Monitoring Data Types - Analog Inputs
- Last UpdatedAug 04, 2025
- 2 minute read
This table defines the Plant SCADA variable address required for the specified DNP3 data types.
|
Address |
Plant SCADA Type |
DNP3 Type |
Description |
|---|---|---|---|
|
AI<n>.Val |
LONG |
Analog Input Value (16/32 bit) Object 30 Var(s) 1,2,3,4 Object 32 Var(s) 1,2,3,4 |
R/O. Current value of Analog Input(16bit or 32bit value) |
|
AI<n>.Val.Float |
REAL |
Analog Input Value (float) Object 30 Var(s) 5 Object 32 Var(s) 5,7 |
R/O. Current value of Analog Input (float value) |
|
AI<n>.Val.TS |
LONG |
Analog Input Time Stamp (seconds since 1970) |
UTC time when value last changed or when the value was acquired from the initial integrity poll. |
|
AI<n>.Val.TMS |
LONG |
Analog Input Time Stamp (milliseconds since midnight) |
Milliseconds since midnight when value last changed or when the value was acquired from the initial integrity poll. |
|
AI<n>.Val.Qual |
LONG |
Analog Input Quality |
OPC quality of point converted from value of flags. |
where:
-
n = Point index number (range from 0 to 2048)
-
R/O = read only
-
W/O = write only
-
R/W = read or write
Advanced monitoring data types - analog inputs
Note: The following data types are only recommended for experienced users who are familiar with the terminology and methods associated with the DNP 3.0 protocol.
|
Address |
Plant SCADA Type |
DNP3 Type |
Description |
|---|---|---|---|
|
AI<n>.Stat |
BYTE |
Analog Input Status Status byte Object 30 Variations 1,2,5 Object 32 Var(s) 1,2,3,4,5,7 |
R/O. Status data related to Value |
|
AI<n>.Stat.Online |
DIGITAL |
Analog Input Status Online bit Object 30 Variations 1,2,5 Object 32 Var(s) 1,2,3,4,5,7 |
R/O. Bit 0 of Status byte If Offline, command will not be successful 0=Offline, 1=Online |
|
AI<n>.Stat.Restart |
DIGITAL |
Analog Input Status Restart bit Object 30 Variations 1,2,5 Object 32 Var(s) 1,2,3,4,5,7 |
R/O. Bit 1 of Status byte Originating field device has been restarted. 0=normal, 1=Restart |
|
AI<n>.Stat.CommLost |
DIGITAL |
Analog Input Status Communication Lost bit Object 30 Variations 1,2,5 Object 32 Var(s) 1,2,3,4,5,7 |
R/O. Bit 2 of Status byte If comms lost, command will not be successful 0=normal, 1=Lost |
|
AI<n>.Stat.RemForced |
DIGITAL |
Analog Input Status Remote Forced Data bit Object 30 Variations 1,2,5 Object 32 Var(s) 1,2,3,4,5,7 |
R/O. Bit 3 of Status byte Originating field device is in control 0=normal, 1=Forced |
|
AI<n>.Stat.LocalForced |
DIGITAL |
Analog Input Status Local Forced Data bit Object 30 Variations 1,2,5 Object 32 Var(s) 1,2,3,4,5,7 |
R/O. Bit 4 of Status byte This device is in control 0=normal, 1=Forced |
|
AI<n>.Stat.OverRange |
DIGITAL |
Analog Input Status Over Range bit Object 30 Variations 1,2,5 Object 32 Var(s) 1,2,3,4,5,7 |
R/O. Bit 5 of Status byte Analog is over/under range and has been clipped 0=normal, 1=Over Range |
|
AI<n>.Stat.RefCheck |
DIGITAL |
Analog Input Status Reference Check bit Object 30 Variations 1,2,5 Object 32 Var(s) 1,2,3,4,5,7 |
R/O. Bit 6 of Status byte A/D reference signal unreliable. Value is unreliable 0=normal, 1=Error |
where:
-
n = Point index number (range from 0 to 2048)
-
R/O = read only
-
W/O = write only
-
R/W = read or write