Omron CVM1D, Operation Manual

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2. Reading and writing can be performed by a command from a host computer.
3. Reading and writing can be performed by using the simplified backup func-
tion. Refer to 2-4-3 Simplified Backup Function for details.
2-4-3 Simplified Backup Function
The user program, Extended PC Setup, and IOM/DM data can be backed up
from the CPU Unit to a Memory Card very simply without using a Programming
Device. The backup data in the Memory Card can be transferred back to the
CPU Unit later. (This method is provided as an easy way to backup and restore
data, but we still recommend that a Programming Device be used to verify the
data.)
Use the following procedure to prepare to backup data in the memory of the CPU
Unit to a Memory Card.
1, 2, 3... 1. Insert a Memory Card that is not write-protected and check to be sure the
available capacity is sufficient for the files that will be created.
2. Confirm that the Memory Card is not being accessed by file memory opera-
tions or from a Programming Device.
3. Turn OFF pin 5 on the CPU DIP switch.
4. In a duplex system, confirm that the CPU Unit is the active Unit.
Use the following procedure to prepare to transfer data on the Memory Card to
the memory of the CPU Unit.
1, 2, 3... 1. Insert the Memory Card and be sure that it contains the desired files.
2. Check the file checksums and sizes to be sure that they are correct.
3. Confirm that the CPU Unit is in PROGRAM mode.
4. Confirm that the Memory Card is not being accessed from a Programming
Device.
5. Turn ON pin 5 on the CPU DIP switch.
6. In a duplex system, confirm that the CPU Unit is the active Unit.
Pins 1 and 2 on the DIP switch are used to specify the files to be transferred. Set
pins 1 and 2 as shown in the following table.
Pin 1 Pin2 User program Extended PC Setup IOM/DM
OFF OFF Transferred. Transferred. Transferred.
OFF ON Transferred. Not transferred. Not transferred.
ON OFF Not transferred. Transferred. Not transferred.
ON ON Not transferred. Not transferred. Transferred.
File name
(See note.) BACKUP.OBJ BACKUP.STD IOM: BACKUP.IOM
DM: BACKUPDM.IOM
EM: BACKUPE*.IOM
(* = bank number)
Note Any files of the same name will be automatically overwritten when backing up to
Memory Card.
Data transfers are started by pressing the Memory Card power switch for 3 se-
conds. If the transfer ends normally, the Memory Card indicator will flash once
and will then go out when the transfer has completed. The time required will de-
pend on the about of data being transferred. If there is insufficient memory avail-
able on the Memory Card to back up the specified data or if the specified files are
not present on the Memory Card when restoring data, the Memory Card indica-
tor will flash 5 times and then go out.
Backing Up Data to a
Memory Card
Transferring Data Back to
CPU Unit Memory
Specifying Files
Starting and Confirming
Data Transfers
Memory Cards
Section 2-4