Table of Contents
Advertisement
Troubleshooting
Trouble
The motor does not
operate when an
external operation
signal is input.
The motor stops. The
torque is not output.
204
Cause
The operation method selection
is wrong.
The RUN command (n003) is not set
to Control Circuit Terminal.
A 3-wire sequence is in effect.
The Multi-function Input Selection
(n052) is set to 3-wire sequence, and
the S2 control terminal is not closed.
The frequency reference is too
low.
The input frequency reference is lower
than the setting for the Min.Output
Frequency (n016).
Local mode is in effect.
The V-I SW (SW2) setting is
wrong.
Example: The reference 4 to 20 mA is
input, but SW2 is set to "V."
The setting of NPN/PNP switch
(SW1) is not correct.
Program mode is enabled.
The stall prevention level during
acceleration is too low.
Because the Stall Prevention Level
during Acceleration (n093) is set too
low, the output current reaches the set
level, the output frequency is stopped,
and the acceleration time is
lengthened.
The stall prevention level during
running is too low.
Because the Stall Prevention Level
during Running (n094) is set too low,
the output current reaches the set
level, and the speed drops.
The load is too heavy.
If the load is too heavy, stall prevention
is activated, the output frequency is
stopped, and the acceleration time is
lengthened.
When the maximum frequency
(n011) was changed, the maxi-
mum voltage frequency (n013)
was also changed.
The V/f set value is too low.
Corrective Actions
Set the RUN command (n003) to
Control Circuit Terminal.
To use a 3-wire sequence, make the
wiring so that the S2 control terminal
is closed. To use a 2-wire sequence,
set the Multi-function Input (n052) to a
value other than 3-wire sequence.
Input a frequency reference greater
than the Min. Output Frequency
(n016).
Set the LO/RE selection of the Digital
Operator to RE.
For analog input, make sure that the
Frequency Reference (n004) and SW2
settings are correct.
Set SW1 correctly.
Press
to make
DSPL
and change to Drive mode.
Check if the Stall Prevention Level
during Acceleration (n093) is set to an
appropriate value.
Check if the Stall Prevention Level
during Running (n094) is set to an
appropriate value.
•
Lengthen the set acceleration time
(n019).
•
Reduce the load.
To increase the speed of a general-
purpose motor, only change the
maximum frequency (n011).
Set the V/f (n011 to n017) according to
the load characteristics.
flash
FREF
Advertisement
Table of Contents
