Mitsubishi Electric FR-V500 Series Instruction Manual page 90

Page 86
2
N
Is torque control
exercised?
Y
N
Is the torque
command input?
Apply a voltage to the
Y
analog input terminals
(across 3-5).
Y Have you set the
speed limit?
N
(Setting from PU or parameter)
Is an external
N
command used
for speed limit?
Enter the speed limit
Y
value from the PU or set
the parameters
(Pr. 805 to Pr. 807).
N
Is an analog
input used?
Turn on the multiple
Y
speed (*RH, RM, RL,
REX).
Apply a voltage to the
*The terminal functions
analog input terminals
vary with input terminal
(*across 2-5).
assignment (Pr. 180 to
Also, to calibrate the
Pr. 183, Pr. 187).
terminal 2, adjust
the bias and gain of
the analog voltage using
Pr. 902 and Pr. 903.
*Terminal 1 depending
on the setting of Pr. 73,
Pr. 868 or Pr. 805
Set "20" (V/F control) in Pr. 800 and
operate in V/F control.
(For trouble shooting in V/F control,
refer to page 88.)
Have you checked
the data of speed
control 1?
Y
Is the position
command given?
Y
What is used to
give the position
command?
Pulse train
N
Is a pulse input?
Y
Check the position
control signal.
Check the cable
connection.
Is the servo-on signal (LX
signal) on for position control
(pulse train, parameter)?
Y
Is the load small?
Y
The possible cause
is a motor fault.
87
Troubleshooting
N
Page 86
1
N
Turn on forward rotation
command (STF) or reverse
rotation command (STR).
Parameter
Has the position
N
command been
input to the parameter?
Y
Set the position
command
(Pr. 465 to Pr. 494).
N
Turn on servo-on (LX signal).
N
The load is excessive,
resulting in a motor
lock status.
Lighten the load or
increase the motor and
inverter capacities.
6