ABB RELION 670 Series Technical Manual page 1239

1MRK 502 066-UUS B
• Monitoring
• Reading events
• Resetting events
• Reading disturbance data
• Clear disturbances
• Reset LEDs
• Reset counters and other runtime component states
• Control operations
• Set system time
• Enter and exit from test mode
• Change of active setting group
The binary input signal LOCK controlling the function is defined in ACT or SMT:
Binary input
1
0
20.7 Denial of service DOS
20.7.1 Functionality
The Denial of service functions (DOSFRNT, DOSLANAB and DOSLANCD) 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.
20.7.2 Function blocks
IEC09000749 V1 EN-US
Figure 626: DOSFRNT function block
DOSLANAB
IEC13000308 V1 EN-US
Figure 627: DOSLANAB function block
Technical manual
DOSFRNT
LINKUP
WARNING
ALARM
IEC09000749-1-en.vsd
LINKUP
WARNING
ALARM
IEC13000308-1-en.vsd
Function
Activated
Deactivated
Section 20
Security
GUID-407250CA-0076-41E1-AD2D-434077AC3F1D v4
GUID-A8F084A4-9AD2-41CE-995C-64F034D27FF6 v3
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