1. 基于C#的数据交互
A. S7，using S7.Net,后文读写数据时二次封装过S7协议，这里暂且不表，只列举S7协议最原始的应用。
- new一个PLC对象
//idenfy basic link paramsprivate string plc_ip;private CpuType plc_type;private short plc_rack, plc_slot;public Plc my_plc;my_plc = new Plc(plc_type, plc_ip, plc_rack, plc_slot);
- 连接和断开PLC
//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;}}//disconnectedpublic bool disconnect_plc(){my_plc.Close();if (my_plc.IsConnected){return false;}else{return true;}}
- 读写数据，S7_registertype是PLC的寄存器地址类型，如DB,M,I,Q,T,C等。S7_datatype是自己提前封装好的bool,byte,word,int等等这一类基础数据类型
//写bool，bool由byte数组的位寻址而来，bit_address就是数组下标
my_plc.WriteBit(S7_registertype, iDB_num, iDB_start_byteadd, bit_address, (bool)values);
//写非bool
my_plc.Write(S7_registertype, iDB_num, iDB_start_byteadd, values);
//读，count是计数单位，一般写1，以一个byte作为最小计算单位
my_plc.Read(S7_registertype, iDB_num, iDB_start_byteadd, S7_datatyp, count);
B. 用静态变量存储PLC的交互数据
-
UI和PLC变量如下：
-
新建static
internal static class data_yamltest_exchange{public static byte byte_var;public static short word_var;public static bool bool_var;}
- 数据交互，这里的数据二次封装过的，但是是基于上面S7协议封装的，这里不深究
//task1Task.Run(() =>{while (true){if (my_plc_status){//read from plcdata_yamltest_exchange.bool_var = my_s7.bool_rw_value(132, my_plc_iDB, 4, "r", 0); ;//write to plc my_s7.write_read_value("word", 132, my_plc_iDB, 2, "w", data_yamltest_exchange.word_var, 0, 1);my_s7.write_read_value("byte", 132, my_plc_iDB, 0, "w", data_yamltest_exchange.byte_var, 0, 1);}}});
- UI后端代码，这里用了两个委托来完成radioButton的显示
public partial class _6Yaml_test : UserControl{public _6Yaml_test(){InitializeComponent();this.textBox1.Text = "0";this.textBox2.Text = "0";}string val = null;bool status = false;private void _6Yaml_test_Load(object sender, EventArgs e){Task.Run(() =>{setTextCallBack sV = new setTextCallBack(setValue);setRadioCallBack rV = new setRadioCallBack(setStatus);while (true){if (data_yamltest_exchange.bool_var == true){status = true;val = "bool have been enabled";radioButton1.Invoke(sV, val);radioButton1.Invoke(rV, status);}else{status = false;val = "bool have been disabled";radioButton1.Invoke(sV, val);radioButton1.Invoke(rV, status);}try{data_yamltest_exchange.word_var = Convert.ToInt16(textBox2.Text.ToString());data_yamltest_exchange.byte_var = Convert.ToByte(textBox1.Text.ToString());}catch { break; };}});}//cross-thread delivery//1.delegate typepublic delegate void setTextCallBack(string val);public delegate void setRadioCallBack(bool status);//2.delegate functionpublic void setValue(string val){radioButton1.Text=val;}public void setStatus(bool status){ radioButton1.Checked = status;}}
- 这个方法里，PLC读出的数据存储在自建的静态类里，要写入PLC变量的值也由自建的静态类给出，C#各个线程都可以访问该静态类，避免了各个线程和类之间传值的复杂和繁琐。
C. 用yaml交互
- 安装
YamlDoNet库
- 引用命名空间
using YamlDotNet.Serialization;
-
新建文件夹，新建
.yaml文件，建立yaml结构
-
读取yaml文件方法
//yaml_readpublic T Yaml_read<T>(string file_path){ var deserializer = new DeserializerBuilder().Build();T my_yamlObject;using (var reader = new StreamReader(file_path)){ my_yamlObject=deserializer.Deserialize<T>(reader);}return my_yamlObject;}
- 写入yaml文件方法
//yaml_writepublic void Yaml_write(object obj, string file_path){ var serializer = new SerializerBuilder().WithNamingConvention(CamelCaseNamingConvention.Instance).Build();var my_yaml = serializer.Serialize(obj);File.WriteAllText(file_path, my_yaml);}
- 建立和yaml结构一致的class结构，这是重点
- 用
[YamlMember(Alias)=""]来指定yaml文件中的结构名] [YamlIgnore]用于在序列化或者反序列化的时候忽略掉它[YamlMember(Order = 1)]用于指定序列化的顺序{get;set;}用于设置yaml结构的属性，公有属性。yaml文件的结构本身就相当于被保护起来的一个私有字段。- yaml文件中不要用table键缩进，会报错，缩进一般使用空格，敲两个或者四个空格
- yaml内容的结构名，和实际程序里面必须一一对应，一字不差
- 用
- 建立yaml文件需要的程序结构样例
//yaml结构public class yaml_data{public class yaml_test_data1{[YamlMember(Alias = "Byte_var")]public byte Byte_var { get; set; }[YamlMember(Alias = "Word_var")]public short Word_var { get; set; }[YamlMember(Alias = "Bool_var")]public bool Bool_var { get; set; }}public class yaml_test_data2{[YamlMember(Alias = "Int_var")]public int Int_var { get; set; }[YamlMember(Alias = "Char_var")]public char Char_var { get; set; }}// Class IIpublic class yamal_class_collection{[YamlMember(Alias = "test_data1")]public yaml_test_data1 test_data1 { get; set; }[YamlMember(Alias = "test_data2")]public yaml_test_data2 test_data2 { get; set; }}//Class I[YamlMember(Alias="data_collection")]public yamal_class_collection data_collection { get; set; }}
- 建立yaml文件内容，注意上下对应
data_collection: #Class I 一级class名称，和程序对应test_data1: #Class II 二级class名称，和程序对应Byte_var: 0x10 #各个字段Word_var: 32Bool_var: falsetest_data2: #Class II 二级class名称，和程序对应Int_var: 99Char_var: 'a'
-
示意如图：
-
引用yaml，在load事件中读取yaml文件默认配置
yaml_data my_yaml_data = new yaml_data();
Config_yaml my_yaml= new Config_yaml();
my_yaml_data = my_yaml.Yaml_read<yaml_data>("C:\\Users\\testyaml.yaml");
