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Troubleshooting

Motor Does Not Run

Classification

Causes

Measures

Setup of the control
mode is not correct

Selection of torque
limit is not correct

Setup of electronic
gear is not correct.
(Position/Full-closed)

Servo-ON input of CN
X5 (SRV-ON) is open.

CW/CCW over-travel
inhibit input of CN X5
(CWTL/CCWTL) is
open.
Command pulse input
setup is incorrect.
(Position/Full-closed)

Command pulse input
inhibition (INH) of CN
X5 is open.
(Position/Full-closed)
Counter clear input
(CL) of CN X5 is
connected to COM–.
(Position/Full-closed)
Speed command is
invalid (Velocity)

Speed zero clamp
input (ZEROSPD) of
CN X5 is open.
(Velocity/Torque)
Torque command is
invalid (Torque)

Velocity control is
invalid (Torque)

Main power is shut off.

The motor shaft drags,
the motor does not
run.

1)Set up Pr02 (Setup of control mode) again.
2)Check that the input to control mode switching (C-MODE) of

the CN X5 is correct, when Pr03 is set to 3-5.

1)Set up Pr03 (Selection of torque limit) to 0 and apply -9 [V] to

CWTL and +9 [V ] to CCWTL when you use the external input.

2)Set up Pr03 (Selection of torque limit) to 1 and set up the max. value

to Pr5E (Setup of 1st torque limit) when you use the parameter value.

1)Check the setups of Pr48-4B again.
2)Connect the electronic gear switching input (DIV) of CN X5 to

COM–, or invalidate the division/multiplication switching by
setting up the same value to Pr48 and Pr49.

Check and make a wiring so as to connect the SRV-ON input to
COM–.

1)Check and make a wiring so as to connect both CWL and

CCWL inputs to COM–.

2)Set up Pr04 (Setup of over-travel inhibit input) to 1 (invalid)

and reset the power.

1)Check that the command pulses are entered correctly to the

direction selected with Pr40 (Selection of command pulse input).

2)Check that the command pulses are entered correctly in the

format selected with Pr42 (Setup of command pulse input mode).

1)Check and make a wiring so as to connect the INH input to

COM-.

2)Set up Pr43 (Invalidation of command pulse inhibition input) to

1 (invalid).

1)Check and make wiring so as to open the CL input 2)Set up

Pr4E (Counter clear input mode) to 2 (invalid).

1)Check the setups of Pr50-52 again by setting up Pr05

(Internal or external switching of speed setup) to 0, when you
use the external analog command.

2)Set up Pr53-56 and Pr74-77 by setting up Pr05 (Internal or

external switching of speed setup) to either one of 1, 2 or 3,
when you use the internal speed command.

1)Check and make wiring so as to connect speed zero clamp

input to COM–.

2)Set up Pr06 (Selection of ZEROSPD input) to 0 (invalid).

1)Check that the input voltage is applied correctly by setting up

Pr5B (Selection of torque command) to 0, when you use
SPR/TRQR input.

2)Check that the input voltage is applied correctly by setting up

Pr5B (Selection of torque command) to 1, when you use the
CCWTL/CWTL input.

1)Set up the desired value to Pr56 (Speed setup/4th speed) by

setting up Pr5B (Selection of torque command) to 0, when
you use the internal speed.

2)Check that the input voltage is applied correctly by setting up

Pr5B Selection of torque command) to 1, when you use the
SPR/TRQR/SPL input.

Check the wiring/voltage of main power of the driver (L1, L2 and
L3).

If you cannot turn the motor shaft, consult with the dealer for
repair.

Parameter

Wiring

Installation

Check that the present control
mode is correct with monitor
mode of the front panel.
Check that the external analog
input (CWTL/CCWTL) is not
used for the torque limit.

Check that the motor moves by
expected revolution against the
command pulses.

Check that the input signal No.0
or No.03 does not show "-", with
monitor mode of the front panel.
Check that the input signal
No.02 or No.03 does not show
"A", with monitor mode of the
front panel.
Check that the input pulse
counts and variation of com-
mand pulse sum does not slips,
with monitor mode of the front
panel.
Check that the input signal
No.08 does not show "A", with
monitor mode of the front panel.