# LED display, Faults and Errors reference

For UCB2 FW 7.3.3
LED display Fault table Error messages Drive status

Seven segment LED display serves as an instant reporting indication for sevral aspects of drive operation. Among them are: normal operation modes, drive enable status, procedure progress and fault conditions. The LED display gives a quick information at a glance but may require further inquiry in order to obtain full details regarding the drive condition.

Fault conditions of the drive are situations in which the drive does not function in its normal manner. The situation can be momentary and persistant, and may have simple recovery or require certain recovery procedure. The fault condition is expressed in several ways which are the seven segment LED display, A terminal serial response to a command and also is reflected in the content of several drive variables.

Error messages are serial responses which indicate that the issued command cannot be carried out either due to a syntax error, value out of range or that the operating conditions for carrying out the desired action are not met.

Drive status can be queried by several variables among them are ACTIVE, DRIVEOK, STAT, STATUS, STATUS2, FLTHIST.

White papers:

> Error table
> XLS to read STATUS