1-63
Section 1 Specifications
1-10 Writing/Reading Data to/from Memory Pack
You can write/read data of the data memory (standard memory and retain memory) to/from a memory pack (Type: NA8PMF-20)
that is mounted on a main unit.
•
A memory pack has three areas for writing data.
(The size of the data storage area 1 and 2 is 4K words each, and the size of the data storage area 3 is 8K words.)
•
Use the parameters assigned to the special registers to issue a write/read command.
Memory pack
(NA8PMF-20)
Reading
Writing (Note)
Data memory
• Standard memory (M)
• Retain memory (M)
Special register
(Parameter)
Write/Read command
Data storage area 1
(4K Words)
Data storage area 2
(4K Words)
Data storage area 3
(8K Words)
Notes:
Even if the protect switch of the memory pack is set to on, data can be written in the memory pack.
<Special register>
Address
Name
Description
%MW3.61440
Parameter for data storage
area 1 of memory pack
Data memory type (1: Standard memory, 3: Retain memory)
%MW3.61441
• Data memory start address of data to be written
• Data memory start address to store read data
%MW3.61442
Number of words to write/read (Note 1)
%MW3.61443
Request command
%MW3.61444
Operation status
%MW3.61445
Actual number of written/read words
%MW3.61448
|
%MW3.61453
Parameter for data storage
area 2 of memory pack
Same as “Parameter for data storage area 1”
%MW3.61456
|
%MW3.61461
Parameter for data storage
area 3 of memory pack
Same as “Parameter for data storage area 1”
1514
0
Request type
5754h: Write request
5244h: Read request
Request bit
1: Request issued, 2: No request
f
Bit address
15141312 11
8 7
0
Error code
Executing
f
Bit address
Abnormal end
Normal end (Note 2)
