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8.5 Troubleshooting
8
(4) When computer link protocol transmission fails
(a) Host computer side (main station)
Start
End
Check the slave station EN311 IP
address.
Check the slave station message
transmission UDP port number.
Note: There are separate send and
receive ports that each have
their own message transmission
UDP port number.
Is the transmission
destination IP address set
to that of the slave station
EN311 ?
Is the slave station message
transmission UDP port number
correct ?
Check the network verification items
(except the items related to the
EN311).
No
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.
Does a response come
back if a PING is issued
to the slave station
EN311 ?
No
Yes
Check the computer link protocol
format.
Is there any error on the
computer link protocol ?
No
Yes
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