FD67 Profibus-DP Manual
38
7.2.3 Displays of digital I/O modules
7.2.3.1 LED displays of digital I/O modules
7.2.3.1.1 Bus IN – LED displays
U
A
U
S
♦
Fig. 7-3 : Location of the U
S
and U
A
displays,.
LED designation
LED display
8
Behaviour
Status
U
S
Lit
Data exchange
U
S
Flashing
No data exchange
9
U
S
Out
No communication
10
♦
Table 7-6 : Status of the system communication
LED designation
LED display
Behaviour
Status
U
S
Green
ok (> 18 V)
U
S
Red
Undervoltage
U
S
Off
No supply (< 12 V)
♦
Table 7-7 : Status of the sensor and system supply (BusIn display)
8
The display colour indicates the voltage status.
9
Communcation interrupted at least in one line.
10
The module has no sensor supply.