Rockwell Automation 1333 Drive, 3/4-5HP, 230-575V Series D - Manual (Page 84)

Operation and Programming
Chapter 5
5-41
Lower and Upper
Important: The maximum allowable drive output frequency will be
Frequency Clamp Settings
determined by the lowest value programmed into the following parameters:
•
Parameter 3 Frequency Range
•
Parameter 15 Maximum Frequency
•
Parameter 51 Upper Frequency Clamp
•
Parameter 53 Bias Frequency –– If Parameter 53 is Higher Than
Parameter 54
•
Parameter 54 Gain Frequency –– If Parameter 54 is Higher Than
Parameter 53
Parameter 50 -- Lower Frequency Clamp
Units = Hertz
Range = 00.50/400.0
Factory Setting = 00.50
This parameter sets the minimum frequency or speed that the drive can be
set to by any input control signal.
From 00.50-100.0 Hz, Parameter 50 sets the Lower Frequency Clamp in
.01 Hz increments.
From 100.0-400.0 Hz, Parameter 50 sets the Lower Frequency Clamp in
0.1 Hz increments.
Important: If an external potentiometer, a 0-5V DC, a 0-10V DC or a
4-20mA frequency reference is required:
•
For directly proportional applications, enable Parameter 52 and enter a
minimum value of 00.50 for Parameter 53 if the Lower Frequency
Clamp is to set the minimum frequency.
•
For inverse follower applications, enable Parameter 52 and enter a
minimum value of 00.50 for Parameter 54 if the Lower Frequency
Clamp is to set the minimum frequency.