Allen-Bradley Logix5000 Reference Manual page 412

Chapter 9 Array (File)/Shift Instructions (BSL, BSR, FFL, FFU, LFL, LFU)
Condition
Prescan
.EN bit is set to prevent a
false load when scan begins.
.EM is cleared.
.DN is cleared.
Rung-condition-out is set
to false.
412
Execution:
Relay Ladder Action
Yes
.LEN < 0
No
Yes
.POS < 0
No
Yes
.POS = 0
No
Yes
≥
.POS .LEN
No
End
Rockwell Automation Publication 1756-RM003N-EN-P - October 2011
.EM is set.
.DN is set.
.EM is set.
.DN is set.