Hitachi Hidic EH-150 EH-OLNK Applications Manual page 31

(7) Transmission error (CRC error, overrun)
YES
Is the cable correctly connected?
Is the cable firmly secured in place?
within the specification range?
Replace the module with a spare one,
if available.
Notify your local authorized distributor
of it.
ERR LED
Flicker at 1 sec intervals
Run a loop-back check
(refer to section 7.3.)
Has an error occurred
in the loop-back check?
NO
Does it happen frequently?
YES
YES
YES
Is there a noise source
nearby the transmission cable
or unit?
NO
Is an optical cable
YES
Does the loss of
the optical cable satisfy a
standard? *
YES
6-7
Chapter 6. Errors and error recovery
- Error information of each station : bit14 ON
NO
It may be assumed that this is a
temporary problem caused by noise, etc.
Observe developments for a while.
NO
Reconnect the cable correctly.
NO
Separate the noise source from the cable
and unit.
YES
Secure the cable firmly in place.
NO
Use it within the specification range of
the optical cable.
NO
It expects that there is a problem in the
optical cable itself, the
installation work, and so on.
*
connector