FP_ETHERNET_CONNECTION_OPEN

Open an Ethernet connection

This FP instruction opens an Ethernet connection on the port specified by nPort. Please ensure the suitable parameters are also set in the project navigator under “System registers” > “Ethernet” > “User connections”.

Parameters

Input

nPort (WORD, INT, UINT)

Ethernet port on CPU (FP7 E types):

SYS_ETHERNET_USER_CONNECTION_1–SYS_ETHERNET_USER_CONNECTION_216

Output

bError (BOOL)

if a timeout of the connection is exceeded
if an IP address is invalid

When an error occurs, check the system variable sys_iEthernetConnectionErrorCode for the error code number.

Example

POU header

All input and output variables used for programming this function have been declared in the POU header. The same POU header is used for all programming languages.

	VAR
		bSetConnection: BOOL:=FALSE;
		bOpenConnection: BOOL:=FALSE;
		bCloseConnection: BOOL:=FALSE;
	END_VAR

POU body

When the variable bOpenConnection changes from FALSE to TRUE and the system variable sys_bIsEthernetIPAddressAssigned is set to TRUE, the function is carried out.

LD body

BODY
    WORKSPACE
        NETWORK_LIST_TYPE := NWTYPELD ;
        ACTIVE_NETWORK := 0 ;
    END_WORKSPACE
    NET_WORK
        NETWORK_TYPE := NWTYPELD ;
        NETWORK_LABEL :=  ;
        NETWORK_TITLE :=  ;
        NETWORK_HEIGHT := 4 ;
        NETWORK_BODY
B(B_CONTACT,,bOpenConnection,5,1,7,3,R);
B(B_CONTACT,,sys_bIsEthernetIPAddressAssigned,17,1,19,3,N);
B(B_VARIN,,SYS_ETHERNET_USER_CONNECTION_1,30,2,32,4,);
B(B_VAROUT,,bError,49,2,51,4,);
B(B_F,FP_ETHERNET_CONNECTION_OPEN!,,32,0,49,4,,?DEN?DnPort?AENO?CbError);
L(1,2,5,2);
L(19,2,32,2);
L(7,2,17,2);
L(1,0,1,4);
        END_NETWORK_BODY
    END_NET_WORK
END_BODY

ST body

If DF(bOpenConnection) AND sys_bIsEthernetIPAddressAssigned then
    FP_ETHERNET_CONNECTION_OPEN(nPort := SYS_ETHERNET_USER_CONNECTION_1);
END_IF;