Chapter 8 Troubleshooting & Maintenances
8-5
(9)
Is PAR_19 [number of motor poles] properly set?
☞
check the motor nameplate and setting matches
(10)
CON_28 [Torque limit setting] is set to “ Kpd Kpd Kpd “. Is CON_29 ~ CON_31 setting correct?
☞
CON_29 ~ CON_31 marks upper limit in inverter output torque. For the application lower torque
limit is required, when torque shortage occurs, increase this value a little. STARVERT
-
iV5 ‘s overload
capacity is 180%/1 min. when using torque limit over 180%, time and the number of use should be
limited.
(11)
When CON_28[torque limit setting] Analog or Option, the corresponding input value is properly set?
☞
CON_28 is set to Analog, one of Ai1/Ai2/Ai3 should be defined as “Torque limit”. If set to Option,
refer to Option manual for proper setting.
3)
Motor speed is not increasing while it is running.
(1)
Is PAR_10 [number of Encoder pulse] set properly?
☞
factory default is 8192. If it is not LG-OTIS vector motor, contact with Encoder maker.
(2)
FUN_01 is set to “Keypad”,FUN_02 to “Keypad1”, FUN_12(Speed 0) to 100.0rpm and press [FWD]
key but motor speed is not 100.0rpm. In this case, check for encoder wiring.
☞
If encoder wiring is disconnected or switched, it rotates only uni-direction with low speed (30.0 ~
60.0rpm) and over 150% its rated current. Check the encoder wiring and whether wiring of
defined terminal and motor encoder terminal is shorted.
(3) If motor speed does not increase and keeps abnormally 1.0 ~ 4.0 rpm, stop the motor and switch the
wiring of A and B phase of Encoder. Check whether motor rotating direction is reversed as seen in (4).
☞
In the case of Line Drive type encoder, wire A+, A- phase to B+, B- and B+, B- phase to A+, A-.
Complementary / for the case of Open Collector type encoder, reverse the wiring of PA and PB.
Or switch the encoder direction in PAR 11 (Enc Dir Set) and try RUN.
4)
Motor rotates in reverse direction.
☞
Switch the wiring of output phase V and W. Switch the wiring of encoder phase A and B as
indicated in (3)
Or switch the encoder direction in PAR_11(Enc Dir Set) and try RUN.
5)
Motor rotating direction cannot be changed.
(1)
Is RUN/STOP setting proper?
☞
Check FUN_01 RUN/STOP command setting matches the actual operating mode. If FUN_01 is set
to Terminal (Keypad) but operation cannot be made, change it to Keypad (Terminal). If it does not
work, refer to (6)