DIGI ONE IAP to dialogue between a PLC in Modbus TCP and my equipment in modbus ASCII.

Question

Hello, I have a DIGI ONE IAP. I want to dialogue between a PLC in Modbus TCP and my equipment in ASCII bus mod. I've tried the IA Modbus ASCII configuration, but that doesn't work. Can you give me more information?

thanks in advance

Answer 1

The Digi One IAP is too smart for its own good so is a little complex to setup.

Fundamentally you need to have a network master configured under the industrial automation tab to listen to modbus requests and a serial slave configured under the industrial automation tab.

You are roughly trying to achieve this without the extra serial master.

https://hub.digi.com/dp/path=/support/asset/setting-up-digi-one-iap-for-modbus-bridging-including-linking-a-serial-plc-and-serial-hmi/

The wizard should be able to do this for you but I can understand how it is difficult to get working. I personally use a USB to RS485 dongle for testing and listening on the serial side to confirm it is working.

Nicholas Wilson
Your IoT
https://www.YourIoT.com.au