Bus status LEDs
UL
Interbus diagnostics
(green)
RC
Fieldbus connection
(green)
BA
Remote bus active (green)
RD
Remote bus switched off
(yellow)
FO1
Diagnostics, incoming fibre
optic cable length (yellow)
FO2
FB21 only:
Diagnostics, continuing
fibre optic cable length
(yellow)
In normal operating status all green LEDs light up; the yellow and red
LEDs do not light up.
Without a field bus connection the LEDs UL, RD, US1 and US2 light up.
Festo CPX-M-FB20/21-Z6 1202a English
CPX-specific LEDs
SF
System fault (red)
US1
Diagnostics, logic voltage
supply (green)
US2
Diagnostics, load voltage
supply (green)
M
Parametrisation modified
or Force active (yellow)
19