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Using DNP Mapping for the Shark
C.1: Overview
This Appendix describes the functionality of the DNP Lite protocol in the Shark
programmer must follow this information in order to retrieve data from the Shark
protocol. DNP Lite is a reduced set of the Distributed Network Protocol Version 3.0 subset 2, and it gives
enough functionality to get critical measurements from the Shark
The DNP Lite supports class 0 object only. No event generation is supported. The Shark
when in DNP Lite will always act as a secondary device (slave).
C.2: Physical Layer
DNP Lite uses serial communication. It can be assigned to Port 2 (RS-485 compliant port) or any
communication capable option board. Speed and data format is transparent for DNP Lite: they can be set
to any supported value. The IrDA port cannot use DNP Lite.
C.3: Data Link Layer
®
The Shark
200 meter can be assigned with a value from 1 to 65534 as the target device address for
DNP Lite. The data link layer follows the standard frame FT3 used by the DNP Version 3.0 protocol, but
only 3 functions are implemented: Reset Link, Reset User and Link Status, as depicted in the following
table.
Table C.1: Supported Link Functions.[dst] and [src] are the device address
Please 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
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 Lite is 1 second. If this amount of time, or more,
elapses between two consecutive characters within a FT3 frame, the frame will be dropped.
E
Electro Industries/Gauge Tech
Appendix C
Function
Reset Link
Reset User
Link Status
®
of the Shark
200 Meter and Master device, respectively.
®
®
200 meter.
Function Code
0
1
9
®
200 meter, we recommended you perform
Doc# E149701
200 Meter
®
200 meter. A DNP
®
200 meter using this
®
200 meter
C-
1
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