[D2]
Specification of
writing format
Num
ber of
digits
Zero suppression: ON Zero suppression: OFF
7 HEX 1-word 4 ␣␣␣ 0 0000
8 HEX 2-word 8 ␣␣␣␣␣␣␣ 0 00000000
9 HEX 4-word 16 ␣␣␣␣␣␣␣␣␣␣␣␣␣␣␣ 0 0000000000000000
(Note 1) "␣" in the table represents a space (H20).
■
[D2+3], [D2+4]: Specification of write position (file pointer)
(32H)
2
(31H)
1
(22H)
“
(2CH)
,
(22H)
“
(64H)
d
(63H)
c
(62H)
b
(61H)
a
(22H)
“
(2CH)
,
(22H)
“
(45H)
E
(44H)
D
(43H)
C
(42H)
B
(41H)
A
(22H)
“
(2CH)
,
(35H)
5
(34H)
4
(33H)
3
(20H)(20H)(2CH)
,
(33H)
3
(32H)
2
(20H)(20H)(20H)(2CH)
,
(31H)
1
(20H)(20H)(20H)(20H)
FFFF015900170001DDD511D7015900170001
1110FEDCBA9876543210 12
Writing position
(File pointer)
16-bit integer
bin. format
16-bit integer
csv. format
ASCII
csv. format
● The writing position (file pointer) is specified in hexadecimal format in bytes.
● The file pointer setting is available only when the writing position specification mode1 or
mode 2 is specified.
● After the writing process into the file, the position of the end of written data is stored at the
writing position (file pointer). If the writing operation is performed again in this state, the next
data will be written.
● In case of the writing position specification mode 1, data is written in the file from the writing
position (file pointer) counted from the head of the file.
● In case of the writing position specification mode 2, data is written in the file from the writing
position (file pointer) counted from the end of the file.
● In the new file mode, data is always written from the head of a file. The writing position (file
pointer) after the writing process is not stored.
● In the add mode, data is always written from the end of a file. The writing position (file
pointer) after the writing process is not stored.
● The writing position is specified by one byte.
■
Example of processing (csv format file)
Example 1)
● Five pieces (five words) of unsigned 16-bit integer data are read from the area starting with
device DT2, and the data pieces are written in CSV format into the file "\abc\data1.csv" in the
SD memory card in new file mode.
● A blank line is inserted in the data through zero suppression, and a comma (2Ch) is inserted
at the end.
18.3 CWT (File Data Write Instruction)
WUME-FP7CPUPGR-12 18-11