EP Equipment CQD16, Service Manual

Page: 158 / 251

REV. 07/2016
ELECTRICAL SYSYTEM
8
144
Error Message
Possible cause Fault elimination
Error Error text
242 Q LINE SENSOR KO
This alarm occurs when the mean
voltage on the Quadrature line
of the stepper motor (connection
CNA#8) is not null: the voltage on
every stepper motor line is a sine
wave with null mean voltage.
Check the continuity of the
stepper motor connections.
In particular the resistance
between CNA#8 and the
minus battery (with the
stepper motor at rest) is
expected being very low
(close to 30 ohms).
243 D LINE SENSOR KO
This alarm occurs when the mean
voltage on the Direct line of the
stepper motor (connection CNA#9)
is not null: the voltage on every
stepper motor line is a sine wave
with null mean voltage.
Check the continuity of the
stepper motor connections.
In particular the resistance
between CNA#9 and the
minus battery (with the
stepper motor at rest) is
expected being very low
(close to 30 ohms).
245 DATA ACQUISITION
T h i s a l a r m o c c u r s w h e n t h e
acquiring the motor resistance or
when adjusting the parameters
to compensate for the gain of
the current amplifiers (maximum
current factory adjusted).
Recycle the key.
244 GAIN EEPROM KO
The parameters to compensate
f o r t h e g a i n o f t h e c u r r e n t
ampli
fi ers (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
t h e m a x i m u m c u r r e n t
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.