Specifications

1 - 1
1
CHAPTER 1 OVERVIEW
1.1 Overview
The MELSECNET/H network system has more functionality, higher processing speed
and more capacity than the former network system, 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 easily networked by combining with GX Developer.
The MELSECNET/H network system supports the MELSECNET/H mode (high
functionality and high-speed mode) and the MELSECNET/10 mode (functional
compatibility and performance compatibility mode) to improve the performance of the
MELSECNET/10 network system and provide compatibility between these two
systems.
This textbook is written assuming that the MELSECNET/H network system is used in
the MELSECNET/H mode.
Hereinafter, the Q corresponding MELSECNET/H network system is abbreviated as
"MELSECNET/H", and the AnU and QnA/Q4AR corresponding MELSECNET/10 as
"MELSECNET/10". Also, Qn(H)CPU is abbreviated as QCPU.
REMARK
The previous network called MELSECNET/10H is now called MELSECNET/H.
Remote master station
MELSECNET/H (25Mbsp) PLC to PLC network
Control station (MELSECNET/H mode)
MELSECNET/10
PLC to PLC network
MELSECNET/H (25Mbps)
remote I/O network
QCPU normal station
Remote I/O
station
MELSECNET/H (10Mbps)
PLC to PLC network
QCPU normal
station
Control station (MELSECNET/10 mode)
Normal
station
GX Developer
QCPU
Normal
station
QnCPU AnUCPU
Normal
station
QCPU
QCPU
Normal
station
POINT
(1) Select a QCPU as a PLC for the PLC to PLC network system of the
MELSECNET/H.
(2) The remote I/O network and the PLC to PLC network cannot be combined
together on the same network of the MELSECNET/H. Always establish
separate networks.
(3) When any of the conventional series QnA, AnU and ACPUs exist in the same
network, select the MELSECNET/10 mode, which is compatible with the
MELSECNET/10.
(4) The MELSECNET/H mode network modules and the MELSECNET/10 mode
network modules cannot be combined together on the same network.