Mitsubishi Q01CPU User Manual page 364

12
TROUBLESHOOTING
(From previous page)
Is TCP or UDP in MELSOFT
connection used for more than
the number of modules set
by the parameter?
NO
TCP/IP?
NO
In the detailed
host station setting of
"Transfer Setup", increase the time out
value or the number of retries.
Is communication now
available?
NO
(To next page)
12
- 40 12.2 Troubleshooting
12.2.27 When Ethernet communication with the target device is not available
Use TCP or UDP in
YES MELSOFT connection for
the specified number of
modules or less.
Is Ethernet
NO
communication available with
the target device?
YES
Has any device been
NO
turned off during TCP/IP connection?
YES
Perform the following.
Wait for a little while (approx. 1 min.),
and retry it after the connection is closed
by the alive check function of
QnUDE(H)CPU.
Increase the number of connections in the
setting to allow some spare connections.
Is Ethernet
NO
communication available with
the target device?
Perform the following.
Set a time out value or number
YES
of retries again.
Consult your network administrator
and check the network status.
Is Ethernet
NO
communication available with
the target device?
YES
YES
YES
Completed