Technical information

24
MITSUBISHI ELECTRIC
NETWORKS
/// NETWORKS
MELSECNET/H
For the systems that demand uncompromising
reliability and high speed per formance, only a
dedicated network can deliver. MELSECNET/H
and it ’s predecessor MELSECNET/10 use high
speed, redundant functionality to give deter
-
ministic delivery of large data volumes.
This is Mitsubishi’s own dedicated network.
MELSECNET has a dual cable configuration. This
offers high network availability, as cable breaks
are automatically detected and the ac tive com
-
munication channel is automatically re-routed
around the suspected break. The MELSECNET
network also allows a floating master. This
allows other PLCs on the network to take up
the position of network master should a fault
develop with the currently selec ted master.
The MELS ECNE T allows very large network
coverage of up to 30 km.
앬
Up to 64 stations per network
앬
Up to 255 networks (AnS series) or 239 net-
work (System Q) can be joined together
앬
Floating master give excellent redundancy if
master station fails
앬
Fibre optic (GI or SI cable) and 50 ⏲ coaxial
connection
앬
Used for peer-to-peer or remote I/O control
앬
Easy set-up, no programming needed
앬
Strong diagnostics built into the network
interface, PLC CPU and programming soft-
ware
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Up to 16 k words of data per network
앬
Maximum transmission speed 50 Mbps
(SI fibre only, full duplex communication)
앬
Maximum transmission distance for single
network, 30 km fibre loop or 500 m coaxial
Model type Series Module Description
Art. no.
Master/local
Qseries
QJ71BR11 MELSECNET/H master/local, coaxial cable 127592
QJ71LP21GE MELSECNET/H master/local, GI 62.5/125 fibre optic cable 138959
QJ71LP21-25 MELSECNET/H master/local, SI fibre optic cable 136391
AnS
A1SJ71LP21GE MELSECNET/10 master/local, GI 62.5/125 fibre optic cable 53457
A1SJ71LP21 MELSECNET/10 master/local, SI fibre optic cable 47868
A1SJ71BR11 MELSECNET/10 master/local, coaxialcable 47869
A1SJ71QBR11 Q2AS MELSECNET/10 master/local, coaxial cable 66540
A1SJ71QLP21GE Q2AS MELSECNET/10 master/local, GI 62.5/125 fibre-optic cable 87152
Slave I/O
Qseries
QJ72LP25-25 MELSECNET/H remote I/O controller, SI fibre optic cable 136392
QJ72BR15 MELSECNET/H remote I/O controller, coaxial cable 136393
QnAS
A1SJ72QBR15 QnAS MELSECNET/10 remote I/O controller, coaxial cable 68450
A1SJ72QLP25 QnAS MELSECNET/10 remote I/O controller, SI fibre-optic cable 68449
Bus Master
Normal/Standby
Master
Normal/Standby
Remote Modular I/O
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