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FX3S/FX3G/FX3GC/FX3U/FX3UC Series
Programming Manual - Basic & Applied Instruction Edition
33 Extension File Register Control – FNC290 to FNC299
33.5 FNC294 – RWER / Rewrite to ER
2) In FX3G/FX3GC PLCs
a) When a memory cassette is connected (A memory cassette can be connected only to FX
3G PLC.)
The contents (current values) of “n” extension registers (R) starting from are written (transferred) to extension
file registers having with same device numbers in a memory cassette (flash memory).
*1. All points specified by the instruction are written (transferred).
b) When a memory cassette is not connected
The contents (current values) of "n" extension registers (R) starting from are written (transferred) to
extension file registers which are stored in the EEPROM built into the PLC and have the same device
numbers.
*2. All points specified by the instruction are written (transferred).
FNC290
RWERP
S n
Command
input
E
E +1
E +2
E +n-1
+1
+2
+n-1
*1
Write
(transfer)
Extension file registers (ER)
inside memory cassette
Extension registers (R) inside
built-in RAM
S
S
S
S
S
S
S
S
S
FNC290
RWERP
S n
Command
input
E
E +1
E +2
E +n-1
+1
+2
+n-1
*2
Write
(transfer)
Extension registers (R) inside
built-in RAM
S
S
S
S
S
S
S
S
Extension file registers (ER)
inside built-in EEPROM