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Can I use a USB-to-Serial Port adapter with an Windows HMI running EcoStruxure Operator Terminal Expert Runtime to talk to my PLC?

Published date: 15 November 2019

Issue
Is it possible to use a USB-to-Serial port adapter with my Windows HMI that is running EcoStruxure Operator Terminal Expert Runtime to talk to a PLC using a serial protocol (for example Modbus RTU)?

Product Line
EcoStruxure Operator Terminal Expert

Environment
Windows 7/Windows 10 PC or iPC running EcoStruxure Operator Terminal Expert Runtime

Resolution
Yes, it is possible to use a USB-to-Serial port adapter
However, EcoStruxure Operator Terminal Expert limits communication protocols to be used only with the ports designated COM1 and COM2. Higher COM port numbers are not supported, which means that COM1 or COM2 must be assigned in Windows to the adapter through the Device Manager depending on the hardware of the PC/iPC.
 

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