Mitsubishi Electronics FR-V500 Troubleshooting Motor rotates but speed does not change

Troubleshooting

6.4.7Motor rotates but speed does not change

(1) Speed control

The motor rotates but speed does not change.

Is the maximum speed (Pr. 1) lower than the speed setting?

Y

Is the speed setting method an external command?

Y

Is the speed setting an analog command?

N

Change the maximum speed (Pr. 1) or speed setting to match the specifications.

N

	Have you changed the		Y
	speed command from
	the PU?
N		N
	Set the speed.

Y

		Is the multi-speed terminal
Does the voltage of the	N	on (changed)?
speed setting signal
(across 2-5) change?

N

Speed setting

Y potentiometer fault Open cable between setting potentiometer and terminal

	N
Is the multi-speed
terminal off?
	Turn off the multi-
Y	speed command.

Y

Have you input the speed data to multiple speeds (Pr. 4 to Pr. 6, Pr. 24 to Pr. 27, Pr. 232 to Pr. 239)?

N

Input speeds to the corresponding parameters.

Turn on the multi-speed terminal (change the ON of the terminal.)

Y

FUNCTIONS

	N
Is the torque restriction
function deactivated?

Change the torque

Y restriction level to match the specifications.

Is the acceleration/	N
deceleration time
adequate (not too long)?

Rewrite the parameter Y (Pr. 7, Pr. 8) value to

match the specifications.

Please contact your sales representative.

ERRORS AND PROTECTIVE

6

90