List Of System-Defined Variables Related To Sd Memory Cards - Omron NJ-series User Manual

8 CPU Unit Functions
When the end of the life of the SD Memory Card is detected, save the data on the SD Memory Card
and replace the SD Memory Card.
8-3-8

List of System-defined Variables Related to SD Memory Cards

The following system-defined variables show the status of the SD Memory Card.
Variable name
_Card1Ready
_Card1Protect
_Card1Err
_Card1Access
_Card1Deterior
ated
_Card1PowerF
ail
*1 Precaution When Using SD Memory Card Access Flag (_Card1Access)
The SD Memory Card Access Flag is intended for use in notifying external devices. The status of access to the
SD Memory Card is not updated in realtime. Because of this, do not use the flag in the user program. Because
the status of access to the SD Memory Card is not shown in realtime, it may cause unexpected Controller
operation if you use it in the user program.
*2 Precautions When Using the SD Memory Card Power Interruption Flag ( _Card1PowerFail)
If the SD Memory Card Power Interruption Flag is TRUE, check to see if the correct file is in the SD Memory
Card and to see if the SD Memory Card operates properly. If the correct file is missing or the SD Memory Card
does not operate properly, download the correct file to the SD Memory Card again. Cycle the power supply to
the Controller or reset the Controller, and then see if the SD Memory Card operates properly. When you are
finished, change SD Memory Card Power Interruption Flag to FALSE. (_Card1PowerFail does not change to
FALSE automatically.)
Note Refer to 9-2 SD Memory Card Backups for the system-defined variables that are used with the SD Memory
Card backup function.
8-14
Meaning
SD Memory TRUE when the SD Memory Card is recognized. It is FALSE when
Card Ready an SD Memory Card is not recognized.
Flag
TRUE: The Card can be used.
FALSE: The Card cannot be used.
SD Memory TRUE when the SD Memory Card is write-protected.
Card Write
TRUE: Write protected.
Protected
FALSE: Not write protected.
Flag
SD Memory TRUE when an unusable SD Memory Card is inserted or a format
Card Error error occurs.
Flag
TRUE: There is an error
FALSE: There is no error
SD Memory TRUE during SD Memory Card access.
Card Access
TRUE: Card is being accessed.
*1
Flag
FALSE: Card is not being accessed.
SD Memory TRUE when the end of the life of the SD Memory Card is detected.
Card Life
TRUE: The end of the life of the Card is detected.
Warning Flag
FALSE: The end of the life of the Card was not detected.
SD Memory TRUE when the power supply to the Controller was interrupted dur-
Card Power ing access to the SD Memory Card.
Interruption
TRUE: Power was interrupted during SD Memory Card access.
*2
Flag
FALSE: Operation is normal.
Description
NJ-series CPU Unit Software User's Manual (W501)
Data
type
BOOL
BOOL
BOOL
BOOL
BOOL
BOOL