Eaton PXM4K Series User manual

Brand: Eaton

Model: PXM4K Series

Type: User manual

This manual is also suitable for

PXM 4/6/8K DNP3 Ethernet Communications User Manual

PXM 4/6/8K DNP3

Contents

PXM 4/6/8K DNP3 Ethernet Communications User Manual MN150005EN January 2017 www.eaton.com

Contents

1. INTRODUCTION ..................................................1

2. DNP3 PROTOCOL PRIMER .........................................1

2.1 Why DNP3? .......................................................1

2.2 Link Layer Responsibility .............................................5

2.3 Static and Event Data ...............................................6

2.4 Unsolicited Responses ..............................................7

2.5 Implementation Levels ..............................................7

2.6 Summary .........................................................7

3. DNP DEVICE PROFILE .............................................8

4. IMPLEMENTATION TABLE .........................................12

5. DNP3 ETHERNET COMMUNICATION SETUP CONFIGURATION UTILITY ..16

5.1 DNP3 Node Identification ...........................................17

5.2 Global Settings ...................................................18

5.3 Communication ...................................................19

5.4 DNP3 Input/Output Setup ...........................................23

5.5 Procedure to Create the DNP3 Database Configuration ....................25

5.6 Assigning a Dead Band .............................................28

APPENDIX A POINTS LIST ..........................................29

1. Introduction

PXM 4/6/8K DNP3 Ethernet Communications User Manual MN150005EN January 2017 www.eaton.com

1. Introduction

This document contains the Power Xpert

Meter (PXM

Meter) 4000/6000/8000 Series device Distributed Network

Protocol (DNP) 3 ethernet communication Level-2 device

profile along with a detailed explanation of the web utility to

configure DNP3 parameters of the PXM Meter.

ote:N The PXM 4/6/8K supports DNP3 ethernet communi-

cation. DNP3 serial communication is not supported.

2. DNP3 Protocol Primer

Acknowledgment: Base materials used in Section 2 of this

manual were provided by and used with the permission of

the DNP Users Group www.dnp.org.

This is a primer for Users who want a quick understand-

ing of DNP3 without having to comb through the tedious

details of a complex specification. The writing style is

meant to be informal and personal.

Let us start with what it is. Protocols define the rules by

which devices talk with each other, and DNP3 is a protocol

for transmission of data from point A to point B using serial

and IP communications. It has been used primarily by utili-

ties such as the electric and water companies, but it func-

tions well for other areas.

A typical electric company may have a common operations

center that monitors all of the equipment at each of its

substations. In the operations center, a powerful computer

stores all of the incoming data and displays the system for

the human operators. Substations have many devices that

need monitoring (Are circuit breakers opened or closed?),

current sensors (How many amperes are flowing?) and

voltage transducers (What is the line potential?). That only

scratches the surface. A utility is interested in monitor-

ing many parameters, too numerous to discuss here. The

operations personnel often need to switch sections of the

power grid into or out of service. Computers are situated

in substations to collect the data for transmission to the

master station in the operations center. The substation

computers are also called upon to energize or de-energize

the breakers and voltage regulators.

DNP3 uses the term outstation to denote remote comput-

ers as are found in the field. The term master is used for

the computers in the control centers.

DNP3 provides the rules for remotely located computers

and master station computers to communicate data and

control commands. DNP3 is a non-proprietary protocol that

is available to anyone by visiting the web site www.dnp.

org. Only a nominal fee is charged for documentation, but

otherwise it is available worldwide with no restrictions. This

means a utility can purchase master station and outsta-

tion computing equipment from any manufacturer and be

assured that they will reliably talk to each other. Vendors

compete based upon their computing equipment’s features,

costs and quality factors instead of who has the best pro-

tocol. Utilities are not bound to one manufacturer after the

initial sale.

What do the computers talk about? Outstation computers

gather data for transmission to the master.



Binary input data that is useful to monitor two-state

devices. For example, a circuit breaker is closed or

tripped; a pipeline pressure alarm shows normal or exces-

sive.



Analog input data that conveys voltages, currents, power,

reservoir water levels, and temperatures.



Count input data that reports energy in kilowatt hours or

fluid volume.



Files that contain configuration data.

The master station issues control commands that take the

form of:



Close or trip a circuit breaker, start or stop a motor, and

open or close a valve; and/or



Analog output values to set a regulated pressure or a

desired voltage level.

Other things the computers talk to each other about are

synchronizing the time and date, sending historical or

logged data, waveform data, and on and on.

2.1 Why DNP3?

DNP3 was designed to optimize the transmission of data

acquisition information and control commands from one

computer to another. It is not a general purpose protocol

like those found on the Internet for transmitting email,

hypertext documents, SQL queries, multimedia, and huge

files. It is intended for Supervisory Control and Data

Acquisition (SCADA) applications.

Readers should not assume this document contains formal rules, which are only provided by the DNP3 Specification volumes.

2. DNP3 Protocol Primer

PXM 4/6/8K DNP3 Ethernet Communications User Manual MN150005EN January 2017 www.eaton.com

2.1.1 Master and Outstation Databases

Figure 1 shows the master-outstation relationship and gives

a simplistic view of the databases and software processes

involved. The master is on the left side of Figure 1, and the

outstation is on the right side.

A series of square blocks at the top of the outstation depict

data stored in its database and output devices. The various

data types are conceptually organized as arrays. An array of

binary input values represents states of physical or logical

Boolean devices. Values in the analog input array represent

input quantities that the outstation measured or computed.

