Mitsubishi MELSEC-A Series Reference Manual page 71

4. COMPOSITION OF A THREE-TIER SYSTEM
Module Model
A1SCPU
A1NCPU
AJ71AP21/
A2NCPU R21
AJ71AP21-S3
A2NCPU-S1
A3NCPU
A2ACPU
A2ACPU-S1
A3ACPU
A2UCPU
A2UCPU-S1
AJ71AP21/
A3UCPU R21
AJ71AP21-S3
A4UCPU
Q2ACPU
Q2ACPU-S1
Q3ACPU
Q4ACPU
CPU
Q02CPU
module
+ Q02HCPU
A1SJ71AP23
link
Q06HCPU
Q/R23Q
module
Q12HCPU
Q25HCPU
A1SJHCPU
A1SHCPU
A2SHCPU
A2ASCPU
A2ASCPU-S1
A1SJ71AT21
B
A2USHCPU-S1
Q2ASCPU
Q2ASCPU-S1
Q2ASHCPU
Q2ASHCPU-S1
A1NCPU
A2NCPU
AJ71AT21B
A2NCPU-S1
A3NCPU
Table 4.3 Link modules available for the three-tier system (Continued)
MELSECNET/B data link
Second tier
MELSEC
MELSECNET
NET
mode
mode
M L R M
Applicable system
MELSECNET data link
MELSECNET
MELSECNET
composite
mode
mode
L M L R L/m
4 - 23
Third tier
MELSEC MELSECNET
NET composite
mode mode
r L/m L/m r
Use the station
number setting switch
to set the selection of
master or local station.
Use the station
number setting switch
to set the selection of
master or local station.
: Available
Remarks
• Used only for local
stations.
• Installed in an I/O
slot in an extension
base unit.