No change
No change
No change
No change
Replaced in
step 1
No change
A61P
AJ71 LP21
A S
eri
es
I/O m
od
ul
e
A S
eri
es
I/O m
od
ul
e
A S
eri
es
I/O m
od
ul
e
Current configuration
Transitional step 1
Transitional step 2
Transition completed
A61P
AJ72 QLP25
R1 station
R2 station
R3 station
Master station
MELSECNET/10 remote I/O network (optical)
MELSECNET/10 remote I/O network (optical)
MELSECNET/10 remote I/O network (optical)
MELSECNET/10 remote I/O network (optical)
A61P
AJ72 QLP25 A S
eri
es
I/O m
od
ul
e
A S
eri
es
I/O m
od
ul
e
A S
eri
es
I/O m
od
ul
e
R3 station
A61P
AJ72 QLP25 A S
eri
es
I/O m
od
ul
e
A S
eri
es
I/O m
od
ul
e
A S
eri
es
I/O m
od
ul
e
A61P
AJ72 QLP25 A S
eri
es
I/O m
od
ul
e
R1 station
R2 station
R3 station
Q61P
QJ72 LP25-25
Q S
er
ies
I/O m
od
ule
Q S
er
ies
I/O m
od
ule
Q S
er
ies
I/O m
od
ule
Set Mode to 8
R1 station
Q61P
QJ72 LP25-25
Q S
er
ies
I/O m
od
ule
Q S
er
ies
I/O m
od
ule
Q S
er
ies
I/O m
od
ule
Set Mode to 8
R2 station
Set Mode to 8
Replaced in
step 1
Replaced in
Step 2
Replace
Replace
Master station
R1 station
Q61P
QJ72 LP25-25
Q S
er
ies
I/O m
od
ule
Q S
er
ies
I/O m
od
ule
Q S
er
ies
I/O m
od
ule
Change Mode
from 8 to "0"
R2 station
* Replacing only R1 station with Q Series
(Master station, R2, R3 not replaced)
* Replace master station and R3
with Q Series (This completes
replacement of all stations with
Q Series)
* Replace R2 station with Q Series
(Master station, R3 not replaced)
Change Mode
from 8 to "0"
R3 station
Q61P
Q06U DHCPU QJ71 LP21-25
Q S
er
ies
I/O m
od
ule
Q S
er
ies
I/O m
od
ule
Set Mode to 0
A61P
A3U CPU
AJ71 LP21
Master station
A61P
AJ71 LP21
A Series I/O module A
Series
I/O module
A Series I/O module
Master station
The method for gradually replacing the existing MELSECNET/10 remote I/O network to the Q Series is explained
below.
●
Flow of replacement
(1) Replace the existing station 1 with the Q Series in Step 1.
(2) Replace a random station with the Q Series in Step 2.
(3) In the final step, replace the master station with the Q Series CPU, and shift to the MELSECNET/H remote
I/O network.
At the same time, replace the stations remaining in the existing network as MELSECNET/10 remote I/O
network modules to the Q Series.
A3U CPU
A3U CPU
Replace
Replace
A S
eri
es
I/O m
od
ul
e
A S
eri
es
I/O m
od
ul
e
A S
eri
es
I/O m
od
ul
e
A S
eri
es
I/O m
od
ul
e
A S
eri
es
I/O m
od
ul
e
A S
eri
es
I/O m
od
ul
e
A61P
AJ72 QLP25 A S
eri
es
I/O m
od
ul
e
A S
eri
es
I/O m
od
ul
e
A S
eri
es
I/O m
od
ul
e
A61P
AJ72 QLP25 A S
eri
es
I/O m
od
ul
e
A S
eri
es
I/O m
od
ul
e
A S
eri
es
I/O m
od
ul
e
A S
eri
es
I/O m
od
ul
e
A S
eri
es
I/O m
od
ul
e
Q61P
QJ72 LP25-25
Q S
er
ies
I/O m
od
ule
Q S
er
ies
I/O m
od
ule
Q S
er
ies
I/O m
od
ule
Q61P
QJ72 LP25-25
Q S
er
ies
I/O m
od
ule
Q S
er
ies
I/O m
od
ule
Q S
er
ies
I/O m
od
ule
Q61P
QJ72 LP25-25
Q S
er
ies
I/O m
od
ule
Q S
er
ies
I/O m
od
ule
Q S
er
ies
I/O m
od
ule
(1) System configuration example
98
4.4 Gradual replacement of MELSECNET/10 Remote I/O Net
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