Danfoss 176F7300 Manual page 46

In the following examples the output frequency and direction of motion is controlled by a
potentiometer connected to the external terminals or the potentiometer in the Digital
Keypad/Display. Observe the interaction and effect of parameters: Pr.48, 49, 50, 51 on
the potentiometer operation.
Example 1: The configuration in this example is the most common. Set Pr.00 to d00,
d01 or d02 and select J5, J6, J7 jumper settings to control the output frequency:
through potentiometer in the Digital Keypad/Display, or through the external AV1: 0-10 V,
4-20 mA.
Max. operation Freq.
P03 60Hz
Factory Setting Value
P03 = 60Hz
30Hz
P48 = 0Hz
P49 = 0
P50 = 100%
P51 = 0
0Hz
Example 2: In this example the output frequency range is 10 Hz to 60 Hz. Turning the
potentiometer fully counter clockwise, corresponds to an output frequency of 10 Hz.
Turning the potentiometer fully clockwise, to the stop, corresponds to 60 Hz. The
midpoint corresponds to 40 Hz. The effective AVI signals are: 0-8.33 V or 4-13.33 mA.
Max. operation Freq.
P03 60Hz
Factory Setting Value
P03 = 60Hz
P48 = 10Hz
P49 = 0
10Hz
P50 = 100%
P51 = 0
P48 = 10Hz
0Hz
Example 3: In this example the Process Signal Gain (Pr.50) is d83%. The control range
of the potentiometer is 10 - 60 hz as shown below. The corresponding range on the
external AVI terminals is: 0-10 V and 4-20 mA.
Max. operation Freq.
P03 60Hz
Factory Setting Value
P03 = 60Hz
P48 = 10Hz
P49 = 0
10Hz
P50 = 83%
P51 = 0
P48 = 10Hz
0Hz
Calculated method of gain value
P48
P50 = (1 – ) x 100%
P03
0V 5V 10V
4mA 12mA 20mA
0V 10V
4mA 20mA
0V 10V
4mA 20mA
44
VLT ® MICRO
30
0 60
Hz
0V 10V
30
It's 60Hz
0 60
Hz within this
0V 10V range
30
0 60
Hz
0V 10V