Section 5 Tolerances; Dnp3 Timing Considerations - ABB 620 Series Manual

1MAC459571-IB C
Section 5
5.1
620 series ANSI
Communication Protocol Manual
Tolerances

DNP3 timing considerations

Table 11: The protection relay's worst-case error over the full operating temperature range
Description
Time base drift over a 10-minute interval
Maximum delay measurement error
Maximum internal time reference error when set from
the protocol
Maximum response time
Event time accuracy
Event processing delay
1) This represents the time it takes for a physical input from the time it changes to the time it is reported by
DNP3. The internal latency between the protection logic and the communication processor is 4 ms for BI,
and 500 ms for AI.
Data link layer filtering is not performed based on the source address.
The protection relay supports collision avoidance. Collision detection is available as
implemented by the DNP3 link layer and TCP/IP. When DNP3 uses the serial channel,
there is no collision avoidance. Collision detection in this instance is handled by the DNP3
link layer.
Value
1.2 ms
±15 ms
±100 ms
50 ms turnaround time (TCP/IP)
4 ms for BI and 500 ms for AI
1)
20 ms for BI; 1500 ms for AI
Section 5
Tolerances
25