Big Joe CB33 Manual page 36

Error Message
Code Error Text
244 GAIN EEPROM
KO
246 MICRO SLAVE
KO
247 CAN BUS KO
248 S.P OUT OF
RANGE
4-18
Table 4-3 STEERING CONTROLLER - Continued
Possible Cause
The parameters to compensate
for the gain of the current
amplifiers (ADJUSTMENT #03
and ADJUSTMENT #04 are
recorded in a not volatile mem-
ory (eeprom) with a redundant
handling. In fact every adjust-
ment is recorded in three
eeprom locations. If the values
in these thee location are dif-
ferent, this alarm occurs.
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 if
the main uC is detecting no
steering limitation meanwhile
the slave uC is detecting a
steering limitation.
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.
This alarm occurs for a fault on
the command potentiometer
(CPOC2on CNA#8). When a
single command pot is chosen,
the alarm occurs if the 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) exists the range from
4.5 Vdc to 5.5 Vdc.
Fault Elimination
It is necessary to send the controller to Zapi to
execute the maximum current regulation.
It is necessary to replace the controller.
Check the CAN Bus communication system
and analyse the frames from the traction
controller to the steer controllers.
Check the connections of the potentiometer.
This alarm occurs when one connection of
the command potentiometer is broken.
BL-CB33-0115 - 03-01-2018