Mitsubishi Electric ME-RTU Bedienungsanleitung Seite 261

DEVICE PROPERTIES
1 DEVICE PROPERTIES
This document is intended to be used for several purposes, including:
● Identifying the capabilities of a DNP3 device (Master Station or Outstation)
● Recording the settings of a specific instance of a device (parameter settings for a specific instance
of the device in the user's total DNP3 estate)
● Matching user requirements to product capabilities when procuring a DNP3 device
The document is therefore structured to show, for each technical feature, the capabilities of the device
(or capabilities required by the device when used for procuring).
It is also structured to show the current value (or setting) of each of the parameters that describe a spe-
cific instance of the device. This "current value" may also show a functional limitation of the device. For
example when implementing secure authentication it is not required that all DNP3 devices accept
aggressive mode requests during critical exchanges (see Device Profile section 1.12.4. ), in which case
a vendor would mark this current value as "No – does not accept aggressive mode requests".
Additionally, the current value may sometimes be used to show a value that a device can achieve
because of hardware or software dependencies. An example of this is section 1.6.8. of the Device Pro-
file (Maximum error in the time that the Master issues freeze requests) where this value may well
depend upon tolerances of hardware components and interactions between software tasks. When
the Device Profile current value is used in this way the corresponding entry in the capabilities column
is grayed-out. Users should note that if an entry in the capabilities column of the Device Profile is
grayed-out then there may be information in the current value column that is pertinent to the device's
capabilities.
Unless otherwise noted, multiple boxes in the second column below should be selected for each
parameter to indicate all capabilities supported or required. Parameters without checkboxes in the
second column do not have capabilities and are included so the current value may be shown in the
third column.
The items listed in the capabilities column below may be configurable to any of the options selected,
or set to a fixed value when the device was designed. Item 1.1.10. contains a list of abbreviations for
the possible ways in which the configurable parameters may be set. Since some parameters may not
be accessible by each of these methods supported, an abbreviation for the configuration methods
supported by each parameter is shown in the fourth column of the tables below.
If this document is used to show the current values, the third column should be filled in even if a fixed
parameter is selected in the capabilities section ("NA" may be entered for parameters that are Not
Applicable).
If this document is used to show the current value of each parameter, the "Current Value" column
applies to a single connection between a master and outstation. If the device has multiple or backup
connections to other DNP devices that you wish to show in the Device Profile Document, see clause
14.8.3.2 "ReferenceDevice and AuxillaryInfo" of the DNP3 Specification or duplicate the entire Device
Profile Document for each communication link to a logical or physical DNP3 Device.
ME-RTU Remote Terminal Unit A - 7