LED

Status

Description

Run (green)

flashing

data query OK

off or on

function problems / device is defective

Link (yellow)

flashing

flashes when a message is received (steadily lit when several messages are being received)

Resp (white)

on

data requested, all data arriving

flashing rapidly

data requested, data are not arriving

flashing slowly

data requested, only some data arriving

off

no data requested

Err (red)

on

corupted message received received (possible cause: the topology setting of the drives connected to the NDBU-95 is wrong, see chapter Star topology with NDBU mode REGEN)

off

normal state, everything OK