Specifications

MELSECNET/10
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MELSECNET/10 is a high speed network system offering higher performance than the
MELSECNET II network system.
MELSECNET/10
MELSECNET/10 Coaxial cable system 32 stations
64 stations Fiber optic system
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Up to 10/20M bps transmission speed
Computer supported flexible manufacturing requires more and
more data flow on the factory floor. The high transmission rate
can expand the number of transmission data while keeping
through-put time from one PLC to another to a minimum. To
achieve this aim, MELSECNET/10 has been developed to
achieve 10M bps transmission rate, or 20M bps in dual
transmission mode of dual loop system.
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Fiber optic or coaxial cable
MELSECNET/10 offers fiber optic or coaxial cable networking.
The fiber optic cable system has the advantage of no ambient
noise and longer transmission distance. While the coaxial cable
system has much lower cost of cabling.
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High redundancy
Dual loop topology of the fiber optic cable system offers
redundancy of cables. The system can continue to operate
when a cable is accidentally disconnected or broken. In
addition to cable redundancy, MELSECNET/10’s token-pass
communication method provides a floating master function.
With this function, the network system can continue to operate
using all connected PLCs, when a master PLC is shut-down.
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Flexibility
Up to four MELSECNET/10 network modules can be installed
in a single QnA or AnU PLC system with any mix of fiber optic
or coaxial modules. Up to 255* network segments can be
connected as one large network system and any data can be
transmitted To/From any PLC in any network.
*239 when any QnACPU is in the network system.
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Extended network devices
The concept of network global devices, B & W devices,
available in MELSECNET II is also incorporated in
MELSECNET/10. The number of B & W devices has been
extended to 8192 of each. (B0 to B1FFF & W0 to W1FFF). One
handy feature of this concept is that no special programming
knowledge of network communication is required.
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PLC network or remote I/O network
MELSECNET/10 operates in either PLC-PLC network mode or
remote I/O network mode. In PLC-PLC network mode, up to
64 PLCs in a dual loop system or up to 32 PLCs in a bus system
can communicate with each other. In remote I/O network
mode, up to 64 remote I/O stations in a dual loop system or
up to 32 remote stations in a bus system can be controlled by
one master PLC.
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Diagnostic
Because network installation is often spread over a wide area,
easy troubleshooting of the network is always an important
factor when choosing a network type. Network monitor
functions of the MELSECNET/10 system supply all the
necessary information required for trouble shooting activities.
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Compatibility of CPU
MELSECNET/10 allows any AnN, AnA, AnU or QnA to be con-
nected to the system.
Note: A2ASCPU, A2U, A3U, A4U and QnACPUs are fully compatible
with MELSECNET/10. All other CPUs have limited compatibility.
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