ABB 615 Series - Page 28

App layer fragment is the application layer fragment size in bytes.
Additional parameters
Need time interval is the interval in minutes for setting the need time bit in the IIN.
The IIN need time bit requests the DNP 3.0 master to send a time synchronization to
the IED. When set to 0 the need time IIN bit is never set, and DNP 3.0 time
synchronization is never requested. The time synchronization source needs to be set
to DNP 3.0 to allow DNP 3.0 time synchronization. DNP 3.0 delay measurement can
have an adverse effect on time synchronization accuracy, and should be avoided for
TCP/IP.
Default Variation Obj N is the variation that the slave replies with when the master
asks for DNP Object type N variation 0. It is also the variation in which class events
are reported.
Table 9: Default variation options for supported DNP object types
DNP Obj N Default variation option Variation description
1
1 Binary input
2 Binary input with status
2
1 Binary input event
2 Binary input event with time
30
1 32 bit analog input
2 16 bit analog input
3 32 bit analog input without flag
4 16 bit analog input without flag
32
1 32 bit analog input event
2 16 bit analog input event
3 32 bit analog input event with time
4 16 bit analog input event with time
Deadbanding of the analog static values cannot be set in DNP 3.0. Event generation
is dependent on the functions employed in the IED, and the execution loops these
functions belong to. See the IED’s technical manual for setting deadbands.
As a result of the event generation mechanism in the IED, the events reported by DNP
3.0 are very accurate and are the same events that can be retrieved over the WHMI
or other protocols such as IEC 61850-8-1.
Power must be cycled to the unit after making changes to the DNP
3.0 parameters. The LHMI or WHMI will not notify the user that this
action must be taken. Only one session is allowed to place the unit in
write (edit) mode.
Section 4 1MRS756709 A
DNP 3.0 parameters
22 615 series
Communication Protocol Manual