Mitsubishi Electric FX3G SERIES, Programming Manual

Page: 37 / 948

35
FX
3G
/FX
3U
/FX
3UC
Series Programmable Controllers
Programming Manual - Basic & Applied Instruction Edition
2 Overview (Sequence Program)
2.6 Program Memory and Devices
1
Introdu
ction
2
Ov
ervi
ew
3
Instruction Li
st
4
D
evices
in Det
ail
5
Specifi
ed the
De
vice
&
C
onst
ant
6
Bef
ore Pr
og
ra
mmi
ng
7
Bas
ic Instruction
8
FN
C00-FN
C0
9
Program Fl
ow
9
FNC
10-FN
C19
Mov
e & Com
pare
10
FNC
20-FNC
29
Arith. & Lo
gi
c
Operati
on
2. In FX
3G
PLCs
FX
3G
PLCs are equipped with the EEPROM memory as standard.
1) When using the built-in memory (without attached memory cassette)
2) When using an attached memory cassette (without using the built-in program memory)
CPU System ROM
Built-in program memory
(EEPROM)
Parameter
File register (D)
Special setting
Comment
Sequence program
(EEPROM)
Memory cassette
Built-in device memory (RAM, EEPROM)
[Bit device memory]
•
Data register (D)
•
Timer present value register (T)
•
Counter present value register (C)
•
Index register (V, Z)
Contact image memory
•
Input relay (X)
•
Output relay (Y)
•
Auxiliary relay (M)
•
State relay (S)
Timer contact and time counting coil
Counter contact, counting coil, and reset coil
•
Extension register (R)
[Data memory]
Transfer and initialization by
instructions
Extension file register (ER)
Not attached
CPU System ROM
Built-in program memory
(EEPROM)
Not used
(EEPROM)
Parameter
File register (D)
Special setting
Comment
Sequence program
Extension file register (ER)
Built-in device memory (RAM, EEPROM)
[Bit device memory] [Data memory]
Transfer and initialization by
instructions
Contact image memory
•
Input relay (X)
•
Output relay (Y)
•
Auxiliary relay (M)
•
State relay (S)
Timer contact and time counting coil
Counter contact, counting coil, and reset coil
•
Data register (D)
•
Timer present value register (T)
•
Counter present value register (C)
•
Index register (V, Z)
•
Extension register (R)
Memory cassette
The PLC automatically recognizes attachment of a
memory cassette (when the power is turned ON),
and disconnects the built-on program memory.
(The priority is given to the memory cassette.)