![pentair screenlogic server error pentair screenlogic server error](https://i.ytimg.com/vi/yw-FxSFYedk/hqdefault.jpg)
Pentair systems have four terminals on the comm bus connectors. This may sound obvious but the very first thing you want to check is whether your comm bus wires and connectors are making a good electrical connection. With that said, start your troubleshooting with the obvious.
![pentair screenlogic server error pentair screenlogic server error](https://uploads.tapatalk-cdn.com/20170426/ccfb53b9ced427b4b202a94202fd0382.jpg)
A begged/borrowed/stolen "known good" remote or transceiver is handy for testing.
PENTAIR SCREENLOGIC SERVER ERROR DRIVER
PENTAIR SCREENLOGIC SERVER ERROR SERIAL
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.