An array of counters represents count values, such as kilo-

watt hours, that are ever increasing (until they reach a maxi-

mum and then roll over to zero and start counting again).

Control outputs are organized into an array representing

physical or logical on-off, raise-lower, and trip-close points.

Lastly, the array of analog outputs represents physical or

logical analog quantities such as those used for set points.

Figure 1. Master and Outstation Relationship.

The elements of the arrays are labeled 0 through N - 1

where N is the number of blocks shown for the respective

data type. In DNP3 terminology, the element numbers are

called the point indexes. Indexes are zero-based in DNP3,

that is, the lowest element is always identified as zero.

Indexes are zero-based in DNP3, that is, the lowest element

is always identified as zero.

Notice that the DNP3 master also has a similar database

for the input data types (binary, analog and counter.) The

master uses values in its database for the specific purposes

of displaying system states, closed-loop control, alarm noti-

fication, billing, and much, much more. An objective of the

master is to keep its database updated. It accomplishes

this by sending requests to the outstation asking it to return

the values in the outstation’s database. This is termed

polling. The outstation responds to the master’s request

by transmitting the contents of its database. Arrows are

drawn at the bottom of Figure 1 showing the direction of

the requests (toward the outstation) and the direction of the

responses (toward the master). Later, we will discuss sys-

tems whereby the outstations transmit responses without

being asked.

2. DNP3 Protocol Primer

PXM 4/6/8K DNP3 Ethernet Communications User Manual MN150005EN January 2017 www.eaton.com

2.1.2 Layering

The master and the outstation shown in Figure 1 each have

two software layers. The top layer is the DNP3 user layer.

In the master, it is the software that interacts with the data-

base and initiates the requests for the outstation’s data. In

the outstation, it is the software that fetches the requested

data from the outstation’s database for responding to mas-

ter requests. It is interesting to note that if no physical

separation of the master and outstation existed, eliminating

the DNP3 might be possible by connecting these two upper

layers together. However, since physical, or possibly logi-

cal separation of the master and outstation exists, DNP3

software is placed at a lower level. The DNP3 User’s code

uses the DNP3 software for transmission of requests or

responses to the matching DNP3 User’s code at the other

end. More will be said about data types and software lay-

ers later, but first we want to examine a few typical system

architectures where DNP3 is used.

Figure 2. Common System Architectures.

2.1.3 System Architecture

Figure 2 shows common system architectures in use

today. At the top is a simple one-on-one system having

one master station and one outstation. The physical con-

nection between the two is typically a dedicated or dial-up

telephone line.

The second type of system is known as a multi-drop design.

One master station communicates with multiple outstation

devices. Conversations are typically between the master

and one outstation at a time. The master requests data

from the first outstation, then moves onto the next outsta-

tion for its data, and continually interrogates each outsta-

tion in a round robin order. The communication media is

a multi-dropped telephone line, fiber optic cable, or radio.

Each outstation can hear messages from the master and

is only permitted to respond to messages addressed to it.

Outstations may or may not be able to hear each other.

2. DNP3 Protocol Primer

PXM 4/6/8K DNP3 Ethernet Communications User Manual MN150005EN January 2017 www.eaton.com

In some multi-drop forms, communications are peer-to-peer.

A station may operate as a master for gathering information

or sending commands to the outstation in another station.

And then, it may change roles to become an outstation to

another station.

The middle row in Figure 2 shows a hierarchical type sys-

tem where the device in the middle is an outstation to the

master at the left and is a master with respect to the out-

station on the right. The middle device is often termed a

sub-master.

Both lines at the bottom of Figure 2 show data concentrator

applications and protocol converters. A device may gather

data from multiple outstations on the right side of the figure

and store this data in its database where it is retrievable by

a master station on the left side of the figure. This design is

often seen in substations where the data concentrator col-

lects information from local intelligent devices for transmis-

sion to the master station.

Figure 3. Master and Outstation Relationship – Layering.

2.1.4 TCP/IP

Many vendors offer products that operate using TCP/IP to

transport DNP3 messages in lieu of the media discussed

above. Link layer frames, which we have not talked about

yet, are embedded into TCP/IP packets. This approach has

enabled DNP3 to take advantage of Internet technology and

permitted economical data collection and control between

widely separated devices.

2.1.5 More On Layering

Communication circuits between the devices are often

imperfect. They are susceptible to noise and signal distor-

tion. DNP3 software is layered to provide reliable data

transmission and to affect an organized approach to the

transmission of data and commands. Figure 3 shows the

layering that was not shown in Figure 1.

2. DNP3 Protocol Primer

PXM 4/6/8K DNP3 Ethernet Communications User Manual MN150005EN January 2017 www.eaton.com

2.2 Link Layer Responsibility

The link layer has the responsibility of making the physical

link reliable. It does this by providing error detection and

duplicate frame detection. The link layer sends and receives

packets, which in DNP3 terminology are called frames.

Sometimes transmission of more than one frame is neces-

sary to transport all of the information from one device to

another.

A DNP3 frame consists of a header and data section. The

header specifies the frame size, contains data link control

information and identifies the DNP3 source and destination

device addresses. The data section is commonly called the

payload and contains data passed down from the layers

above.

DNP3 Frame

Header Data Section

Header

Sync Length Link Control Destination Source CRC

Figure 4. DNP3 Header and Data Sections.

Every frame begins with two sync bytes that help the

receiver determine where the frame begins. The length

specifies the number of octets in the remainder of the

frame, not including CRC check octets. The link control

octet is used for the sending and receiving link layers to

coordinate their activities.

