174 Rockwell Automation Publication 450L-UM001D-EN-P - December 2019
Chapter 9 Connected Components Workbench Software
Reduced Resolution Blanking Rules
Tabl e 67 shows the rules for reduced resolution blanking. The Connected
Components Workbench software enforces these blanking rules automatically.
Since the transceiver sticks are synchronized with either the first or last lens, only
one end of the stick can be blocked (not both ends).
Table 67 - Reduced Resolution Rules
Object Height
Figure 141 on page 175 shows an example of a maximum object size selection of
two for both finger and hand resolution. For finger resolution, the beam width is
3.91 mm (0.15 in.), and the worst-case tolerance for beam spacing is 9.38 mm
(0.37 in.). An object that has a height of 14.85 mm (0.58 in.) never blocks more
than two beams. Blocking the third beam causes the OSSD outputs to turn OFF.
Therefore, the maximum height remains less than the formulas in Table 68
to
avoid nuisance tripping.
Table 68 - Formulas for Max Object Height
Resolution Object Size, Max Include/Exclude Lens 1 Lens Value, Min Lens Value, Max Rules
Finger (14 mm
[0.55 in.])
1…31
Include 1 5…n-1
Since Lens 1 is blanked, the last lens cannot be blanked.
Max Object Size <= Max Lens – Min Lens - 3
Examples:
Max Object Size = 1 and Min = 1, then Max = 5…n-1
Max Object Size = 4 and Min = 1, then Max = 8…n-1
Exclude 3 n
Since Lens 1 is not blanked, Lens 2 cannot be blanked.
Max Object Size <= Max Lens – Min Lens - 3
Examples:
Max Object Size = 1 and Min = 3, then Max = 7…n
Max Object Size = 4 and Min = 5, then Max = 12…n
Hand (30 mm
[1.18 in.])
2,4,6…n-12
Include 1 11,13,15...n-3
Since Lens 1 is blanked, the last lens cannot be blanked.
Max Object Size <= Max Lens – Min Lens - 8
Examples:
Max Object Size = 2 and Min = 1, then Max = 11…n-3
Max Object Size = 4 and Min = 1, then Max = 13…n
Exclude 4 13,15,17...n-1
Since Lens 1 is not blanked, Lens 3 cannot be blanked.
Max Object Size <= Max Lens – Min Lens - 7
Examples:
Max Object Size = 2 and Min = 4, then Max = 13…n-1
Max Object Size = 4 and Min = 6, then Max = 17…n-1
Resolution Formula
Finger (14 mm [0.55 in.])
Max object height is < Max Object Size Selection x 9.38 - 3.91
Example with Max Object Size = 2
< 2 x 9.38 - 3.91
< 14.85 mm (0.58 in.)
Hand (30 mm [1.18 in.])
Max object height is < Max Object Size Selection x 18.76 - 5.70
Example with Max Object Size = 2
< 2 x 18.76 - 5.70
< 31.82 mm (1.25 in.)
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