Allen-Bradley Logix5000 Reference Manual page 363

Condition
Rung-condition-in is true.
.ER Bit = 0
Examine .ER bit.
.ER Bit = 1
.DN Bit = 1
.DN Bit = 1
Postscan
Array (File)/Misc. Instructions (FAL, FSC, COP, CPS, FLL, AVE, SRT, STD, SIZE)
Relay Ladder Action
.LEN < 0 or
.POS < 0
.DN Bit = 0
Examine .IN bit. .LEN = 0
.IN Bit = 0
.DN bit is set.
.EN bit is set.
Examine .DN bit.
Common
.DN Bit = 0
Loop_count =
Loop_count - 1
Loop_count < 0
.POS = .POS + 1
.POS = .LEN
.DN bit is set.
The rung-condition-out is set to false.
Rockwell Automation Publication 1756-RM003N-EN-P - October 2011
Yes
Major Fault
No
No
INC Mode
Yes
yes
INC
Mode
page 353
No
.POS = .POS + 1
yes
Evaluate Comparison
Match
.EN bit is set.
.FD bit is set.
No
Yes
.POS = .POS + 1
Rung-condition-out is
set to true.
page 355
Numeric
Mode
No
No
ALL mode
Yes
ALL
Mode
page 354
No
Yes
Chapter 8
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