Big Joe J1-192 Maintenance Repair Parts Manual page 31

Table 3-4 Troubleshooting Chart (EPS-AC0 Controller) - Continued
ERROR ERROR TEXT
218 CLOCK PAL NOT OK
99 INPUT ERROR #1
212 MICRO SLAVE #8
219 STEPER MOTORE
MISM
220 MOTOR LOCKED
221 MICRO SLAVE #4
BL-J1-192-0315 - 11-19-2019
POSSIBLE CAUSE
The main uC send an analog signal
towards the salve uC to reset the slave
uC on demand. When the slave uC
detects this analog signal external to a
window from 2.2 to 2.8 and not in the
range to generate the reset on
demand, the slave uC raises this
alarm.
This alarm occurs when the voltage on
CNA#4 (lower potential terminal of the
safety contacts) is higher than 12V.
This alarm occurs when the encoder
counting of the main uC is not matched
with the encoder counting of the slave
uC.
This alarm occurs if the frequency and
the amplitude of the voltages from the
stepper motor lines are mismatched. In
normal condition when the amplitude
of the stepper motor lines increase, the
frequency of the stepper motor lines
must increase too.
This alarm occurs if the current in the
steer motor stays close to the maxi-
mum current longer than 1 sec.
This alarm occurs in one of the follow-
ing:
(Open loop application only) If the slave
uC detects the stator voltage phasor
rotates in the opposite direction
respect to the sign of the stepper motor
speed.
(Closed loop application only) if the
slave uC detects the stator voltage
phasor rotates in the opposite direction
respect to the commanded position.
FAULT CLEARANCE
Replace the controller.
When the safety contacts are open, the
voltage on CNA#4 is expected to be
close to 0 Vdc. Only a harness mistake
may connect NK1 to a higher than
12 V.
Replace the controller.
Replace the controller.
Search for a mechanical problem lock-
ing the motor. To make easier fault
detecting, set DEBUG OUTPUT to
level 11.
Replace the controller.
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