Denial Of Service Schlcch/Rchlcch; Application; Setting Guidelines - ABB Relion SAM600 Applications Manual

1MRK 511 445-UEN B
8.4

Denial of service SCHLCCH/RCHLCCH

8.4.1

Application

The denial of service functionality is designed to limit the CPU load that can be produced by
Ethernet network traffic on the IED. The communication facilities must not be allowed to
compromise the primary functionality of the device. All inbound network traffic will be quota
controlled so that too heavy network loads can be controlled. Heavy network load might for
instance be the result of malfunctioning equipment connected to the network.
The functions Access point diagnostics function block measure the IED load from
communication and, if necessary, limit it for not jeopardizing the IEDs control and protection
functionality due to high CPU load. The function has the following denial of service related
outputs:
• LINKSTS indicates the Ethernet link status for the rear ports (single communication)
• CHALISTS and CHBLISTS indicates the Ethernet link status for the rear ports channel A
and B (redundant communication)
• LinkStatus indicates the Ethernet link status for the front port
8.4.2

Setting guidelines

The function does not have any parameters available in the PCM600.
Switchgear control unit SAM600-IO
Application manual
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Section 8
Security
GUID-64F4D905-9F73-4073-B8F6-8D373155316A v5
GUID-CE3344E8-539B-47E0-9C19-8239988BDBCF v3
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