Allen-Bradley Logix5000 Reference Manual page 355

Condition
.EN Bit = 1
.POS = .POS + 1
Mode = .LEN
Postscan
Array (File)/Misc. Instructions (FAL, FSC, COP, CPS, FLL, AVE, SRT, STD, SIZE)
Relay Ladder Action
Numeric
Mode
Examine .EN bit.
.EN Bit = 0
Bit = 1
Examine
internal bit.
Bit = 0
Internal bit is set.
Yes
.POS ≥ .LEN
No
No
.LEN ≥ mode
Yes
.EN bit is set.
loop_count = .LEN - .POS
≥
Yes
Mode
loop_count
No
.EN bit is set.
Loop_count = mode
The rung-condition-out is set to false.
Rockwell Automation Publication 1756-RM003N-EN-P - October 2011
Yes
.POS = 0
No
.POS = .POS - 1
.DN bit is set.
.EN bit is set.
Common
page 352
Rung-condition-out is set
to true.
End
Chapter 8
355