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Appendix B
DNP Data Formats
The DNP Protocol is an option that can be enabled at the factory or can be enabled in the field via a
software key using the Web Browser Option Upgrade screen. The DNP Communication option is
used to transmit point status (Binary Inputs) and time stamped events (Binary Input Change with
Time). The DNP Communications work in a slave mode and operate over RS-232/485 or Ethernet.
The DNP implementation is outlined in the Device Profile Document.
Device Profile Document
DNP V3.0
DEVICE PROFILE DOCUMENT
Vendor Name: AMETEK Power Instruments
Device Name: DMS-3K, using the Triangle MicroWorks, Inc. DNP3 Multi-Port Slave Source
Code Library
Highest DNP Level Supported:
For Requests:
For Responses:
Notable objects, functions, and/or qualifiers supported in addition to the Highest DNP Levels
Supported (the complete list is described in the attached table):
For static (non-change-event) object requests, request qualifier codes 00 and 01 (start-stop),
and 17 and 28 (index) are supported in addition to request qualifier code 06 (no range – or all
points). Static object requests received with qualifiers 00, 01 or 06, will be responded to with
qualifiers 00 or 01. Static object requests received with qualifiers 17 or 28 will be responded
to with qualifiers 17 or 28. For change-event object requests, qualifier codes 06 (no range)
and 07 and 08 (limited quantity) are supported. Qualifiers 17 or 28 are always returned.
Maximum Data Link Frame Size (octets):
Transmitted:
292
Received
292
Maximum Data Link Re-tries:
Configurable from 0 to 255
Requires Data Link Layer Confirmation:
Configurable as: Never, Sometimes or Always
Requires Application Layer Confirmation:
When sending multi-fragment responses (Slave devices only)
Sometimes
Timeouts while waiting for:
Data Link Confirm:
Complete Appl. Fragment: None
Application Confirm:
Complete Appl. Response: None
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DNP Protocol
Level 2
Level 2
Configurable.
None
Device Function:
Slave
Maximum Application Fragment Size (octets):
Transmitted:
Configurable up to 2048
Received
2048
Maximum Application Layer Re-tries:
None
Appendix B
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