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10 Applied Instructions (Rotation and Shift Operation)
10.10 SFRD / Shift Read [FIFO Control]
222
FXCPU Structured Programming Manual
[Basic & Applied Instruction]
10.10 SFRD / Shift Read [FIFO Control]
Outline
This instruction reads data for first-in first-out control.
1. Format and operation, execution form
2. Set data
3. Applicable devices
S: Refer to "Cautions".
FX3U(C) FX3G(C) FX3S FX2N(C) FX1N(C) FX1S FXU/FX2C FX0N FX0(S)
Instruction
name
Operation
Execution
form
Expression in each language
Structured ladder/FBD ST
SFRD 16 bits Continuous SFRD(EN,s,n,d);
SFRDP 16 bits Pulse SFRDP(EN,s,n,d);
Variable Description Data type
Input
variable
EN Execution condition Bit
Head word device storing data ANY16
Number of store points (for pointer, value is added by "+1".)
2 ≤ n ≤ 512
ANY16
Output
variable
ENO Execution state Bit
Word device storing data taken out first ANY16
Operand
type
Bit Devices Word Devices Others
System User Digit Specification
System
User
Special
Unit
Index
Constant
Real
Number
Character
String
Pointer
XYMTCS
D
.b
KnX KnY KnM KnS T C D R
U\G
VZModifier K H E
"
"
P
zzzzzz
S1 S2
z
zz
zzzzzz
S1 S2
zz z
SFRD
EN
s
n
ENO
d
SFRDP
EN
s
n
ENO
d