7 APPLICATION INSTRUCTION
7.5 Data table operation instruction
353
7
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.
■Descriptions, ranges, and data types
■Applicable devices
Ladder diagram Structured text
ENO:=POP(EN,s,n,d);
ENO:=POPP(EN,s,n,d);
Operand Description Range Data type Data type (label)
(s) Head device number storing the first-in data (including pointer
data) (start number of the word device storing the data)
16-bit signed binary ANY16
(d) Device number storing last-out data 16-bit signed binary ANY16
(n) Length of data array
(Add "1" because pointer data is also included.)
2 to 32768 16-bit unsigned binary ANY16
Operand Bit Word Double word Indirect
specification
Constant Others
X, Y, M, L,
SM, F, B, SB
U\G T, ST,
C, LC
T, ST, C, D,
W, SD, SW, R
U\G Z LC LZ K, H E $
(s)
(d)
(n)
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