Appendices
A-44
NJ-series Instructions Reference Manual (W502)
Name Status Error Error code 16#2003
Meaning The status was not suitable for execution of the instruction.
Effects User program Continues. Operation The relevant instruction will end according to specifica-
tions.
System-defined
variables
Variable Data type Name
None --- ---
Cause and
correction
Assumed cause Correction Prevention
• SktUDPRcv Instruction
• The socket is receiving data.
• The socket is not open.
• SktUDPSend Instruction
• The socket is sending data.
• The socket is not open.
• SktTCPAccept Instruction
The specified TCP port is in one of
the following states.
• The port is being opened.
• The port is being closed.
• A connection is already estab-
lished for this instruction for the
same IP address and TCP port.
• SktTCPConnect Instruction
• The TCP port that is specified
with the SrcTcpPort input variable
is already open.
• The remote node that is specified
with DstAdr input variable does
not exist.
• The remote node that is specified
with DstAdr and DstTcpPort input
variables is not waiting for a con-
nection.
• SktTCPRcv Instruction
• The specified socket is receiving
data.
• The specified socket is not con-
nected.
• SktTCPSend Instruction
• The specified socket is sending
data.
• The specified socket is not con-
nected.
Remove the cause of the error for the
instruction.
Do not execute the instruction when it
will cause an error.
Precautions/
Remarks
None
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