ftpConnected (Function)

This function will test whether a connection to the FTP server has been established.

The connection state information is based on an expected response from the FTP server and does therefore not reflect the socket connection establishment itself.

Input:

ID : INT

The ID returned from ftpConnect.

Returns: BOOL

True if connected to server, false if not.

Declaration:

FUNCTION ftpConnected : BOOL;
VAR_INPUT
   ID     : INT;
END_VAR;

Example:

INCLUDE rtcu.inc
 
PROGRAM example;
VAR
   open  : BOOL;
   host  : STRING := "ftp.domain.com";
   usr   : STRING := "ftpuser";
   pwd   : STRING := "user pwd";
   
   id    : INT;
END_VAR;
 
   gsmPower(power := ON);
   gprsOpen();
 
BEGIN
  open := (ftpOpen() = 0);
  IF open THEN
     id := ftpConnect(host := host, username := usr, password := pwd);
     IF ftpConnected(id := id) THEN
     .
     ...
     END_IF;
     ftpDisconnect(id := id);
  END_IF;
  ftpClose();
END;
END_PROGRAM;