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33 Applied Instructions (Extension File Register Control)
33.2 SAVER / Save to ER
748
FXCPU Structured Programming Manual
[Basic & Applied Instruction]
33.2
SAVER / Save to ER
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 FX
3U
 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
FX
3U(C)
FX
3G(C)
FX
3S
FX
2N(C)
FX
1N(C)
FX
1S
FX
U
/FX
2C
FX
0N
FX
0(S)
Instruction 
name
Operation
Execution 
form
Expression in each language
Structured ladder/FBD
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
X Y M T C S D
.b KnX KnY KnM KnS T C D R U
\G
V Z Modifier K H
E
"
"
P
z
z
z z
z
z
SAVER
EN
s
n
ENO
d