iotgateway/Plugins/Drivers/DriverSiemensS7/SiemensS7.cs

using PluginInterface;
using S7.Net;
using System;
using System.Text;
using Microsoft.Extensions.Logging;

namespace DriverSiemensS7
{
    [DriverSupported("1500")]
    [DriverSupported("1200")]
    [DriverSupported("400")]
    [DriverSupported("300")]
    [DriverSupported("200")]
    [DriverSupported("200Smart")]
    [DriverInfoAttribute("SiemensS7", "V1.0.0", "Copyright IoTGateway© 2021-12-19")]
    public class SiemensS7 : IDriver
    {
        private Plc plc = null;

        public ILogger _logger { get; set; }
        private readonly string _device;
        #region 配置参数

        [ConfigParameter("设备Id")]
        public Guid DeviceId { get; set; }

        [ConfigParameter("PLC类型")]
        public CpuType CpuType { get; set; } = CpuType.S71200;

        [ConfigParameter("IP地址")]
        public string IpAddress { get; set; } = "127.0.0.1";

        [ConfigParameter("端口号")]
        public int Port { get; set; } = 102;

        [ConfigParameter("Rack")]
        public short Rack { get; set; } = 0;

        [ConfigParameter("Slot")]
        public short Slot { get; set; } = 0;

        [ConfigParameter("超时时间ms")]
        public int Timeout { get; set; } = 3000;

        [ConfigParameter("最小通讯周期ms")]
        public uint MinPeriod { get; set; } = 3000;

        #endregion

        public SiemensS7(string device, ILogger logger)
        {
            _device = device;
            _logger = logger;

            _logger.LogInformation($"Device:[{_device}],Create()");
        }


        public bool IsConnected
        {
            get
            {
                return plc != null && plc.IsConnected;
            }
        }

        public bool Connect()
        {
            try
            {
                plc = new Plc(CpuType, IpAddress, Port, Rack, Slot);
                plc.ReadTimeout = Timeout;
                plc.WriteTimeout = Timeout;
                plc.Open();
            }
            catch (Exception)
            {
                return false;
            }
            return IsConnected;
        }

        public bool Close()
        {
            try
            {
                plc?.Close();
                return !IsConnected;
            }
            catch (Exception)
            {

                return false;
            }
        }

        public void Dispose()
        {
            try
            {
                plc = null;
            }
            catch (Exception)
            {

            }
        }

        [Method("读西门子PLC标准地址", description: "读西门子PLC标准地址")]
        public DriverReturnValueModel Read(DriverAddressIoArgModel ioarg)
        {
            var ret = new DriverReturnValueModel { StatusType = VaribaleStatusTypeEnum.Good };

            if (plc != null && plc.IsConnected)
            {
                try
                {
                    ret.Value = plc.Read(ioarg.Address);
                    if (ioarg.ValueType == DataTypeEnum.Float)
                    {
                        var buffer = new byte[4];

                        buffer[3] = (byte)((uint)ret.Value >> 24);
                        buffer[2] = (byte)((uint)ret.Value >> 16);
                        buffer[1] = (byte)((uint)ret.Value >> 8);
                        buffer[0] = (byte)((uint)ret.Value >> 0);
                        ret.Value = BitConverter.ToSingle(buffer, 0);
                    }
                }
                catch (Exception ex)
                {

                    ret.StatusType = VaribaleStatusTypeEnum.Bad;
                    ret.Message = $"读取失败,{ex.Message}";
                }
            }
            else
            {
                ret.StatusType = VaribaleStatusTypeEnum.Bad;
                ret.Message = "连接失败";
            }
            return ret;
        }

        [Method("读字符串", description: "读字符串")]
        public DriverReturnValueModel ReadString(DriverAddressIoArgModel ioarg)
        {
            var ret = new DriverReturnValueModel { StatusType = VaribaleStatusTypeEnum.Good };

            if (plc != null && plc.IsConnected)
            {
                try
                {
                    int db = int.Parse(ioarg.Address.Trim().Split(',')[0]);
                    int startAdr = int.Parse(ioarg.Address.Trim().Split(',')[1]);
                    int count = int.Parse(ioarg.Address.Trim().Split(',')[2]);
                    var buffers = plc.ReadBytes(DataType.DataBlock, db, startAdr, count);
                    var str = Encoding.ASCII.GetString(buffers);
                    if (str.Contains('\0'))
                        str = str.Split('\0')[0];
                    ret.Value = str;
                }
                catch (Exception ex)
                {

                    ret.StatusType = VaribaleStatusTypeEnum.Bad;
                    ret.Message = $"读取失败,{ex.Message}";
                }
            }
            else
            {
                ret.StatusType = VaribaleStatusTypeEnum.Bad;
                ret.Message = "连接失败";
            }
            return ret;
        }

