Overview - Mitsubishi Electric QJ71LP21 Reference Manual

1 OVERVIEW

1 OVERVIEW
The MELSECNET/H system includes the following 2 types of networks:
1) PLC to PLC network for communications between a control station and normal
2) Remote I/O network for communications between a remote master station and
This is the manual to read when building a remote I/O network for MELSECNET/H
systems (hereafter called MELSECNET/H). If you are building a MELSECNET/H
network for PLC to PLC network, please refer to the Q-corresponding MELSECNET/H
network system reference manual. (PLC to PLC network) (SH-080049)
The Q00JCPU, Q00CPU and Q01CPU cannot configure a remote I/O network in a
MELSECNET/H network system.
1.1 Overview
The MELSECNET/H remote I/O network system has more functionality and capacity
than the former network system, MELSECNET/10 network system (hereafter referred
to as MELSECNET/10).
As the MELSECNET/H remote I/O network adopts the same module mounting method
as the usual one (mounting I/O modules and intelligent function modules onto the main
base unit/expansion base unit), each module mounted on the remote I/O stations can
be handled in the similar way as the basic one.
In addition, the applicability to the MELSECNET/10 remote I/O network has been
further enhanced so that the FA system can be easily configured.
In the MELSECNET/H remote I/O network optical loop system, the communication
speed can be set to 25 Mbps or 10 Mbps.
QCPU normal station
QnACPU
normal station
MELSECNET/H (25Mbps) remote I/O network
Remote I/O station
GX Developer
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stations
remote I/O stations
POINT
REMARK
The previous network, called MELSECNET/10H is now called MELSECNET/H.
MELSECNET/H
1: QJ71LP21-25, QJ71LP21S-25, QJ72LP25-25 only
Control station (MELSECNET/10 mode)
GX Developer
MELSECNET/H (10Mbps)
PLC to PLC network
AnUCPU
normal station normal station
Remote I/O station Remote I/O station
Network system
Optical loop 1
Optical loop, coaxial cable
Remote master station
QCPU Control station (MELSECNET/H mode)
MELSECNET/H (25Mbps)
PC network
MELSECNET/H (10Mbps)
remote I/O network
QCPU
MELSEC-Q
Communication speed
25 Mbps
10 Mbps
QCPU normal station
QCPU normal station
Remote I/O station
1 - 1
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