IDEC SmartAXIS FT9Z-1A01, User Manual

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5: S
PECIAL
F
UNCTIONS
5-56 S
MART
AXIS P
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ITE
U
SER
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S
M
ANUAL
FT9Y-B1378
SD Memory Card Status LED and SD Memory Card Status
The status LED turns on or flashes when the SD memory card is being formatted or during reading and writing.
Special Internal Relays for the SD Memory Card
The special internal relays (M8026 and M8027) turn on and off according to the installation status and the access state of the SD
memory card. Access to the SD memory card can be stopped by special internal relay M8076.
Note:
R/W is the abbreviation for read/write. R/W indicates that the relay can be read and written. R indicates that the relay can only be read. W
indicates that the relay can only be written.
Timing Chart
The special internal relays turn on and off according to the installation status and the access state of the SD memory card as
shown below.
SD memory card
status LED
SD memory card state Operation
On The standby state where the SD memory card can be written or read
The SD memory card
can be removed.
Slow flashing
(1 second interval)

While the SmartAXIS is recognizing the SD memory card

While the SmartAXIS is stopping the access due to SD memory card access stop
flag (M8076) turning on (slow flashing, then off)
Do not remove the SD
memory card.
Quick flashing
(100 millisecond interval)
Reading from or writing to the SD memory card
Off

When an SD memory card is not inserted

When an unsupported or unformatted SD memory card is inserted

When access to the SD memory card is stopped by SD memory card access stop
flag (M8076)

When the SmartAXIS is turned off
The SD memory card
can be removed.
Address Function Description Read/Write
M8026 SD Memory Card Status
This special internal relay turns on when the SD memory card has
been inserted into the SmartAXIS, the card has been recognized,
and the card is in a usable state. This special internal relay turns
off when the SD memory card is not inserted or when the SD
memory card is not recognized.
R
M8027 SD Memory Card Writing Flag
This special internal relay turns on when the SD memory card is
being accessed.
This special internal relay turns off when the access has finished.
M8076 SD Memory Card Access Stop Flag
When this special internal relay changes from off to on, access to
the SD memory card is stopped. Once the access to the SD
memory card is stopped, insert the card into the SmartAXIS again
to make it accessible.
R/W
Not
inserted
Inserted
ON
OFF
Card being
recognized
SD memory card inserted
SD memory card access state
SD memory card
access stop flag
SD memory card
status
Slow
flashing
M8076
Standby state
Reading /
Writing
Standby state
Access
stopping
Stop access
M8026
ON
OFF
ON
OFF
On
Quick
flashing
On
Slow
flashing
SD memory card
writing flag
M8027
ON
OFF
SD memory card
status LED