41
Forward and
backward
signals exist
at the same
time(adhesion
of direction
switch )
The machine will keep on detecting. But when there are
signals requesting operation from two directions at the
same time, alarm is given. Possible causes:
(1) The wire is damaged.
(2) Direction switch fault.
(3)Improper operation.
(4) Change the controller if the trouble still can not be
eliminated.
The controller detects the great difference between two
consecutive speed readings of encoder. As the encoder in
the system can not change great speed within very short
time, so, the encoder may have the trouble (the circuits of
one or two encoders are destroyed or broken). Check the
mechanical and circuit function of the encoder. The alarm
is possibly caused by the electromagnetic noise on the
bearing of sensor. If not, change the controller.
Programming
error of
accelerator
If “2.5 POT” is set as “ON”, controller will check the
max. and min values of potentiometer recorded during
programming. If the min. value of forward is smaller than
the max. value of backward or the min. value of backward
is bigger than the max. value of forward, the fault will
appear. Check if the potentiometer is correct, or make a
data acquisition again.
In CAN communication network, a controller receives a
signal that the other controller can not make normal
communication and the controller always is always in the
waiting state until CAN communication network is
completely normal. Check why the wiring of the modules
that fails to communicate is abnormal and see if the
software edition or parameter setting is correct.
During startup, watchdog circuit is activated before
software is started. The watchdog signal is invalid in
standby or operation state( alarm state)
Fault analysis：Hardware circuit of watchdog or output of
micro-controller is damaged. The above two cases have
nothing to do with external parts, so change the controller.
Short circuit
of auxiliary
coil
When the electromagnetic brake connecting to the output
terminal of CNA#18IS or auxiliary coil is shorted, the
fault signal is produced. Withdraw from the fault state
through releasing brake after eliminating the overload
condition so that the running request is valid.
Fault analysis：Generally, the fault code indicates that the
trouble is on the harness or loading coil. So check the
connection between controller output and load first. If
there is no trouble of external load, the trouble is inside
the controller and the controller needs to be changed.
Cause：During startup, the watchdog circuit is activated
before software is started. The watchdog signal is invalid
(alarm state)in case of standby or operation state.
Fault analysis: The hardware circuit of watchdog or
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