14: Tunnel and Modbus Settings

Modbus Settings

The Modbus server, if enabled, is active on TCP port 502. If present, the additional TCP port is also used. Modbus TCP parameters are configured using the Modbus menu and submenus under Admin.

 

Table 14-2 Modbus Settings

 

 

Modbus Settings

Description

TCP Server State

Click to turn the TCP server state On or Off. The TCP port is 502.

 

 

Additional TCP Server Port

If present, the Modbus server also listens on this TCP port.

 

 

Response Timeout

Enter the amount of time, in milliseconds, where the Modbus server will

 

timeout in lieu of a response.

 

 

RSS Trace Input

Click to turn RSS trace input On or Off. If RSS trace input is enabled, each

 

PDU received on the Modbus serial line creates a non-persistent

 

descriptive item in the RSS feed.

 

 

To Configure Modbus Settings

Using Web Manager

To configure the Modbus, go to the Admin tab/page and click Modbus in the menu.

Using the CLI

To enter the Modbus command level: enable -> config -> modbus

Using XML

Include in your file: <configgroup name="modbus">

Supported Modbus TCP/IP Functions and Registers

Table 14-3 0xxxx Read/Write Coils (Function Codes 1, 5 and 15)

Device Address

Modbus Address

Description

00001

0x0000

0: Relay 1 Off, 1: Relay 1 On

 

 

 

00002

0x0001

0: Relay 2 Off, 1: Relay 2 On

 

 

 

00003

0x0002

Write 1 to reset latched Relay 1

 

 

 

00004

0x0003

Write 1 to reset latched Relay 2

 

 

 

xSenso User Guide

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Lantronix XSENSO 21R2, XSENSO 2100 manual To Configure Modbus Settings, Supported Modbus TCP/IP Functions and Registers

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