Toshiba V Series User Manual page 216

Chapter 8 Error Handling
8
196
(b) Send request
Start
Is the USEND_T instruction
completed ?
Yes
Is the station status such that
run + socket transmission is
enabled ?
Yes
Is the transmission
destination IP correct ?
Yes
Are the UDP ports on the local
and remote nodes opened ?
Yes
Does the status indicate a
normal completion ?
Yes
Does a response come
back if a PING is issued
to the slave station
EN311 ?
Yes
Is the error counter read out
from the RAS information
constant ?
Yes
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.
Verify the remote station IP address.
No
Open the UDP ports on the local and
No
remote nodes.
Refer to the completion status and
No
eliminate the cause of the error.
1) Check the slave 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.
Is the error counter read out from the
No
RAS information constant ?
RAS error counters: Alignment error
Short packet, CRC error
Ethernet module User's Manual