Siemens SIMATIC NET Operating Instructions Manual page 63

Configuration 2 (FOC1 < FOC2) , LED display:
1. Situation, no FO cable interruption:
System LED
CH1/0 LED
CH2 LED
CH3 LED
2. Problem, FOC1 interrupted:
System LED
CH1/0 LED
CH2 LED
CH3 LED
3. Problem, FOC2 interrupted:
System LED
CH1/0 LED
CH2 LED
CH3 LED
Optical link module
Operating Instructions, 01/2020, C79000-G8976-C270-06
OLM 1
Lit green
Lit yellow
Lit yellow
Not lit
OLM 1
Lit green
Lit yellow
Lit red
Lit yellow
OLM 1
Lit green
Lit yellow
Lit yellow
Lit red
Planning/configuring
7.1 Network topologies
OLM 2
Lit green
Lit yellow
Lit yellow
Not lit
OLM 2
Lit green
Lit yellow
Lit red
Lit yellow
OLM 2
Lit green
Lit yellow
Lit yellow
Lit red
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