Rockwell Automation RELIANCE ELECTRIC SP500 - Page 74

F-02 Deceleration Time (continued)
If the frequency requested from the keypad (using the @™ and “W keys) is less
than the maximum speed setting, the time to ramp to that frequency will be
proportionally less than the actual rate setting. For example, if F-04 = 60Hz and F-02
=
4 seconds, it will take 2 seconds to ramp to a frequency reference of 0Hz from
30 Hz.
Note that if the deceleration rate is set too fast, a high bus fault may occur (HU will be
displayed)
F-03 Minimum Speed
This parameter limits
the speed reference to
the drive. Regardless
of what speed
reference is supplied,
the
regulator will not
command a speed
less than the value in
F-03.
Parameter Range: 0.5 to 30 Hz
Default Setting: 5.0 Hz
Step Size: 0.10 Hz if F-04 < 100 Hz
0.25 Hz if F-04 = 100 Hz
ATTENTION: The SP500 drive is intended to operate the motor ata
predetermined minimum speed unless disconnected from the power
source. The user is responsible for assuring safe conditions for operating
personnel by providing suitable guards, aucible or visual alarms, or other
devices to indicate that the drive is operating at minimum speed, (possibly
zero speed), or the user must verify that the motor output shaft will rotate
at all combinations of load and output speed required by the application.
F-04 Maximum Speed
This parameter limits
the speed reference to
the drive. Regardless
of what speed
reference is supplied,
the regulator will not
command a speed
greater than the value
in F-04.
Parameter Range: 30 to 240 Hz
Default Setting: 60 Hz
Step Size: 0.10 Hz if F-04 < 100 Hz
0.25 Hz if F-04 = 100 Hz
ATTENTION: The user is responsible for ensuring that driven machinery,
all drive-train mechanisms, and process line material are capable of safe
operation at maximum speed (F-04). Failure to observe this precaution
could result in bodily injury.
8-6
SP500 AC Drive Installation and Operation Manual Version 3.1