Mitsubishi Electric FX3G SERIES Programming Manual page 716

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 extension file registers (ER) stored in a memory cassette (EEPROM) with the
same numbers as the extension registers specified by
transferred to the extension registers specified by
Command
input
Extension file registers (ER)
inside memory cassette
E S
E S
E S
S
E
S
E
E S
•Reading (transfering) is executed in device units. Up to 24,000 devices can be read (transferred).
b) When a memory cassette is not connected
In the program example below, the contents (current value) of extension file registers (ER) which are stored in
the EEPROM built in the PLC and have the same device numbers as extension registers
1 are read, and transferred to extension registers (R) which are stored in the RAM built in the PLC and have
the device numbers
Command
input
Extension file registers (ER)
inside built-in EEPROM
E
E
E
E
E
E
•Reading (transfering) is executed in device units. Up to 24,000 devices can be read (transferred).
714
FNC290
S
LOADRP
Read
(transfer)
+1
+2
+3
+n-2
+n-1
S to S
FNC290
S
LOADRP
Read
(transfer)
S
S +1
S +2
S
+3
S +n-2
S +n-1
33 Extension File Register Control – FNC290 to FNC299
to
S
S to S
n
Extension registers (R)
inside built-in RAM
S
S +1
S +2
S +3
+n-2
S
S +n-1
+n-1.
n
Extension registers (R)
inside built-in memory
S
S +1
S +2
S +3
+n-2
S
S +n-1
33.1 FNC290 – LOADR / Load From ER
+n-1 are read, and
S
+n-1 stored in the PLC's built-in RAM.
S to S +n-