ABB Relion 650 Series Applications Manual page 244

Section 15
Basic IED functions
• 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)
The two outputs of ATHSTAT function can be used in the configuration for different indication and
alarming reasons, or can be sent to the station control for the same purpose.
15.14 Denial of service
15.14.1 Identification
Function description
Denial of service, frame rate control
for front port
Function description
Denial of service, frame rate control
for LAN1 port
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.
238
IEC 61850
identification
DOSFRNT
IEC 61850
identification
DOSLAN1
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IEC 60617 ANSI/IEEE C37.2
identification device number
- -
IEC 60617 ANSI/IEEE C37.2
identification device number
- -
1MRK 505 287-UUS B
GUID-09BC0991-6FA3-4137-9B7C-A42D5D60D925 v1
GUID-C8EAE89C-6916-435E-B343-41289CB10213 v1
GUID-64F4D905-9F73-4073-B8F6-8D373155316A v3
GUID-CE3344E8-539B-47E0-9C19-8239988BDBCF v2
Busbar protection REB650
Application manual