Mitsubishi Electronics FR-V500 Troubleshooting Torque control is not exercised normally

Troubleshooting

6.4.8Torque 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?

N

Select torque control in control mode selection (Pr. 800).

N

Check the wiring and perform correct wiring.

N

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?

Set the motor in motor setting (Pr. 71).

N

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

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

Is an analog input used?

Y

Calibrate the speed setting bias/gain

No. 2 terminal (Pr. 902, Pr. 903).

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Set speed restriction in the parameters (Pr. 805 to Pr. 807).

N

	Is the corresponding	N
	multi-speed signal
	(RH, RM, RL, REX) on?
	Y	Turn on the multi-speed
		signal (RH, RM, RL, REX).
Check the multi-speed settings
(Pr. 4 to 6, 24 to 27, 232 to 239).

91