Mitsubishi MELSEC-A Series Reference Manual page 78

4. COMPOSITION OF A THREE-TIER SYSTEM
Module Model
A2ASCPU
+A1SJ71AT21B
A2ASCPU-S1
+A1SJ71AT21B
A2USHCPU-S1
+A1SJ71AT21B
Q2ASCPU A1SJ71
+A1SJ71AT21B AT21B
Q2ACPU-S1
+A1SJ71AT21B
Q2ASHCPU
+A1SJ71AT21B
CPU
Q2ASHCPU-S1
module
+A1SJ71AT21B
with link
function A2UCPU
+ +AJ71AT21B
link
A2UCPU-S1
modules
+AJ71AT21B
(two)
A3UCPU
+AJ71AT21B
A4UCPU
+AJ71AT21B
AJ71AT21B
Q2ACPU
+AJ71AT21B
Q2ACPU-S1
+AJ71AT21B
Q3ACPU
+AJ71A+21B
Q4ACPU
+AJ71AT21B
Table 4.4 Link modules available for the three-tier system (Continued)
Second tier
MELSEC
MELSECNET
NET
mode
mode
M L R M
*1: Applicable when the A1SJ71AT21B is used.
*2: MELSECNET, MELSECNET
second tier.
Applicable system
MELSECNET/B data link
MELSECNET
MELSECNET
composite
mode
mode
L M L R L/m
*2
*2
or MELSECNET
4 - 30
Third tier
MELSEC MELSECNET
NET composite
mode
mode
r L/m L/m r
*1*2 *1*2
*2 *2
composite modes can be used for the
: Available
Remarks
• Use the station
number setting
switch to set the
selection of
master or local
station.
• Installed in an
I/O slot in a base
unit.