public static int CreateMsg_ModBus(MODBUS_RX_MSG MBRM, ref byte[] Buf)
{
int i = 0;
Buf[i++] = (byte)MBRM.Addr;
Buf[i++] = (byte)(MBRM.FuncCode);
Buf[i++] = (byte)(MBRM.Offset >> 8);
Buf[i++] = (byte)(MBRM.Offset & 0xff);
Buf[i++] = (byte)(MBRM.Length >> 8);
Buf[i++] = (byte)(MBRM.Length & 0xff);
MBRM.CheckValue = Tools.GetCrc16(Buf, i);
Buf[i + 1] = (byte)(MBRM.CheckValue >> 8);
Buf[i] = (byte)(MBRM.CheckValue & 0xff);
return(i + 2);
}
private MODBUS_TX_MSG ThreadGetMsg(int Offset, int Count)
{
MODBUS_RX_MSG MBRM = new MODBUS_RX_MSG();
MODBUS_TX_MSG MBTM = new MODBUS_TX_MSG();
MBTM.Buf = new byte[100];
byte[] RxBuffer = new byte[200];
byte[] TxBuffer = new byte[200];
MBRM.Addr = Value.RSValue.RS485Addr;
MBRM.FuncCode = 0x03;
MBRM.Length = Count;
MBRM.Offset = (byte)Offset;
int Length = 标准ModBus.CreateMsg_ModBus(MBRM, ref TxBuffer);
Length = Usart.SendData(serialPort1, TxBuffer, Length, ref RxBuffer, 200);
标准ModBus.Export_ModBus(ref MBTM, ref RxBuffer);
return(MBTM);
}
private MODBUS_TX_MSG GetMsg(int Offset, int Count)
{
MODBUS_RX_MSG MBRM = new MODBUS_RX_MSG();
MODBUS_TX_MSG MBTM = new MODBUS_TX_MSG();
MBTM.Buf = new byte[100];
byte[] RxBuffer = new byte[200];
byte[] TxBuffer = new byte[200];
MBRM.Addr = byte.Parse(comboBox3.Text);
MBRM.FuncCode = 0x03;
MBRM.Length = Count;
MBRM.Offset = (byte)Offset;
int Length = 标准ModBus.CreateMsg_ModBus(MBRM, ref TxBuffer);
serialPort1.ReadTimeout = 500;
Length = Usart.SendData(serialPort1, TxBuffer, Length, ref RxBuffer, 200);
标准ModBus.Export_ModBus(ref MBTM, ref RxBuffer);
return(MBTM);
}