Programmer (HHP) User guide

Chapter 1 1
Using Data Handling Instructions
11–28
LFL and LFU instructions are used in pairs. The LFL instruction loads
words into a user-created file called a LIFO stack. The LFU instruction
unloads words from the LIFO stack in the opposite order as they were
entered.
Entering the Instructions
You enter the instructions from within the program monitor functional area.
While entering the LFL instruction, you see these screens:
P
0 0 0 L F L S R C
N 1 0
P
0 0 0 L F L L I F O
# N 1 2
P
0 0 0 L F L C T R L
R 0
P
0 0 0 L F L L E N
* * * * 3 4
P
0 0 0 L F L P O S
* * * * * 9
LIFO Load (LFL) and
LIFO Unload (LFU)
(EN)
(DN)
(EM)
LFL
LIFO LOAD
Source N7:10
LIFO #N7:12
Control R6:0
Length 34
Position 9
(EU)
(DN)
(EM)
LFU
LIFO UNLOAD
LIFO #N7:12
Dest N7:11
Control R6:0
Length 34
Position 9
False
61.13
True
33.67LFL
64.20 35.08LFU
Execution Times (µ sec) when:
(EN)
(DN)
(EM)
(EU)
(DN)
Ladder representation:
5
To enter the function code, press:
ENT
1
FUN
1