Big Joe CB33 Manual page 35

Error Message
Code Error Text
238 EPS NOT
ALIGNED
239 WAITING FOR
TRAC
241 ENCODER
ERROR
242 Q LINE SENSOR
KO
243 D LINE SEN-
SOR KO
245 DATA ACQUISI-
TION
BL-CB33-0115 - 03-01-2018
Table 4-3 STEERING CONTROLLER - Continued
Possible Cause
This is a real alarm that cuts off
the traction. It occurs at the ini-
tial alignment if the straight-
ahead condition is not matched
within 6 sec. Throughout the 6
sec delay, steering is not acti-
vated, the safety relays are
open and the traction is
stopped.
At key-on the EPS-AC0 needs an
assent from the traction con-
troller to close the safety con-
tacts and to turn on the
operational mode. Until this
happens, this warning occurs.
The steer is not activated and
the safety relays remain open
when this warning is present.
It occurs when ENCODER CON-
TROL is set ON and the real
frequency does not pursuit the
commanded frequency.
This alarm occurs when the mean
voltage of the Quadrature line
of the stepper motor (connec-
tion CNA#8) is not null: the
voltage on every stepper motor
line is a sine wave with null
mean voltage.
This alarm occurs when the mean
voltage of 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.
This alarm occurs when acquir-
ing the motor resistance or
when adjusting the parame-
ters to compensate for the gain
of the current amplifiers (maxi-
mum current factory adjusted).
Fault Elimination
This condition is several times due to either, a
mismatching between the Encoder resolu-
tion used in the SW and the real encoder
resolution, or a wrong connection between
the two encoder channels. In this latest
case, exchange the connections.
Check the continuity of the stepper motor con-
nections. In particular the resistance
between CNA#8 and the negative battery
(with the stepper motor at rest) is expected
to be very low (close to 30 ohms).
Check the continuity of trhe stepper motor
connections. In particular the resistance
between CNA#9 and the negative battery
(with the stepper motor at rest) is expected
to be very low (close to 30 ohms).
Recycle the key.
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