Rockwell Automation 20D PowerFlex 700S with Phase I Control Reference Manual - Manual (Page 15)

Rockwell Automation Publication PFLEX-RM002D-EN-E - August 2013 15
Detail Drive Configuration and Operation Chapter 1
Configuration Example:
This example illustrates how to setup a speed reference to follow a 0…10V analog
input signal and null out a small amount of offset from the A/D converter on the
analog input.
• 803 [Anlg ln1 Offset] = -0.0144V
• 802 [Anlg ln1 Scale] = 0.1 per 1V
• 804 [Anlg ln1 Filt Gain] = 1
• 805 [Anlg ln1Filt BW] = 0
• 10 [Spd Ref 1] is linked to 800 [Anlg ln1 Data]
With a desired [Anlg In1 Volts] of 0V, the drive was reading 0.0144V. To null out
analog input 1, [Anlg In1 Offset] was set to -0.0144V.
[Spd Ref 1] is a per unit parameter, meaning that a value of 1 equates to base
motor RPM. Therefore, to scale [Anlg In1 Data] to give us a value from 0 to 1 for
a 0-10V signal, [Anlg In1 Scale] was set to 0.1 per 1V.
[Anlg In1 Filt BW] was set to 0 so that no filtering took place on analog input 1.
Analog Outputs Analog Output Specifications
There are 2 analog outputs located on TB1 - Row B (Bottom Terminals). Each
output outputs a +/-10V bipolar, differential signal. The D/A converter is 12 bits
including the sign (11 bits plus the sign bit).