SIMATIC NET OLM12M
6ZB5530–3AB00–0BA0/01
26
Copyright Siemens AG 1997
7
LED Displays
System
Red/green LED
Not lit:
No power supply or internal power supply defective
Lit red:
FO cable break on one or both optical receive channels
Lit green:
No fault on FO cables, power supply OK
CH1 (channel)
Yellow LED
Not lit:
Data are not being received
Lit yellow:
Data being received
CH2 and CH3 (channel)
Not lit:
Data not being received
Lit yellow:
In the line and ring (passive) modes, signals data reception,
in the ring (active) mode, signals the reception of slave response
frames.
Flashes yellow:
In the ring (passive) mode, signals the reception of FO test
pulses.
Figure 26:
LED Displays on the Front Panel
