private void OpenSession(string channel, ushort mb_addr)
{
// See if we are supposed to connect to an existing session
if (this.SessionId != null)
{
this.MbSlaveSession = (SMBSession)TMWSession.LookupSession(Convert.ToUInt32(this.SessionId));
if (this.MbSlaveSession != null)
{
this.Channel = (MBChannel)this.MbSlaveSession.Channel;
this.Channel.SessionCloseEvent += new TMWChannel.SessionCloseEventDelegate(SessionCloseEvent);
}
else
{
throw new Exception("Unable to load Modbus Slave Simulator. Unable to find session.");
}
}
else
{
try
{
MbSlaveSession = new SMBSession(Channel);
MbSlaveSession.SlaveAddress = mb_addr;
MbSlaveSession.Name = "sMBSim_" + mb_addr;
MbSlaveSession.OpenSession();
}
catch (Exception ex)
{
MessageBox.Show("Error Opening: " + ex.Message);
Channel = null;
MbSlaveSession = null;
Close();
return;
}
}
}
/// <summary>
/// Closes the channel
/// </summary>
private void CloseChannel()
{
if (this.Channel != null)
this.Channel.CloseChannel();
this.Channel = null;
}
/// <summary>
/// Open Channel
/// </summary>
/// <param name="port"></param>
/// <param name="total_ports"></param>
private string OpenChannel(ushort port)
{
// if we are already connected disconnect
if (this.Channel != null)
{
if (this.Channel.Name == "sMBSim_" + port)
{
CloseSession();
CloseChannel();
}
}
try
{
Channel = new MBChannel(TMW_CHANNEL_OR_SESSION_TYPE.SLAVE);
Channel.Type = WINIO_TYPE.TCP;
Channel.WinTCPipPort = Convert.ToUInt16(port);
Channel.WinTCPipAddress = IP;
Channel.WinTCPmode = TCP_MODE.SERVER;
Channel.Name = "sMBSim_" + port;
Channel.Protocol = TMW_PROTOCOL.MB;
Channel.OpenChannel();
return Channel.Name;
}
catch (Exception ex)
{
MessageBox.Show("Error Opening: " + ex.Message);
Channel = null;
Close();
return null;
}
}
