Black Box IC109A-R2 Instalační manuál stáhnout pdf (Strana 110)

104

Use

SFT2841 Setting and Operating

Software

Configuring Sepam™

PE50590

Link via Telephone Modem

The Sepam™ units connect to an RS485 multidrop network using an industrial STN

modem.

Modem configuration occurs in one of two ways:

b through AT commands from a PC using HyperTerminal

b the configuration tool supplied with the modem

b switch settings from the modem manufacturer’s manual

The PC may use an internal or external modem as its calling modem. Install and

configure this modem according to Windows modem installation procedure.

Modem Configuration in SFT2841

When you configure Sepam™, SFT2841 displays a list of all modems installed on the

PC.

The communication parameters you must define are:

b modem: select one of the modems listed by SFT2841

b telephone no.: the number of the remote modem to be called

b speed: 4800, 9600, 19200, or 38400 baud

b parity: none (not adjustable)

b handshake: none, RTS or RTS-CTS

b time-out: from 100 to 3000 ms

Communication by modem and telephone network slows because of the

transit time through the modems. A time-out value of 800 ms to 1000 ms is

sufficient in most 38400 baud installations. In some cases, telephone network

quality may require a slower speed (9600 or 4800 bauds). The time-out value

should then be increased (2 to 3 seconds).

b number of retries: from 1 to 6

Note: The speed and parity of the calling modem must be configured under Windows with the

same values as for SFT2841.

Configuration window for the communication network by

telephone modem

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Black Box IC109A-R2 Instalační manuál Strana 110