Omron CJ - PROGRAMMING MANUAL 12-2009 Programming Manual page 292

Manipulating Files
Note
Precautions When
Changing the I/O
Allocation Status During
Backup/Restore
Operations
Source CPU Unit
Unit version of Pre-Ver. 2.0
CPU Unit at the
backup source
Unit Ver. 2.0
Unit Ver. 3.0 or
later
252
Note When the CS1W-SCU21-V1 is being used, the time required for a simple
backup operation will be longer than when the CS1W-SCU21-V1 is not being
used by the times given in the following tables.
Additional Time when the CPU Bus Unit Settings File (BACKUP@@.PRM)
on the Memory Card Is 60 Kbytes
Operating Additional time
mode when writing to a
Memory Card
PROGRAM Approx. 25 s
RUN Approx. 1 min 30 s
Additional Time when the CPU Bus Unit Settings File (BACKUP@@.PRM)
on the Memory Card Is 128 Kbytes
Operating Additional time
mode when writing to a
Memory Card
PROGRAM Approx. 40 s
RUN Approx. 2 min 30 s
1. Confirm that the Units and Boards that are being backed up are running
properly before attempting the above operations. The write, read, and
compare operations will not be performed unless the Units and Boards are
running properly.
2. Before performing a simple backup operation for specific Units/Boards,
make sure either that the CPU Unit is in PROGRAM mode or that perform-
ing the simple backup operation will not adversely affect instructions that
use communications port numbers. When data is backed up from specific
Units/Boards, a communications port will be searched for beginning from
port 0 and the first available port will be used. If the port number is the
same as one used by a network communications instruction, the network
communications instruction will not be executed until the simple backup
operation has been completed.
The I/O allocation status depends on the unit versions of the source and des-
tination CPU Units when using a single CJ-series CPU Unit to create backup
parameter files (BKUP.STD), save them in the Memory Card, and then back
up or restore them to another CJ-series CPU Unit. The changes to I/O alloca-
tion status for different unit version combinations are shown in the following
table.
Original I/O
allocation status
Automatic alloca-
tion
User-specified
Automatic alloca-
tion
User-specified
Automatic alloca-
tion
User-specified
Additional time
when verifying a
Memory Card
Approx. 10 s
Approx. 30 s
Additional time
when verifying a
Memory Card
Approx. 14 s
Approx. 1 min
Destination CPU Unit
Unit version of CPU Unit at the backup/restore
destination
Pre-Ver. 2.0 Unit Ver. 2.0
(Same) automatic allocation
(Same) User- (Same) automatic
specified allocation
(Same) automatic allocation
(Same) User-specified
(Same) automatic allocation
(Same) User-specified
Section 5-2
Additional time
when reading from a
Memory Card
Approx. 4 s
Approx. 4 s
Additional time
when reading from a
Memory Card
Approx. 8 s
Approx. 8 s
Unit Ver. 3.0 or
later
(Same) User-
specified