Mitsubishi Electric MELSEC-Q Structured Programming Manual page 97

FXCPU Structured Programming Manual
[Device & Common]
2. In FX /FX /FX
1S 1N
General type
D0 to D127
FX PLCs
1S
128 points
D0 to D127
FX /FX
1N 1NC
PLCs
128 points
D0 to D199
FX /FX
2N 2NC
PLCs
200 points
*1. This area is not latched, but can be changed to the latched (backed-up) area by parameter setting.
*2. This area is latched, but can be changed to the non-latched (non-backed-up) area by parameter
setting.
*3. The characteristics about latch (backup) cannot be changed using parameters.
*4. Data registers D1000 and later can be used as file registers in units of 500 points by parameter
setting.
When simple N:N link or parallel link is used, some data registers are occupied for the link.
3. FX /FX /FX
0S 0 0N
General type
D0 to D29
FX /FX
0 0S
PLCs
30 points
D0 to D127
FX
0N
PLCs
128 points
FX /FX
U 2C
PLCs
D0 to D199
200 points
FX PLCs
U
(Ver. 2.30 or
earlier)
(Reference)
*1. This area is not latched, but can be changed to the latched (backed-up) area by parameter setting.
*2. This area is latched, but can be changed to the non-latched (non-backed-up) area by parameter
setting.
*3. This area is fixed to the latched (backed-up) type (, and the contents can be cleared by the RST and
ZRST instructions).
*4. This area is fixed to the non-latched (non-backed-up) type (, and the characteristics about latch
(backup) cannot be changed).
*5. Data registers D1000 and later can be used as file registers in units of 500 points by parameter
setting.
*6. Data registers D6000 to D7999 can be used as file registers by driving the special auxiliary relay
M8074 and prohibiting sampling trace.
Different from file registers secured inside the program memory, D6000 to D7999 are secured inside
the system memory of the PLC, and may be called "RAM file registers" (to notify that they are the
latched type).
/FX /FX PLCs
1NC 2N 2NC
Latched Fixed latched (battery backed-up) type
(battery
Battery
backed-up)
backed-up
type
- -
*3
- -
*3
D200 to D511 D512 to D7999
*1 *2
312 points 7488 points
/FX /FX PLCs
U 2C
Data registers
Latched (backed-up) type
-
*4
-
*4
D200 to D511
*2
312 points
For link
*1
Master→Slave:D490 to D499
Slave→Master:D500 to D509
Data registers
EEPROM Capacitor
backed-up backed-up
D128 to D255
-
*3
128 points
D128 to D255 D256 to D7999
*3
128 points 7744 points
- -
*3
→ Refer to the data communication manual.
Fixed latched
Special type
(backed-up) type
D30, 31
D8000 to D8069
*3
27 points
2 points
D128 to D255
D8000 to D8129
*3
38 points
128 points
D512 to D999
D8000 to D8137
*3
85 points
488 points
D8000 to D8135
-
69 points
2 Devices in Detail
2.8 Data Register and File Register [D]
File registers
(latched (battery
Special type
backed-up) type)
*4
D8000 to D8255
D1000 and later
256 points
1500 points maximum
*4
D8000 to D8255
D1000 and later
*3
256 points
7000 points maximum
*4
D8000 to D8255
D1000 and later
256 points
7000 points maximum
File registers
-
*5
D1000 and later
1500 points maximum
*5
D1000 and later
2000 points maximum
D6000 to D7999
2000 points(RAM file)
-
1
2
3
4
5
6
*6
7
95