Buffer Memory; List Of Buffer Memory Areas; Details Of Buffer Memory Areas - Mitsubishi Electric MELSEC Q Series User Manual

3.3

Buffer Memory

The buffer memory is used for data communication between the QJ61CL12 and the CPU module and is read or written
by GX Developer or sequence programs.
When the system is powered off or the CPU module is reset, the contents of the buffer memory will return to the default
setting.
3.3.1
The following table lists the buffer memory areas of the QJ61CL12.
8 to 11
12 to 15
21 to 31
*1
3.3.2
This section describes the details of each item given in Page 28, Section 3.1.1.
(1) Remote station connection information (buffer memory address: 0 to 3 (Un\G0
to 3))
Remote stations on the network are detected, and connection status of the stations is stored.
Address
(decimal)
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List of buffer memory areas

Address
DEC HEX
0 to 3
0 to 3 Remote station connection information
H H
4 to 7
4 to 7
H H
8 to B
H H
C to F
H H
10
16
H
11
17
H
12
18
H
13
19
H
14
20
H
15 to 1F
H H
20
32 Detailed remote station information (Station No. 1)
H
to to
95 5F Detailed remote station information (Station No.64)
H
60 to
96 to
H
Do not write data to the use prohibited area. Doing so may cause errors.

Details of buffer memory areas

b15
0 Station No.16 Station No.15
1 Station No.32 Station No.31
2 Station No.48 Station No.47
3 Station No.64 Station No.63
search engine
Item
Faulty station information
Remote I/O error information
*1
Use prohibited
Detailed error information
External switch information
Operating status information
Data link stop/restart instruction
Data link last station information
*1
Use prohibited
to
*1
Use prohibited
b14 b13
Station No.14
Station No.30
Station No.46
Station No.62
CHAPTER 3 SPECIFICATIONS
Availability
Read-only Page 31, Section 3.3.2 (1)
Read-only Page 32, Section 3.3.2 (2)
Read-only Page 32, Section 3.3.2 (3)
⎯
Readable/
Page 32, Section 3.3.2 (4)
Writable
Read-only Page 33, Section 3.3.2 (5)
Read-only Page 33, Section 3.3.2 (6)
Write-only Page 33, Section 3.3.2 (7)
Read-only Page 34, Section 3.3.2 (8)
⎯
Read-only Page 34, Section 3.3.2 (9)
⎯
to b2 b1
to Station No.3 Station No.2
to Station No.19 Station No.18
to Station No.35 Station No.34
to Station No.51 Station No.50
0: No remote station connected
1: Remote station connected
3
Reference
⎯
⎯
⎯
b0
Station No.1
Station No.17
Station No.33
Station No.49
31