Related Auxiliary Bits/Words; Time Required For Simple Backup; Data Backed Up Using Simple Backup - Omron CJ2 CPU UNIT User Manual

8 Backup Operations
8-3-4

Related Auxiliary Bits/Words

Name
File Memory
Operation Flag
EM File Memory
Starting Bank
8-3-5

Time Required for Simple Backup

The following tables list the benchmark execution times for the simple backup operation. The execution
time will depend on the Unit configuration, cycle time, and Memory Card. These times were measured
under the following conditions:
CPU Unit Model: CJ2H-CPU6@-EIP or CJ2M-CPU3@
Configuration: CPU Unit only
Operating mode: PROGRAM
User program: 120K steps, No network symbols (tags)
User program: 120K steps, 20,000 network symbols (tags)
Additional Information
The Units that are backed up for the simple backup operation are predetermined. You cannot
specify which Units are backed up and which are not.
8-3-6

Data Backed Up Using Simple Backup

The files and applicable data transferred between the Memory Card and CPU Unit using the simple
backup operation are listed below. The file name is fixed as BACKUP@@.
Program Files
Contents
• User program
• Network symbols
* CJ2H-CPU6@-EIP or CJ2M-CPU3@ only.
Program files that include network symbols cannot be transferred to the CJ2H-CPU6@ or CJ2M-CPU1@. A
Memory Card transfer error (fatal) will occur if an attempt is made to transfer such a file.
8-12
Address
A343.13 ON when any of the following are being performed. OFF when execu-
tion 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 pos-
sible while this flag is ON.
A344 When the CPU Unit starts reading from the Memory Card, it references
this value. If the maximum EM bank number of the BKUPEM@.IOM
files (maximum consecutive bank number counting from 0) matches the
maximum 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.
Operating mode
Backup
Yes
*
Description
Writing to Memory Card
Approx. 7 s
Approx. 19 s
Restore Compare
Yes Yes
Reading from Memory Card
Approx. 20 s
Approx. 68 s
File name Extension
BACKUP .OBJ
CJ2 CPU Unit Hardware User's Manual