Omron NJ501-1400 User Manual page 90

3 Configuration Units
Indicator
SD PWR Green
SD BUSY Yellow
Precautions for Safe Use
• Do not turn OFF the power supply to the Controller while the BUSY indicator flashes. While
the BUSY indicator is lit, the user program and settings in the CPU Unit are being backed up in
the built-in non-volatile memory. The data will not be backed up if the power supply is turned
OFF. The next time that the Controller is started, a Controller error in the major fault level will
occur and operation will stop.
• Do not turn OFF the power supply or remove the SD Memory Card while SD Memory Card
access is in progress (i.e., while the SD BUSY indicator flashes). Data may become corrupted,
and the Controller will not operate correctly if it uses corrupted data. To remove an SD Memory
Card from the CPU Unit when power is supplied to the CPU Unit, press the SD Memory Card
power supply switch and wait for the SD PWR indicator to turn OFF before you remove the SC
Memory Card.
3-6
Color Status
Lit Power is being supplied to the SD Memory Card and the SD
Memory Card can be used.
Flashing ---
Not lit The power supply for the SD Memory Card is stopped, an SD
Memory Card is not mounted, or the file format of the mounted
SD Memory Card is not supported.
Lit SD Memory Card access in progress.
Not lit SD Memory Card access not in progress
Meaning
NJ-series CPU Unit Hardware User's Manual (W500)