        //预留了大小端转换的 
        private ushort[] ChangeBuffersOrder(ushort[] buffers, DataTypeEnum dataType)
        {
            var newBuffers = new ushort[buffers.Length];
            if (dataType.ToString().Contains("32") || dataType.ToString().Contains("Float"))
            {
                var A = buffers[0] & 0xff00;//A
                var B = buffers[0] & 0x00ff;//B
                var C = buffers[1] & 0xff00;//C
                var D = buffers[1] & 0x00ff;//D
                if (dataType.ToString().Contains("_1"))
                {
                    newBuffers[0] = (ushort)(A + B);//AB
                    newBuffers[1] = (ushort)(C + D);//CD
                }
                else if (dataType.ToString().Contains("_2"))
                {
                    newBuffers[0] = (ushort)((A >> 8) + (B << 8));//BA
                    newBuffers[1] = (ushort)((C >> 8) + (D << 8));//DC
                }
                else if (dataType.ToString().Contains("_3"))
                {
                    newBuffers[0] = (ushort)((C >> 8) + (D << 8));//DC
                    newBuffers[1] = (ushort)((A >> 8) + (B << 8));//BA
                }
                else
                {
                    newBuffers[0] = (ushort)(C + D);//CD
                    newBuffers[1] = (ushort)(A + B);//AB
                }
            }
            else if (dataType.ToString().Contains("64") || dataType.ToString().Contains("Double"))
            {
                if (dataType.ToString().Contains("_1"))
                {

                }
                else
                {
                    newBuffers[0] = buffers[3];
                    newBuffers[1] = buffers[2];
                    newBuffers[2] = buffers[1];
                    newBuffers[3] = buffers[0];
                }
            }
            else
            {
                if (dataType.ToString().Contains("_1"))
                {
                    var h8 = buffers[0] & 0xf0;
                    var l8 = buffers[0] & 0x0f;
                    newBuffers[0] = (ushort)(h8 >> 8 + l8 << 8);
                }
                else
                    newBuffers[0] = buffers[0];
            }
            return newBuffers;
        }

        public async Task<RpcResponse> WriteAsync(string RequestId, string Method, DriverAddressIoArgModel Ioarg)
        {
            RpcResponse rpcResponse = new() { IsSuccess = false };
            try
            {
                if (!IsConnected)
                    rpcResponse.Description = "设备连接已断开";
                else
                {
                    object toWrite = null;
                    switch (Ioarg.ValueType)
                    {
                        case DataTypeEnum.Bit:
                        case DataTypeEnum.Bool:
                            toWrite = Ioarg.Value.ToString().ToLower() == "true" || Ioarg.Value.ToString().ToLower() == "1";
                            break;
                        case DataTypeEnum.UByte:
                            toWrite = byte.Parse(Ioarg.Value.ToString());
                            break;
                        case DataTypeEnum.Byte:
                            toWrite = sbyte.Parse(Ioarg.Value.ToString());
                            break;
                        case DataTypeEnum.Uint16:
                            toWrite = ushort.Parse(Ioarg.Value.ToString());
                            break;
                        case DataTypeEnum.Int16:
                            toWrite = short.Parse(Ioarg.Value.ToString());
                            break;
                        case DataTypeEnum.Uint32:
                            toWrite = uint.Parse(Ioarg.Value.ToString());
                            break;
                        case DataTypeEnum.Int32:
                            toWrite = int.Parse(Ioarg.Value.ToString());
                            break;
                        case DataTypeEnum.Float:
                            toWrite = float.Parse(Ioarg.Value.ToString());
                            break;
                        case DataTypeEnum.AsciiString:
                            toWrite = Encoding.ASCII.GetBytes(Ioarg.Value.ToString());
                            break;
                        default:
                            rpcResponse.Description = $"类型{DataTypeEnum.Float}不支持写入";
                            break;
                    }
                    if (toWrite == null)
                        return rpcResponse;

                    //通用方法
                    if (Method == nameof(Read))
                    {
                        plc.Write(Ioarg.Address, toWrite);

                        rpcResponse.IsSuccess = true;
                        return rpcResponse;
                    }
                    //字符串
                    else if (Method == nameof(ReadString))
                    {
                        int db = int.Parse(Ioarg.Address.Trim().Split(',')[0]);
                        int startAdr = int.Parse(Ioarg.Address.Trim().Split(',')[1]);
                        int count = int.Parse(Ioarg.Address.Trim().Split(',')[2]);
                        //防止写入到其他地址 进行截断
                        if (((byte[])toWrite).Length > count)
                            toWrite = ((byte[])toWrite).Take(count);
                        plc.Write(DataType.DataBlock, db, startAdr, toWrite);

                        rpcResponse.IsSuccess = true;
                        return rpcResponse;
                    }
                    else
                        rpcResponse.Description = $"不支持写入:{Method}";
                }
            }
            catch (Exception ex)
            {
                rpcResponse.Description = $"写入失败,[Method]:{Method},[Ioarg]:{Ioarg},[ex]:{ex}";
            }
            return rpcResponse;
        }
    }
}