "w", maxcount); }string_value = (string)write_read_value("string", db_area, iDB_num, iDB_start_byteadd + 2, w_or_r, values, 0,maxcount);return string_value;}

11. 字符读写

        //char datapublic char char_rw_value(int db_area, int iDB_num, int iDB_start_byteadd, string w_or_r, char values = ' '){ char char_value = new char();if (w_or_r == "r")char_value = (char)byte_rw_value(db_area, iDB_num, iDB_start_byteadd, "r");else if(w_or_r == "w")char_value = (char)byte_rw_value(db_area, iDB_num, iDB_start_byteadd, "w",(byte)values);return char_value;}