Dent Instruments PS24-D-S, PS24-N-E, PS24-N-S, PS24-D-E User manual

Operator’s Guide

™

PowerScout

Power Meter

Includes:

ViewPoint™ 4.0 Software

24

October 23, 2014

Find Quality Products Online at: [e-mail]

www.GlobalTestSupply.com

Operator’s Guide: PowerScout™ Power Meters ©2014 DENT Instruments, Inc. All rights reserved.
This manual may not be reproduced or distributed without written permission from DENT Instruments.
PowerScout™, ViewPoint™, and PhaseChek™ are trademarks of DENT Instruments, Inc. Windows®,

Windows® Vista, Windows® 7, Windows® 8, Windows® XP, and Notepad® are registered trademarks of
Microsoft Corporation.

DENT Instruments | 925 SW Emkay Dr. | Bend, Oregon 97702 USA

Phone [phone] | Fax [phone] | www.DENTInstruments.com

Find Quality Products Online at: [e-mail]

www.GlobalTestSupply.com

ii

Table of Contents

INTRODUCTION .......................................................................................................................... 6

PowerScout 24 Serial/PowerScout 24 Ethernet ...................................................................................... 6

Unpacking the Unit .................................................................................................................................. 6

Meter Anatomy ....................................................................................................................................... 8

PowerScout Meter Safety Summary and Specifications ......................................................................... 9

Symbols on Equipment ............................................................................................................................ 9

PowerScout Résumé de Sécurité et Spécifications ............................................................................... 11

Symboles des Equipements ................................................................................................................... 11

PowerScout 24 Technical Specifications ................................................................................................ 13

PREPPING FOR FIELD INSTALLATION .............................................................................................. 15

Installing the ViewPoint Software ......................................................................................................... 15

Connecting a Communication Cable...................................................................................................... 16

Connecting and Communicating via a USB or RS-485 Adapter ........................................................................16

Addressing an Element .....................................................................................................................................21

Connecting and Communicating via an Ethernet (TCP/IP) Connection ...........................................................22

Communications LEDs ........................................................................................................................... 25

PS24 Serial/Ethernet ........................................................................................................................................25

Meter Setup ........................................................................................................................................... 25

Entering Wiring Information for an Element ...................................................................................................27

Selecting a Scalar ..............................................................................................................................................29

Comms Setup ......................................................................................................................................... 31

RS-485 Settings.................................................................................................................................................32

BACnet Device Settings ....................................................................................................................................32

Ethernet Settings ..............................................................................................................................................32

Connecting the Ports ............................................................................................................................. 32

Establishing Communication Protocol ................................................................................................... 33

Switching between BACnet and Modbus Mode ..............................................................................................33

FIELD INSTALLATION .................................................................................................................. 36

Mounting a PowerScout Meter ............................................................................................................. 36

Wiring Connections on a PowerScout Meter ........................................................................................ 37

Completing the Field Installation ........................................................................................................... 37

Using the Pulse Output Port Function ................................................................................................... 38

Modbus Output Port Registers ........................................................................................................................39

BACnet Output Port Objects ............................................................................................................................39

Find Quality Products Online at: [e-mail]

www.GlobalTestSupply.com

iii

Wiring CTs .............................................................................................................................................. 40

Connecting Split-Core Style Millivolt CTs to a Load .........................................................................................41

Connecting RōCoil CTs to a Load ......................................................................................................................42

CT Wire Lead Polarity .......................................................................................................................................44

Connecting Voltage ................................................................................................................................ 44

Powering the Meter .........................................................................................................................................45

PowerScout Single-Phase Connections ............................................................................................................45

PowerScout 24 Wiring Diagrams ........................................................................................................... 47

Three Wire Delta ..............................................................................................................................................47

Three Phase, Four Wire Delta (Wild Leg) .........................................................................................................48

Single Phase, Two Wire ....................................................................................................................................49

Single Phase, Three Wire ..................................................................................................................................50

Four Wire Wye .................................................................................................................................................51

Verifying Installation with PhaseChek™ ................................................................................................ 52

Verifying the PowerScout Meter Setup Using the LEDs ...................................................................................52

PhaseChek Error Table .....................................................................................................................................53

Verifying Installation with the ViewPoint Software .............................................................................. 54

Real-Time Values ..............................................................................................................................................54

