Diagnostic & Troubleshooting 6 - 19
If the Motor Rotates Even When Drive Output is Stopped
If the motor rotates even when the Drive is stopped, the DC injection braking may be insufficient. If the motor continues
operating at low speed, without completely stopping after a stop has been executed, it means that the DC injection braking is
not decelerating the motor enough. Adjust the DC injection braking as follows:
•
Increase the parameter b2-02 (DC Injection Braking Current) setting.
•
Increase the parameter b2-04 (DC Injection Braking (initial excitation) Time at Stop) setting.
If 0 V is Detected When a Driven Fan is Started or Stalls
Generation of 0 V (main circuit voltage) and stalling can occur if a fan is turning when it is started. The DC injection braking
is insufficient when starting.
This can be prevented by slowing motor rotation by DC injection braking before starting the motor. Increase parameter b2-03
(DC injection braking time at start) setting.
If Output Frequency Does Not Rise to Speed Command
Use the following information if the output frequency does not rise to the Speed Command.
The Speed Command is within the jump frequency range.
When the jump frequency function is used, the output frequency does not change within the jump frequency range. Check to
be sure that the Jump Frequency (parameters d3-01 to d3-03) and Jump Frequency Width (parameter d3-04) settings are
suitable.
The frequency reference upper limit has been reached.
The output frequency upper limit is determined by the following formula:
Maximum Output Frequency (E1-04)
×
Frequency Reference Upper Limit (d2-01) / 100
Check to be sure that the parameter E1-04 and d2-01 settings are suitable.
Содержание E7 Drive
Страница 1: ...E7 Drive User Manual Model E7U Document Number TM E7 01...
Страница 74: ...Start Up 4 10 Notes...
Страница 132: ...Maintenance 7 8 Notes...
Страница 162: ...Parameter List A 30 Notes...
Страница 166: ...Capacity Related Parameters B 4 Notes...
Страница 184: ...Communications D 14 Notes...
Страница 192: ...Spare Parts F 4 Notes...