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33 Applied Instructions (Extension File Register Control)
33.5 RWER / Rewrite to ER
766
FXCPU Structured Programming Manual
[Basic & Applied Instruction]
Function and operation explanation
1. 16-bit operation (RWER)
1) For the FX3U and FX3UC PLCs
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.
2) For the FX3G and FX3GC PLCs
a) When connecting a memory cassette (A memory cassette cannot be connected to FX
3GC PLC.)
The contents (current values) of the "n" points of extension registers (R) starting from are written
(transferred) to the extension file registers (ER) having the same numbers as the extension registers
(R) in the memory cassette (EEPROM).
b) When not connecting a memory cassette
The contents (current values) of the "n" points of extension registers (R) starting from are written
(transferred) to the extension file registers (ER) having the same numbers as the extension registers
(R) in the PLC's built-in EEPROM.
RWERP
EN ENO
s
n
Command
input
Device of extension register storing data
Number of written (transferred) devices
E
E+1
E+2
E
Write (transfer)
*1
Extension file registers (ER)
inside memory cassette
Extension registers (R)
inside built-in RAM
*1. All points specified by the instruction are written (transferred).
s
s
s
s s
s
s
s
+1
+2
+
n
-1
s
+
n
-1
E
E+1
E+2
E
Write (transfer)
*1
s
s
s
s s
s
s
s
+1
+2
+
n
-1
s
+
n
-1
Extension file registers (ER)
inside memory cassette
Extension registers (R)
inside built-in RAM
*1. All points specified by the instruction are written (transferred).
E
E+1
E+2
E
Write (transfer)
*1
s
s
s
s s
s
s
s
+1
+2
+
n
-1
s
+
n
-1
Extension file registers (ER)
inside PLC's built-in EEPROM
Extension registers (R)
inside built-in RAM
*1. All points specified by the instruction are written (transferred).