7.5 CP-218 Transmission Definitions
7-25
7
8. Error Status
Displays the error details when an error has occurred in the transmission status.
9. Send Count (Transmission Line Counter)
Displays the amount of data (number of packets) transmitted to the remote station.
10.Receive Count (Reception Path Counter)
Displays the amount of data (number of packets) received from the remote station.
Table 7.7 Error Status
Status Meaning Remarks
No Error No error
-
Socket Generation Error System error Socket generation failure
Local Station Port Number
Error
Local station port number setting error.
(Binds the same address during disconnection of
the TCP connection.)
1. Binding error: Port number duplication
2. When the ABORT function was executed, a
binding error occurred during disconnection.
ABORT → COMPLETE → after 1 minute
→ Error occurs if EXECUTE sequence is
executed within 1 minute.
3. The same connection was executed by
another function before Connect completion.
Socket Attribute Change
Error
System error (with TCP settings) An error occurred while the socket attributes
were being set.
Connection Error
(M-SND)
Connection error
(When active open mode was used in the TCP
settings, the connection was rejected by a remote
station.)
1. This error occurs when M-SND → Connect
→ Reset.
2. This error occurs if a retry is performed
when the line is disconnected, and after one
minute (default) the next retry also fails.
Connection Error
(M-RCV)
Connection error
(When passive open mode is used in the TCP
settings)
M-RCV accept error
System Error System error A socket polling (select) error occurred during
data reception.
Data Sending Error
(TCP)
Data sending error
(There is no remote station in the TCP settings,
or the remote station has not been started up.)
A response transmission error occurred with M-
RCV. This also occurred with M-SND.
There is no transmission destination, or TCP
only when the transmission destination is reboo-
ted.
Data Sending Error
(UDP)
Data sending error (with UDP settings) A request to send was issued by a non-existent
socket.
Data Receiving Error
(TCP)
Data receiving error
(A request to disconnect the connection was
received from the remote station in the TCP set-
tings.)
The connection was disconnected by the remote
station.
(Normally, this also occurs after close processing
is performed.)
Data Receiving Error
(UDP)
Data receiving error (with UDP settings) Receive From was executed for a non-existent
socket.
Socket Option Change Er-
ror
System error An error occurred while the socket option was
being changed.
Data Conversion Error Data conversion error
(Data conversion failed in MEMOBUS and
MELSEC-A communications.)
Protocol conversion error
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