User Manual Instruction Manual

About the Drive 2-7
• Custom Volts per Hertz
• Fan and Pump Volts per Hertz (Variable Torque)
• FVC Vector (Flux Vector Control with or without Encoder Feedback)
See the parameter description for Motor Cntl Sel (53) in chapter 11 for details of
operation of each control mode.
2.3.6 Auto Restart (Reset/Run)
The Auto Restart feature, enabled in Auto Rstrt Tries (174), provides the ability for the
drive to automatically perform a fault reset followed by a start attempt without user or
application intervention. This allows for automatic restart in applications where the
drive is used in remote or "unattended" operation.
Important: Only certain faults are allowed to be auto reset. Faults that indicate
possible drive malfunction are not resettable. Caution should be used
when enabling this feature, since the drive will attempt to issue its own
start command based on user-selected programming.
Refer to the descriptions of Auto Rstrt Tries (174) and Auto Restrt Delay (175) in
chapter 11 for more information about using the Auto Restart feature.
2.3.7 Multiple Stop Methods
There are several stop methods that can be selected using drive Stop Mode A (155)
and Stop Mode B (156):
• Coast to Stop
• Brake to Stop
• Ramp to Stop
• Ramp to Hold
Refer to the parameter descriptions in chapter 11 for more information about these
stop mode selections.
Another stop method, dynamic braking, uses an optional internal or external DB
braking resistor to dissipate stopping energy. See Bus Reg Mode A (161) to DB
Resistor Type (163) for more information about this feature.
2.3.8 Multiple Speed Control Methods
The purpose of speed regulation is to allow the drive to adjust to certain operating
conditions, such as load change, and compensate for these changes in an attempt to
maintain motor shaft speed within the specified regulation tolerance.
The Feedback Select parameter (80) selects the speed regulation method for the
drive, and can be set to one of 3 choices
• Open Loop - Simple frequency output - No feedback.
• Slip Comp - Slip Compensation is active.
• Encoder - Encoder present and connected to the drive.