Mitsubishi Electric MELSEC FX3U - FNC 38 - SFWR; Shift Write [FIFO;FILO Control]

325
FX3G/FX3U/FX3UC Series Programmable Controllers
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
FNC30-FNC39 Rotation and Shift
12
FNC40-FNC49 Data Operation
13
FNC50-FNC59 High Speed Processing
14
FMC60-FNC69 Handy Instruction
15
FNC70-FNC79 External FX I/O Device
16
FNC80-FNC89 External FX Device
17
FNC100-FNC109 Data Transfer 2
18
FNC110-FNC139 Floating Point
19
FNC140-FNC149 Data Operation 2
20
FNC150-FNC159 Positioning 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
S: This function is supported only in FX3U/FX3UC 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 +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
Real
Number
Charac-
ter String
Pointer
XYMTCSD
 .b KnX KnY KnM KnS T C D R U\G VZModifyKH E "  "P
33333333 S 33333
3 3 3 3333 S 3
n
33
16-bit Instruction
7 steps
Mnemonic Operation Condition
Continuous
Operation
Pulse (Single)
Operation
SFWR
SFWRP
−
−
Mnemonic Operation Condition
32-bit Instruction
P
FNC 38
SFWR
S
D
D
S
D