BECKHOFF EL6930 - Manual (Page 53)

Operation
EL6930 51
4.4 Diagnostics
4.4.1 Diagnostic LEDs
The LEDs Diag 1 to Diag 4 display diagnostic information for the EL6930.
4.4.1.1 Diag 1 LED (green)
The Diag 1 LED is currently always on when a project is loaded into the terminal.
Display Meaning
lit A project is stored in the terminal.
4.4.1.2 Diag 2 LED (red)
The Diag 2 LED indicates internal process variable errors (in preparation).
Display Meaning
in preparation
4.4.1.3 Diag 3 LED (red)
The Diag 3 LED provides further details for the Diag 4 LED (see below).
4.4.1.4 Diag 4 LED (red) if Diag 3 LED (red) is lit
If the Diag 3 LED is lit, the Diag 4 LED indicates internal terminal errors.
Diag 3 LED Diag 4 LED Source of error
lit flashing µC1
lit off µC2
Note
Returning the terminal
These errors lead to the shutdown of the terminal (global fault). The terminal must be
checked by Beckhoff Automation GmbH & Co. KG.