Yamaha DRCX User Manual page 40

CHAPTER2 Ethernet Unit
No. Symptom
4 Program 1)
stops by itself
during
automatic
operation.
2)
3)
4)
5)
Probable causes
TELNET
communication
cuts off by itself
without a
LOGOUT or
BYE command
being issued.
TELNET • Check the TELNET parameter to find
parameter was if it was set to stop operation during
set to stop logout.
operation during
logout.
Communication • Check the TELNET parameter to find
status continues
if communication status is longer than
for a fixed period the time set for timeout.
and then cuts off
automatically at
timeout.
No-response • Check if a cable is detached or power
status continues supply for the HUB or other equipment
for a fixed period is off.
versus the keep-
• Check if operating problems are
alive packet and occurring in devices such as the HUB
then cuts off due to noise, etc.
automatically at • Too short of a period was set for the
timeout. no-response timeout period.
Ethernet unit is • Try substituting with another Ethernet
defective. unit.
Checkpoints
34
Action
• Always use a LOGOUT or BYE
command to terminate a TELNET
communication.
• Reset the parameter so operation
continues during logout.
• Set so communication time does not
exceed the timeout limit. Otherwise
increase the communication timeout
period or disable the timeout function.
• Check the network and repair/restore
any problem locations.
• Replace a device having operating
errors with another device.
• Set the no-response timeout period to
match the network structure and traffic
conditions. Or disable the timeout
function.
• If operation returns to normal, then the
Ethernet unit is defective so replace it.