Configuring legacy protocols Configure a MODBUS gateway
Digi TransPort® Routers User Guide
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Configure a MODBUS gateway
Digi TransPort routers support conversion from MODBUS serial to MODBUS TCP.
Requirements for MODBUS support in TransPort devices
When converting from MODBUS serial to MODBUS TCP over a WAN link, it is necessary to have
intelligence in the router to minimize the effect of the higher latency.
Digi TransPort supports being a MODBUS server only. Clients, such as remote PCs, can send
overlapping requests. The router 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.
Configure the MODBUS gateway
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1. Go to Configuration > Network > Legacy Protocols > MODBUS Gateway >Modbus Gateway
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2. Configure MODBUS gateway parameters:
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