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

3 SPECIFICATIONS

3.3 Buffer Memory

3.3.1 List of Buffer Memory

Address
DEC HEX
0 to 3 0 to 3
H H
4 to 7 4 to 7
H H
8 to 11 8 to B
H H
12 to 15 C to F
H H
16 10
H
17 11
H
18 12
H
19 13
H
20 14
H
21 to 31 15 to 1F
H H
32 20
H
to to
95 5F
H
96 to 60 to
H
* Do not write to the prohibited area. Doing so may cause an error.

3.3.2 Details of Buffer Memory

Address (Decimal)
0 Station No.16
1 Station No.32
2 Station No.48
3 Station No.64
0: No remote station connected
1: Remote station connected
3 - 6
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.
The list of the buffer memory is shown in Table 3.7.
Table 3.7 List of Buffer Memory
Information of remote station connection
Information of faulty station
Remote I/O error information
Prohibited*
Detailed error information
External switch information
Information of operating states
Data link stop/restart instructions
Information of last station of data link
Prohibited*
Detailed remote station information (Station No. 1)
Detailed remote station information (Station No.64)
Prohibited*
This section describes the details of each item given in Table 3.7 in Section 3.3.1.
(1) Information of remote station connection (Buffer memory address 0
- 3: Un\G0 – 3)
The remote stations connected to the line are detected and the information on
the connection condition is stored in this area.
b15 b14
Station No.15
Station No.31
Station No.47
Station No.63
Item
to
b13 to
Station No.14 to
Station No.30 to
Station No.46 to
Station No.62 to
Availability
Read only
Read only
Read only
Readable/Writable
Read only
Read only
Writable
Read only
Read only
b2 b1
Station No.3 Station No.2
Station No.19 Station No.18 Station No.17
Station No.35 Station No.34 Station No.33
Station No.51 Station No.50 Station No.49
MELSEC-Q
Reference
Sec.3.3.2 (1)
Sec.3.3.2 (2)
Sec.3.3.2 (3)
Sec.3.3.2 (4)
Sec.3.3.2 (5)
Sec.3.3.2 (6)
Sec.3.3.2 (7)
Sec.3.3.2 (8)
Sec.3.3.2 (9)
b0
Station No.1
3 - 6