Troubleshooting
6.4.8
Torque control is not exercised normally
(1) Torque control
Torque control is not
exercised normally.
Is torque control selected
in control mode selection
(Pr. 800)?
Y
Is the phase sequence
of the motor wiring correct?
Y
Have you set the
motor type?
Y
Is the vector inverter motor
(SF-V5R, SF-VR), standard
motor with PLG (SF-JR) or
constant-torque motor with
PLG (SF-HRCA) used?
Y
Is the wiring length
short?
Y
Is the phase sequence
of the PLG correct?
Y
Have you set the number
of PLG pulses (Pr. 851)
and is it correct?
Y
Does the voltage of the
torque command signal
(across 3-5) change?
Y
Does the torque command
value match the inverter-
recognized value?
Y
Have you set the speed
restriction level and is
that value correct?
Y
1
Page 92
N
Select torque control
in control mode
selection (Pr. 800).
N
Check the wiring and
perform correct wiring.
N
Set the motor in
motor setting (Pr. 71).
N
N
Perform offline auto tuning (Pr. 71, Pr. 80, Pr. 81, Pr. 83, Pr. 84, Pr. 96)
or enter the motor constants (Pr. 90 to Pr. 94).
N
Perform correct
wiring.
N
Set the number of
PLG pulses
(Pr. 851).
N
Speed setting potentiometer fault
Open cable between the setting
potentiometer and terminal
N
Calibrate the torque command
bias/gain No. 3 terminal
(Pr. 904, Pr. 905).
N
N
Is an external
command used?
Y
N
Is an analog
input used?
Y
Calibrate the speed
setting bias/gain
No. 2 terminal
(Pr. 902, Pr. 903).
Check the multi-speed settings
(Pr. 4 to 6, 24 to 27, 232 to 239).
Set speed restriction in the parameters
(Pr. 805 to Pr. 807).
Is the corresponding
N
multi-speed signal
(RH, RM, RL, REX) on?
Turn on the multi-speed
Y
signal (RH, RM, RL, REX).
91