Overview - Mitsubishi Electric Q Series Reference Manual

1 OVERVIEW

1 OVERVIEW
The MELSECNET/H network system includes an PLC to PLC network for interactively
communicating between control stations and normal stations, and a remote I/O
network for interactively communicating between remote master stations and remote
I/O stations.
This manual is to be read when structuring PLC to PLC networks on MELSECNET/H
network systems (hereinafter known as MESECNET/H.)
The Q corresponding MELSECNET/H Network System Reference Manual (Remote
I/O networks) is to be read when structuring remote I/O networks with MELSECNET/H.
1.1 Overview
The PLC to PLC network system of MELSECNET/H provides more functionality,
higher processing speed and more capacity than the conventional PLC to PLC network
system of MELSECNET/10 network system.
In addition, in pursuit of the maximum ease of use of the MELSECNET/10 network
system, the FA system can be networked easily by combining with GX Developer.
The MELSECNET/H system supports the MELSECNET/H and MELSECNET/H
Extended modes (high functionality and high-speed mode) and the MELSECNET/10
mode (functional and performance compatibility mode) to achieve the network
performance improvement and upward compatibility of MELSECNET/10.
MELSECNET/H PLC to PLC network optical loop systems can be set at
communications speeds of 25Mbps and 10Mbps.
1 - 1
REMARKS
Networks previously known as MELSECNET/10H are abbreviated here as
MELSECNET/H.
Network system
Optical loop, coaxial bus
MELSECNET/H
Optical loop
1: QJ71LP21-25 and QJ71LP21S-25 only
Communication speed
10Mbps
1 25Mbps
MELSEC-Q
1
1 - 1