2.2.1 Addressing

The destination address specifies which DNP3 device

should process the data, and the source address identi-

fies which DNP3 device sent the message. Having both

destination and source addresses satisfies at least one

requirement for peer-to-peer communications because the

receiver knows where to direct its responses. 65,520 indi-

vidual addresses are available. Every DNP3 device must

have a unique address within the collection of devices send-

ing and receiving messages to and from each other. Three

destination addresses are reserved by DNP3 to denote an

all-call message; that is, the frame should be processed

by all receiving DNP3 devices. One address is a universal

address, the details of which are not given here, and twelve

addresses are reserved for special needs in the future.

2.2.2 CRC Checks

The data payload in the link frame contains a pair of CRC

octets for every 16 data octets. This provides a high degree

of assurance that communication errors can be detected.

The maximum number of octets in the data payload is 250,

not including CRC octets. (The maximum length link layer

frame is 292 octets if all the CRC and header octets are

counted.)

2.2.3 Link Layer Confirmation

One often hears the term “link layer confirmation” when

DNP3 is discussed. A feature of DNP3’s link layer is the

ability for the transmitter of the frame to request the receiv-

er to confirm that the frame arrived. Using this feature is

optional, and it is often not employed because there are

other methods for confirming receipt of data. It provides

an extra degree of assurance of reliable communications.

If a confirmation is not received, the link layer may retry

the transmission. Some disadvantages to using link layer

confirmation are the extra time required for confirmation

messages and waiting for multiple timeouts when retries

are configured.

2.2.4 Transport Layer

The transport layer has the responsibility of breaking long

application layer messages into smaller packets sized for the

link layer to transmit, and, when receiving, to reassemble

frames into longer application layer messages. In DNP3 the

transport layer is incorporated into the application layer. The

transport layer requires only a single octet overhead to do

its job. Therefore, since the link layer can handle only 250

data octets, and one of those is used for the transport func-

tion, each link layer frame can hold as many as 249 applica-

tion layer octets.

2.2.5 Application Layer Fragments

Application layer messages are broken into fragments.

Maximum fragment size is determined by the size of the

receiving device’s buffer. The normal range is 2048 to 4096

bytes. A message that is larger than one fragment requires

multiple fragments. Fragmenting messages is the responsi-

bility of the application layer.

Note that an application layer fragment of size 2,048 must

be broken into 9 frames by the transport layer, and a frag-

ment size of 4,096 needs 17 frames. Interestingly, it has

been learned by experience that communications are some-

times more successful for systems operating in high noise

environments if the fragment size is significantly reduced.

2. DNP3 Protocol Primer

PXM 4/6/8K DNP3 Ethernet Communications User Manual MN150005EN January 2017 www.eaton.com

2.3 Static and Event Data

The application layer works together with the transport and

link layers to enable reliable communications. It provides

standardized functions and data formatting with which

the user layer above can interact. Before functions, data

groups, and variations can be discussed, the terms static,

events, and classes need to be covered.

In DNP3, the term static is used with data and refers to the

present value. Thus static binary input data refers to the

present On or Off state of a bi-state device. Static analog

input data contains the value of an analog at the instant it

is transmitted. One possibility DNP3 allows is requesting

some or all of the static data in an outstation device.

DNP3 events are associated with something significant

happening. Examples are state changes, values exceeding

some threshold, snapshots of varying data, transient data,

and newly available information. An event occurs when a

binary input changes from an On to an Off state or when

an analog value changes by more than its configured dead-

band limit. DNP3 provides the ability to report events with

and without time stamps so that, if desired, the master will

have the information to generate a time sequence report.

The master’s user layer can direct DNP3 to request events.

Usually, a master is updated more rapidly if it spends most

of its time polling for events from the outstation and only

occasionally asks for static data as an integrity measure.

The reason updates are faster is because the number of

events generated between outstation interrogations is small

and, therefore, less data must be returned to the master.

DNP3 goes a step further by classifying events into three

classes. When DNP3 was conceived, class 1 events were

considered as having higher priority than class 2 events,

and class 2 were higher than class 3 events. While that

scheme can be still be configured, some DNP3 Users have

developed other strategies more favorable to their opera-

tion for assigning events into the classes. The user layer

can request the application layer to poll for class 1, 2, or 3

events or any combination of them.

2.3.1 Variations

DNP3 has provisions for representing data in different

formats. Examination of analog data formats is helpful to

understand the flexibility of DNP3. Static, present value,

analog data can be represented by variation numbers as fol-

lows:

1. A 32-bit integer value with flag;

2. A 16-bit integer value with flag;

3. A 32-bit integer value;

4. A 16-bit integer value;

5. A 32-bit floating point value with flag; and

6. A 64-bit floating point value with flag.

ote:N The flag referred to is a single octet with bit fields

indicating whether the source is on-line, the data

source restarted, communications are lost with a

downstream source, the data is forced and the value

is over range.

Not all DNP3 devices can transmit or interpret all six varia-

tions. Later, DNP3 levels are discussed, but for now, suffice

it to say that DNP3 devices must be able to transmit the

simplest variations so that any receiver can interpret the

contents.

Event analog data can be represented by these variations:

1. A 32-bit integer value with flag;

2. A 16-bit integer value with flag;

3. A 32-bit integer value with flag and event time;

4. A 16-bit integer value with flag and event time;

5. A 32-bit floating point value with flag;

6. A 64-bit floating point value with flag;

7. A 32-bit floating point value with flag and event time;

and

8. A 64-bit floating point value with flag and event time.

The flag has the same bit fields as for the static variations.

