Request re-transmit message
This message can be sent by the client application to the server (the EK80 program) if it detects that messages have been lost.
typedef struct
  {
  ParamMsgHdrDef hdr;
  } RequestRetransmitMessageDef;
•  The lMsgID field of the hdr will have the value 4 (const long lPM_REQUEST_RETRANSMITT = 4).
•  The lSeqNo field of the hdr must be set to the message/UDP package that shall be re-transmitted.