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2-6
SP600 AC Drive User Manual
2.3.5 Multiple Stop Methods
There are several stop methods that can be selected using drive
parameters 155 and 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
parameters 161 to 163 for more information about this feature.
2.3.6 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 percentage.
The Speed Mode parameter (80) selects the speed regulation
method for the drive, and can be set to one of 3 choices
•
Open Loop - No speed control is offered
•
Slip Comp - Slip Compensation is active
•
Process PI - The PI loop sets the actual speed based on process
variables.
Refer to parameter 80 in chapter 11 for more information.
2.3.7 Auto/Manual Reference Selection
You can override the selected “auto” reference by either toggling a
function key on the OIM or asserting a digital input (Digital In”x” Sel
(361 to 366)) that has been configured for Manual. This provides a
source for local speed reference control even if a process input
signal is the primary speed reference source.
Refer to the parameter descriptions in chapter 11 for more
information.
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Summary of Contents for Reliance electric 6SB401 Series
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