Omron SYSMAC CJ1W-PRM21, Operation Manual

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162
Memory Card Backup Functions
Appendix C
C-3 Restoring Unit Setup Files
In order to restore the Unit’s parameter sets from the Memory Card mounted to the CPU Unit, perform the fol-
lowing procedure.
1. Power down the PLC and insert a Memory Card in to the Card slot.
2. Turn ON pin 7 of the DIP switch on the front of the CPU Unit (behind the cover above the Memory Card slot).
3. Turn ON the PLC’s power supply.
4. When the PLC’s power is turned ON, the MCPWR Indicator on the front of the CPU Unit will light and flash
once. The MCPWR Indicator will remain lit while the data is being read. The Indicator will go OFF after the
data has been read properly. During the Data Transfer, the PRM LED on the front of the Unit will flash, and
the Parameter Transfer in Progress bit in Unit Status Word (CIO Word n+4) will turn ON.
5. Restart the PLC.
Note 1. 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).
2. A CS1-H, CJ1-H, or CJ1M CPU Unit will remain in PROGRAM mode after the simple backup opera-
tion has been performed and cannot be changed to MONITOR or RUN mode until the power supply
has been cycled. After completing the backup operation, turn OFF the power supply to the CPU Unit,
change the settings of pin 7, and then turn the power supply back ON.
6. File backups may take from several seconds to several minutes. Refer to
CS/CJ-series Programming
Manual (W394) for information on execution times.
7. If an error occurred in the transfer from the Memory Card to the Unit, the File Read Error bit in Unit
Status Word (CIO Word n + 4, bit 09) will turn ON. To correct this, re-perform the Restore action. If
the problem persist, use CX-Profibus to download the original settings from the PC.