2.3.2 Group

It appears by looking at the above variations that variation 1

and 2 analog events cannot be differentiated from variation

1 and 2 static analog values. DNP3 solves this predica-

ment by assigning group numbers. Static analog values are

assigned as group 30, and event analog values are assigned

as group 32. Static analog values, group 30, can be format-

ted in one of 6 variations, and event analog values, group

32, can be formatted in one of 8 variations.

When a DNP3 outstation transmits a message containing

response data, the message identifies the group number

and variation of every value within the message. Group and

variation numbers are also assigned for counters, binary

inputs, controls and analog outputs. In fact, all valid data

types and formats in DNP3 are identified by group and

variation numbers. Defining the allowable groups and varia-

tions helps DNP3 assure interoperability between devices.

DNP3’s basic documentation contains a library of valid

groups and their variations.

2.3.3 Objects

When data from an index is transmitted across the wire,

the sender must suitably encode the information to enable

a receiving device to parse and properly interpret this data.

The bits and bytes for each index appearing in the mes-

sage are called an object. That is, objects in the message

are the encoded representation of the data from a point, or

other structure, and the object format depends upon which

group and variation number are chosen.

2. DNP3 Protocol Primer

PXM 4/6/8K DNP3 Ethernet Communications User Manual MN150005EN January 2017 www.eaton.com

2.3.4 Reading Data

The master’s user layer formulates its request for data from

the outstation by telling the application layer what function

to perform, such as reading, and by specifying the data

types it wants from the outstation. The request can specify

how many objects it wants or it can specify specific objects

or a range of objects from index number X through index

number Y. The application layer then passes the request

down through the transport layer to the link layer that, in

turn, sends the message to the outstation. The link layer

at the outstation checks the frames for errors and passes

them up to the transport layer where the complete mes-

sage is assembled in the outstation’s application layer. The

application layer then tells its user layer which groups and

variations were requested.

Responses work similarly, in that the outstation’s user layer

fetches the desired data and presents it to the application

layer that, in turn, uses the group and variation numbers to

format user layer data into objects. Data is then passed

downward, across the communication channel and upward

to the master’s application layer. Here the data objects are

then presented to the master’s user layer.

2.3.5 Other Functions

Reading data was briefly described in Section 2.3.4, but

DNP3 software is designed to handle other functions. For

one, the master can set the time in the outstation. The

master can transmit freeze accumulator requests, and it

can transmit requests for control operations and setting of

analog output values using select-before-operate or direct-

operate sequences.

2.4 Unsolicited Responses

One area that has not been covered yet is transmission of

unsolicited messages. This is a mode of operating where

the outstation spontaneously transmits a response without

having received a specific request for the data. Not all out-

stations have this capability. This mode is useful when the

system has many outstations and the master requires noti-

fication as soon as possible after a change occurs. Rather

than waiting for a master station polling cycle to get around

to it, the outstation simply transmits the change.

Before configuring a system for unsolicited messages,

a few basics need to be considered. First, spontaneous

transmissions should generally occur infrequently, other-

wise, too much contention can occur, and controlling media

access via master station polling would be better. The sec-

ond basic issue is that the outstation should have some way

of knowing whether it can transmit without stepping on

another outstation’s message. DNP3 leaves specification of

algorithms to the system implementer.

2.5 Implementation Levels

One last area of discussion involves implementation levels.

The DNP3 organization recognizes that supporting every

feature of DNP3 is not necessary for every device. Some

devices are limited in memory and speed and do not need

specific features, while other devices must have the more

advanced features to accomplish their task. DNP3 orga-

nizes complexity into three levels. At the lowest level, level

1, only very basic functions must be provided and all others

are optional. Level 2 handles more functions, groups, and

variations, and level 3 is even more sophisticated. Within

each level, only certain combinations of request formats and

response formats are required. This was done to limit soft-

ware code in masters and outstations while still assuring

interoperability.

2.6 Summary

It should be apparent by now that DNP3 is a protocol that

fits well into the data acquisition world. It transports data

as generic values, it has a rich set of functions, and it was

designed to work in a wide area communications network.

The standardized approach of groups and variations, and

link, transport and application layers, plus public availability

makes DNP3 a protocol to be regarded.

3. DNP Device Proﬁle

PXM 4/6/8K DNP3 Ethernet Communications User Manual MN150005EN January 2017 www.eaton.com

3. DNP Device Proﬁle

DNP V3.0

DEVICE PROFILE DOCUMENT

This document must be accompanied by a table having the following headings:

Object Group Request Funcon Codes Response Funcon Codes

Object Variaon Request Qualiﬁers Response Qualiﬁers

Object Name (oponal)

Vendor Name: Eaton

Device Name: Power Expert Meter 4k/6k/8k

Highest DNP Level Supported:

For Requests : Level 2

For Responses : Level 2

Device Funcon:

 Master



Slave

Notable objects, funcons, and/or qualiﬁers supported in addion to the Highest DNP Levels Supported.

For stac (non-change-event) object requests, request qualiﬁer codes 07 and 08 (limited quanty), and 17

and 28 (index) are supported.

16-

16-bit and 32-bit Analog Change Events with Time are supported.

Floang Point Analog Output Status and Output Block Objects 40 are supported.

The read funcon code for Object 50 (Time and Date), variaon 1, is supported.

