Emerson Mentor MP User Manual

Parameter
description
protocol
Performance
Menu
3
Parameter
structure
Keypad and
format
Advanced parameter
descriptions
Serial comms
5.4 Menu 3: Speed feedback and speed control
Speed accuracy and resolution
Digital reference resolution
When a preset speed is used the reference resolution is 0.1 rpm. Improved resolution can be obtained by using the precision reference (0.001 rpm).
Analog reference resolution
The analog input has a maximum resolution of 14bits plus sign. The resolution of the reference from analog inputs 2 or 3 is 10bits plus sign.
Analog feedback resolution
The resolution for both Armature voltage and tachometer feedback is 10bit plus sign.
Accuracy
With encoder feedback the absolute speed accuracy depends on the accuracy of the crystal used with the drive microprocessor. The accuracy of the
crystal is 100ppm, and so the absolute speed accuracy is 100ppm (0.01 %) of the reference, when a preset speed is used. If an analog input is used
the absolute accuracy is further limited by the absolute accuracy and non-linearity of the analog input. If analog feedback is used the accuracy is even
further limited.
Mentor MP Advanced User Guide 41
Issue Number: 4 www.onxcontrol.com

Emerson Mentor MP Specifications

General

Brand	Emerson
Model	Mentor MP
Category	DC Drives
Language	English