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Manipulating Files Section 5-2
Related Auxiliary Bits/Words
Note When a simple backup operation is performed, an available communications
port will be automatically found and used. These network communications
flags and words are thus related. The CS1G/H-CPU@@(-V1) and CJ1@-
CPU@@ CPU Units do not support the Unit/Board backup function, so they do
not use these Auxiliary Area words and flags.
Backing Up Board and Unit Data to Memory Cards
The following data in the CPU Unit is backed up by the simple backup opera-
tion: the user program, parameter area, and all of the data areas in I/O mem-
ory. The simple backup operation also backs up data from certain Special I/O
Units, CPU Bus Units, and Inner Boards mounted to the PLC.
The data in each Unit or Board is backed up separately for each Unit or
Board.
Note The CS1G/H-CPU@@(-V1) and CJ1@-CPU@@ CPU Units do not support the
Unit/Board backup function.
Name Address Description
File Memory Operation Flag A34313 ON when any of the following are being performed. OFF when execution
has been completed.
• Memory Card detection
• CMND instruction executed for local CPU Unit
• FREAD/FWRIT instructions
• Program replacement via special control bits
• Simple backup operation
Wiring data to or verifying the contents of the Memory Card is not possi-
ble while this flag is ON.
EM File Memory Starting Bank A344 When the CPU Unit starts reading from the Memory Card, it references
this value. If the maximum EM bank number of the BACKUPE@.IOM files
(maximum consecutive bank number counting from 0) matches the maxi-
mum bank number of the CPU Unit, the EM area will be formatted based
on the value in this word. If the maximum EM bank numbers do not
match, the EM Area will revert to its unformatted condition.
Network Communications
Instruction Enabled Flags (See
note.)
A20200 to
A20207
• Turns OFF when writing or comparing Memory Card data begins.
• Turn ON when writing or comparing Memory Card data has been com-
pleted.
Unit and Board data cannot be written or compared if all of the Network
Communications Instruction Enabled Flags are OFF when Memory Card
write or compare operations are started and an error will occur if this is
attempted.
Network Communications Com-
pletion Code (See note.)
A203 to
A210
Provide the results of communications with the Unit or Board when Mem-
ory Card write or compare operations are performed.
Network Communications Error
Flags (See note.)
A21900 to
A21907
• Turns ON is an error occurs in communications with the Unit or Board
when Memory Card write or compare operations are performed.
• Remains OFF (or turns OFF) is no error occurs in communications with
the Unit or Board when Memory Card write or compare operations are
performed.
Simple Backup Write Capacity
(See note.)
A397 Provides the data capacity in Kbytes that would be required on the Mem-
ory Card when writing fails for a simple backup operation, indicating that
a write error occurred because of insufficient capacity.
0001 to FFFF Hex: Write error (Indicates required Memory Card capacity
between 1 and 65,535 Kbytes.) (Cleared to 0000 Hex when successful
write is performed.)
0000 Hex: Write completed normally.
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