Denial Of Service; Functionality; Denial Of Service, Frame Rate Control For Front Port Dosfrnt; Identification - ABB RET650 Technical Manual

1MRK 504 135-UEN A
17.16
17.16.1
17.16.2
17.16.2.1
17.16.2.2
17.16.2.3
Technical manual
• the fact that at least one user has tried to log on wrongly into the IED and it was
blocked (the output USRBLKED)
• the fact that at least one user is logged on (the output LOGGEDON)
Whenever one of the two events occurs, the corresponding output (USRBLKED or
LOGGEDON) is activated.

Denial of service

Functionality

The Denial of service functions (DOSLAN1 and DOSFRNT) are designed to limit
overload on the IED produced by heavy Ethernet network traffic. 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.

Denial of service, frame rate control for front port DOSFRNT

Identification

Function description
Denial of service, frame rate control for
front port

Function block

DOSFRNT
LINKUP
WARNING
ALARM
IEC09000133-1-en.vsd
IEC09000133 V1 EN
Figure 264: DOSFRNT function block

Signals

Table 511: DOSFRNT Output signals
Name Type
LINKUP BOOLEAN
WARNING BOOLEAN
ALARM BOOLEAN
Basic IED functions
IEC 61850 IEC 60617
identification identification
DOSFRNT -
Description
Ethernet link status
Frame rate is higher than normal state
Frame rate is higher than throttle state
Section 17
ANSI/IEEE C37.2
device number
-
597