Pilz PSSu H PLC1 FS DP SN SD - Manual (Page 30)

Operation
Operating Manual PSSu H PLC1 FS DP SN SD
1001776­EN­04 30
8.2.8 SF, BF
The LEDs "SF" and "BF" show errors in the bus connection of errors by a subscriber in in
the bus.
Colour
SF
Colour
BF
State
SF
State
BF Key
­ ­ ­ ­ ­ ­ Supply voltage is missing
­ ­ ­ Red No connection to the bus
subscribers
­ ­ ­ Red Configuration faulty
Red ­ ­ ­ Error in the head module
­ ­ ­ Green Data transmission error­free