3-23
3 Error Tables
NJ-series Troubleshooting Manual (W503)
3-1 Errors by Source
3
3-1-2 Errors in the PLC Function Module
54012003 hex Status Error The status was not suit-
able for execution of the
instruction.
• SktUDPRcv Instruc-
tion
• The socket is receiv-
ing data.
• The socket is not
open.
• SktUDPSend Instruc-
tion
• The socket is send-
ing data.
• The socket is not
open.
• SktTCPAccept Instruc-
tion
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 established
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 vari-
able does not exist.
• The remote node
that is specified with
DstAdr and DstTcp-
Port input variables
is not waiting for a
connection.
• SktTCPRcv Instruc-
tion
• The specified socket
is receiving data.
• The specified socket
is not connected.
• SktTCPSend Instruc-
tion
• The specified socket
is sending data.
• The specified socket
is not connected.
S NJ-series
Instruc-
tions Ref-
erence
Manual
(Cat. No.
W502)
54012004 hex Local IP Address
Not Set
The local IP address was
not set when a socket ser-
vice instruction was exe-
cuted.
• There is a BOOTP
server setting error.
• The BOOTP server
does not exist.
• The local IP address is
not set because oper-
ation just started.
S Same as
abo
ve.
Event code Event name Meaning Assumed cause
Level
Refer-
ence
Maj Prt Min Obs Info
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