Black Box IC109A-R2 Instrukcja Instalacji Pobierz pdf (Strona 111)

10563230-216-229-B1

Use

SFT2841 Setting and Operating

Software

Configuring Sepam™

PE50590

Called Modem Configuration

The modem on the Sepam™ side is the called modem. Confugure this modem first,

either by AT commands from a PC using HyperTerminal (the configuration tool

supplied with the modem) or by setting switches (see the modem manufacturer’s

manual).

Modem RS485 Interface

The configuration parameters for the modem’s RS485 interface are defined in

accordance with the Sepam™ communication interface configuration:

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

b character format: 8 data bits + 1 stop bit + parity (none, even, odd)

Telephone Network Interface

Modern modems offer sophisticated features such as checking telephone line

quality, error correction, and data compression. These options are not appropriate

for communication between SFT2841 and Sepam™, which is based on the Modbus

RTU protocol. They can adversely affect communication performance.

You should pay attention to the following items:

1 Invalidate the error correction, data compression, and telephone line quality

monitoring options.

2 Use the same end-to-end communication speed between:

b the Sepam™ network and the called modem

b the called modem (Sepam™ side) and the calling modem (PC side)

b the PC and the calling modem (see recommended configurations table)

Configuration window for the communication network via

telephone modem

Sepam™ Network Telephone Network PC Modem Interface

38400 baud V34 modulation, 33600 baud 38400 baud

19200 baud V34 modulation, 19200 baud 19200 baud

9600 baud V32 modulation, 9600 baud 9600 baud

Industrial Configuration Profile

The following table shows the main characteristics of the Sepam™-side modem.

These characteristics match a configuration profile commonly known as an

"industrial profile," as opposed to the configuration of modems used in offices.

Depending on the type of modem, configuration occurs by AT commands from a PC

using HyperTerminal, a configuration tool supplied with the modem, or by switch

settings (see the modem manufacturer’s manual).

Industrial Profile Configuration Characteristics AT Command

Transmission in buffered mode, without error correction \N0 (force &Q6)

Data compression deactivated %C0

Line quality monitoring deactivated %E0

DTR signal assumed to be permanently off (allows the modem

connection to be established automatically on an incoming call)

&D0

CD signal off when carrier is present &C1

All reports made to Sepam™ blocked Q1

Character echo suppression E0

No flow control &K0

1 2 ... 106 107 108 109 110 111 112 113 114 115 116 ... 163 164

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