Mitsubishi MELSEC-A Series Reference Manual page 61

4. COMPOSITION OF A THREE-TIER SYSTEM
4.2.3 System devices
Module Model
A0J2HCPUP21
A0J2HCPUR21
A2CCPUP21
A2CCPUR21
A1NCPUP21
A1NCPUP21-S3
A1NCPUR21
A2NCPUP21
A2NCPUP21-S3
A2NCPUR21
A2NCPUP21-S1
CPU
A2NCPUP21-S4
module
A2NCPUR21-S1
with link
A3NCPUP21
function
A3NCPUP21-S3
A3NCPUR21
A2ACPUP21
A2ACPUP21-S3
A2ACPUR21
A2ACPUP21-S1
A2ACPUP21-S4
A2ACPUR21-S1
A3ACPUP21
A3ACPUP21-S3
A3ACPUR21
Table 4.2 Link modules available for the three-tier system
MELSECNET data link
Second tier
MELSEC
MELSECNET
NET
mode
mode
M L R M
REMARK
(1) The definitions of L/m station,
follows.
a) L/m station ....... Local station in the second tier/master station in the
b) station ......... Local station in the third tier
c) r station ...........
Applicable system
MELSECNET/B data link
MELSECNET
MELSECNET
composite
mode
mode
L M L R L/m
third tier
Remote I/O station in the third tier
4 - 13
Third tier
MELSEC MELSECNET
NET composite
mode mode
r L/m L/m r
station, and r station in Table 4.2 are as
: Available
Remarks
These cannot be used
as a master station for
the third tier.
Use the station number
setting switch to set the
selection of master or
local station.