3.6 DOUBLE-BIT
BINARY INPUTS Static
(Steady-State) Group
Number: 3 Event Group
Number: 4
Capabilities
(leave tick-boxes blank if
this data type is not
supported)
Current Value
If configurable, list
methods
3.6.1 Static Variation reported when variation 0 requested or in response to Class polls:
Note: The support for double-bit binary inputs can be determined remotely using protocol object Group 0
Variation 234.
● Variation 1 – packed
format
One PST or LHMI
(Obj3DefVar)
● Variation 2 – with flag
○ Based on point Index
(add column to table in
part 5)
3.6.2 Event Variation reported when variation 0 requested or in response to Class polls:
● Variation 1 – without
time
Three PST or LHMI
(Obj4DefVar)
● Variation 2 – with
absolute time
● Variation 3 – with
relative time
○ Based on point Index
(add column to table in
part 5)
3.6.3 Event reporting mode: When responding with event data and more than one event has occurred for
a data point, an Outstation may include all events or only the most recent event. “All events” must be
checked to be compliant.
○ Only most recent All events
●All events
3.6.4 Double-bit Binary Inputs included in Class 0 response:
● Always Always
○ Never
○ Only if the point is
assigned to a class
○ Based on point Index
(add column to table in
part 5)
3.6.5 Double-bit Binary Inputs Event Buffer Organization: When event buffers are allocated per object
group (see part 1.7.6), indicate the number of events that can be buffered for Double-bit Binary Inputs. If
event buffers are not allocated per object group then set “Fixed at 0”.
Table continues on next page
Section 3 1MRK 511 419-UUS A
DNP3 protocol implementation
52 650 series 2.2 ANSI
Point list manual
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