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6-88
D
DC Injection Activate (Setting: 60)
OFF
Normal operation
ON
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.
Output frequency
Run command
DC braking command
E1-09 Min. output frequency
b2-01 Excitation level
ON
ON
OFF
OFF
DC braking
DC braking
D
External Search 1 (Settings: 61)
OFF
Normal operation
ON
Starts a speed search from the maximum frequency.
D
External Search 2 (Settings: 62)
OFF
Normal operation
ON
Starts a speed search from the set frequency (the present reference frequency).
The speed search function applies a lower voltage than normal, and finds the speed at the current flow-
ing at that time. The speed search is determined to be completed when the frequency is lowered from
the maximum frequency (or a set frequency) and the current that is output falls below a fixed value.
When the speed search is completed, the speed is accelerated to the frequency reference according to
the acceleration time that has been set. For V/f with PG or flux vector control, detection occurs at the
motor speed with PG feedback, so there is no need to set this function.
•
The speed search function can be used to operate the motor without tripping when switching opera-
tion 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.
Advanced Operation
Chapter 6
Summary of Contents for SYSDRIVE 3G3FV
Page 1: ...USER S MANUAL High function General purpose Inverter SYSDRIVE 3G3FV Cat No I516 E1 4 ...
Page 16: ...Chapter 1 Introduction 1 1 Function 1 2 Nomenclature 1 3 New Functions 1 ...
Page 33: ...Chapter 2 Installation 2 1 Mounting 2 2 Wiring 2 ...
Page 112: ...Chapter 4 Trial Operation 4 1 Procedure 4 2 Operation Example 4 ...
Page 289: ...Chapter 7 Parameter Lists 7 1 Initialize Mode Parameters 7 2 Program Mode Parameter List 7 ...
Page 366: ...Chapter 9 Specifications 9 1 Inverter Specifications 9 2 Option Specifications 9 ...
Page 395: ...Chapter 10 Appendix 10 1 Notes on Using the Inverter for a Motor 10 ...