Cause : TB/CB initialization fault comes when an issue during the initialization process of the Terminal Board (TB) or Communication Board (CB).

The F080 fault in siemens master drive indicates a TB/CB initialization fault (time out). This error message signifies an issue during the initialization process for the Terminal Board (TB) or Communication Board (CB). These boards are optional add-on modules that expand the functionality of your Siemens Masterdrive.

r949 = 1 PT/CB not inserted or PT/CB board code incorrect
r949 = 2 PT not compatible
r949 = 3 CB not compatible
r949 = 4 error, initialization data

1. Check the T300/CB board to ensure that is correctly inserted and that the slot and assignment coincide;
• P090 board slot 2, • P091 board slot 3
• r723 board code, •r724 board ID

2. Checking the CB initialization parameters;
• P918 CB bus address,
• 696 to P705 CB parameters 1 to 10