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Services Modbusgateway

IX20 User Guide

740

14. For Fixed Modbusserver address, if request messageshandled by this client should always

be forwarded to a specific device, type the device's Modbusaddress. Leave at the default

setting of 0 to allow messages that match the Modbusaddress filter to be forwarded to

devices based on the Modbussaddress in the message.

15. For Adjust Modbusserver address, type a value to adjust the Modbusserver address

downward by the specified value prior to delivering the message. Allowed values are 0 through

255. Leave at the default setting of 0 to not adjust the server address.

If a packet contains a Modbusserver addressabove the amount entered here, the addresswill

be adjusted downward by this amount before the packet is delivered. This allows you to

configure clients on the gateway that will forward messages to remote deviceswith the same

Modbusaddresson different buses. For example, if there are two devices on two different

buses that have the same Modbus addressof 10, you can create two clientson the gateway:

Client one:

Modbusaddress filter set to 10.

This will configure the gateway to deliver all messagesthat have the Modbusserver

addressof 10 to this device.

Client two:

Modbusaddress filter set to 20.

Adjust Modbus server addressset to 10.

This will configure the gateway to deliver all messagesthat have the Modbusserver

addressaddress of 20 to the device with address10.

16. Repeat these steps to configure additional clients.

17. Click Apply to save the configuration and apply the change.

 Command line

1. Select the device in Remote Manager and click Actions> Open Console, or log into the IX20

local command line as a user with full Admin access rights.

Depending on your device configuration, you may be presented with an Access selection

menu. Type admin to accessthe Admin CLI.

2. At the command line, type config to enter configuration mode:

> config

(config)>

3. Enable the Modbus gateway:

(config)> service modbus_gateway enable true

(config)>

Digi IX20 User Manual

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