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Functions
2.1 General
SIPROTEC, 7SD80, Manual
E50417-G1140-C474-A1, Release date 09.2011
50
Figure 2-3
Connecting 2 7SD80 devices via protection data interfaces
Communication Failure
The communication is continuously monitored by the devices. Single faulty data telegrams are not a direct risk
if they occur only occasionally. They are recognized and counted in the device which detects the disturbance
and can be read out as statistical information.
If several faulty or no telegrams are received, this is considered a communication
disturbance
. A correspond-
ing indication is issued.
2.1.8.2
Setting Notes
General
The protection interfaces connect the devices via optical fiber or copper cables. The communication is perma-
nently monitored by the devices. Address
4510
TD-DATA DISTURB
defines after which time delay the user is
informed about a faulty or missing telegram.
Once a fault has been detected in the protection interface communication, the time at address
4512
Td
ResetRemote
is started for resetting the remote signals. Please note that only the time of the device whose
remote end has failed is effective.
Protection Interface Optical Fiber
If you use an optical fiber connection, switch it
ON
or
OFF
at address
4501
PDI FO
.
Address
4502
PDI FO TER
allows you to enter the permissible maximum fault rate in percent.
At address
4503
PDI FO level
you can define the minimum receiving level.
Notes on the settings are given in the Technical Data.
Protection Interface Copper Cable Cu
If you use a copper cable connected to the voltage terminals of the device, switch it
ON
or
OFF
at address
4601
PDI Cu
.
Address
4602
PDI Cu TER
allows you to enter the permissible maximum fault rate in percent.
At address
4604
PDI Cu MAX ATT
you can set the maximum attenuation.
At address
4605
PDI Cu S/N
you can define the minimum signal/noise ratio.
At address
4603
PDI Cu mode
you can specify the transmission parameters.
Notes on the settings are given in the Technical Data.