3 - 22 3 - 22
MELSEC-Q
3 SPECIFICATIONS
(4) Buffer Memory Addresses
Addresses in buffer memory differ depending on whether they are designated by
the programmable controller CPU or by a BASIC program, and are as follows.
(a) If designated from the programmable controller CPU
If designated by the programmable controller CPU, addresses are in 1-
word units.
Also, buffer memory addresses are designated from 0
H to BFFH in
hexadecimal notation.
(b) If designated by a BASIC program
If designated by a BASIC program, addresses are in 1-byte units.
Also, buffer memory addresses are designated from 0
H to 17FFH in
hexadecimal notation.
Designated from the
programmable
controller CPU using
a FROM/TO command.
(1-word units)
Address designated by
GETMEM / PUTMEM
in a BASIC program.
(1-byte units)
Buffer Memory
Lower order 8 bits
Higher order 8 bits
17FC
H
17FDH
17FE
H
17FFH
BFEH
BFFH
0
H
1H
2
H
3H
0
H
1H
Lower order 8 bits
Higher order 8 bits
Lower order 8 bits
Higher order 8 bits
Lower order 8 bits
Higher order 8 bits
To Next Page
Loading...
