Mitsubishi Electronics FX3G User Manual
310
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
11.9 FNC 38 – SFWR / Shift Write [FIFO/FILO Control]
11.9
FNC 38 – SFWR / Shift Write [FIFO/FILO Control]
Outline
This instruction writes data for first-in first-out (FIFO) and last-in first-out (LIFO) 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.
Operand Type
Description
Data Type
Word device number storing data to be put in first
16-bit binary
Head word device number storing data (The first word device works as the pointer, and
data is stored in
data is stored in
+1 and later)
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
16-bit Instruction
7 steps
Mnemonic
Operation Condition
Continuous
Operation
Pulse (Single)
Pulse (Single)
Operation
SFWR
SFWRP
−
−
−
Mnemonic
Operation Condition
32-bit Instruction
P
FNC 38
SFWR
S
D
D
S
D