8 Backup Operations
8-8
CJ2 CPU Unit Hardware User’s Manual
1. Insert the Memory Card into the CPU Unit. The MCPWR indicator will light and the BUSY indica-
tor will flash (meaning the Memory Card is being accessed) and then turn OFF.
2. Turn ON pin 7 on the CPU Unit's DIP switch.
3. Press the Memory Card Power Switch for three seconds until the BUSY indicator lights, and then
release the switch.
The PLC will start backing up data to the Memory Card. The MCPWR indicator will flash once
and then light while the data is being written. At the same time the BUSY indicator will flash. The
MCPWR and BUSY indicators will both turn OFF when the operation is completed normally.
4. Turn OFF pin 7 on the CPU Unit's DIP switch.
1. Turn OFF the PLC power supply.
2. Insert the Memory Card containing the backup files into the CPU Unit.
3. Turn ON pin 7 on the CPU Unit's DIP switch.
4. Turn ON the PLC power supply.
The PLC will start restoring the data from the Memory Card. The MCPWR indicator will flash
once and then light while the data is being read. At the same time the BUSY indicator will flash.
The MCPWR and BUSY indicators will both turn OFF when the operation is completed normally.
If the MCPWR indicator flashes five times, or if only the BUSY signal turns OFF, it means that an
error has occurred. (Refer to 8-3-3 Verifying Backup Operations with Indicators.)
5. Turn OFF pin 7 on the CPU Unit's DIP switch.
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-protect-
ing program memory).
8-3-2 Operating Procedures
Backing Up Data from the CPU Unit to the Memory Card
Restoring Data from the Memory Card to the CPU Unit
Memory Card
Press the Memory
Card Power Switch
for three seconds.
Pin 7: ON
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