Mitsubishi Electronics FX3S Manual De Usuario
313
FX
3S
/FX
3G
/FX
3GC
/FX
3U
/FX
3UC
Series
Programming Manual - Basic & Applied Instruction Edition
11 Rotation and Shift Operation – FNC 30 to FNC 39
11.10 FNC 39 – SFRD / Shift Read [FIFO Control]
11
FN
C30
-FN
C3
C30
-FN
C3
9
R
ota
tion and
Shi
ft
ft
12
FN
C40-FN
C40-FN
C49
D
ata O
perati
perati
on
13
FNC
50-FNC
59
High-Speed
Proc
essing
14
FM
C60-FN
C60-FN
C69
H
andy
In
struction
15
FN
C70-FN
C70-FN
C79
E
xternal
F
X
I/O
De
vice
16
FNC
80-FNC
89
External
FX
Dev
ice
ice
17
FNC1
00-
FNC10
00-
FNC10
9
Dat
a
a
Transfer 2
18
FNC1
10-
FNC139
FNC139
Fl
oati
ng Poi
nt
19
FNC14
0-F
N
C
149
Da
ta
Operation 2
20
FNC1
50-
FNC159
FNC159
Pos
itioning
itioning
Control
11.10 FNC 39 – SFRD / Shift Read [FIFO Control]
Outline
This instruction reads data for first-in first-out control.
1. Instruction format
2. Set data
*1.
"+1" is required for the pointer.
3. Applicable devices
S1: This function is supported only in FX
3G
/FX
3GC
/FX
3U
/FX
3UC
PLCs.
S2: This function is supported only in FX
3U
/FX
3UC
PLCs.
Explanation of function and operation
1. 16-bit operation (SFRD and SFRDP)
+1 written in turn by SFWR (FNC 38) instruction is transferred (read) to
, and "n-1" words from
+1
are shifted rightward by 1 word. "1" is subtracted from the number of data, stored in
.
Operand Type
Description
Data Type
Head word device number storing data
(The first word device works as the pointer, and data is stored in
(The first word device works as the pointer, and data is stored in
+1 and later.)
16-bit binary
Word device number storing data taken out first 2
≤ n ≤ 512
16-bit binary
n
Number of store points plus "1"
*1
2
≤ n ≤ 512
16-bit binary
Oper-
and
Type
Bit Devices
Word Devices
Others
System User
Digit Specification
System User
Special
Unit
Index
Con-
stant
stant
Real
Number
Charac-
ter String
Pointer
X Y M T C S D .b KnX KnY KnM KnS T C D
R U \G
V Z Modify K H
E
" "
P
S1
S2
S1
S2
n
P
FNC 39
SFRD
16-bit Instruction
7 steps
Mnemonic
Operation Condition
Continuous
Operation
Pulse (Single)
Pulse (Single)
Operation
SFRD
SFRDP
−
−
−
Mnemonic
Operation Condition
32-bit Instruction
S
S
D
S
D
S
1
D
S
1
S
n
Command
input
FNC 39
SFRDP
SFRDP
D
S