Specifications

3 - 17
3.5 Buffer Memory
The QD75’s buffer memory provides addresses ranging from 0 to 30099. By reading or
writing data from or to them using a sequence program, highly precise control is
realized.
3.5.1 Buffer memory configuration
The following shows the entire configuration of the buffer memory.
Table 3.4 Buffer memory configuration
Address Area by use Power on Writing condition
0 to 15 Basic parameter 1·2
17 to 62
Detailed parameter 1·2
70 to 89
OPR parameter
For axis 1
150 to 165
Basic parameter 1·2
167 to 212
Detailed parameter 1·2
220 to 239
OPR parameter
For axis 2
300 to 315
Basic parameter 1·2
317 to 362
Detailed parameter 1·2
370 to 389
OPR parameter
For axis 3
450 to 465
Basic parameter 1·2
467 to 512
Detailed parameter 1·2
520 to 539
OPR parameter
For axis 4
Parameter area
The parameter
value in flash
ROM is
transferred.
Can be written at any time
(1) For basic parameter 1,
detailed parameter 1 and
OPR basic/detailed
parameters, data written
from PLC CPU becomes
valid at the raising edge
of the PLC READY signal
(OFF
ON).
(2) Basic parameter 2 and
detailed parameter 2
become valid when
written from PLC CPU.
During positioning
control, however, they
are changed with
maximum 3 data delayed
from the positioning data
No. which were executed
when they were written.
800 to 847
Axis monitor for axis 1
900 to 947
Axis monitor for axis 2
1000 to 1047
Axis monitor for axis 3
1100 to 1147
Axis monitor for axis 4
1200 to 1425
System monitor
Monitor data area Initialization Read-only
1500 to 1599
Axis Control data for axis 1
1600 to 1699
Axis control data for axis 2
1700 to 1799
Axis control data for axis 3
1800 to 1899
Axis control data for axis 4
1900 to 1901
System control data
Control data area Initialization
2000 to 7999
Positioning data for axis 1
8000 to 13999
Positioning data for axis 2
14000 to 19999
Positioning data for axis 3
20000 to 25999
Positioning data for axis 4
Positioning data
area
(No.1 to No.600)
The data in
flash ROM is
transferred.
26000 to 26999
Block start data for axis 1
(including condition data)
27000 to 27999
Block start data for axis 2
(including condition data)
28000 to 28999
Block start data for axis 3
(including condition data)
29000 to 29999
Block start data for axis 4
(including condition data)
Block start data
area
(Block No. 7000
to No.7004)
The data in
flash ROM is
transferred.
Can be written at any time
Except positioning
data during starting up
30000 to 30099
PLC CPU memo area CPU memo area Initialization Reading/writing
* Use of the address Nos. skipped from the above is prohibited.
If used, the system may not operate correctly.