Memory Operations And Latched (Battery Or Eeprom Backed) Devices (Power On/Off And Run/Stop) - Mitsubishi Electric FX3G SERIES Programming Manual

FX /FX /FX Series Programmable Controllers
3G 3U 3UC
Programming Manual - Basic & Applied Instruction Edition
2.6.2 Memory operations and latched (battery or EEPROM backed) devices
(power ON/OFF and RUN/STOP)
1. Backup operation
The operations of the data memory, bit device memory and program memory in FX
as shown below:
1) Types of program memory
Parameter
Sequence program
Comment
File register
Special setting
Symbolic information
2) Types of word device memory
a) FX /FX
3U
Data register (D)
Extension register (R)
Extension file register
*5
(ER)
Index register (V, Z)
Timer present value
register (T)
Counter present value
register (C)
Clock data
*1. Symbolic information is supported in the FX
*2. The contents of the program memory and device values are not backed up correctly in FX
the battery voltage becomes lower than the holding voltage if a memory cassette is not attached.
*3. Device values are not backed up correctly when the battery voltage becomes lower than the holding voltage.
*4. Some devices are cleared when the PLC status switches from STOP to RUN.
*5. An optional memory cassette is required.
36
Item
Can be secured by
parameter setting.
*1
PLC
3UC
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
(battery backed)
Retentive type for 1 ms
(battery backed)
General type
Latched (battery
backed) type
High-speed type
(battery backed)
Present value
(battery backed)
Power
Power OFF
OFF→ON
Power
Power OFF
OFF→ON
Cleared.
Does not change.
Does not change.
Set to initial
Cleared.
*4
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.
/FX PLCs Ver. 3.00 or later.
3U 3UC
→ For special data registers, refer to Chapter 37.
2 Overview (Sequence Program)
2.6 Program Memory and Devices
/FX /FX PLCs are classified
3G 3U 3UC
STOP→RUN
*2
Does not change.
*2
Does not change.
*2
Does not change.
*2
Does not change.
*2
Does not change.
*2
Does not change.
STOP→RUN RUN→STOP
Does not change.
Does not change while M8033 is ON.
*3
*2
Does not change.
*3
Does not change.
Does not change.
Does not change while M8033 is ON.
Does not change.
Does not change while M8033 is ON.
*3
*3
Does not change.
Does not change while M8033 is ON.
*3
*3
*3
/FX
3U 3UC
RUN→STOP
Cleared.
*4
Cleared.
Cleared.
Cleared.
PLCs when