Eaton IQ 150S, User & Installation Manual

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IM02601006E www.eaton.com D-1
IQ 250S D: DNP Map
D: IQ 250S Meter DNP Map
D.1: Overview
This Appendix describes the functionality of the IQ250S meter's version of the DNP protocol. A
DNP programmer needs this information to retrieve data from the IQ 250S meter. The DNP ver-
sion used by the IQ 250S is a reduced set of the Distributed Network Protocol Version 3.0 subset
2; it gives enough functionality to get critical measurements from the IQ 250S meter.
The IQ 250S meter's DNP version supports Class 0 object/qualifiers 0,1,2,6, only. No event gener-
ation is supported. The IQ 250S meter always acts as a secondary device (slave) in DNP
communication.
D.2: Physical Layer
The IQ250S meter's DNP version uses serial communication. Port 2 (RS485 compliant port) is
used. Speed and data format is transparent for the IQ250S meter's DNP version: they can be set
to any supported value.
D.3: Data Link Layer
The IQ 250S meter can be assigned a value from 1 to 65534 as the target device address. The
data link layer follows the standard frame FT3 used by DNP Version 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 D.1: Supported Link Functions
[dst] and [src] are the device address of the IQ 250S meter and Master device, respectively. Refer
to Section D.7 for more detail on supported frames for the data link layer.
Function Function Code
Reset Link 0
Reset User 1
Unconfirmed User Data 4
Link Status 9