Wifi communication to Freelance processor
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Wherever Freelance uses Ethernet, it is possible to use wifi. So you could replace a piece of Control Net with a wifi connection. But remember the controller does not have an internal wifi chip, so you need an external wifi router which can connect to the controller through Ethernet cable.
To talk to measuring devices Freelance controller use Fieldbusses, like PROFIBUS or FOUNDATION Fieldbus.
With Foundation Fieldbus Freelance uses FF-HSE which is based on Ethernet. FF-H1 devices are connected to a FF-HSE Linking device (LD 800 HSE) via RS485 and FF-H1 protocol. Here you could use wifi between the LD 800 HSE and the AC 800F controller.
Another Fieldbus based on Ethernet is Modbus TCP. If your device talks this protocoll it is also possible to use wifi instead of the physical cable.
Lastly IEC 60870-5-104 RTU protocoll is used by the controller, which also is based on Ethernet, but I'm not aware of measuring devices talking this protocoll.
There are measuring devices available using wireless HART, but the Freelance Controller uses HART only with remote I/O on the PROFIBUS and not directly from the controller.