User`s manual

170 BNO 681 00
74
LED Status LED display status
LED Status Meaning
BA green Bus active
Data telegrams are being transmitted.
off No data telegrams are being transmitted.
RC green Remote Bus Check.
Incoming remote bus correctly connected and bus reset of bus
master inactive.
off Incoming remote bus not connected or incorrectly connected or bus
master bus reset active.
RD red Remote Bus Disabled.
Extended remote bus is switched off.
off Extended remote bus is not switched off.
REL green Relay output.
Relay output is active, i.e. set.
off Relay output is not active, i.e. reset.
WR On (red) The light level at the outgoing remote bus optical receiver is below
tolerance (- 26 dBm).
WG On (red) The light level at the incoming remote bus optical receiver is below
tolerance (- 26 dBm).
ready green Ready for operation.
Supply voltage L+ for internal logic in the permitted range and
module not in reset.
off Supply voltage L+ missing or outside the permitted range, or module
in reset.
E red Remote bus branch error.
Error in the remote bus branch.
off No error in the remote bus branch.
LD green Local Remote Bus Branch Disabled.
The remote bus branch after the branch interface module is
disabled.
off The remote bus branch after the branch interface module is not
disabled.