8-11
8 CPU Unit Functions
NJ-series CPU Unit Software User’s Manual (W501)
8-3 SD Memory Card Operations
8
8-3-2 Specifications of Supported SD Memory Cards, Folders, and Files
The NX-series Controllers support both SD cards and SDHC cards. However, operation was confirmed
only for the OMRON SD Memory Card given in the following table. Correct operation may not be possi-
ble if you use any other SD or SDHC card.
The system-defined variable _Card1Err (SD Memory Card Error Flag) changes to TRUE (observation
level) in the following cases.
• When there is a format error
If an error occurs, the SD PWR indicator on the front of the CPU Unit goes out, and accessing the SD
Memory Card will not be possible.
Character Restrictions
*1 You cannot begin volume label names with a space.
*2 Even if the computer supports multibyte characters (e.g., for Japanese), you cannot use them in the CPU Unit.
Subdirectory Levels
You can create up to 5 levels (example: f1/f2/f3/f4/f5/abc.txt)
8-3-2 Specifications of Supported SD Memory Cards, Folders, and
Files
SD Memory Card Specifications
Model Card type
Capacity
[GB]
Formatting
Number of
overwrites
Write protection
HMC-SD291 SD card 2 FAT16 100,000 over-
writes
You can write-protect the SD
Memory Card with a hardware
switch on the Card.
HMC-SD491 SDHC card 4 FAT32
Folder and File Specifications
Object
named by
user
Usable characters
Reserved
words
Multibyte
character
compatibility
Case sen-
sitivity
Maximum
size (without
NULL)
Volume label 0 to 9, A to Z, and a to z, as
well as % - _ @ ! ‘ ( ) ~= # & +
^ [ ] { } , . ; and single-byte
kana
*1
CON, PRN,
AUX,
CLOCK$,
NUL, COM0,
COM1,
COM2,
COM3,
COM4,
COM5,
COM6,
COM7,
COM8,
COM9, LPT0,
LPT1, LPT2,
LPT3, LPT4,
LPT5, LPT6,
LPT7, LPT8,
LPT9
Not sup-
ported.
*2
Case
insensitive
11 bytes
Directory
name
0 to 9, A to Z, and a to z, as
well as $ % ’ - _ @ ! ‘ ( ) ~= #
& + ^ [ ] { } , . ; and single-byte
kana
65 bytes
File name 65 bytes
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