private MBMessage SendRequest(MBMessage req)
{
try
{
SocketError err;
byte[] buff = req.encode();
//log.DebugFormat("> {0:##}", ValueHelper.BytesToHexStr(buff));
byte[] ack = _client.SSend(req.encode(), out err);
//log.DebugFormat("< {0:##}, err={1}", ValueHelper.BytesToHexStr(ack), err);
if (SocketError.Success != err)
{
log.ErrorFormat("异常: {0}", err);
}
MBMessage resp = new MBMessage(ack);
if (resp.FC > 0x80)
{
byte ec = resp.GetByte(0);
log.ErrorFormat("Modbus 异常: {0}-{1} ", ec, MBException.NameOf(ec));
}
return resp;
}
catch (Exception)
{
return null;
}
}
// 异步发送应答.
public void ASend(MBMessage resp)
{
if (resp != null)
{
byte[] buff = resp.encode();
if (this._socket != null)
{
Ack++;
Sent += buff.Length;
this._socket.Send(buff);
}
}
}