2 Instruction Descriptions
2-786
NJ-series Instructions Reference Manual (W502)
SktClose
The SktClose instruction closes the specified TCP or UDP socket for the built-in EtherNet/IP.
The SktClose instruction closes the socket that is specified with Socket. If a TCP socket is specified, the
socket is disconnected before it is closed. If the socket handle Socket.Handle is 0, all TCP and UDP
ports that currently use the socket service are closed. Close processing for the TCPUDP sockets is
completed when the instruction is completed normally (i.e., when the value of Done changes to TRUE).
Instruction Name
FB/
FUN
Graphic expression ST expression
SktClose Close
TCP/UDP
Socket
FB None SktClose_instance(Execute,
Socket, Done, Busy, Error,
ErrorID);
Variables
Name Meaning I/O Description Valid range Unit Default
Socket Socket Input Socket
--- --- ---
Boolean
Bit strings Integers
Real
numbers
Times, durations,
dates, and text strings
BOOL
BYTE
WORD
DWORD
LWORD
USINT
UINT
UDINT
ULINT
SINT
INT
DINT
LINT
REAL
LREAL
TIME
DATE
TOD
DT
STRING
Socket Refer to Function for details on the structure _sSOCKET.
Function
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