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17 Applied Instructions (Data Transfer 2)
17.2 ZPOP / Batch POP of Index Register
437
FXCPU Structured Programming Manual
[Basic & Applied Instruction]
11
Appl
ied
 In
stru
cti
ons 
(D
ata O
per
at
io
n)
12
Ap
plied
 Instru
ctio
ns 
(High S
peed 
Process
ing)
13
App
lied Instr
ucti
ons 
(Handy
 
Instruction)
14
Ap
pl
ied In
struct
ions 
(External FX I/O
 
D
evice)
15
Appl
ied
 Instru
cti
ons
 
(External
 Dev
ice 
(op
tional
 dev
ice)
)
16
App
lie
d Instr
uction
(E
xter
nal
 Devi
ce)
17
Ap
pl
ied Inst
ruct
io
ns 
(Dat
a T
ransf
er 2)
18
Appl
ied
 In
stru
cti
ons 
(Float
ing P
oin
t)
19
App
lie
d Instr
uction
(D
at
a Oper
at
ion 2)
20
App
lied Inst
ructi
ons 
(Pos
itioning 
Control)
17.2
ZPOP / Batch POP of Index Register
Outline
This instruction returns the contents of index registers V0 to V7, Z0 to Z7 once retracted by the ZPUSH
instruction to the original state.
→ As for ZPUSH instruction, refer to section 17.1.
1. Format and operation, execution form
2. Set data
3. Applicable devices
Function and operation explanation
1. 16-bit operation (ZPOP/ZPOPP)
→ As for the function and operation, refer to section 
17.1.
1) The contents of index registers Z0 to Z7, V0 to V7 once retracted after the device specified by 
 by
ZPUSH instruction are restored in the original index register. When the contents of the index register are
restored, the number of retraction of the device specified by 
 is processed by -1.
2) Use ZPUSH instruction for temporary retraction of data.
Use ZPUSH, ZPOP instructions in pair.
FX
3U(C)
FX
3G(C)
FX
3S
FX
2N(C)
FX
1N(C)
FX
1S
FX
U
/FX
2C
FX
0N
FX
0(S)
Instruction 
name
Operation
Execution 
form
Expression in each language
Structured ladder/FBD
ST
ZPOP
16 bits
Continuous
ZPOP(EN, d);
ZPOPP
16 bits
Pulse
ZPOPP(EN, d);
Variable
Description
Data type
Input
variable
EN
Execution condition
Bit
Output
variable
ENO
Execution state
Bit
Head device once retracting the contents of index registers V0 to V7, Z0 to
Z7 [(1+16 
× times of retraction) occupied]
ANY16
Operand 
type
Bit Devices
Word Devices
Others
System user
Digit designation
System 
user
Special 
unit
Index
Con
stant
Real 
Number
Character 
String
Pointer
X Y M T C S D
.b KnX KnY KnM KnS T C D R
U
\G
V Z Modifier K H
E
"
"
P
z z
ZPOP
EN
ENO
d
ZPOPP
EN
ENO
d
Command
input
ZPOP
EN
ENO
d
Head device once retracting
the contents of index registers