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Interfaces, Displays and Operator Controls

Industrial Ethernet OSM/ESM

C79000-Z8976-C068-10

RM – Redundancy Manager (green LED)

Status Meaning

Lit The OSM/ESM is operating in the redundancy manager mode.

The ring is operating free of errors in other words the

redundancy manager does not allow traffic through but

monitors the ring.

Note: One OSM must operate in the redundancy manager

mode (and one only) in each OSM/ESM ring.

Not lit The OSM/ESM is not in the redundancy manager mode.

Flashes The OSM/ESM is in the redundancy manager mode and has

detected a break on the ring. The OSM/ESM makes the

connection between its two ring ports so that a functional bus

configuration is reestablished.

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Siemens OSM Istruzioni per gli Interventi Pagina 59