FD67 Profibus-DP Manual
36
3
U
A
In
Out
Bus
In
Out
Bus
U
S
U
A
0
1
U
S
U
A
Bu
s R
un
Cf
g F
2
U
S
U
A
♦
Fig. 7-2 : Location of the U
S
and U
A
displays on the bus node
LED designation
LED display
7
Behaviour
Status
U
S
Lit
Data exchange
U
S
Flashing
No data exchange
U
S
Off
No communication
♦
Table 7-3 : Status of the system communication on the bus node
LED designation
LED display
Behaviour
Status
U
S
Green
ok (> 18 V)
U
S
Red
Undervoltage or short-circuit
sensor supply
U
S
Off
No supply or
sensor supply < 12,5 V
♦
Table 7-4 : Status of sensor and system supply on the bus node
7
The display colour indicates the voltage status.