Mitsubishi MELSEC-A Series Reference Manual page 73

4. COMPOSITION OF A THREE-TIER SYSTEM
Module Model
A1NCPUP21
A1NCPUP21-S3
A1NCPUR21
A2NCPUP21
A2NCPUP21-S3
A2NCPUR21
A2NCPUP21-S1
A2NCPUP21-S4
CPU
A2NCPUR21-S1
module
A3NCPUP21
with link
function A3NCPUP21-S3 AJ71AT21B
+
A3NCPUR21
link
A2ACPUP21
module
A2ACPUP21-S3
A2ACPUR21
A2ACPUP21-S1
A2ACPUP21-S4
A2ACPUR21-S1
A3ACPUP21
A3ACPUP21-S3
A3ACPUR21
A2ASCPU
+A1SJ71AP21
A2ASCPU
CPU
+A1SJ71AR21
module
A2ACPU-S1
with link
+A1SJ71AP21
function A1SJ71AT21
+ B
A2ACPU-S1
link
+A1SJ71AR21
modules
A2USHCPU-S1
(two)
+A1SJ71AP21
A2USHCPU-S1
+A1SJ71AR21
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
*1: MELSECNET and MELSECNET
*2: MELSECNET, MELSECNET
second tier.
*3: Applicable when the A1SJ71AT21B is used.
Applicable system
MELSECNET data link
MELSECNET
MELSECNET
composite
mode
mode
L M L R L/m
*1
*2
*2
composite modes can be used for the second tier.
, and MELSECNET
4 - 25
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
*2 *2
master or local
station.
*2*3 *2*3
composite modes can be used for the
: Available
Remarks