Mitsubishi Electric MELSEC-I/OLINK Handbook page 33

5
PROGRAMS COMPARISONS
(2) Buffer memory of the AnyWire DB A20
In the MELSEC-I/OLINK, the occupied XY address of the master module becomes the XY
address of the remote station module, while in the AnyWire DB A20, the ON/OFF information of a
slave module is stored in the buffer memory. Therefore, the address of the slave module in the
program will be the device or the device number used the FROM/TO instruction which data are
read from and written to the buffer memory.
This area is for data communication between the master module and CPU module.
Buffer memory address
*1
100 to 13F
H H
*1
1100 to 113F
H H
2000
H
2001 to 2080
H H
*2
2400
H
*2
2401 to 2480
H H
*2
2810
H
*2
2811
H
*1 The buffer memory address occupies a 64-word sized area, irrespective of the number of I/O points.
*2 The QJ51AW12D2 with a serial number where the sixth digit is "6" or later can be used.
Correspondence between the buffer memory address and AnyWire DB A20 input address
Ex.
Buffer memory address
100
H
101
H
For details, refer to the following manual.
MELSEC-Q/L AnyWire DB A20 Master Module User's Manual SH(NA)-080968ENG
Input (1024 points): The least significant bit of 100
data.
Output (1024 points): The least significant bit of 1100
1023rd data.
Number of error IDs (1 word)
Error ID information
Number of connection IDs (1 word)
Connection ID information
Latest error code storage area
Latest error ID storage area
Bit No.
15 14 13 12 11
15 14 13 12 11
31 30 29 28 27
Description
is the 0th data, and the most significant bit of 13F
H
is the 0th data, and the most significant bit of 113F
H
10 9 8 7 6 5
10 9 8 7 6 5
26 25 24 23 22 21
is the 1023rd
H
is the
H
4 3 2 1 0
4 3 2 1 0
20 19 18 17 16
AnyWire input address: 0
5
- 6