private MBMessage AckReadCoil(MBMessage req)
{
MBMessage resp = new MBMessage(req);
/**
* req:
* Byte 1-2:Reference number
* Byte 3-4:Bit count (1-2000)
* resp:
* Response
* Byte 1: Byte count of response (B=(bit count+7)/8)
* Byte 2-(B+1):Bit values (least significant bit is first coil!)"
*/
ushort refNum = req.GetWord(0);
ushort bitCount = req.GetWord(2);
if (_cms.IsValidRegAddress((byte)refNum))
{
byte[] byteValues = _cms.MB_ReadCoils(refNum, bitCount);
// 写入.
var bcnt = byteValues.Length;
resp.SetBodySize((ushort)(bcnt + 1));
resp.SetByte(0, (byte)bcnt);
for (byte i = 0; i < bcnt; i++)
{
resp.SetByte(i + 1, byteValues[i]);
}
}
else
{
// Error Response.
// Byte 0:FC = 81 (hex)
// Byte 1:exception code = 01 or 02
resp.FC = 0x82;
resp.SetBody(new byte[] { MBException.E02_ILLEGAL_DATA_ADDRESS });
}
return resp;
}
MBMessage NewWriteCoil(ushort addr, bool onOff)
{
MBMessage req = new MBMessage();
req.TID = 0xFF;
req.UID = 0x01;
req.PID = 0;
req.FC = 0x05;
req.SetBodySize(4);
req.SetWord(0, addr); // 单樘门开门控制信号 - 读/写 0x11
req.SetByte(2, onOff ? (byte)0xFF : (byte)0x00); // 读取16*6个字节
req.SetByte(3, 0x00);
return req;
}