34
FX
3U
/FX
3UC
Series Programmable Controllers
Programming Manual - Basic & Applied Instruction Edition
2 Overview (Sequence Program)
2.6 Program Memory and Devices (Battery Backed)
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
3U
/FX
3UC
PLCs are
classified as shown below:
1) Types of program memory
2) Types of word device memory
*1.
Some devices are cleared when the PLC status switches from STOP to RUN.
→
For special data registers, refer to Chapter 36.
*2.
An optional memory cassette is required.
Item
Power OFF
Power
OFF
→
ON
STOP
→
RUN
RUN
→
STOP
Parameter
Does not change.
Sequence program
Does not change.
Comment
Can be secured by
parameter setting.
Does not change.
File register
Does not change.
Item
Power OFF
Power
OFF
→
ON
STOP
→
RUN
RUN
→
STOP
Data register (D)
General type
Cleared.
Does not
change.
Cleared.
Does not change while M8033 is
ON.
latched (battery
backed) type
Does not change.
File type
Does not change.
Special type
Cleared.
Set to initial
values.
*1
Does not change.
*1
Extension register (R)
latched (battery
backed) type
Does not change.
Extension file register
(ER)
*2
File type
Does not change.
Index register (V, Z)
V, Z
Cleared.
Does not change.
Timer present value
register (T)
For 100 ms
Cleared.
Does not
change.
Cleared.
Does not change while M8033 is
ON.
For 10 ms
Cleared.
Does not
change.
Cleared.
Does not change while M8033 is
ON.
Retentive type for 100 ms
Does not change.
Retentive type for 1 ms
Does not change.
Counter present value
register (C)
General type
Cleared.
Does not
change.
Cleared.
Does not change while M8033 is
ON.
latched (battery
backed) type
Does not change.
High speed type
Does not change.
Clock data
Present value
Does not change.
Содержание FX3U Series
Страница 1: ...PROGRAMMING MANUAL Basic Applied Instructions Edition FX3U FX3UC SERIES PROGRAMMABLE CONTROLLERS ...
Страница 2: ......
Страница 889: ......