Yamaha DRCX User Manual page 39

No. Symptom Probable causes
7)
8)
Cannot make 1)
2
TELNET
connection or
cannot
terminate the 2)
TELNET
connection
right away.
(ping reply is 3)
normal).
4)
5)
6)
An OK does 1)
3
not come
back after
login, or no
replay comes
back even 2)
after issuing a
command.
(Some unit
control 3)
commands
are useable
such as
LOGOUT or
BYE.)
Wrong IP
• Check the settings after referring to "2-
address, subnet 4-2 Setting the IP address" p. 10, "2-4-
mask or gateway 3 Setting the subnet mask" p. 12, and
settings on "2-4-4 Setting the gateway" p. 13.
controller.
Ethernet unit is • Try substituting the Ethernet unit.
defective
Wrong IP • Check that the IP address of the
address used controller you are attempting to
during Telnet connect with is correct.
connection
Wrong Port No. • Check that the port No. of the
used during controller you are attempting to
TELNET connect with is correct.
connection.
The controller is • When connected, the message "telnet is
already logged in already used!" appears.
with another
TELNET
terminal.
Alarm issued to • Alarm message appears when
controller.
connected.
• Connect the TPB and check for an
alarm.
• Status led is lit up in red.
IP address is the
• Check if the IP address and MAC
same as another address have a correct match by using
network device. the "arp" command incorporated in the
OS.
• Check all devices on the network to
find if the same IP address is being
used.
Network traffic
• Check if the traffic load is appropriate.
(communication
data load) is too
heavy.
Ethernet unit is
• See "2-4-1 Enabling the Ethernet Unit"
not enabled and (p. 9) and check if the Ethernet Unit is
not identified enabled.
(recognized) by
controller.
I/O custom • Check the I/O signal (Check on the
command input sequencer monitor, etc.)
signal is set ON.
• Communication error is issued when
TPB is connected to controller.
Commands such • Reply comes back after axis movement
as origin return, or writing data.
axis movement
commands, or
data write
commands are
being run from
I/O or RS/232C.
Checkpoints
33
CHAPTER2 Ethernet Unit
Action
• Redo the IP address, subnet mask and
gateway settings correctly. Then turn
on the controller power again.
• If operation returns to normal, then the
Ethernet unit is probably defective, so
replace the Ethernet unit.
• Enter the correct IP address.
• Enter the correct IP address.
• Await termination of current TELNET
connection.
• Troubleshoot according to the type of
alarm.
• If the IP address and MAC address do
not match each other, then the IP
address is wrong, so try redoing the
settings.
• If found to be the same as another
device, change the setting.
• Change the network structure to get a
smaller traffic load.
• Enable the Ethernet unit and turn on
the power to the controller again.
• Always use a pulse input for the
custom command input.
• When issuing TELNET commands, do
not run commands from the I/O or RS-
232C.