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Statistics block – Rockwell Automation 5370 CVIM Communications Manual User Manual

Page 179

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Appendix C
Numerical Results Data

C–16

The Statistics Block can be formatted and read through any of the
communications ports. The Statistics Block has user defined contents. This
block may contain up to 64 words of data; see Table C.6.

Table C.6
Statistics Block

Word #

Bit #

Function

Notes

0

0 – 15

Block Transfer Signature

1 – 63

0 – 15

User Defined Statistics Data

Each type of statistic requires a specific number of words. Use the following
as a guideline when setting up a programmable block transfer.

Block Signature

= 1 Word

Number of Samples

= 1 Word (2 Byte Integer)

Minimum and Maximum

= 4 Bytes

Window (Object and Pixel)

32 Bit Integer

Window (Luminance)

16 Point 16

Widow (Template)

32 Bit Integer

Brightness Probe

16 Point 16

Reference Window

16 Bit Integer &
16 Point 16

Gage (Linear Measure)

16 Point 16

Gage (Edge, Pixel, Object)

32 Bit Integer

Average

= 4 Bytes

(16 Point 16 for fixed
point values)

Standard Deviation

= 4 Bytes (16 Point 16)

Each tool statistic consists of 18 bytes with the exception of reference
windows which contain 18 bytes for each feature or a total of 54 bytes. The
statistics block is transmitted as two hexadecimal characters for each byte.
The total number of bytes including the block signature should not exceed
128 bytes.

Statistics Block