Mitsubishi MELSEC Q Series Reference Manual page 224

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3 WHEN COMMUNICATING USING THE QnA COMPATIBLE 3E/3C/4C FRAMES OR 4E FRAME
(c) Drive name and number
This data section designates the drive of the Q/L/QnACPU whose files are
to be controlled.
Refer to Section 3.7.1 for how to designate drive names for QnACPUs and
their corresponding drives.
How to designate drive names for Q/LCPUs and their corresponding drives
are described here.
1) Data communication in ASCII code
The following values indicating drives to be accessed are converted to
4-digit (hexadecimal) ASCII code and transmitted sequentially
beginning from the most significant digit ("0").
2) Data communication in binary code
The following 2-byte values indicating drives to be accessed are
sequentially transmitted beginning from the low byte (L: bits 0 to 7).
3) The following drive numbers and target drives can be designated; other
designations are not allowed.
< For QCPU (Excluding the QnUDVCPU)/QnACPU >
Designated value
0000 Program memory
H
0001 SRAM card
H
0002 Flash card, ATA card
H
< For QnUDVCPU/LCPU >
Designated value
0000 Program memory
H
0001
H
0002 SD memory card
H
(d) File number
This value designates the registration number when a file designated by
filename and extension as described below was registered (written) to the
programmable controller CPU, or the registration number when registering
to the programmable controller CPU.
1) Data communication in ASCII code
The file numbers shown below are converted to a 4-digit
(hexadecimal) ASCII code and sequentially transmitted beginning from
the most significant digit.
(Example)
File number 1F
2) Data communication in binary code
A 2-byte value indicating the file number shown below is sequentially
transmitted from the low byte (L: bits 0 to 7).
(Example)
File number 1F
3) The file numbers shown below can be designated.
Designated value
01 to 100 File number
H H
FFFF File number unknown
H
Target drive Designated value
Target drive Designated value
–
: It is converted to "001F" and sequentially
H
transmitted beginning from the first "0".
: The value 001F is transmitted in the order of 1F
H
first, and then 00
Contents
Target drive
0003 Standard RAM
H
0004 Standard ROM
H
– –
Target drive
0003 Standard RAM
H
0004 Standard ROM
H
– –
.
H
Designation
Designate when the file number is known.
Designate this when requesting the
C24/E71 to search for file numbers.
(Read/write request from the C24/E71 to
the programmable controller CPU will be
delayed for more than one sequence scan
time.)
H
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