ABB RES670 Technical Manual page 766

Section 21
Security
760
The denial of service functionality in FRONSTATUS, SCHLCCH and RCHLCCH
measures the IED load from communication and, if necessary, limits it from
jeopardizing the IED's control and protection functionality. The function has the
following outputs:
• RCHLCCH
• LinkAUp and LinkBUp indicates the Ethernet link status for the rear ports
channel A and B
• DOSLINKA and DOSLINKB indicates that DOS functionality is active on
channel A and channel B
• DOSALARM indicates that DOS functionality is active on the access point
• SCHLCCH and FRONTSTATUS
• LINKUP indicates the Ethernet link status
• DOSALARM indicates that DOS functionality is active on the access point
The DOS functionality activates when the inbound traffic rate exceeds
3000 packets per second.
1MRK 511 408-UUS A
Phasor measurement unit RES670 2.2 ANSI
Technical manual