Digi IX30 User Manual page 568

Services
14. For Fixed Modbus server address, if request messages handled by this client should always
be forwarded to a specific device, type the device's Modbus address. Leave at the default
setting of 0 to allow messages that match the Modbus address filter to be forwarded to
devices based on the Modbuss address in the message.
15. For Adjust Modbus server address, type a value to adjust the Modbus server 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 Modbus server address above the amount entered here, the address will
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 devices with the same
Modbus address on different buses. For example, if there are two devices on two different
buses that have the same Modbus address of 10, you can create two clients on the gateway:
Client one:
n
l
This will configure the gateway to deliver all messages that have the Modbus server
address of 10 to this device.
Client two:
n
l
l
This will configure the gateway to deliver all messages that have the Modbus server
address address of 20 to the device with address 10.
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 IX30
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 access the 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)>
IX30 User Guide
Modbus address filter set to 10.
Modbus address filter set to 20.
Adjust Modbus server address set to 10.
Modbus gateway
568