Mitsubishi Electric MELSEC Q Series Reference Manual page 24

(b) Configuration of a large-scale network system
Since a large number of modules and link points can be used in one network, a large-scale network system can
be constructed.
Also, when expanding the network, additional stations and send points can be easily set up.
The number of connectable modules per network is as follows.
When control station is
Universal model QCPU
When control station is
other than Universal model QCPU
*1 A Universal model QCPU can be set to station No.1 to 120.
Any other than Universal model QCPUs can be set to station No.1 to 64.
*2 Basic model QCPU or safety CPU operates as a normal station. (It cannot be set to a control station.)
The maximum link points per network is as follows.
Link relay (LB)
Link register (LW)
Link input (LX)
Link output (LY)
*3 For a Basic model QCPU or safety CPU, the link relay (LB) is 16K points (16384 points, 2KB) and the link register (LW)
is 16K points (16384 points, 32KB).
(c) High-speed data communication at 1Gbps
Because the link scan time and transmission delay time are short, applications for production of a short takt
time can be built.
Link scan time in the case where the number of stations in the network is 32
Ex.
160
120
80
40
22
32K points (32768 points, 4KB)*3
8K points (8192 points, 1KB)
8K points (8192 points, 1KB)
CC-Link IE Controller Network (1Gbps)
MELSECNET/H (25Mbps)
MELSECNET/10 (10Mbps)
0
0 1 2 4
Link points per network [K bytes]
120 (Control station:1, Normal station: 119 *1)
64 (Control station: 1, Normal station: 63)*2
8 16 32 64
128K points (131072 points, 256KB)*3
Approx.
1/30
Approx.
1/14
128