20.09.2015 Views

Mentor MP

Mentor MP UG Iss 5.book

Mentor MP UG Iss 5.book

SHOW MORE
SHOW LESS
  • No tags were found...

You also want an ePaper? Increase the reach of your titles

YUMPU automatically turns print PDFs into web optimized ePapers that Google loves.

Safety<br />

Information<br />

Product<br />

information<br />

Mechanical<br />

Installation<br />

Electrical<br />

installation<br />

Getting<br />

started<br />

Basic Running the<br />

parameters motor<br />

Optimization SMARTCARD<br />

operation<br />

Onboard<br />

PLC<br />

Advanced<br />

parameters<br />

Technical<br />

data<br />

Diagnostics<br />

UL<br />

information<br />

11.3 Menu 3: Speed feedback and speed control<br />

Speed accuracy and resolution<br />

Digital reference resolution<br />

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).<br />

Analog reference resolution<br />

The analog input has a maximum resolution of 14 bits plus sign. The resolution of the reference from analog inputs 2 or 3 is 10 bits plus sign.<br />

Analog feedback resolution<br />

The resolution for both Armature voltage and tachogenerator feedback is 10 bit plus sign.<br />

Accuracy<br />

With encoder feedback the absolute speed accuracy depends on the accuracy of the crystal used with the drive microprocessor. The accuracy of the<br />

crystal is 100 ppm, and so the absolute speed accuracy is 100 ppm (0.01 %) of the reference, when a preset speed is used. If an analog input is used<br />

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<br />

further limited.<br />

<strong>Mentor</strong> <strong>MP</strong> User Guide 105<br />

Issue: 5<br />

www.controltechniques.com

Hooray! Your file is uploaded and ready to be published.

Saved successfully!

Ooh no, something went wrong!