Hirschmann OZD Genius G12-1300, User Manual

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Installation OZD Profi 12M ...
Release 01 07/2017
1.2 Operating mode related functions
The operating mode is set using switches located on the front of the repeater.
A sticker attached to the side of the repeater provides assistance with the
settings. The OZD Profi 12M ... must be switched off when switching over
DIP switches.
1.2.1 Segment monitoring at the RS 485 port
If the operating mode ”Electric channel with segment monitoring“ is set, each
receiver monitors the RS 485 bus segment connected to it for faulty frames
or continuously busy networks. If faulty frames are received by the receiver,
or if the network is busy for longer than the maximum permitted send time,
forwarding of the received signals is blocked until frames can be received
again correctly, or if no signal is received for one second.
The RS 485 bus segment is not monitored in the operating mode ”Electric
port without segment monitoring“. Interference from the electrical segment
affects the entire network.
The following functions are only available for the optical channels. Whether
the functions can be activated depends on the operating mode which has
been set.

Line monitoring with echoes
The repeaters enable the connected optical paths to be actively
monitored for interruptions in the fiber line by means of the functions
”Send echo“, ”Monitor echo“ and ”Suppress echo“.

Send echo
A frame which is received by a repeater via any port is transmitted to all
other ports. If the receiving port is an optical port, the repeater sends the
frame back to the corresponding optical sender.

Monitor echo
If a repeater sends a frame - no echo – to an optical port, the repeater
expects to receive an echo. If the echo is not received after a predefined
time, an echo monitoring error is indicated by a red LED belonging to the
port.

Suppress echo
The relevant receiver is separated from the other ports from the moment
a frame is sent until the echo has been received correctly.