Yamaha ERCX Manual Do Utilizador

34

CHAPTER2  Ethernet Unit

• Check the TELNET parameter to find 

if it was set to stop operation during 
logout.

• Check the TELNET parameter to find 

if communication status is longer than 
the time set for timeout.

• Check if a cable is detached or power 

supply for the HUB or other equipment 
is off.

• Check if operating problems are 

occurring in devices such as the HUB 
due to noise, etc.

• Too short of a period was set for the 

no-response timeout period.

• Try substituting with another Ethernet 

unit.

• 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.

4

TELNET 
communication 
cuts off by itself 
without a 
LOGOUT or 
BYE command 
being issued.
TELNET 
parameter was 
set to stop 
operation during 
logout.
Communication 
status continues 
for a fixed period 
and then cuts off 
automatically at 
timeout.
No-response 
status continues 
for a fixed period 
versus the keep-
alive packet and 
then cuts off 
automatically at 
timeout.
Ethernet unit is 
defective.

1)

2)

3)

4)

5)

Program 
stops by itself 
during 
automatic 
operation.