V/F Pattern Adjustment - Saftronics FP5 Series User Manual

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· DC Injection Braking at Start (n068, DCInj Current;
This function restarts a coasting motor after first applying it with DC
injection braking. DC injection braking time at start (n070) is set in
units of 0.1 second. DC injection braking current is set in parameter
n068 in units of 1%. When parameter n070 is set to "0", DC injection
braking is disabled and acceleration starts from the minimum output
frequency.
V/f Pattern Adjustment (n010, V/f Selection)
Set the V/f pattern using parameter n010 as described below. It may be
necessary to change the V/f pattern when using a high-speed motor, or
when special torque adjustment is required in the application.
Set values:
Set the V/f pattern according to the following:
· n010 = "60Hz Preset" (Factory default value)
Set parameter n010 to "60Hz Preset" when a standard 50/60Hz, 230/
460V motor is selected. This setting provides a standard linear V/Hz
pattern. Parameters n011 through n017 cannot be adjusted.
· n010 = "User defined V/f" (Custom V/f pattern)
Set parameter n010 to "User defined V/f" when a variable torque pat-
tern is required. Parameters n011 through n017 can then be adjusted
manually to customize a special V/f pattern. The default settings for
parameters n011 through n017 when n010 = "User defined V/f" com-
prise the standard variable torque pattern.
FP5/GP5 User's Manual
Chapter 3 - Programming Features
n070, DCInj Time@Start)
n016
Min. Output Frequency
n070
DC Injection Braking
Time at Start
Figure 45 DC Injection Braking at Starting
"60Hz Preset": Fixed V/f pattern
"User defined V/f": Custom V/f pattern can be set
FP5/GP5 Operation
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