Mitsubishi Electric MELSEC-Q Structured Programming Manual page 110

FXCPU Structured Programming Manual
[Device & Common]
1. Relationship between extension file registers and extension registers
Extension file registers and extension registers have the following positional relationship inside the PLC.
a) FX /FX
3U
General-purpose device
(sequence program)
b) FX /FX
3G
General-purpose device
(sequence program)
*1. Memory cassette cannot be connected to FX
108
PLCs
3UC
Extension registers(R)
Available in built-in RAM
R0
2048 points
R2048
2048 points
General applied
R4096
instruction
2048 points
LOGR instruction
INITR instruction
(initialization)
(in units of sector)
R30720
R32767
PLCs
3GC
Extension registers(R)
Available in built-in RAM
R0
General applied
instruction
R23999
2.9 Extension Register [R] and Extension File Register [ER]
SAVER instruction
(in units of sector)
RWER instruction
(in units of point)
LOADR instruction
(in units of point)
INITR instruction
(initialization)
(in units of sector)
All points are
written at one time.
Programming tool
GX Works2
RWER instruction
(in units of point)
LOADR instruction
(in units of point)
All points are
written at one time.
Programming tool
GX Works2
PLCs.
3GC
Extension file registers(ER)
Available in attached memory cassette
ER0
2048 points 1 sector
ER2048
2048 points
ER4096
2048 points
ER6144
2048 points
ER30720
ER32767
Nonvolatile memory
Extension file registers(ER)
Available in built-in EEPROM
or attached memory cassette
ER0
ER23999
Nonvolatile
memory
2 Devices in Detail
16 sectors
*1