Download Chapter 6 Advanced Operation

Chapter 6
Advanced Operation
DC Injection Activate (Setting: 60)
OFF
ON
Normal operation
Applies DC braking if the Inverter is stopped.
(Applies initial excitation when flux vector control is being used.)
• DC braking is used to prevent the motor from rotating due to inertia or external forces when the Inverter
is stopped.
• DC braking is performed if the DC braking input is ON while the Inverter is stopped.
• If a run command or jog command (jog frequency reference, forward jog, or reverse jog) is input, the
DC braking will be cleared and motor operation will be started.
Run command
OFF
ON
DC braking command
OFF
ON
Output frequency
DC braking
DC braking
E1-09 Min. output frequency
b2-01 Excitation level
External Search 1 (Settings: 61)
OFF
ON
Normal operation
Starts a speed search from the maximum frequency.
External Search 2 (Settings: 62)
OFF
ON
Normal operation
Starts a speed search from the set frequency (the present reference frequency).
• The speed search function can be used to operate the motor without tripping when switching operation from a commercial power supply and the Inverter or starting a coasting motor.
• The speed search will begin after the minimum baseblock time has elapsed when the run command is
input after the external search command has been turned ON.
• Either one of the external search functions can be set, but not both.
Timing Chart
Run command
OFF
ON
External search command
OFF
ON
5 ms min.
Maximum frequency
or set frequency
Deceleration time set in b3-03.
Frequency reference
that was set
Output frequency
Minimum baseblock time
6-87