Other characteristics of RS-485 communication include: These data wires are labeled "A" and "B" (or sometimes D+ and D-) and the polarity of each wire relative to the other determines whether the data bit is a 1 or a 0. Unlike serial interfaces that have separate Transmit (TX) and Receive (RX) wires, RS-485 uses two "differential" data wires for sending and receiving data. If you're familiar with the RS-485 standard you can skip the next section, otherwise I'd recommend giving it a quick read to get the gist. The first thing you need to know is that Pentair systems use an RS-485 interface for serial communication between connected devices, operating at 9600 baud (8/N/1). The good news is finding the cause of these problems isn't rocket science and involves no black magic. an Easytouch wireless remote or indoor panel shows "No Comm".communication timeout errors show on the intellitouch indoor panel.an Intelliflo pump won't run the schedule.pressing a button on a remote or indoor controller does nothing.The following problems can be caused by faulty communication: Communication issues are among the most common problems people run into with their Pentair pool equipment.
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