Buffer Memory Configuration - Mitsubishi MELSEC-A AD57G-S3 User Manual

3. SPECIFICATIONS
MELSEC-A
3.5
Buffer Memory Configuration
The buffer is used for storing (a) monitor data of the AD57G, and (b) data
input from the operation and touch panels.
One buffer address consists of 16 bits. Data stored to the buffer can be read
by using a FROM instruction in the sequence program.
The following table gives the names and contents of each buffer address:
Address Name ReadIWrlte Initial Value
0
AD57G error code storage area
0 ,
Displayed screen No. storage area
0
2 0
3
0
Key input data storage area
4 0
5
Read only 0
6 Current cursor location storage area
0
7
Previous cursor location storage area
0
8
to
(Unused)
0
59
When the AD57G buffer is read using a FROM instruction in the sequence
program, specify the AD57G I/O number used for the FROM instruction as
follows:
(
AD57G head input number 1 )
(the first two digits when expressed in three digits) +
Example: When the AD57G head input number is
"XjY20":
•
I
Readi1n g condition
Reads error code
•
POINTI
The AD57G buffer is only used for reading.
If data is written to the buffer, an AD57G system error occurs (but
monitoring continues).
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