Hirschmann OZD Genius G12-1300, User Manual

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Installation OZD Profi 12M ...
Release 01 07/2017
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Segmentation
If an echo monitoring error or a frame falsification arises at an optical port,
the repeater assumes that the line is faulty and blocks this port for user
data. The connected field bus partial network is then segmented (cut off).
This segmentation causes the repeater at the other end of the optical fiber
to be segmented as well. Both repeaters connected to the segmented
field bus partial network send test frames to the segmented ports. These
test frames – which are to be received regularly – can be used by both
repeaters to check the status of the field bus partial network. The
segmentation is automatically lifted as soon as the test frames indicate to
both repeaters that the segmented field bus partial network is no longer
disturbed. If all active bus subscribers are deactivated in a previously
active network, the repeaters are segmented cyclically in order to check
the fiber links to the neighboring repeaters. If there is no frame traffic, but
the fiber links are intact, the port LEDs of the optical ports flash yellow
cyclically.