5.1 LED displays
35
5 Help with problems
Version 04 05/2014
5 Help with problems
Fig. 15: LED indicators on the front panel
S
y
s
t
e
m
OZD
Pr
o
fi
1
2
M
PR
0
0
1
S6
S
7
S
4
S 5
S
3
S 2
S
1
S 0
C
H1
C
H
2 C
H3
5.1 LED displays
Possible causes
– The transmission rate has been recognized and the power supply is in order
– Power supply has failed (total failure*)
– Power supply connected incorrectly
– Repeater defective
Transmission rate has not yet been recognized
– No transmitting bus subscriber present
– No connection to a partner repeater sending frames
– Send and receive optical fibers have been transposed
– Transmission rate does not correspond to PROFIBUS-DP
– Only one active bus subscriber is connected, which is only sending tokens to
itself. The indicator must switch over after a second bus subscriber has been
activated (token frames on their own are not enough to set the transfer rate).
– The connected RS 485 segment is only terminated at one end.
Transmission rate recognized but
– the network slot time could not be determined (network parameter HSA is set
too low, no transmitting bus subscriber present)
– one optical channel is set to ”Redundant optical ring“ mode, but not the
second (this operating mode must always be set at both optical channels)
– the slot time of the network configuration is too short
* failure of both power supply sources with redundant infeed
LED display
System
䡲
lights green
䡲
not lit
䡲
flashes red
䡲
flashes red /green
Signal contact
no signal
signal
no signal
no signal