Read/Write Registers—Read/Set Objects ........................................................................................................55

Firmware ..........................................................................................................................................................57

ALL THINGS MODBUS ................................................................................................................ 58

Device Registers ...............................................................................................................................................58

Configuration Registers ....................................................................................................................................58

Pulse Output/Input Registers ...........................................................................................................................60

Absolute Measurement Registers ....................................................................................................................61

Positive Power/Energy Measurement Registers ..............................................................................................65

Negative Power/Energy Measurement Registers ............................................................................................69

Protocol Commands .........................................................................................................................................74

ALL THINGS BACNET ................................................................................................................ 78

Device Objects ..................................................................................................................................................78

Configuration Objects ......................................................................................................................................78

Pulse Output/Input Objects .............................................................................................................................80

Absolute/Net Value Measurement Objects .....................................................................................................81

Positive Power/Energy Measurement Objects ................................................................................................84

Negative Power/Energy Measurement Objects ...............................................................................................85

iv

Find Quality Products Online at: [e-mail]

www.GlobalTestSupply.com

v

APPENDICES ............................................................................................................................ 86

Appendix A—Connecting Multiple PowerScouts to an RS-485 Network .............................................. 86

Communication Protocol .................................................................................................................................86

Daisy Chain Layout for RS-485 Network ...........................................................................................................86

Networking Using the BACnet MS/TP/Modbus RTU Protocol .........................................................................86

Appendix B—Firmware Updates ........................................................................................................... 87

Installing Firmware Updates for the PowerScout ............................................................................................87

Downloading and Installing Firmware .............................................................................................................87

Appendix C—VERIS H8035/H8036 Emulation ....................................................................................... 88

VERIS Modbus Integer Registers ......................................................................................................................89

VERIS Multipliers ..............................................................................................................................................90

VERIS Modbus Floating Point Registers ...........................................................................................................92

Appendix D—Conversion Table ............................................................................................................. 95

Decimal to Hexadecimal Conversion Table ......................................................................................................95

Appendix E—Troubleshooting ............................................................................................................... 97

Troubleshooting Communication Issues ..........................................................................................................97

FREQUENTLY ASKED QUESTIONS .................................................................................................. 99

GLOSSARY ............................................................................................................................ 101

Find Quality Products Online at: [e-mail]

www.GlobalTestSupply.com

6

INTRODUCTION

PowerScout meters monitor the voltage, current, power, energy, and many other electrical parameters
on single- and three-phase electrical systems. A PowerScout meter uses direct connections to each
phase of the voltage, and uses current transformers to monitor each phase of the current. Information
on energy use, demand, power factor, line frequency, and more are derived from the voltage and
current inputs.

The communications interface to the meters is an RS-485 serial or Ethernet connection that uses the
BACnet Master Slave Token Passing (MS/TP) protocol or Modbus RTU protocol for sending commands
and retrieving data. A separate remote terminal unit (RTU), Data Logger, or Building Management and
Control System is usually connected to the PowerScout to provide data recording and trend logging plus
a human interface or display.

PowerScout 24 Serial/PowerScout 24 Ethernet

The PowerScout 24 is capable of reading eight 3-phase or 24- single-phase
services at a time and is mounted near the breakers. It is typically used for
long-term monitoring of electrical systems.

Up to 127 PowerScout 24 meters may be connected to a single BACnet client
for monitoring and recording power usage at multiple locations within a single
site. Up to 30 meters may be connected to Modbus.

There are eight configurable digital pulse output ports that can be used to
output kWh, kVARh, or kVAh pulses to external devices, or to toggle on and
off to control a remote device or relay. There are also two digital pulse input
ports. Pulse input is used to count, accumulate and scale pulses received from
non-DENT external pulse-initiating meters such as gas, water, or other
electrical meters.

The PowerScout 24 can be purchased either in an enclosure (PS24-D) that is
UL-listed or as a standalone PC board (PS24-N) that is UL recognized and must be installed in a user­supplied enclosure.

Unpacking the Unit

Your PowerScout meter comes with documents such as the Certificate of Calibration (COC) that has
information about the meter and is valuable for tech support. Be sure to set these documents aside in a
safe place when not in use.

If a Comm package was purchased as well, look for the ViewPoint software and the USB adapter. Verify
that all connectors are included (CT, voltage, comm, pulse).

