Mitsubishi Electric MELSEC FX3U Programming Manual page 780

FX /FX /FX Series Programmable Controllers
3G 3U 3UC
Programming Manual - Basic & Applied Instruction Edition
2) In FX PLCs
3G
a) When a memory cassette is connected
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).
Command
input
Extension registers (R) inside
built-in RAM memory
S
S
S
S
*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
(transferred) to extension file registers which are stored in the EEPROM built in the PLC and have the
same device numbers..
Command
input
Extension registers (R) inside
built-in RAM memory
S
S
S
S
*1 All points specified by the instruction are written (transferred).
778
FNC290
S
RWERP
Write
(transfer)
+1
+2
+n-1
FNC290
S
RWERP
Write
(transfer)
+1
+2
+n-1
33 Extension File Register Control – FNC290 to FNC299
n
Extension file registers (ER)
inside memory cassette
*1
E S
S
E +1
E S +2
E +n-1
S
n
Extension file registers (ER)
*1 inside built-in EEPROM
E S
S
E +1
E S +2
E +n-1
S
33.5 FNC294 – RWER / Rewrite to ER
are written
S