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