Festo CPX-FB33 Manual page 116

2. Commissioning
2-68
The LEDs "Network Failure" (NF), "Maintenance/PROFIen-
ergy" (M/P) and "System Failure" (SF) do not light.
The "Modify" (M) LED lights or flashes only for the "Changed
parameterisation" setting (system start with saved paramet-
erisation and saved CPX expansion) or "Force active" (force
mode, function no. 4402; see CPX system description P.BE-
CPX-SYS..., "On the spot diagnostics").
Detailed information about the significance of the individual
LEDs and information on diagnostics and error handling can
be found in section 3.2 of this description and in the CPX sys-
tem description (P.BE-CPX-SYS-...).
Festo P.BE-CPX-PNIO-EN en 1407c English