Maximum Data Link Frame Size (octets):

 Transmied: 292

 Received : 292

Maximum Applicaon Fragment Size (octets):

 Transmied: Conﬁgurable up-to 2048

 Received : 2048

Maximum Data Link Re-tries:

 None

 Fixed at ____



Conﬁgurable from 0 to 15

Maximum Applicaon Layer Re-tries:



None

 Conﬁgurable



3. DNP Device Proﬁle

PXM 4/6/8K DNP3 Ethernet Communications User Manual MN150005EN January 2017 www.eaton.com

Requires Data Link Layer Conﬁrmaon:

 Never

 Always

 Somemes



Conﬁgurable as:

 When reporng Event Data.

 When sending mul-fragment responses.

Requires Applicaon Layer Conﬁrmaon:

 Never

 Always

 When reporng Event Data

 When sending mul-fragment responses

 Somemes



Conﬁgurable as: “Only when reporng Event Data” or “When reporng event data and mul

fragment messages”.

Timeouts while waing for:

 Data Link Conﬁrm : None Fixed at ____  Variable 

Conﬁgurable.

 Complete Appl. Fragment : 

None Fixed at ____  Variable  Conﬁgurable.

 Applicaon Conﬁrm :  None 

Fixed at 10 Sec  Variable  Conﬁgurable.

 Complete Appl. Response : 

None Fixed at ____  Variable  Conﬁgurable.

Others:



Transmission Delay, conﬁgurable



Select/Operate Arm Timeout, conﬁgurable 0 sec to 30 sec



Need Time Interval, conﬁgurable 1 sec to 86400 sec (1 day)



Data Link Conﬁrm Timeout, conﬁgurable 0.1 sec to 30 sec



Binary Change Event Scan Period, ﬁxed at 1 sec



Analog Change Event Scan Period, ﬁxed at 1 sec

 Counter Change Event Scan Period, ﬁxed at 1 sec



Frozen Counter Change Event Scan Period, ﬁxed at 1 sec



3. DNP Device Proﬁle

PXM 4/6/8K DNP3 Ethernet Communications User Manual MN150005EN January 2017 www.eaton.com

Sends/Executes Control Operaons:

Reports Binary Input Change Events when no

speciﬁc variaon requested:

 Never

 Only me-tagged

 Only non-me-tagged



Conﬁgurable to send both, one or the

other

Reports me-tagged Binary Input Change

Events when no speciﬁc variaon requested:

 Never

 Binary Input Change With Time

 Binary Input Change With Relave

Time



Conﬁgurable to Binary Input Change

With Time and Binary Input Change With Relave Time

Sends Unsolicited Responses:

 Never

 Conﬁgurable

 Only certain objects

 Somemes

 ENABLE/DISABLE UNSOLICITED

Sends Stac Data in Unsolicited Responses:



Never

 When Device Restarts

 When Status Flags Change

No other opons are permied.



3. DNP Device Proﬁle

PXM 4/6/8K DNP3 Ethernet Communications User Manual MN150005EN January 2017 www.eaton.com

Default Counter Object/Variaon:

 No Counters Reported



Conﬁgurable

 Default

 Object

 Variaon

 Point-by-point list aached

Counters Roll Over at:

 No Counters Reported

 Conﬁgurable



16 Bits



32 Bits

 Other Value: _____

 Point-by-point list aached

Sends Mul-Fragment Responses:

 Yes

 No



Conﬁgurable as: “Always” or “When reporng Event Data”

Sequenal File Transfer Support:

Append File Mode :  Yes  No

Custom Status Code Strings :  Yes 

Permissions Field :  Yes 

File Events Assigned to Class :  Yes 

File Events Send Immediately :  Yes 

Mulple Blocks in a Fragment:  Yes 

Max Number of Files Open : 0

4. Implementation Table

PXM 4/6/8K DNP3 Ethernet Communications User Manual MN150005EN January 2017 www.eaton.com

4. Implementation Table

The following table identifies which object variations, func-

tion codes, and qualifiers the PXM 4/6/8 K meter supports

in both request messages and in response messages.

For static (non-change-event) objects, requests sent with

qualifiers 00, 01, 06, 07, or 08, will be responded with quali-

fiers 00 or 01. Requests sent with qualifiers 17 or 28 will

be responded with qualifiers 17 or 28. For change-event

objects, qualifiers 17 or 28 are always responded.

Table 1. Object Variations, Function Codes, and Qualifiers.

Object

REQUEST

Master May Issue

Outstation Must Parse

RESPONSE

Master Must Parse

Outstation May Issue

Object

Number

Variation

Number Description

Function Codes

(dec)

Qualifier Codes

(hex)

Function Codes

(dec) Qualifier Codes (hex)

1 0 Binary Input – Any Variation 1 (read) 00, 01 (start-stop)

06 (no range, or all)

07, 08 (limited qty)

17, 28 (index)

1 1 (default –

see note 1)

Binary Input 1 (read) 00, 01 (start-stop)

06 (no range, or all)

07, 08 (limited qty)

17, 28 (index)

129 (response) 00, 01 (start-stop)

17, 28 (index –see

note 2)

1 2 Binary Input with Status 1 (read) 00, 01 (start-stop)

06 (no range, or all)

07, 08 (limited qty)

17, 28 (index)

129 (response) 00, 01 (start-stop)

17, 28 (index –see

note 2)

2 0 Binary Input Change – Any Variation 1 (read) 06 (no range, or all)

07, 08 (limited qty)

2 1 Binary Input Change without Time 1 (read) 06 (no range, or all)

