Perle Systems IOLAN SCS Bedienungsanleitung PDF herunterladen (Seite 108)

Serial Port Profiles

108 IOLAN SDS/SCS/STS User’s Guide, Version 3.6

Duplex Used with a EIA-485 serial interface, specify whether the serial port is Full

Duplex

(communication both ways at the same time) or Half Duplex

(communication in one direction at a time).

Default: Full

TX Driver Control Used with a EIA-485 serial interface, if your application supports RTS

(Request To Send), select this option. Otherwise, select

Auto.

Default: Auto

Flow Control Defines whether the data flow is handled by the software (Soft), hardware

(

Hard), Both, or None. If you are using SLIP, set to Hard only. If you are

using

PPP, set to either Soft or Hard (Hard is recommended). If you select

Soft with PPP, you must set the ACCM parameter when you configure PPP for

the

Serial Port.

Data Options: Soft, Hard, Both, None

Default: None

Enable Inbound

Flow Control

Determines if input flow control is to be used.

Default: Enabled

Enable Outbound

Flow Control

Determines if output flow control is to be used.

Default: Enabled

Monitor DSR Specifies whether the EIA-232 signal DSR (Data Set Ready) should be

monitored. This is used with modems or any device that sends a DSR signal.

When it is monitored and the IOLAN detects a DSR signal, the line profile is

started. If both

Monitor DCD and Monitor DSR are enabled, both signals must

be detected before the line profile is started.

Default: Disabled

Monitor DCD Specifies whether the EIA-232 signal DCD (Data Carrier Detect) should be

monitored. This is used with modems or any other device that sends a DCD

signal. When it is monitored and the IOLAN detects a DCD signal, the line

profile is started. If both

Monitor DCD and Monitor DSR are enabled, both

signals must be detected before the line profile is started.

Default: Disabled

Enable Line

Termination

Used with EIA-422 and EIA-485 on SDS rack mount IOLAN models,

specifies whether or not the line is terminated; use this option when the serial

port is connected to a device at the end of the serial network.

Default: Disabled

Enable Echo

Suppression

This parameter applies only to EIA-485 Half Duplex mode. All characters will

be echoed to the user and transmitted across the serial ports. Some EIA-485

applications require local echo to be enabled in order to monitor the loopback

data to determine that line contention has occurred. If your application cannot

handle loopback data, echo suppression should be enabled.

Default: Disabled

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