Omron CJ1G-CPU series, Programming Manual

Page: 238 / 383

217
Manipulating Files Section 5-2
Related Auxiliary Bits/Words
5-2-6 Simple Backup Function
This function is not supported by CS-series CS1 CPU Units that are pre-EV1.
Backing Up Data from the CPU Unit to the Memory Card
To backup data, turn ON pin 7 on the CPU Unit’s DIP switch, press and hold
the Memory Card Power Supply Switch for three seconds. The backup func-
tion will automatically create backup files and write them to the Memory Card.
The backup files contain the program, parameter area data, and I/O memory
data. This function can be executed in any operating mode.
Restoring Data from the Memory Card to the CPU Unit
To restore the backup files to the CPU Unit, check that pin 7 is ON and turn
the PLC’s power OFF and then ON again. The backup files containing the
program, parameter area data, and I/O memory data will be read from the
Memory Card to the CPU Unit.
Note 1. The backup function will override the automatic transfer at startup function,
so the backup files will be read to the CPU Unit when the PLC is turned ON
even if pin 2 of the DIP switch is ON.
2. Data will not be read from the Memory Card to the CPU Unit if pin 1 of the
DIP switch is ON (write-protecting program memory).
3. When the backup files are read from the Memory Card by the backup func-
tion, the status of I/O memory and force-set/force-reset bits will be cleared
unless the necessary settings are made in the Auxiliary Area and PLC Set-
up.
If the IOM Hold Bit (A50012) is ON and the PLC Setup is set to maintain
the IOM Hold Bit Status at Startup when the backup files are written, the
Name Address Setting
Memory Error Flag
(Fatal error) A40115 ON when an error occurred in memory or there was an error in automatic
transfer from the Memory Card when the power was turned on (automatic
transfer at start-up).
The CPU Unit will stop and the ERR/ALM indicator on the front of the CPU
Unit will light.
Note: A40309 will be turned ON if the error occurred during automatic trans-
fer at startup. (The error cannot be cleared in this case.)
Memory Card Start-up
Transfer Error Flag A40309 ON when automatic transfer at start-up has been selected and an error
occurs during automatic transfer (DIP switch pin 2 ON). An error will occur if
there is a transfer error, the specified file does not exist, or the Memory Card
is not installed.
Note: The error can be cleared by turning the power off. (The error cannot
be cleared while the power is on.)
Pin 7: ON
Memory Card
Press and hold the
Memory Card Power
Switch for three seconds.
(This example shows a
CS-series CPU Unit.)