07, 08 (limited qty)

129 (response) 17, 28 (index)

2 2 Binary Input Change with Time 1 (read) 06 (no range, or all)

07, 08 (limited qty)

129 (response) 17, 28 (index)

10 0 Binary Output – Any Variation 1 (read) 00, 01 (start-stop)

06 (no range, or all)

07, 08 (limited qty)

17, 27, 28 (index)

10 1 Binary Output 1 (read) 00, 01 (start-stop)

06 (no range, or all)

07, 08 (limited qty)

17, 27, 28 (index)

129 (response) 00, 01 (start-stop)

17, 28 (index –see

note 1)

10 2 (default –

see note 1)

Binary Output Status 1 (read) 00, 01 (start-stop)

06 (no range, or all)

07, 08 (limited qty)

17, 28 (index)

129 (response) 00, 01 (start-stop)

17, 28 (index –see

note 2)

12 1 Control Relay Output Block 3 (select)

4 (operate)

5 (direct op)

6 (dir. op, noack)

17, 28 (index) 129 (response) Echo of request

20 0 Binary Counter – Any Variation 1 (read) 00, 01 (start-stop)

06 (no range, or all)

07, 08 (limited qty)

17, 28 (index)

7 (freeze)

8 (freeze no ack)

00, 01 (start-stop)

06 (no range, or all)

07, 08 (limited qty)

4. Implementation Table

PXM 4/6/8K DNP3 Ethernet Communications User Manual MN150005EN January 2017 www.eaton.com

Object

REQUEST

Master May Issue

Outstation Must Parse

RESPONSE

Master Must Parse

Outstation May Issue

Object

Number

Variation

Number Description

Function Codes

(dec)

Qualifier Codes

(hex)

Function Codes

(dec) Qualifier Codes (hex)

20 1 32-Bit Binary Counter (with Flag) 1 (read) 00, 01 (start-stop)

06 (no range, or all)

07, 08 (limited qty)

17, 28 (index)

129 (response) 00, 01 (start-stop)

17, 28 (index –see

note 2)

20 2 16-Bit Binary Counter (with Flag) 1 (read) 00, 01 (start-stop)

06 (no range, or all)

07, 08 (limited qty)

17, 28 (index)

129 (response) 00, 01 (start-stop)

17, 28 (index –see

note 2)

20 5 32-Bit Binary Counter without Flag 1 (read) 00, 01 (start-stop)

06 (no range, or all)

07, 08 (limited qty)

17, 28 (index)

129 (response) 00, 01 (start-stop)

17, 28 (index –see

note 2)

20 6 16-Bit Binary Counter without Flag 1 (read) 00, 01 (start-stop)

06 (no range, or all)

07, 08 (limited qty)

17, 28 (index)

129 (response) 00, 01 (start-stop)

17, 28 (index –see

note 2)

21 0 Frozen Counter – Any Variation 1 (read) 00, 01 (start-stop)

06 (no range, or all)

07, 08 (limited qty)

17, 28 (index)

21 1 32-Bit Frozen Counter (with Flag) 1 (read) 00, 01 (start-stop)

06 (no range, or all)

07, 08 (limited qty)

17, 28 (index)

129 (response) 00, 01 (start-stop)

17, 28 (index –see

note 2)

21 2 16-Bit Frozen Counter (with Flag) 1 (read) 00, 01 (start-stop)

06 (no range, or all)

07, 08 (limited qty)

17, 28 (index)

129 (response) 00, 01 (start-stop)

17, 28 (index –see

note 2)

21 5 32-Bit Frozen Counter with Time Of

Freeze

1 (read) 00, 01 (start-stop)

06 (no range, or all)

129 (response) 00, 01 (start-stop)

17, 28 (index –see

note 1)

21 6 16-Bit Frozen Counter with Time Of

Freeze

1 (read) 00, 01 (start-stop)

06 (no range, or all)

129 (response) 00, 01 (start-stop)

17, 28 (index –see

note 1)

21 9 (default –

see note 1)

32-Bit Frozen Counter without Flag 1 (read) 00, 01 (start-stop)

06 (no range, or all)

129 (response) 00, 01 (start-stop)

17, 28 (index –see

note 2)

21 10 16-Bit Frozen Counter without Flag 1 (read) 00, 01 (start-stop)

06 (no range, or all)

129 (response) 00, 01 (start-stop)

17, 28 (index –see

note 2)

22 0 Counter Change Event – Any Variation 1 (read) 06 (no range, or all)

07, 08 (limited qty)

22 1 (default –

see note 1)

32-Bit Counter Change Event without

Time

1 (read) 06 (no range, or all)

07, 08 (limited qty)

129 (response) 17, 28 (index)

22 2 16-Bit Counter Change Event without

Time

1 (read) 06 (no range, or all)

07, 08 (limited qty)

129 (response) 17, 28 (index)

22 5 32-Bit Counter Change Event with Time 1 (read) 06 (no range, or all)

07, 08 (limited qty)

129 (response) 17, 28 (index)

22 6 16-Bit Counter Change Event with Time 1 (read) 06 (no range, or all)

07, 08 (limited qty)

129 (response) 17, 28 (index)

4. Implementation Table

PXM 4/6/8K DNP3 Ethernet Communications User Manual MN150005EN January 2017 www.eaton.com

Object

REQUEST

Master May Issue

Outstation Must Parse

RESPONSE

Master Must Parse

Outstation May Issue

Object

Number

Variation

Number Description

Function Codes

(dec)

