319
Troubleshooting Section 11-3
The Board/
Unit cannot
convert the
received (via
CPU bus)
FINS com-
mand into
either of the
protocols.
The serial com-
munications
mode is set to
Serial Gateway
or protocol
macro mode.
The SD@/
RD@ and
COM@ indi-
cators do not
flash at all.
(Communica-
tions have
not been
electrically
established.)
0205 hex
(response
timeout), etc.
--- A hardware
error has
occurred.
Conduct a loopback test
in serial communications
mode to check the trans-
mission lines. If an error
occurs during the test,
replace the Board or
Unit.
The SD@ and
COM@ indi-
cators do not
flash.
0202 hex (no
Unit)
or
0401 hex
(undefined
command)
--- The FINS
destination
address is
not specified
correctly.
Correct the FINS desti-
nation address specifica-
tion, and then resend the
FINS message. (Refer
particularly to 6-7 Condi-
tions Requiring Routing
Tables.)
The serial com-
munications
mode is set to
Serial Gateway
or protocol
macro mode
The SD@ and
COM@ indi-
cators do not
flash at all.
2605 hex
(service exe-
cuting)
--- The serial
port received
a sixth FINS
command
when five
FINS com-
mands are
already wait-
ing.
Include retry processing
at the FINS command
transmission source for
when the FINS response
code 2605 hex is
received.
Error conditions Cause Remedy
Board/Unit
status
Serial commu-
nications mode
Indicator
display
FINS end
code sent to
FINS trans-
mission
source
Words allo-
cated in CIO
Area
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