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8.5 Troubleshooting
8
(d) Receive request
Start
End
Refer to the completion status
and eliminate the cause of the
error.
Is the USEND_T
instruction completed ?
A timeout occurred ?
Error status --- 2848
No
Yes
Yes
1) Check the slave station IP address
and message transmission UDP
port number again.
2) Configure the router if there is a
router on the transmission line.
3) Check the network verification
items.
Transmit a message to the remote
node.
Is the remote node
transmitting ?
No
Yes
No
Yes
Does a response come
back if a PING is issued to the
remote station ?
No
Yes
Is the error counter
read out from the RAS information
constant ?
RAS error counters: Alignment error
Short packet, CRC error
Confirm the status when the
USEND_T or URCV_T is not
completed.
It is possible that there is an error on
the network itself. Check the network
verification items.
Is the station status
such that run + socket
transmission is
enabled ?
Set the station to run + socket
transmission enabled using an
operating mode control request.
Yes
Is the waiting time set
to unlimited ?
No
No
No
Establish the connection with
the remote node.
Is the connection
established ?
Yes
No
Yes
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