//根据请求对象转成发送的字节数组
public static byte[] ToBytes(Request request, out string errMsg)
{
errMsg = "";
try
{
switch (request.Type)
{
case RequestType.Read:
{
// 8 个字节
byte[] buffer = new byte[2];
buffer[0] = request.PlcAddress;
buffer[1] = 0x03;
buffer = buffer.Concat(ByteUtil.ToBytes(request.RegisterBeginAddress)) // 2,3
.Concat(ByteUtil.ToBytes(request.RegisterCount)).ToArray(); // 4,5
return(CRCTool.AddCRC(buffer)); // 6,7
//测试代码
//ModbusRTURequest m = new ModbusRTURequest();
//m.PlcAddress = 0x01;
//m.Type = RequestType.Read;
//m.RegisterBeginAddress = 0x0002;
//m.RegisterCount = 0x00001;
//byte[] aa = ModbusRTURequest.ToBytes(m);
}
case RequestType.Write:
{
// 8 个字节
byte[] buffer = new byte[2];
buffer[0] = request.PlcAddress;
buffer[1] = 0x06;
buffer = buffer.Concat(ByteUtil.ToBytes(request.RegisterBeginAddress)) // 2,3
.Concat(ByteUtil.ToBytes(request.RegisterValue)).ToArray(); // 4,5
return(CRCTool.AddCRC(buffer)); // 6,7
//// 测试代码
//ModbusRTURequest m = new ModbusRTURequest();
//m.PlcAddress = 0x01;
//m.Type = RequestType.Write;
//m.RegisterBeginAddress = 0x0003;
//m.RegisterValue = 0x003A;
//byte[] aa = ModbusRTURequest.ToBytes(m);
}
case RequestType.WriteMulti:
{
// 8+1+N*2个字节
byte[] buffer = new byte[2];
buffer[0] = request.PlcAddress;
buffer[1] = 0x10;
buffer = buffer.Concat(ByteUtil.ToBytes(request.RegisterBeginAddress)) // 2,3
.Concat(ByteUtil.ToBytes(request.RegisterCount)).ToArray(); // 4,5
buffer = ByteUtil.BytesAddOne(buffer, request.DataLength); //6
buffer = buffer.Concat(ByteUtil.ToBytes(request.Values)).ToArray(); //7---(7+n*2)-1
return(CRCTool.AddCRC(buffer));
//// 测试代码 01 10 0003 0002 04 0001 0002 63 BB
//ModbusRTURequest m = new ModbusRTURequest();
//m.PlcAddress = 0x01;
//m.Type = RequestType.WriteMulti;
//m.RegisterBeginAddress = 0x0003;
//m.RegisterCount = 0x0002;
//m.DataLength = 0x04;
//m.WriteMultiValues = new ushort[2] { 0x01, 0x02 };
//m.RegisterValue = 0x003A;
//byte[] aa = ModbusRTURequest.ToBytes(m);
}
}
}
catch (Exception e)
{
errMsg = "根据modbus请求对象转字节数组失败：" + e.Message;
return(null);
}
errMsg = "根据modbus请求对象转字节数组失败";
return(null);
}