41.1 Managing Modbus Gateway via the web interface. Westermo RFI-219-F4G-T7G, Viper-212A-T5G-P8-HV, RFI-219-F4G-T7G-F8, RFI-211-F4G-T7G, L106-F2G, Viper-212A, L205-S1, Viper-112A-T5G, L110-F2G, Viper-112A-T3G

Westermo OS Management Guide

Version 4.22.0-0

41.1

Managing Modbus Gateway via the web interface

The Web interface provides configuration of all Modbus Gateway Settings.

41.1.1

Modbus Gateway Overview

Menu path: Configuration ⇒ Serial ⇒ Modbus

If no Modbus Gateway is configured, click the New button to create a Modbus

Gateway and you will be presented to the edit page described in

section 41.1.2

.

Otherwise, the Modbus Gateway will be presented in a short overview.

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Westermo OS Management Guide

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41.1.2

Edit Modbus Gateway Settings

Menu path: Configuration ⇒ Serial ⇒ Modbus ⇒ New

Menu path: Configuration ⇒ Serial ⇒ Modbus ⇒

Configuration of Modbus Gateway in Server Mode

Modbus settings common to Client and Server Modes

Gateway Mode

Serial Port

Configures the Modbus Gateway mode: (TCP) Server or (TCP) Client

Selects the Serial Port

Serial Protocol

RTU Interval

Configures Serial protocol (RTU or ASCII)

Configures the RTU-interval if RTU is selected as serial protocol.

ASCII Timeout Configures the ASCII timeout if ASCII is selected as serial protocol.

Response Timeout Configures the Response timeout

Error Check Enables or disables CRC/LRC error check

Continued on next page

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Westermo OS Management Guide

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Exceptions

Continued from previous page

Configures Modbus Exceptions. With Modbus Exceptions enabled, the Modbus Gateway will react upon and respond to certain error conditions, e.g., if a Gateway in client mode receives a (serial) Modbus message addressed to Modbus unit not found in its Map table. If exception handling is desired, except for this particular situation, the gateway can be configured to ignore exceptions for unknown units.

Modbus Server specific settings

Listen interface

Poll Interval

Inactivity Timeout

Broadcast Delay

Redirect

Redirect Broadcast

Request Queue

Configures the listen Interface and port.

Configures the Poll Interval

Configures the Inactivity timer

Configures the Broadcast delay

Configures the Modbus Address redirection

Enables/Disables redirect of Modbus broadcasts

Enables/Disables the Request Queue

Configuration of Modbus Gateway in Client Mode

Modbus Client specific settings

Map table Configures the mapping of Modbus unit number to IP address and TCP port number of Modbus/TCP slaves.

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Westermo OS Management Guide

Version 4.22.0-0

41.1.3

Modbus Gateway Status Page

Menu path: Status ⇒ Serial ⇒ Modbus

Gateway Mode Current operation mode of the gateway,

Server or Client.

Serial Port

Serial Protocol

The serial port in use.

Serial protocol, RTU or ASCII.

Listen Interface Listen interface and port (only in server mode).

Active connections This list shows active and open sessions. The gateway can only handle 16 open TCP sessions; if a new connection is needed, the oldest session will be closed.

Auto Refresh Click on a value to make the page reload with updated statistics automatically every 5, 15,

30 or 60 seconds. Click Off to turn off auto refresh.

Refresh Click on this button to reload with updated statistics.

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