Electro Industries Shark 200T Especificaciones descargar pdf (Pagina 244)

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C: DNP Mapping

Electro Industries/GaugeTech

The Leader In Power Monitoring and Smart Grid Solutions

Electro Industries/GaugeTech

The Leader In Power Monitoring and Smart Grid Solutions

C.3: Data Link Layer

The Shark® 200 meter can be assigned a value from 1 to 65534 as the target device

address for DNP. The data link layer follows the standard frame FT3 used by DNP Ver-

sion 3.0 protocol, but only 4 functions are implemented: Reset Link, Reset User,

Unconfirmed User Data, and Link Status, as depicted in the following table.

Table C.1: Supported Link Functions

Refer to Section C.7 for more detail on supported frames for the data link layer.

In order to establish a clean communication with the Shark® 200 meter, we

recommend that you perform the Reset Link and Reset User functions. The Link

Status is not mandatory, but if queried, it will be attended to. The inter-character

time-out for DNP is 1 second. If this amount of time, or more, elapses between two

consecutive characters within a FT3 frame, the frame will be dropped.

C.4: Application Layer

The Shark® 200 meter’s DNP version supports the Read, Write, Select, Operate,

Direct Operate and Direct Operate Unconfirmed functions. All Application layer

requests and responses follow the DNP standard. Some sample requests and

responses are included in this Appendix (see Section C.8).

• The Read function (code 01) provides a means of reading the critical measurement

data and status from the meter. This function code, depending upon the qualifier,

cab be used to read an individual object and point, a group of points within an

object, or all points within an object. It is also used to read Object 60, variation 1,

which will read all the available Class 0 objects from the DNP register map (see the

Object map in Section C.6). In order to retrieve all objects with their respective

variations, the qualifier must be set to ALL (0x06). See Section C.7 for an example

showing a Read Class 0 request-data from the meter.

Function Function Code

Reset Link 0

Reset User 1

Unconfirmed User Data 4

Link Status 9

1 2 ... 239 240 241 242 243 244 245 246 247 248 249 ... 297 298

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Electro Industries Shark 200T Especificaciones Pagina 244