Rockwell-automation 5720 DriveLogix System Manual do Utilizador descarregar pdf (Página 113)

Publication 20D-UM002C-EN-P - November 2003

Configuring DriveLogix Motion 5-9

Enter the positioning units.

In this example inches are the units. Degrees, pallets,

widgets, etc. could be used.

The Average Velocity Timebase is the sample rate

that is used for the Average Velocity tag in the

controller tags.

Select the Positioning Mode

Enter the Conversion Constant - this is the

number of feedback counts for each

Positioning Unit. In this example the encoder

is attached to a ball screw with a pitch of 5

turns per inch. The encoder has a resolution

of 1024 pulses per revolution that produces

4096 counts of feedback in quadrature mode.

Therefore the Conversion Constant = 4096 ×

5 = 20480 counts / inch.

5. Adding the Axis (continued)

Determine how many Output Cam execution nodes

(instances) are created for a specific axis.

The value specified for Execution Target in the MAOC

instruction references a specific instance in which a

value of zero selects the first instance.

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Rockwell-automation 5720 DriveLogix System Manual do Utilizador Página 113