2.2 Basic Module
2.2.4 218IFA Module (Ethernet)
2-30
Note: 1. Transmission status
In online mode, displays the transmission status for each connection.
2. Error status
If an error is indicated in the transmission status, the error details are shown.
Transmission Status State
IDLE
IDLE
WAIT
WAIT (waiting for connection)
CONNECT
CONNECT (capable of transmitting and receiving data)
–
Unused connection
Error Status State Remarks
No Error
Normal –
Socket Generation Error
System error Socket generation failed
Local Port Number Error
Error in setting the local port num-
ber (the same address is bound while
disconnecting the TCP connection)
Bind error (duplicated port number)
A bind error occurred while aborting using
the MSG function and ending the connec-
tion.
The error occurs if Execute is turned ON
within one minute after an Abort is com-
pleted.
Before the connection was completed,
another function issued a command to the
same remote station.
Socket Attribute Change
Error
System error (in TCP)
An error occurred while setting a socket
attribute.
Connection Error
(M-SND)
Connection error (when actively
open in TCP, a connection is
rejected by the node station)
Tried to connect using the MSG-SND func-
tion, but the connection was rejected by the
remote station, and the command was reset.
When disconnecting the cable, retried con-
necting for one minute (default value) with-
out a response.
Connection Error
(M-RCV)
Connection error (when passively
open in TCP)
An error occurred while receiving the con-
nection from the MSG-RCV function.
System Error
System error
A socket polling (select specification) error
occurred while receiving data.
Data Transmit Error
(TCP)
Data transmit error (in TCP, either
there is no node station or a node
station did not startup.)
A response transmit error occurred in the
MSG-RCV function. An error also occurred
in the MSG-SND function.
An error occurred only in TCP when there
was no node station to transmit or a node sta-
tion was rebooted.
Data Transmit Error
(UDP)
Data transmit error (in UDP)
A transmit request was issued to a nonexist-
ent socket.
Data Receive Error
(TCP)
Data receive error (in TCP, a request
to disconnect the connection is
received from the node station)
An error occurred when disconnecting the
connection from the node station. It also may
occur even when close is processed properly.
Data Receive Error
(UDP)
Data receive error (in UDP)
A data receive command was issued to a
nonexistent socket.
Socket Option Change
Error
System error Error when changing a socket option
Data Change Error
Data change error Protocol change error
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