User`s guide

MODBUS Gateway

Configuration – Network > Legacy Protocol > MODBUS Gateway

Digi TransPort routers support conversion from MODBUS serial to MODBUS TCP.

When converting from MODBUS serial to MODBUS TCP over a WAN link it is necessary to

have intelligence in the gateway\router to minimise the effect of the higher latency.

Digi TransPort supports being a MODBUS server only. Clients (e.g. remote PCs) can send

overlapping requests and the Digi TransPort will create a queue of info requests and deal

with them appropriately sending them out over the serial port and relaying the responses

back. Overlapping polls from multiple clients are supported.

Enable MODBUS Gateway

Enables or disables MODBUS gateway instance.

Async Port

Configure the local serial port number (asynchronous port) for the MODBUS serial interface.

Async Mode

Configures the serial driver for RS232 or RS485 on supported hardware.