Mitsubishi MELSEC Q Series Reference Manual page 271

(Data name)
External device
side
(Example)
(Data name)
Programmable controller CPU side
(Example)
3 - 211
3 WHEN COMMUNICATING USING THE QnA COMPATIBLE 3E/3C/4C FRAMES OR 4E FRAME
(b) Reading the usage status of the memory card A (RAM area, drive name:
01 ) file number usage status while communicating in binary code.
H
Keyword valid
Fixed to 0000
H
(Refer to Section 3.7.1.)
L H L H L - H L
04 02 00 00 01 00 23 01 01
H H H H H H H H H
0204
H
Usage status of file No.1 to 8
POINT
When a drive memory that cannot store more than 256 files is designated, the file
numbers that correspond to the files which cannot be stored (exceeding 256 files)
becomes "in use" (bit: 1).
Memory card A
H
(Refer to Section 3.8.1.)
00
H
File No. usage status
(32 bytes)
to
D3 B9 7A 96
H H H H
Usage status of file No.249 to 256
1 The usage statuses
1
are shown in Section
3.8.1 (2) (q).
FF FF FF
H H H
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