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32-Bit Analog Output Event without Time: 8-bit flag, 32-bit integer value
16-Bit Analog Output Event without Time: 8-bit flag, 16-bit integer value
32-Bit Analog Output Event with Time: 8-bit flag, 32-bit integer value, 48-bit timestamp
16-Bit Analog Output Event with Time: 8-bit flag, 16-bit integer value, 48-bit timestamp
Single Precision Floating Point Analog Output Event without Time: 8-bit flag, 32-bit float value
Double Precision Floating Point Analog Output Event without Time: 8-bit flag, 64-bit float value
Single Precision Floating Point Analog Output Event with Time: 8-bit flag, 32-bit float value, 48-bit timestamp
Double Precision Floating Point Analog Output Event with Time: 8-bit flag, 64-bit float value, 48-bit timestamp
Point Type
Multiple object groups may reference the same point type. Objects with the same index and the same point type contain data for the same point, even if they are of different groups and variations. That is, the Binary Input object with index 1 and the Binary Input Change object with index 1 contain the value of the same binary input point.
These are the point types and their object groups defined by Std 1815-2012:
Single-Bit Binary Input
Binary Input
Binary Input Change (Binary Input Event)
Double-Bit Binary Input
Double-Bit Binary Input
Double-Bit Binary Input Event
Binary Output Point Type
Binary Output
Binary Output Event
Control Block (Binary Output Command)
Binary Output Command Event
Counter Point Type
Binary Counter (Counter)
Frozen Counter
Counter Change Event (Counter Event)
Frozen Counter Event
Analog Input Point Type
Analog Input
Frozen Analog Input
Analog Change Event (Analog Input Event)
Frozen Analog (Input) Event
Analog Input Deadband
Analog Output Point Type
Analog Output Status
Analog Output Block (Analog Output)
Analog Output Event
Analog Output Command Event
BCD Point Type
Binary-Coded Decimal
Octet String Point Type
Octet String
Octet String Event
Virtual Terminal Point Type
Virtual Terminal Output Block
Virtual Terminal Event
Security Statistics Point Type
Security Statistic
Security Statistic Event
Object Index
A DNP3 device will normally have more than one object of each point type.
For example, a DNP3 device might have:
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