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FS-8700-47 DNP 3.0 Driver Manual Page 28 of 51
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Appendix A.7. Internal Indications, Object 80 and DNP_II
The driver can store the Internal Indications Bits found in incoming messages and it is possible to
control the values of the internal indication bytes sent in responses. In addition, the driver can be
configured to respond to the Poll for Object 80 (Internal Indications)
A.7.1.
Incoming Internal Indications Bytes
This driver can expose data from the most recently consumed message and additional diagnostic
information using a special Map Descriptor called “DNP_ii” (DNP Internal Indications)
The following example shows the configuration of this Map Descriptor. Only one of these Map
Descriptors may be configured per FieldServer.
Nodes
Node_Name ,Protocol
Null_Node ,DNP
Data_Arrays
Data_Array_Name ,Data_Format ,Data_Array_Length
DNP_DIAG ,UINT32 ,100
Map_Descriptors
Map_Descriptor_Name ,Data_Array_Name, ,Node_Name
dnp-ii ,DNP_DIAG , ,Null_Node
The following data is stored in the Data Array DNP_DIAG.
Array
Element
Contents
0
The first byte of the Internal indication reported by a DNP device as found in the most
recently received message.
Only messages complete enough to warrant parsing will cause this item to be
updated.
DNP devices only contain internal indication bytes when the message is an application
layer response type message. Typically this includes all responses to data
queries/writes as well as unsolicited messages.
1 The 2
nd
byte of the response internal indication.
Bit zero is the least significant bit.
A one (1) in the bit position indicates the described state.
Bit
#
Explanation
First Byte
Bit
0
All stations message received
Set when a request is received with the destination address of the all stations address (ffff
hexadecimal).
Cleared after next response (even if response to global request is required)
Used to let the master station know that a Broadcasted message was received by this station.
Bit
1
Class 1 data available
Set when data that has been configured as Class 1 data is ready to be sent to the master
Master station should request this class data from the Outstation when this bit is set in a