726
FX
3U
/FX
3UC
Series Programmable Controllers
Programming Manual - Basic & Applied Instruction Edition
33 Extension File Register Control – FNC290 to FNC299
33.5 FNC294 – RWER / Rewrite to ER
33.5
FNC294 – RWER / Rewrite to ER
Outline
This instruction writes the current values of an arbitrary number of extension registers (R) in the PLC’s built-in
RAM to extension file registers (ER) in a memory cassette (flash memory).
Because RWER (FNC294) instruction is not supported in FX
3UC
PLCs former than Ver.1.30, use SAVER
(FNC291) instruction instead.
→
For SAVER (FNC291) instruction, refer to Section 33.2.
1. Instruction format
2. Set data
3. Applicable devices
Explanation of function and operation
1. 16-bit operation (RWER)
The contents (current values) of “n” extension registers (R) starting from
are written (transferred) to
extension file registers having the same device numbers in a memory cassette (flash memory).
• When “n” is set to “0”, it is handled as “32768” when the instruction is executed.
Operand Type
Description
Data Type
Device number of extension register storing data
16-bit binary
n
Number of written (transferred) devices [0
≤
n
≤
32767]
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
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
3
3
n
3
3 3
P
FNC 294
RWER
Mnemonic
Operation Condition
16-bit Instruction
5 steps
RWER
Mnemonic
Operation Condition
Continuous
Operation
32-bit Instruction
⎯
⎯
RWERP
Pulse (Single)
Operation
S
S
S
FNC294
RWERP
n
S
Command
input
E
E +1
E +2
E +n-1
+1
+2
+n-1
*1
*1 All points specified by the instruction are written (transferred).
Write
(transfer)
Extension file registers (ER)
inside memory cassette
Extension registers (R) inside
built-in RAM memory
S
S
S
S
S
S
S
S
Содержание FX3U Series
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