YASKAWA UAK series User Manual page 285

Alarm:
Alarm Name
The same local bus address is set
twice.
The local bus cable of the power
regeneration converter is either
A.EEB:
disconnected or a has a contact
Converter Local Bus
fault.
Communications Error
(A communications
error occurred in the
Malfunction caused by noise
power regeneration con-
verter local bus.)
The terminator circuit inside the
power regeneration converter has
failed.
The local bus cable is either dis-
connected or has a contact fault.
Malfunction caused by noise
A.EF0:
Local Bus Connection
The local bus terminator is not
Error
installed.
(An error occurred in the
local bus connection.)
Terminator circuit failure
Malfunction caused by noise
A.EF2:
Local Bus Drive WD The local bus terminator is not
Error installed.
(A local bus watchdog
alarm occurred in the
SERVOPACK.)
Terminator circuit failure
A.EF4:
Local Bus
Communications Error An error occurred during local
bus communications.
(An error occurred dur-
ing the local bus com-
munications.)
Cause Investigative Actions
Check to see if the same value is set
for the rightmost digit of Pn010
(5C00h) for more than one SERVO-
PACK.
Check the local bus cable.
Improve the noise environment,
including the wiring and installa-
tion, and check to see if the alarm
occurs again.
−
Check the local bus cable.
Improve the noise environment,
including the wiring and installa-
tion, and check to see if the alarm
occurs again.
Make sure the local bus terminator
is installed at the terminal SERVO-
PACK.
−
Improve the noise environment,
including the wiring and installa-
tion, and check to see if the alarm
occurs again.
Make sure the local bus terminator
is installed at the terminal SERVO-
PACK.
−
Check the insertion of connector of
the local bus cable and the cable
wiring.
11.2 Alarm Displays
(cont'd)
Corrective Actions
Set the rightmost digit of Pn010
(5C00h) to a unique value for each
SERVOPACK.
Either re-install the local bus cable
or replace it.
Install the local bus cable away
from the peripheral equipment, or
replace it with a cable that has a fer-
rite core.
Turn the power supply OFF and
then ON again. If the alarm still
occurs, the power regeneration con-
verter may be faulty. Replace the
power regeneration converter.
Either re-install the local bus cable
or replace it.
Install the local bus cable away
from the peripheral equipment, or
replace it with a cable that has a fer-
rite core.
Install the terminator.
Turn the power supply OFF and
then ON again. If the alarm still
occurs, the power regeneration con-
verter or the terminator may be
faulty. Replace the power regenera-
tion converter or the terminator.
Install the local bus cable away
from the peripheral equipment, or
replace it with a cable that has a fer-
rite core.
Install the terminator.
Turn the power supply OFF and
then ON again. If the alarm still
occurs, the power regeneration con-
verter or the terminator may be
faulty. Replace the power regenera-
tion converter or the terminator.
The local bus cable may be faulty.
Replace the local bus cable.
The SERVOPACK may be faulty.
Replace the SERVOPACK.
1 1
11-31