Allen-Bradley Logix5000 Reference Manual page 431

Condition
Rung-condition-in is false.
.EU bit is cleared.
.LEN < 0
No
.POS < 0
No
.EM is cleared.
.DN is cleared.
.POS = 0
No
≥
.POS .LEN
No
Rung-condition-out is set
to false.
End
Relay Ladder Action
Yes
Yes
Yes
.EM is set.
Yes
.DN is set.
Rockwell Automation Publication 1756-RM003N-EN-P - October 2011
Array (File)/Shift Instructions (BSL, BSR, FFL, FFU, LFL, LFU)
.EM is set.
.DN is set.
Chapter 9
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