How To Deal With Parameter Setting-Related Problems - Toshiba TOSVERT VF-AS3 Instruction Manual

Problems
The motor
speed fluctuates
during run.
4
Parameter set-
tings cannot be
changed.
4
The following is how to deal with parameter setting-related problems.
8
You forget parameters which
have been reset.
9
You want to return all changed
parameters to their respective
default settings.
13
13. Trip information and measures
Causes
- The load is large or small, and load fluctua-
tion is large.
- The inverter or motor used does not have a
rating large enough to drive the load.
- The frequency command fluctuates.
- Vector control is not performed properly
when <Pt: V/f Pattern> is set to "3" or "9".
- <F700: Parameter reading&writing access
lockout> is set to "1" to "4" (Locked).
- The password is set with <F738: Password
setting>.
- Input terminal functions: "200" to "203"
(Parameter writing/reading locked) are
assigned to one of the digital input terminals,
and the input terminal is ON.
- For reasons of safety, some parameters
cannot be changed during run.
Problems
- You can search for all changed parameters and set.
For details, refer to "Changed parameters search & edit <GrU>" in [4. 2. 1].
- You can return all parameters to default settings.
For details, refer to [5. 2. 9].
- Reduce the load fluctuation.
- Change the inverter and motor to large
capacity.
- Check if the frequency command such as
the analog signal changes.
- Check the settings and conditions of the
motor parameters and vector control. (Refer
to [5. 2. 4])
- Set <F700> to "0: Unlocked".
- Input the password to <F739: Password
verification> to clear. (Refer to [6. 34. 1])
- Turn off the applicable input terminal.
- Refer to [6. 34. 1].
Measures
13-16
E6582062
Measures