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Reading the newest data from the data table
POP(P)
These instructions read the latest data written by a shift write (SFWR) instruction for FIFO/FILO control.
Ladder diagram
(s)
(d)
(n)
Setting data
■Descriptions, ranges, and data types
Operand
Description
(s)
Head device number storing the first-in data (including pointer
data) (start number of the word device storing the data)
(d)
Device number storing last-out data
(n)
Length of data array
(Add "1" because pointer data is also included.)
■Applicable devices
Operand
Bit
X, Y, M, L,
U\G T, ST,
SM, F, B, SB
(s)
(d)
(n)
Structured text
ENO:=POP(EN,s,n,d);
ENO:=POPP(EN,s,n,d);
Word
T, ST, C, D,
U\G
C, LC
W, SD, SW, R
Range
Data type
16-bit signed binary
16-bit signed binary
2 to 32768
16-bit unsigned binary
Double word Indirect
specification
Z
LC
LZ
7 APPLICATION INSTRUCTION
7.5 Data table operation instruction
Data type (label)
ANY16
ANY16
ANY16
Constant
Others
K, H
E
$
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7
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