EP Equipment 508000003143, Operation Manual

Page: 90 / 91

83
Error Message
Possible cause Fault elimination
Error
Error text
244
GAIN
EEPROM
KO
The parameters to compensate for the gain of
the current amplifiers (ADJUSTMENT #03
and ADJUSTMENT #04) are recorded in a
not volatile memory (eeprom) with a
redundant handling. In fact every adjustment
is recorded in three eeprom locations. If the
values in these three locations are different in
between this alarm occurs.
It is necessary to send the controller
to Zapi to execute the maximum
current regulation.
246
MICRO
SLAVE KO
In stepper motor application, this alarm
occurs if the main uC is detecting a direction
of the stepper motor not matched with the one
that the slave uC is detecting. In closed loop
application, this alarm occurs if the main uC is
detecting a direction of the steering error not
matched with the one that the slave uC is
detecting. Furthermore, this alarm occurs
also if the main uC is detecting no steering
limitation meanwhile the slave uC is detecting
e steering limitation.
It is necessary to replace the
controller.
247
CAN BUS
KO
This alarm occurs only when the setting CAN
BUS is PRESENT. Then the eps-ac0 must
receive the event messages from the traction
controller. If these messages lack more than
about 1 sec, this alarm occurs.
Check the CAN Bus communication
system and analyse the frames from
the traction controller to the steer
controllers.
248
S.P OUT
OF RANGE
This alarm occurs for a fault on the command
potentiometer (CPOC1 on CNA#9, CPOC2
on CNA#8). When a single command pot is
chosen, the alarm occurs if its wiper (CPOC1)
exits the range from 0.8 Vdc to 4.2 Vdc.
When the twin pot is chosen, the alarm
occurs if the sum of the two wiper voltages
(CPOC1+CPOC2) exits the range from 4.5
Vdc to 5.5 Vdc.
Check the connections of the
potentiometer. This alarm occurs
when one connection of the
command potentiometer is broken.