Rockwell Automation 1761-HHP-B30 MicroLogix 1000 with Hand-Held Programmer (HHP) - Manual (Page 208)

Chapter 11
Using Data Handling Instructions
11–25
FFL and FFU instructions are used in pairs. The FFL instruction loads words
into a user-created file called a FIFO stack. The FFU instruction unloads
words from the FIFO stack in the same order as they were entered.
Entering the Instructions
You enter the instruction from within the program monitor functional area.
While entering the FFL instruction, you see these screens:
P 0 0 0 F F L S R C
N 1 0
P 0 0 0 F F L F I F O
# N 1 2
P 0 0 0 F F L C T R L
R 0
P 0 0 0 F F L L E N
* * * * 3 4
P 0 0 0 F F L P O S
* * * * * 9
FIFO Load (FFL) and
FIFO Unload (FFU)
(EM)
(EN)
(DN)
(EM)
FFL
FIFO LOAD
Source
N7:10
FIFO #N7:12
Control R6:0
Length 34
Position 9
(EU)
FFU
FIFO UNLOAD
FIFO
#N7:12
Dest N7:11
Control R6:0
Length 34
Position 9
(DN)
73.78+4.34 x
position value
False True
33.67 FFL
34.90 FFU
61.13
Execution Times (
µ
sec) when:
Ladder representation:
3
U
To enter the function code, press:
ENT
1
FUN
1