Allen-Bradley Logix5000 Reference Manual page 351

Condition
Prescan
Rung-condition-in is false.
.DN Bit = 0
Examine .DN Bit
.DN Bit = 1
.EN bit is cleared.
.ER bit is cleared.
Rung-condition-out is set
to false.
End
Array (File)/Misc. Instructions (FAL, FSC, COP, CPS, FLL, AVE, SRT, STD, SIZE)
Execution:
Relay Ladder Action
The rung-condition-out is set to false.
No
INC Mode
Yes
.EN bit is cleared.
Yes
.POS = 0
No
.POS = .POS - 1
.DN bit is set .
.EN bit is set.
Rockwell Automation Publication 1756-RM003N-EN-P - October 2011
Internal bit is cleared
No
ALL Mode
Yes
.POS = .POS + 1
Yes
No
.POS < .LEN
.LEN > Mode
.DN bit is set.
.EN bit is cleared.
Yes
.LEN < 0 Or
Major Fault
.POS < 0
No
.LEN = 0
No
Yes
No
Yes
Mode = .LEN
Numeric
Mode
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Chapter 8
351