,
-
.__ .
..
-
.
,
.
-
-
.~.
--._
---.
24.
TROUBLESHOOTING
24.2
Troubles
and
Check
Points
Troubl8
Wotor does not start.
Wotor rotates in the
>pposite direction.
9ctual motor
speed
jiers from the
set
speed excessively.
Wotor acceleration or
kceleration
IS
not
smooth.
Wotor
speed
vanes
bring rotation.
Wotor current is too
arge.
Chock
point.
1)
Check the main circuit.
Is
power supplied?
(Is
the POWER indicating lamp
la?)
Is
the motor connected conecty,
Is
the start signal inpcd?
Are both
the
forward and reverse rotation signals input?
-
Is
the frequency set signal zero?
*
Is
the circuit across terminals AU and
SD
closed
(ON)
when
the
Is
the output
slop
signal
(across terminals
MRS
and
SD)
or the reset
2)
Check the mpuf signals.
frequency setting signal
is
in
the
range from
4
to
2OmA?
signal (across terminak RES and
SD)
ON?
3)
Check the values set for parameters.
Is
the reverse rotation prevention (Pr.78) function set?
Is
the setting
for
the reverse mode (Pr.79) cored?
Are the setting for the bias and gain (Pr.902
to
Pr.905) correct?
Is
the setting for the start frequency (Pr.13) larger than the operation
lrequency?
Is
the frequency setting for the operation functions (mutlipie-speed
operation, etc.) correct?
Is
the setting for the upper
limil
frequency (Pr.1) zero?
Is
the motor start constrained?
*
Is
the load too heavy?
*
Has the emergency
stop
status been estableshed by pressing the
4)
Check the load.
5)
Others
parameter unit stop key?
(Is
'E
V
disprayed
7)
Is
the alarm indicating lamp
(ALARM)-Ii?
Is
the phase sequence
(U,
V.
W) at
the
output
terminals correct?
Are the start sgnals (forward, reverse) connected
correctly?
Is
the frequency setting signal correct? (Measure the input signal level.)
Are Ihe values set for the following parameters correct? Pr.1 (upper limit
frequency), Pr.38 (frequency at
5
VDC input), Pr.39 (frequency at 20mA
input), Pr.902 to Pr.905 (bias and gain)
wires,
11
influenced.)
Is
acceleration or deceleration time
too
short?
Is
the load too heavy?
Is
the stall prevention function activated due to excessivdv larae value
Are the input signal lines influenced by external noise?
(use
shielded
set for torque boost?
Is
the load changing?
-
1s
the frequency setting signal stable?
Is
the load
too
heavy?
Is
the value set for torque boost (manual)
too
large?
.-
-
105
-
To Next Page
Loading...
