Справочник Пользователя для Mitsubishi Electronics QJ7LP25G

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MELSEC-Q

1 OVERVIEW

The following table shows the types of networks the CPU modules can be connected to.

CPU module

Type of networks

that can be used

with CPU

Network to be connected

MELSECNET/10

MELSECNET/H

PLC to PLC network Remote I/O network PLC to PLC network Remote I/O network

QCPU

MELSECNET/H

(10 Mbps)

(MELSECNET/10 mode)

(MESLECNET/H mode,

MELSECNET/H

Extended mode)

MELSECNET/H

(25 Mbps)

AnUCPU MELSECNET/10

QnACPU MELSECNET/10

: Can be used : Cannot be used

1.2 Features

The MELSECNET/H remote I/O network has the following features.

(1) Realization of a high-speed communication system

(a) High-speed data communication at 10 Mbps/25 Mbps is possible.

(25Mbps is available for only the optical loop type QJ71LP21-25,
QJ71LP21S-25 and QJ72LP25-25.)

(2) Large-scale and flexible system configuration

(a) The link device has a larger capacity: 16384 points for the link relay (LB),

16384 points for the link register (LW), and 8192 points for the link inputs
(LX)/link outputs (LY). (Refer to Section 2.1.3, "Available device range
settings.")

(b) A maximum of 4096 I/O points can be set for each remote I/O station.

The link points between a remote master station and a remote I/O station
can be set up to 1600 bytes. The link points of up to 2000 bytes can be set
between a master station and a sub-master station on a multiplexed remote
I/O network.

which allows a long station-to-station distance and total distance (up to 30
km (98430 ft.)) and is resistant to noise, or the coaxial bus system
(maximum cable distance of 500 m (1640.5 ft.)) which can be wired easily.
(Refer to Section 3.1, "Performance Specifications.")