Memory Operations And Latched (Battery Backed) (Power On/Off And Run/Stop) - Mitsubishi FX3U Series Programming Manual

FX /FX Series Programmable Controllers
3U 3UC
Programming Manual - Basic & Applied Instruction Edition
2.6.2 Memory operations and latched (battery backed)
(power ON/OFF and RUN/STOP)
1. Backup operation
The operations of the data memory, bit device memory and program memory in FX
classified as shown below:
1) Types of program memory
Parameter
Sequence program
Comment
File register
2) Types of word device memory
Data register (D)
Extension register (R)
Extension file register
*2
(ER)
Index register (V, Z)
Timer present value
register (T)
Counter present value
register (C)
Clock data
*1. Some devices are cleared when the PLC status switches from STOP to RUN.
*2. An optional memory cassette is required.
34
Item
Can be secured by
parameter setting.
Item
General type
latched (battery
backed) type
File type
Special type
latched (battery
backed) type
File type
V, Z
For 100 ms
For 10 ms
Retentive type for 100 ms
Retentive type for 1 ms
General type
latched (battery
backed) type
High speed type
Present value
2.6 Program Memory and Devices (Battery Backed)
Power
Power OFF
OFF→ON
Does not change.
Does not change.
Does not change.
Does not change.
Power
Power OFF
OFF→ON
Cleared.
Does not change.
Does not change.
Set to initial
Cleared.
*1
values.
Does not change.
Does not change.
Cleared.
Cleared.
Cleared.
Does not change.
Does not change.
Cleared.
Does not change.
Does not change.
Does not change.
→ For special data registers, refer to Chapter 36.
2 Overview (Sequence Program)
/FX PLCs are
3U 3UC
STOP→RUN RUN→STOP
STOP→RUN RUN→STOP
Does not
Cleared.
change.
Does not change while M8033 is
ON.
*1
Does not change.
Does not change.
Does not
Cleared.
change.
Does not change while M8033 is
ON.
Does not
Cleared.
change.
Does not change while M8033 is
ON.
Does not
Cleared.
change.
Does not change while M8033 is
ON.