Parameter descriptions
WARNING
If a negative reference value is set, the drive is decelerated with command "Frequency
motorpoti up". The reference value is changed in positive direction.
Limit
The reference values are limited via the parameters
Minimum Frequency 418 and Maximum Fre-
quency
419.
Direction of rotation reversal
If parameter
Minimum Frequency 418 is set to zero, the direction of rotation of the drive can be re-
versed via the motorpoti function.
“Motorpotentiometer via digital inputs” as reference value
The function “Motorpotentiometer via digital inputs” can be selected via the following parameters:
−
Reference Frequency Source 1 475
−
Reference Frequency Source 2 492
See chapter 7.5.1 "Reference frequency channel".
Frequency setting using the motorpoti function can be used for adjustable varying speed or for speed
control. In the case of a torque control (Parameter
n-/T-Control Change-Over 164), this function is
switched off and a percentage setting option via the motorpoti function is available.
Chapter 7.6.6.1 “List of control signals” contains a table summarizing the available signal sources for
parameters
Frequency Motorpoti Up 62 and Frequency Motorpoti Down 63.
Addition of reference values
If the reference value of the motorpoti function is added to another reference value, (via
Reference
Frequency Source 1
475 plus Reference Frequency Source 2 492):
− If the value of
Maximum Frequency 419 is reached and the other reference value is increased, the
output value of the motorpoti function is reduced. It is reduced, so that the sum of both reference
values is equal to the maximum frequency.
− If the value of
Minimum Frequency 418 is reached and the other reference value is reduced, the
output value of the motorpoti function is increased. It is increased, so that the sum of both refer-
ence values is equal to the minimum frequency.
− In the settings for
Operation Mode 493 = "1 - (+/-reference value)" or "3 - inverted", the point of
reversal of direction of rotation can be shifted by the output value of the motorpoti function. The
drive changes its direction of rotation if the total of the two reference values changes the sign.
7.5.3.3.2 Control via reference percentage channel
72 Percent Motorpoti Up
73 Percent Motorpoti Down
The reference percentage can be set via digital control signals.
Via digital control inputs, the function "Motorpoti up" or "Motorpoti down" is triggered. Parameters
Percent Motorpoti Up 72 or Percent Motorpoti Down 73 must be assigned logic signals or digital
inputs.
− Command "Up": The reference percentage increases at the set value of
Ramp Percentage-
Motorpoti
509.
− Command "Down": The reference percentage decreases at the set value of
Ramp Percentage-
Motorpoti
509.
158
Operating Instructions
Agile
06/2013 Reference Values
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