The letters in the communication error message signify the area where the error has occurred.
A: X motor
B: Y motor
E: Interface
The numbers signify the type of problem with the communication:
1: no communication- check the connection
2: crosstalk between two connections (a message sent to x motor went to y motor)- make sure connectors are plugged into correct areas
3: several failed attempts at communication
4: broken, or incomplete message- a connection may be loose
5: checksum error
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