Find Quality Products Online at: [e-mail]

www.GlobalTestSupply.com

7

Example of a COC for a PowerScout 24

Find Quality Products Online at: [e-mail]

www.GlobalTestSupply.com

8

Meter Anatomy

Find Quality Products Online at: [e-mail]

www.GlobalTestSupply.com

9

PowerScout Meter Safety Summary and Specifications

PS24-N-S/PS24-N-E

comply with NEC and local electrical codes.

These items conform to the following:

This general safety information is to be
used by both the Logger operator and
servicing personnel. DENT Instruments,
Inc. assumes no liability for user’s failure
to comply with these safety guidelines.

The PS24-N-S/PS24-N-E devices need to be installed in a user-supplied UL Listed/Recognized enclosure in order to

The PowerScout is an Over-Voltage Category III device. Use approved rubber gloves with mechanical protection and
goggles when operating the device.

CAUTION: THIS METER MAY CONTAIN LIFE THREATENING VOLTAGES. QUALIFIED PERSONNEL MUST DISCONNECT

ALL HIGH VOLTAGE WIRING BEFORE USING OR SERVICING THE METER.

PS24-D-S/PS24-D-E

PS24 Series (except PS24Es):

Conforms to UL Std 61010-1, 2
Edition

Certified to CSA Std C22.2 No. 61010-

nd

1, 2

nd

Edition

WARNING

Use of this device in a manner for which it is not intended may impair its means of protection.

Symbols on Equipment

Denotes caution. See manual for a description of the meanings.

When connecting the PowerScout to an AC load, follow these steps in sequence to prevent a shock hazard.

1. De-energize the circuit to be monitored.

2. Connect the CTs to the phases being monitored.

3. Connect the voltage leads to the different phases. Use proper safety equipment (gloves

and protective clothing) as required for the voltages monitored.

DENOTES HIGH VOLTAGE. RISK OF ELECTRICAL SHOCK. LIFE THREATENING VOLTAGES MAY BE PRESENT.
QUALIFIED PERSONNEL ONLY.

DO NOT EXCEED 600V. This meter is equipped to monitor loads up to 600V. Exceeding this voltage will cause

damage to the meter and danger to the user. Always use a Potential Transformer (PT) for loads in excess of
600V. The PowerScout is a 600 Volt Over Voltage Category III device.

Find Quality Products Online at: [e-mail]

www.GlobalTestSupply.com

10

undesired operation.

FCC COMPLIANCE

SENSOR LIMITATIONS

USE ONLY SHUNTED CURRENT TRANSFORMERS (CTs).
Do not use other CTs. Only use shunted CTs with a 333mV maximum output only. Serious shock hazard and

logger damage can occur if unshunted CTs are used. The UL listing covers the use of the following DENT
Instruments CTs that are UL Recognized and have been evaluated to IEC 61010-1:

CT-HSC-020-X (20A Mini), CT-HSC-050-X (50A Mini), CT-HMC-0100-X (100A Midi), CT-HMC-0200-X (200A Midi),
CT-Rxx-1310-U (RōCoil), and the CTRxx-A4-U (RōCoil).

PS24-D-S/PS24-N-S

This device has been tested and found to comply with the limits for a Class A digital device, pursuant to
part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful
interference when the equipment is operated in a commercial environment. This equipment generates,
uses, and can radiate radio frequency energy and, if not installed and used in accordance with the
instruction manual, may cause harmful interference to radio communications. Operation of this
equipment in a residential area is likely to cause harmful interference in which case the user will be
required to correct the interference at user’s own expense.

Operation is subject to the following two conditions: (1) This device may not cause harmful interference,
and (2) this device must accept any interference received, including interference that may cause

Equipment protected throughout by double insulation (IEC 536 Class II).

MAINTENANCE

There is no required maintenance with the PowerScout. Abide by the following items:
Cleaning: No cleaning agents, including water, shall be used on the PowerScout.
Battery Life: (If equipped) The lithium battery is only used to maintain the date and clock settings during power

failure and has a life expectancy of greater than 10 years. Contact DENT Instruments for service.
No accessories are approved for use with the PowerScout meter other than those specified in the DENT

Instruments product literature and price sheets.
If the meter appears damaged or defective, first disconnect all power to the meter. Then call or email technical

support for assistance.