Qualifier Codes

(hex)

Function Codes

(dec) Qualifier Codes (hex)

23 0 Frozen Counter Event (Variation 0 is

used to request default variation)

1 (read) 06 (no range, or all)

07, 08 (limited qty)

23 1 (default –

see note 1)

32-Bit Frozen Counter Event 1 (read) 06 (no range, or all)

07, 08 (limited qty)

129 (response) 17, 28 (index)

23 2 16-Bit Frozen Counter Event 1 (read) 06 (no range, or all)

07, 08 (limited qty)

129 (response) 17, 28 (index)

23 5 32-Bit Frozen Counter Event with Time 1 (read) 06 (no range, or all)

07, 08 (limited qty)

129 (response) 17, 28 (index)

23 6 16-Bit Frozen Counter Event with Time 1 (read) 06 (no range, or all)

07, 08 (limited qty)

129 (response) 17, 28 (index)

30 0 Analog Input - Any Variation 1 (read) 00, 01 (start-stop)

06 (no range, or all)

07, 08 (limited qty)

17, 28 (index)

30 1 32-Bit Analog Input 1 (read) 00, 01 (start-stop)

06 (no range, or all)

07, 08 (limited qty)

17, 28 (index)

129 (response) 00, 01 (start-stop)

17, 28 (index –see

note 2)

30 2 16-Bit Analog Input 1 (read) 00, 01 (start-stop)

06 (no range, or all)

07, 08 (limited qty)

17, 28 (index)

129 (response) 00, 01 (start-stop)

17, 28 (index –see

note 2)

30 3 (default –

see note 1)

32-Bit Analog Input without Flag 1 (read) 00, 01 (start-stop)

06 (no range, or all)

07, 08 (limited qty)

17, 28 (index)

129 (response) 00, 01 (start-stop)

17, 28 (index –see

note 2)

30 4 16-Bit Analog Input without Flag 1 (read) 00, 01 (start-stop)

06 (no range, or all)

07, 08 (limited qty)

17, 28 (index)

129 (response) 00, 01 (start-stop)

17, 28 (index –see

note 2)

30 5 Short floating point 1 (read) 00, 01 (start-stop)

06 (no range, or all)

07, 08 (limited qty)

17, 28 (index)

129 (response) 00, 01 (start-stop)

17, 28 (index –see

note 2)

32 0 Analog Change Event – Any Variation 1 (read) 06 (no range, or all)

07, 08 (limited qty)

32 1 (default –

see note 1)

32-Bit Analog Change Event without

Time

1 (read) 06 (no range, or all)

07, 08 (limited qty)

129 (response) 17, 28 (index)

32 2 16-Bit Analog Change Event without

Time

1 (read) 06 (no range, or all)

07, 08 (limited qty)

129 (response) 17, 28 (index)

32 3 32-Bit Analog Change Event with Time 1 (read) 06 (no range, or all)

07, 08 (limited qty)

129 (response) 17, 28 (index)

32 4 16-Bit Analog Change Event with Time 1 (read) 06 (no range, or all)

07, 08 (limited qty)

129 (response) 17, 28 (index)

32 5 Short floating point Analog Change

Event without Time

1 (read) 06 (no range, or all)

07, 08 (limited qty)

129 (response) 17, 28 (index)

32 7 Short floating point Analog Change

Event with Time

1 (read) 06 (no range, or all)

07, 08 (limited qty)

129 (response) 17, 28 (index)

4. Implementation Table

PXM 4/6/8K DNP3 Ethernet Communications User Manual MN150005EN January 2017 www.eaton.com

Object

REQUEST

Master May Issue

Outstation Must Parse

RESPONSE

Master Must Parse

Outstation May Issue

Object

Number

Variation

Number Description

Function Codes

(dec)

Qualifier Codes

(hex)

Function Codes

(dec) Qualifier Codes (hex)

34 0 Analog Input Dead band (Variation 0 is

used to request default variation)

1 (read) 00, 01 (start-stop)

06 (no range, or all)

07, 08 (limited qty)

17, 28 (index)

34 1 16 bit Analog Input Dead band 1 (read) 00, 01 (start-stop)

06 (no range, or all)

07, 08 (limited qty)

17, 28 (index)

129 (response) 00, 01 (start-stop)

17, 28 (index –see

note 2)

2 (write) 00, 01 (start-stop)

07, 08 (limited qty)

17, 28 (index)

34 2 (default –

see note 1)

32 bit Analog Input Deadband 1 (read) 00, 01 (start-stop)

06 (no range, or all)

07, 08 (limited qty)

17, 28 (index)

129 (response) 00, 01 (start-stop)

17, 28 (index –see

note 2)

2 (write) 00, 01 (start-stop)

07, 08 (limited qty)

17, 28 (index)

40 0 Analog Output Status 1 (read) 00, 01 (start-stop)

06 (no range, or all)

07, 08 (limited qty)

17, 28 (index)

40 1 32-Bit Analog Output Status 1 (read) 00, 01 (start-stop)

06 (no range, or all)

07, 08 (limited qty)

17, 28 (index)

129 (response) 00, 01 (start-stop)

17, 28 (index –see

note 2)

40 2 (default –

see note 1

16-Bit Analog Output Status 1 (read) 00, 01 (start-stop)

06 (no range, or all)

07, 08 (limited qty)

17, 28 (index)

129 (response) 00, 01 (start-stop)

17, 28 (index –see

note 2)

40 3 Short floating point Analog Output

Status

1 (read) 00, 01 (start-stop)

