8-14
SP500 AC Drive Installation and Operation Manual Version 3.1
When F-20 = ON, parameter values can be displayed but cannot be modified (except
F-20). Entering the factory-set password number (257) toggles the state of the
lockout. Refer to section 8.2, Ensuring Program Security for this procedure.
Important: There is no visual indication of the status of this feature. You must access
F-20 to verify its current value (ON or OFF).
.
The avoidance band can help alleviate problems with vibrations/harmonics at a
specific operating frequency of the driven motor or machinery. Refer to the F-22
parameter description for more information.
.
This parameter is used with parameter F-21 (Avoidance Frequency). The drive can
accelerate and decelerate through the avoidance band. However, it cannot operate at
a steady state at any of the avoidance band frequencies. Setting F-22 to 0 disables
the avoidance frequency.
F-20 Password Lockout Enable
This parameter
enables or disables
parameter password
protection.
Parameter Range:
Default Setting:
Step Size:
OFF = Password lockout disabled (parameters can be
modified)
ON = Password lockout enabled (parameters cannot be
modified)
OFF
N/A
!
ATTENTION:It is the user’s responsibility to determine how to distribute
the password. Reliance Electric is not responsible for unauthorized
access violations within the user’s organization.
F-21 Avoidance Frequency
This parameter
specifies the midpoint
of the avoidance band
selected in F-22.
Parameter Range:
Default Setting:
Step Size:
Minimum speed to maximum speed (Hz)
5.0
0.10 Hz
F-22 Avoidance Bandwidth
This parameter sets
the avoidance
bandwidth. Any
frequency that falls
within the avoidance
band results in a
generated frequency
below the bandwidth
Parameter Range:
Default Setting:
Step Size:
0 to 30 Hz (0 = avoidance frequency disabled)
0
0.10 Hz
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