Section 17
Basic IED functions
17.16
17.16.1
17.16.2
17.16.2.1
17.16.2.2
17.16.2.3
654
•
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 312:
DOSFRNT function block
Signals
Table 526:
DOSFRNT Output signals
Name
Type
LINKUP
BOOLEAN
WARNING
BOOLEAN
ALARM
BOOLEAN
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
1MRK 502 048-UEN A
ANSI/IEEE C37.2
device number
-
Technical manual