06 (no range, or all)

07, 08 (limited qty)

17, 28 (index)

129 (response) 00, 01 (start-stop)

17, 28 (index –see

note 2)

50 0 Time and Date

50 1 (default –

see note 1

Time and Date 1 (read) 07, (limited qty = 1) 129 (response) 07 (limited qty = 1)

2 (write) 07, (limited qty = 1)

60 1 Class 0 Data 1 (read) 06 (no range, or all)

60 2 Class 1 Data 1 (read) 06 (no range, or all)

07, 08 (limited qty)

60 3 Class 2 Data 1 (read) 06 (no range, or all)

07, 08 (limited qty)

60 4 Class 3 Data 1 (read) 06 (no range, or all)

07, 08 (limited qty)

80 1 Internal Indications 1 (read) 00, 01 (start-stop) 129 (response) 00, 01 (start-stop)

Note 1: A default variation refers to the variation responded when variation 0 is requested and/or in class 0, 1, 2, or 3 scans. Default variations are configurable; however, default set-

tings for the configuration parameters are indicated in the table above.

Note 2: For static (non-change-event) objects, qualifiers 17 or 28 are only responded when a request is sent with qualifiers 17 or 28, respectively. Otherwise, static object requests

sent with qualifiers 00, 01, 06, 07, or 08, will be responded with qualifiers 00 or 01. (For change-event objects, qualifiers 17 or 28 are always responded.)

Note 3: Writes of Internal Indications are only supported for index 4 or 7 (Need Time IIN1-4 or Restart IIN1-7)

5. DNP3 Ethernet Communication Setup Conﬁguration Utility

PXM 4/6/8K DNP3 Ethernet Communications User Manual MN150005EN January 2017 www.eaton.com

5. DNP3 Ethernet Communication Setup

Conﬁguration Utility

It is necessary to configure DNP parameters and DNP data-

base to match specific requirements/needs of an applica-

tion. A simple, easy to use web based interface is provided

to configure DNP parameters and database as per user

requirement. Installer can get connected to meter by enter-

ing IP address of meter in a web browser. No separate

software installation is required to configure DNP3 stack.

Below sections explain each steps of DNP3 configuration in

detail.

Figure 5. DNP3 Setup Page.

DNP3 configuration setup is located at Setup -> Meter

Setup & commissioning -> Communication -> Ethernet /

LAN Setup -> DNP3 Setup.

DNP3 setup is divided in subpages as per category

explained below.

5. DNP3 Ethernet Communication Setup Conﬁguration Utility

PXM 4/6/8K DNP3 Ethernet Communications User Manual MN150005EN January 2017 www.eaton.com

5.1 DNP3 Node Identification

Figure 6. DNP3 Node Identification Page.

If the User wishes to change parameters’ then the User

first needs to press “Edit” option and “Authenticate” self to

avoid unauthorized access. After Authentication, the param-

eters shall be editable as shown in Figure 7.

Figure 7. DNP3 Setup Edit Page.

5. DNP3 Ethernet Communication Setup Conﬁguration Utility

PXM 4/6/8K DNP3 Ethernet Communications User Manual MN150005EN January 2017 www.eaton.com

The User can set three parameters:

1. DNP Master Address

It is the address of DNP master with which the PXM

meter shall exchange DNP3 data. This address shall be

validated by PXM meter and responses shall be sent

ONLY if a request is sent by the DNP master with this

address. This address shall be used in DNP3 source

field in DNP frames from master to slave.

2. PXM Meter Address

This is the DNP3 address with which the DNP3 mas-

ter device shall identify the specific PXM meter in the

DNP network. This address shall be used in the DNP3

destination field in DNP frames from master to slave.

The PXM meter shall match the destination address in

the received frame and the User assigned PXM meter

address. If a match is found, then the frame shall be

processed further.

3. User Assigned ID/Code

The User can assign a name to the PXM meter for

identification. This helps in easy identification of the

PXM meter location by the user instead of remember-

ing the meter by the DNP3 address.

ote:N PXM DNP3 implementation uses port 20,000 for its

communication. This port is not configurable and is

fixed. To communicate with PXM meter over TCP/IP

DNP, the master must use 20,000 as port number.

5.2 Global Settings

When this page is selected, the User can configure the fol-

lowing parameters.

1. DNP Select Operation Timeout

This parameter is used for Select-Before-Operate (SBO)

operation on digital outputs (relays). If the SBO mode is

used by the master to operate meter’s digital outputs, then

“DNP Select operation timeout” parameter is used. In this

particular operation, the DNP3 master first sends a select

request for particular digital output. When this request is

received, the PXM meter starts a timer for duration speci-

fied by “DNP Select operation timeout” parameter. If the

operate command is received from DNP3 master before

this timer elapses, then that digital output is operated as

per the master request.

If this timer expires before the operate request is received,

then the operate request is rejected by PXM meter.

ote:N It is necessary that the digital I/O card is installed in

the PXM meter to use this option. SBO operation is

supported only on relays R1, R2, and R3 and these

relays should be selected in the DNP input output

section as explained later in this document.

2. DNP Default Object X Variation ( X =1, 2, 10, 20, 21, 22,

23, 30, 32, 34, 40)

The DNP3 master may send requests to get the DNP3

slave data (PXM data) objects with variation 0. In this

case, the meter can send responses with the default

variation. It is possible to configure object wise default

variation for the PXM meter on web page. The User

can select the default variation from the drop down list

given against each object.

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