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Chapter 1 Network Configuration

1 – 4

Ethernet communication port ASR communication

ASR communication function can be used for the event transmitting function which transmits data from the CPU to

the host actively at the event occurrence, the cycle transmission which transmits data to the host at constant interval,

and when receiving message data from the host at any timing. There are 6 connections and the communication

method can be specified respectively. Communication with the host is possible by only minimum setting.

Ethernet

TCP/IP

application

[Optional procedure communication]

Active Open

Connection

establish

Passive Open

Connection

establish

Waiting for

connection open

Active Open

Connection

establish

Passive Open

Connection

establish

Waiting fo

connection open

[Active Open]

[Passive Open]

Ethernet

[Transmitting Broadcast]

Ethernet

[Cycle transmitting]

Figure 1.5 ASR communication for Ethernet communication port

Serial communication port Modem connection function

Serial communication port supports the modem connection function (only in setting RS-232C). If it is set so that the

modem connection function can be used, necessary initial setting is performed to the modem automatically in

connecting with the modem. If receiving from the modem is detected as an access from the host via commercial line,

it becomes the status waiting for receiving task code.

Modem Modem

RS-232C

(MAX 57.6 kbps)

Commercial line

EHV-CPU PC

Figure 1.6 Modem connection function

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