ABB REQ650 - Denial of Service; Identification; Application; Setting Guidelines

15.14 Denial of service
15.14.1 Identification
Function description
IEC 61850
identification
IEC 60617
identification
ANSI/IEEE C37.2
device number
Denial of service, frame rate control for
front port
DOSFRNT - -
Function description IEC 61850
identification
IEC 60617
identification
ANSI/IEEE C37.2
device number
Denial of service, frame rate control for
LAN1 port
DOSLAN1 - -
15.14.2 Application
The denial of service functions (DOSFRNT,DOSLAN1 and DOSSCKT) are
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.
DOSFRNT, DOSLAN1 and DOSSCKT measures 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 outputs:
• LINKUP indicates the Ethernet link status
• WARNING indicates that communication (frame rate) is higher than normal
• ALARM indicates that the IED limits communication
15.14.3 Setting guidelines
The function does not have any parameters available in the local HMI or PCM600.
Section 15 1MRK 505 291-UEN A
Basic IED functions
314
Application manual