FieldServer FS-8700-47 instruction manual Appendix A.5. DLL Layer Functionality in the Master

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FS-8700-47 DNP 3.0 Driver Manual

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•If required sets flags for

•Map Descriptor matching,

•fetch/store function calls

•and/or response function call

•Signals Chan idle the outgoing app layer message needs to be processed.

Master Idle • Looks for signals from chan idle that a message has been received

•Processes Map Descriptors and forms read/write messages

•Signals Chan idle the outgoing app layer message needs to be processed.

Appendix A.5. DLL Layer Functionality in the Master

The DNP Primer provided by dnp.org describes the DLL layer requests for confirmation as optional and suggests that it is not often employed. Our driver never asks for DLL layer confirmations. Thus the DLL layer functions as a mere wrapper/unwrapper layer. It wraps user data with a header and CRC's but does not perform node-node confirmations.

The only DLL layer functions which have been implemented are send and respond with user data and link reset. The slave DNP driver will not respond until a link reset has been performed. The DNP master driver sends a Link Reset request when a Map Descriptor requests data from an un-reset node. The link resetting is performed on a node-node link.

Appendix A.6. App Layer Functionality in the Master

The App layer provides over 40 app layer functions, confirmations and responses and allows for handling of a huge number of data objects.

 

 

1. Read

 

 

2. Write

 

 

3. Select

App

Layer

4. Operate

Functions

6. Direct Operate with no Ack (limited)

 

 

8. Direct Freeze with no Ack (limited)

 

 

129. Response

 

 

130. Unsolicited. (Slave Driver can parse these messages.)

 

 

The Slave indicates its internal state by appending internal indication bytes to the

 

 

app layer header of each response. Thus it can report that it is faulty, corrupted or

 

 

unable to process the request. If it can’t find a matching Map Descriptor it sets the

Internal

 

internal indication bit used to indicate that the data object parameters specified

 

cannot be parsed.

Indications

 

 

 

You can configure a Server node to respond with the internal indications bytes that

 

 

are extracted from a Data Array allowing you to control them. For more

 

 

information, refer to Error! Reference source not found..

App

Layer

The app layer contains a Qualifier Byte used to control indexing for data objects.

The DNP 3.0 Driver only handles Qualifiers 00, 01, 07, 08, 17, 28. Qualifier 6 is

Qualifier

 

supported with limitations.

 

 

App

Layer

The DNP 3.0 (master) Driver never asks for an App Layer Confirmation. The DNP

3.0 Slave Driver is capable of responding to an app layer request for confirmation

Confirmation

(to allow it to process an unsolicited message which may ask for confirmation.)

 

 

FieldServer Technologies 1991 Tarob Court Milpitas, California 95035 USA Web: www.fieldserver.com Tel: (408) 262 2299 Fax: (408) 262 2269 Toll Free: (888) 509 1970 email: support@fieldserver.com

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Contents Driver Manual FS-8700-47 DNP Table of Contents FS-8700-47 DNP 3.0 Driver Manual Table of Contents DNP 3.0 Driver Description Page FS-8700-47 DNP 3.0 Driver Manual Connection Notes Hardware ConnectionsData Arrays Configuring the FieldServer as a DNP 3.0 Driver ClientClient Side Node Descriptors Client Side Connection DescriptorsDriver Specific Map Descriptor Parameters Timing Parameters Map Descriptor Example 1 Simple Read Map Descriptor Example 3 Simple Read Extract Value & Status Map Descriptor Example 4 Reading Class Data Map Descriptor Example 6 Read an unknown variation Server Side Connection Descriptors Configuring the FieldServer as a DNP 3.0 Driver ServerServer Side Node Descriptors Driver Specific Map Descriptor Parameters Map Descriptor Example 2 Class Data Map Descriptor Example 1 Discrete DataRTU Map Descriptor Example 3 Class Data another exampleMap Descriptor Example 4 Default Variation Variation zero Map Descriptor Example 5 ClassDataServingCtrl AnaInputs Map Descriptor Example 6 Unsolicited Messages Server Side Limitations Appendix A.4. Channel Idle, Master & Slave Idle Appendix A. Advanced Topics Appendix A.1. DNP 3.0 ProtocolAppendix A.2. DNP Driver Functionality Appendix A.3. DNP Objects mapped to FieldServer Data ArraysAppendix A.6. App Layer Functionality in the Master Appendix A.5. DLL Layer Functionality in the MasterIncoming Internal Indications Bytes Appendix A.7. Internal Indications, Object 80 and DnpiiPage ServerIIArray Internal Indications reported in ResponsesResponses to Polls for Object 80 Internal Indications Dnpstats Appendix A.8. DNPStatsAppendix A.9. DNP 3.0 Data Objects Counter Change Event All Variations See notes in Appendix A.10 for function code FS-8700-47 DNP 3.0 Driver Manual Appendix A.12. FieldServer DNP Node Number Appendix A.11. Controlling the DNP 3.0 Driver’s QualifierAppendix A.15. Link Reset Appendix A.13. DnpSubTypeAppendix A.14. Communication Stats Appendix A.17. dnpIndexStyle Appendix A.16. Controlling DA OffsetsDatime Appendix A.18. Real Time Clock SynchronizationPage Appendix A.19. Select and Operate Page Page Appendix A.20. Multiple requests in a single poll Appendix B. Driver Error Messages Page Page Page FYI
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