Allen-Bradley 2755 User Manual download pdf (Page 16)

Overview 1–8

You can configure a Reader as either a linear or raster scanner. The

orientation of the bar code label with the scanner usually determines

the scanning mode appropriate for the application.

Linear Mode

Linear

Scan Line Elevation

is adjustable.

Scan Line Elevation

is adjustable.

In the linear scan mode, the scan line elevation can be be adjusted.

Raster Mode

Raster

Upper and lower raster

limits are adjustable.

Raster increment is adjust-

able. Increment increases /

decreases the number of scan

lines in the raster pattern.

Flyback quickly returns the

scan line to the upper raster

limit after the lower limit is

reached.

In raster scan mode, you can adjust or select:

• Upper and lower raster limits

Upper Raster Angle

Lower Raster Angle

• Raster increment

Increment

Decrease Increase

• Flyback enable

Flyback

Scanning Modes

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Allen-Bradley 2755 User Manual Page 16