User Manual

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.