A113 SDCS-COM-8 communication loss alarm in ABB DCS800 drive a communication loss with the SDCS-COM-8 module. This module is responsible for various communication protocols, including fieldbus, Ethernet, and serial communication.

Troubleshooting Steps:

1. Visually inspect all cables for damage or loose connections.
2. Check the network configuration settings on the drive and the connected devices.
3. Ensure that the IP addresses, subnet masks, and gateway addresses are correct.
4. Restarting the drive can sometimes resolve temporary communication problems.