RTS WM300 Specifikace stáhnout pdf (Strana 7)

Chapter 1 Network Configuration

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(1) Dedicated procedure communication (Task code communication)

A dedicated procedure communication of Hitachi PLC is called a task code communication. CPU can be controlled

from the host and I/O can be read and written. Each sales maker provides a driver for this task code communication

such as a touch panel and HMI (Human Machine Interface) software. For compatible Hitachi PLCs, it is unnecessary

to create a special program.

Touch pannel

Serial communication

Host

Ethernet

Ethernet task code communication

Serial task code communication

Hitachi PLC

Communication

driver

Application

Data memory

Task code

EH-150

Request task code

HMI software

Response task code

Figure 1.3 Task code communication

(2) No procedure communication

Serial communication port General-purpose communication

Serial communication port can be used as a general-purpose port which can be controlled by a user program.

Various setting for communication and processing for transmitting and receiving can be created with the user

program, matching to external equipments.

General-purpose

communication

External equipments

TRNS0

RECV0

User program

Serial port

Figure 1.4 General-purpose communication for Serial communication port

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RTS WM300 Specifikace Strana 7