Toshiba V Series User Manual page 220

Chapter 8 Error Handling
8
200
(c) Send request
Start
Is the USEND_T
instruction completed ?
Yes
Is the station status such
that run + socket transmission
is enabled ?
Yes
Is the TCP connection
established ?
Yes
Is the socket status
RCLOSE bit 1 or 0 ?
0
Is the socket status
NOACK bit 1 or 0 ?
0
Does a response come
back if a PING is issued to the
remote station ?
Yes
Is the error counter
read out from the RAS information
constant ?
Yes
Refer to the completion status and
eliminate the cause of the error.
End
Confirm the status when the
No
USEND_T or URCV_T is not
completed.
Set the station to run + socket
No
transmission enabled using an
operating mode control request.
Establish the connection between the
No
local TCP and the remote TCP.
1
Close the socket.
1
Close the socket.
1) Check the remote station IP
address and message transmission
UDP port number again.
No
2) Configure the router if there is a
router on the transmission line.
3) Check the network verification
items.
It is possible that there is an error on
No
the network itself. Check the network
verification items.
RAS error counters: Alignment error
Short packet, CRC error
Ethernet module User's Manual