7 Applied Instructions
7.27 Extension File Register Control
763
FXCPU Structured Programming Manual
(Basic & Applied Instruction)
1
Outline
2
Instruction List
3
Configuration of
Instruction
4
How to Read
Explanation of
Instructions
5
Basic Instruction
6
Step Ladder
Instructions
7
Applied
Instructions
8
Interrupt Function
and Pulse Catch
Function
A
Relationships
between devices
and addresses
7.27.2 SAVER
Outline
This instruction writes the current values of extension registers (R) stored in the PLC's built-in RAM to
extension file registers (ER) stored in a memory cassette (flash memory) in units of sector (2048 points).
RWER instruction provided in FX
3UC PLCs Ver. 1.30 or later and FX3U PLCs writes (transfers) only arbitrary
number of points. It is not necessary to execute INITR or INITER instruction every time when RWER
instruction is used.
1. Format and operation, execution form
2. Set data
3. Applicable devices
FX3U(C) FX3G FX2N(C) FX1N(C) FX1S FXU/FX2C FX0N FX0(S)
Instruction
name
Operation
Execution
form
Expression in each language
Structured ladder ST
SAVER 16 bits Continuous SAVER(EN,s,n,d);
Variable Description Data type
Input
variable
EN Execution condition Bit
Device of extension register to which data is to be written (Only the head
device of a sector of extension registers can be specified.)
ANY16
Number of points written (transferred) in one operation cycle. ANY16
Output
variable
ENO Execution state Bit
Device storing the number of already written points ANY16
Operand
type
Bit Devices Word Devices Others
System user Digit specification
System
user
Special
unit
Index
Cons
tant
Real
Number
Character
String
Pointer
XYMTCS
D.b
KnX KnY KnM KnS T C D R
U\G
VZModifierKH E
""
P
zz
zz
zz
SAVER
EN
s
n
ENO
d
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