Commands And Contents Of Character Area - Mitsubishi MELSEC Q Series Reference Manual

3.7.1 Commands and contents of character area

—
Command
(subcommand)
Function
Memory usage
0205 (0000)
status read
Memory
1207 (0000)
defragmentation
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3 WHEN COMMUNICATING USING THE QnA COMPATIBLE 3E/3C/4C FRAMES OR 4E FRAME
This section explains the commands used and the character area (data section in
communication in binary code) in the control procedure used to defragment the drive
memory.
(1) Commands
Processing
Reads the cluster usage status of the
driver
Increases the contiguous free area by
defragmenting the drive memory.
(2) Contents of character area
The following explains what is included in the character area when an external
device instructs the QnACPU to defragment the drive memory.
(a) Keyword
Character string (maximum 6 characters) registered to the designated drive
by the user. This data allows/prohibits access to that drive.
When a keyword has already registered, designate the same keyword.
1) Data communication in ASCII code
The keyword registered in the designated drive is transmitted as it is.
2) Data communication in binary code
The keyword registered in the designated drive is converted to a 3-
byte binary code and sequentially transmitted beginning from the low
byte (L: bits 0 to 7).
(Example)
Registered keyword
"012345"
"012300"
3) The key words of the character area are as follows when a keyword is
not registered in the designated drive.
• In data communication in ASCII code
• In data communication in binary code
Number of points
processed per
communication
Access station-2
(QnACPU described in
Section 3.2
(For 256 clusters)
(For one station)
in the programmable controller CPU status column above indicates that execution is possible.
Values converted to binary
code
01 , 23 , 45
H H
01 , 23 , 00
H H
Programmable controller CPU
status
During RUN
During
Write
STOP
enabled
8
)
Transmission order
45 , 23 , 01
H H H H
00 , 23 , 01
H H H H
"000000"
00 , 00
H
Reference
Write
disabled
Section 3.7.2
Section 3.7.3
Remarks
Sequentially transmitted
beginning from 45 .
H
Sequentially transmitted
beginning from 00 .
H
, 00
H H
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