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Chapter 2 Specification of Communication port for CPU module

2 – 3

2.2 Ethernet communication port

2.2.1 Task code communication port

Task code communication can achieve the following functions by combining individual communication command on

a host program.

(1) CPU control (occupy / release, CPU status read, etc.)

(2) I/O control (all kinds of monitors)

(3) Memory write (all clear, batch transfer, etc.)

(4) Memory read (read of program, etc.)

(5) Response (all kinds of response from CPU)

This function can establish a system using the HMI software (SCADA, etc.) supporting HITACH H/EH series PLC

Ethernet communication and a touch panel.

Ethernet

HMI software

TCP/IP

application

Tou ch pannel

HITACH PLC

Communication driver

Application

Data memory

Task code processing

EHV-CPU

Request task code

HMI software

Response task code

EHV-CPU

Figure 2.4 Composition of Task code communication equipment

Table 2.1 Specifications for task code communication

Item Specifications

1 Command system HITACHI H/EH series PLC Ethernet task code (Server function)

2 Communication

protocol

TCP/IP, UDP/IP

3 Logical port Up to 4 (A port not to be used can be set up to the Not-Use.)

4 Logical port No. Select any from 1,024 to 65,535

5 Timeout time Invalid or Valid (Time between 1 to 65,535 sec. can be set up optionally.)

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RTS WM300 Especificaciones Pagina 17