FieldServer FS-8700-47 instruction manual Appendix A.19. Select and Operate

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FS-8700-47 DNP 3.0 Driver Manual

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Appendix A.19. Select and Operate

As a Client

The DNP 3.0 Driver Client can send select, operate and direct operate messages to a Server device. The commands can be sent to Analog Output Blocks, Relay Control Blocks and Pattern Control Blocks. The responses from these commands contain status information on whether the command was accepted or rejected. The driver can store this status information so that is it available to another protocol.

When using these commands it is important to remember that the driver is not a DNP 3.0 device and is only capable of transferring data from one protocol to another. The driver does not understand the context of these commands. For example, the driver can send the select command but will not resend the command if an operate command failed because the select arm timer had expired. Another example, is when you send an operate command to a control relay, the driver sends the relay a block of data that is extracted from a Data Array. It is the content of this block that tells the relay what to do. Because the driver doesn’t understand the command but simply sends a block of data it is necessary to ensure the block of data has been formatted correctly.

The driver does not check the echoed data objects contained in the response. The DNP 3.0 specification requires that a DNP 3.0 device should.

Analog Output Block

Depending on the variation selected the driver sends a 16 or 32 bit signed value with a status byte (Status byte sent is always equal to zero).

If the active Map Descriptor used to send a select or operate command has the DA_Float_Name parameter specified with the name of a Data Array then the driver stores the status byte extracted from the response message in this secondary Data Array at the same offset specified with the “Data_Array_Offset” parameter.

Control Relay Block (Object=12)

The following 5 fields are sent with the command to operate such an object:

Field

Description

Control

This field indicates the control function to perform. The applicability of this code will

Code

depend on the type of hardware used in the end device.

Count

This field indicates the number of times that the control operation should be performed

in succession.

 

On-time

This field specifies the amount of time the digital output is to be turned on (may not

apply to all control types).

 

Off-time

This field specifies the amount of time the digital output is to be turned off (may not

apply to all control types).

 

Status

This is always sent with a value of zero.

Byte

 

By default the driver grabs one item from the Data Array specified on the Map Descriptor. It uses this value for the control code, sets the count field to 1 and sets the time and status fields to zero.

If the “dnpSubType” is specified with a value of “Combo” then the driver will extract 4 consecutive values from the Data Array specified on the Map Descriptor. These values are used to complete the ‘Control Code’, ‘Count’, ‘On-Time’ and ‘Off-Time’ fields in the message.

If the active Map Descriptor used to send a select or operate command has the “DA_Float_Name” parameter specified with the Name of a Data Array then the driver stores the status byte extracted from the response message in this secondary Data Array at the same offset specified with “Data_Array_Offset” parameter. If the “DA_Bit_Name” parameter is specified then the driver stores

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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 Hardware Connections Connection NotesConfiguring the FieldServer as a DNP 3.0 Driver Client Data ArraysClient Side Connection Descriptors Client Side Node 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 Configuring the FieldServer as a DNP 3.0 Driver Server Server Side Connection DescriptorsServer Side Node Descriptors Driver Specific Map Descriptor Parameters Map Descriptor Example 1 Discrete Data Map Descriptor Example 2 Class DataMap Descriptor Example 3 Class Data another example RTUMap Descriptor Example 4 Default Variation Variation zero Map Descriptor Example 5 ClassDataServingCtrl AnaInputs Map Descriptor Example 6 Unsolicited Messages Server Side Limitations Appendix A.3. DNP Objects mapped to FieldServer Data Arrays Appendix A. Advanced Topics Appendix A.1. DNP 3.0 ProtocolAppendix A.2. DNP Driver Functionality Appendix A.4. Channel Idle, Master & Slave IdleAppendix A.5. DLL Layer Functionality in the Master Appendix A.6. App Layer Functionality in the MasterAppendix A.7. Internal Indications, Object 80 and Dnpii Incoming Internal Indications BytesPage Internal Indications reported in Responses ServerIIArrayResponses to Polls for Object 80 Internal Indications Appendix A.8. DNPStats 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.11. Controlling the DNP 3.0 Driver’s Qualifier Appendix A.12. FieldServer DNP Node NumberAppendix A.15. Link Reset Appendix A.13. DnpSubTypeAppendix A.14. Communication Stats Appendix A.16. Controlling DA Offsets Appendix A.17. dnpIndexStyleAppendix A.18. Real Time Clock Synchronization DatimePage 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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