System Configuration; Melsecnet/H Network Configurations; Single Network System - Mitsubishi Electric Melsec QJ71LP21 Reference Manual

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SYSTEM CONFIGURATION

2 SYSTEM CONFIGURATION

2.1 MELSECNET/H Network Configurations

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2.1.1 Single network system

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This chapter explains system configurations available with the MELSECNET/H.
This section describes network configurations available with the MELSECNET/H.
A single network system is the system where the control station and normal stations
are connected with any of the following cables.
 Optical loop system: Optical fiber cable
 Coaxial bus system: Coaxial cable
 Twisted bus system: Shielded twisted pair cable or CC-Link Ver. 1.10-compatible
cable.
(1) Optical loop system
In the optical loop system, 1 control station and 63 normal stations (a total of 64
stations) can be connected.
Any station number can be assigned as the control station.
Note that only one station can be set as the control station per system.
In the following sample system, station number 1 is assigned as the control
station.
Station No.1
(control station) (normal station)
QCPU QJ71
LP21
(2) Coaxial bus system
In the coaxial bus system, 1 control station and 31 normal stations (a total of 32
stations) can be connected.
Any station number can be assigned as the control station.
Note that only 1 station can be assigned as the control station per system.
Station No.1
(control station) (normal station)
QCPU QJ71
BR11
Terminating resistor
A6RCON-R75
Station No. 2 Station No. 64
(normal station)
QCPU QJ71 QCPU QJ71
LP21
Optical fiber cable
Station No. 2 Station No. 32
(normal station)
QCPU QJ71 QCPU
BR11
Coaxial cable
MELSEC-Q
LP21
QJ71
BR11
Terminating resistor
A6RCON-R75
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