Rockwell Automation Allen-Bradley 140M, User Manual

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152 Rockwell Automation Publication 450L-UM001F-EN-P - March 2022
Chapter 9 Connected Components Workbench Software
Object Height
Figure 147 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. If the third beam is blocked, the OSSD outputs turn OFF.
Therefore, the maximum height remains less than the formulas in
Table 70 to
avoid nuisance tripping.
Figure 147 - Max Object Height Example (mm [in.])
Table 71 on page 153 shows maximum object size for selections 1…10. Use the
appropriate formula in Table 71 on page 153 for larger values.
Table 69 - Reduced Resolution Rules
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
Table 70 - Formulas for Max Object Height
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.)
3.91 (0.15)
14.85 (0.58)
9.38 (0.37)
9.38 (0.37)
5.70 (0.22)
18.76 (0.74)
18.76 (0.74)
31.82(1.25)