PiXtend eIO Hardware Manual
Problem
The device can not be addressed despite correct settings (DIP switch and software
configuration). Where is the mistake?
Troubleshooting & Solution
Check the connection of the power supply and the bus lines again and ask yourself the
following questions:
•
Does the power supply meet the requirements or is this possibly overloaded or
defective?
•
Are all devices on the bus configured correctly? Maybe two devices have the same
address? (this is not allowed and causes problems)
•
Are the connections of the data lines correctly connected or inadvertently
exchanged?
◦
There are often confusions with the designations A & B on the RS485 bus. An
explanation can be found in chapter 6.3 from page 82.
•
Have terminators been activated correctly? Are there too few or too many activated
bus terminations in the overall system?
•
Check DIP switch and software configuration again?!
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