Allen-Bradley Logix5000 Reference Manual page 499

Condition
Compare
Compare.POS ≥
Compare.LEN
No
Source[compare.POS] =
Reference[compare.POS]
Yes
Compare.POS =
compare.POS + 1
Postscan
Relay Ladder Action
Yes Compare.POS = compare.LEN
Compare.DN bit is set.
No
Compare.FD bit is set.
Major Fault
The rung-condition-out is set to false.
Rockwell Automation Publication 1756-RM003N-EN-P - October 2011
Special Instructions (FBC, DDT, DTR, PID)
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page 498
Result.DN = 1
Examine result.DN
bit.
Result.DN = 0
Yes
Result.POS < 0
No
Yes
Result.LEN ≤ 0
No
Yes
Result.POS >
size of result array
no
Result[result.POS] = compare.POS
result.POS = result.POS + 1
No
Result.POS >
result.LEN
yes
Result.DN bit is set.
Chapter 13
Result.DN bit is cleared.
Result.POS value is
cleared.
Compare.ER bit is set.
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Exit
page 498
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