The A5002 alarm code on your ABB ACS355 drive indicates an incompatibility issue with the communication profile. This means the drive is unable to communicate properly with another device due to conflicting settings.

Here's a breakdown of the situation:

1. The ABB ACS355 drive can communicate with external devices like programmable logic controllers (PLCs) or Human-Machine Interfaces (HMIs) using various communication protocols.
2. Each communication protocol has specific settings that define how data is exchanged.
3. The A5002 alarm suggests a mismatch between the communication profile settings configured on the drive and the settings on the other device.