INTRODUCTION
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1
(b) Coaxial bus system
• When the master station is replaced
• When the module is replaced gradually
(c) Coaxial loop system
MELSECNET/10 MELSECNET/H System configuration precautions
Coaxial bus Coaxial bus
The module configuration example when
the master station is replaced
1M
R
: QCPU + QJ71BR11
1R1 to 1R3: QJ72BR15 (MELSECNET/H
mode)
MELSECNET/10 MELSECNET/10 System configuration precautions
Coaxial bus Coaxial bus
The example when the module is replaced
gradually
(1R3 is replaced with the Q series module)
1R3: A(1S)J72(Q)BR15 QJ72BR15
(MELSECNET/10 mode)
MELSECNET/10 MELSECNET/H System configuration precautions
Coaxial loop
Coaxial bus
• The Q series modules do not support
the coaxial loop system. When the
existing system is replaced with the
coaxial loop system, replace all remote
I/O stations.
• Overall distance: If this value exceeds
the Q series specification value when
the MELSECNET/10 system cables are
re-used, measures (e.g. adding a
repeater unit) are required.
• Number of stations: When 64 modules
are connected, measures (e.g. dividing
into two or three networks of 32 modules
or less having a different network No.)
are required.
• Duplex loop: When the transmission
path has to be duplexed, changes to an
optical loop system, etc. are required.
1MR
(An)
1R1
(An)
1R3
(An)
1R2
(An)
Network 1
1MR
(An)
1R1
(An)
1R3
(Qn)
1R2
(An)
Network 1
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