Mitsubishi Electric MELSEC Q Series User Manual page 104

5
PRE-OPERATION PROCEDURES
Increasing the data size of
QCPU
W0
5 words
Empty
W10
9 words
Empty
W20
7 words
Configure the auto refresh settings
providing some empty areas.
5
- 3 5.2 Pre-Operation Procedures
5.2.1 Consideration before configuring the EtherNet/IP network
Program modification steps can be reduced by configuring the system as shown
below even when the data size is changed for system expansion or some other
purposes.
The following is an example of increasing the data size of Tag No.1 from 5 words to 10
words.
(a) Setting auto refresh for each tag
Configure the auto refresh settings providing some empty areas as shown in the
Figure 5.3 so that no change is required on the settings even when the tag data
size is changed.
In addition, the existing device numbers are not changed.
The sequence program can be modified only by changing the read or write data
size of Tag No.1.
EtherNet/IP
module
U0\G0
5 words
Tag No.1
U0\G5
Tag No.2
9 words
U0\G14
Tag No.3
7 words
Figure 5.3 Setting auto refresh for each tag
from 5 words to 10 words
QCPU
W0
10 words
Empty
W10
9 words
Empty
W20
7 words
Program modification steps can
be reduced since the existing device
numbers are not changed.
EtherNet/IP
module
U0\G0
10 words
U0\G10
9 words
U0\G19
7 words