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7 APPLICATION INSTRUCTION
7.9 Index register operation instruction
Returning all data of the index register
ZPOP(P)
These instructions read the data saved in the devices specified by (d) and later to index registers and long index registers.
■Descriptions, ranges, and data types
■Applicable devices
• These instructions read the data saved in the devices specified by (d) and later to index registers and long index registers.
• When the saved contents of the index registers and long index registers are read, "1" is subtracted from (d).
• The ZPUSH(P) instructions are used to temporarily save the data. The ZPUSH(P) and ZPOP(P) instructions are used in
pairs.
Ladder diagram Structured text
ENO:=ZPOP(EN,d);
ENO:=ZPOPP(EN,d);
Operand Description Range Data type Data type (label)
(d) Head device number for returning the data of index registers 16-bit signed 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 $
(d)
Error code
(SD0/SD8067)
Description
2820 The range of points used in (d) or later exceeds the range of the target device/label area.
3405 (d) is 0 or negative.
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