DENT Instruments
Bend, Oregon USA
Phone: [phone]
DENTinstruments.com
Email: [e-mail]

Find Quality Products Online at: [e-mail]

www.GlobalTestSupply.com

11

PowerScout Résumé de Sécurité et Spécifications

Tous les articles sont conformes à ce
qui suit:

Cette information de sécurité est destinée
à être utilisée à la fois par l'opérateur de
l'enregistreur et le personnel de service.
DENT Instruments, Inc n'assume aucune
responsabilité pour l'utilisateur qui ne
respecte pas les directives en matière de
sécurité.

Le PowerScout est un appareil de surtension de catégorie III. Utiliser des gants en caoutchouc approuvé avec protection
mécanique et des lunettes lors de l'utilisation de l'appareil.

ATTENTION: CE METER PEUT CONTENIR DE HAUTES TENSIONS QUI PEUVENT ÊTRE DANGEREUSES. UN PERSONNEL

QUALIFIÉ DOIT DÉBRANCHER TOUS LES CÂBLES À HAUTE TENSION AVANT D’UTILISER OU DE RÉPARER
DU METER.

PS24-D-S/PS24-D-E

PS24-N-S/PS24-N-E

PS24 Série (Sauf PS24Es):

Conforme à UL Std 61010-1, 2nd
Edition

Certifié CSA Std C22.2 No. 61010-1,

nd

2

Edition

ATTENTION

L'utilisation de cet appareil d'une manière pour laquelle il n'est pas destiné peut annuler ses moyens de
protection.

Symboles des Equipements

Signifie prudence. Voir le manuel pour une description de la signification.

En faisant la connexion du PowerScout à une prise de courant alternatif, suivez ces étapes en ordre pour
empêcher un risque de choc.

1. Décharger le circuit à contrôler.

2. Connectez le TC aux phases à surveiller.

3. Connectez les fils de tension à des phases différentes. Utiliser des équipements de sécurité (gants et des
vêtements de protection) qui sont nécessaires pour les tensions surveillées.

INDIQUE HAUTE TENSION. RISQUE DE CHOC ÉLECTRIQUE. HAUTES TENSIONS PEUVENT ÊTRE PRÉSENTES
QUI METTENT LA VIE EN DANGER. PERSONNEL QUALIFIÉ UNIQUEMENT.

Find Quality Products Online at: [e-mail]

www.GlobalTestSupply.com

12

NE PAS DEPASSER 600V. Ce compteur peut contrôler les charges jusqu'à 600V. Le dépassement de cette
tension peut causer des dommages à l'appareil et du danger pour l'utilisateur. Utiliser toujours le potentiel
transformateur (PT) pour des charges de plus de 600V. Le PowerScout est un appareil à 600 V de surtension
de catégorie III.

LIMITATIONS DE DÉTECTEUR

UTILISEZ SEULEMENT TRANSFORMATEURS DE COURANT (TC) SHUNTÉE.
N’utilisez pas d'autres TC. Utilisez seulement des TC shuntée avec une puissance maximale 333mV. Un sérieux

risque de décharge électrique et des dommages à l'enregistreur peut se produire si des TC pas shuntée sont
utilisés. Utiliser seulement les CTs des DENT Instruments suivants qui sont énumérés jusqu'au 600V/CATIII.

CT-HSC-020-X (20A Mini), CT-HSC-050-X (50A Mini), CT-HMC-0100-X (100A Midi), CT-HMC-0200-X (200A Midi),
CT-Rxx-1310-U (RōCoil), and the CTRxx-A4-U (RōCoil).

L'équipement protégé en double isolation (IEC 536 Classe II)

Entretien

Il n'y a aucun entretien requis avec le PowerScout. Respectez les points suivants:
Nettoyage: Aucun agents de nettoyage, y compris l'eau, doit être utilisé sur le PowerScout.
Espérance de Vie de la Batterie: La pile au lithium est utilisée uniquement pour maintenir les paramètres de date

et d'heure en cas de coupure de le courant et a une espérance de vie de plus de 10 ans. Contactez DENT
Instruments pour le service.

Pas d'accessoires approuvés pour une utilisation avec le PowerScout sauf ceux spécifiés par DENT Instruments
dans ses documentations sur les produits et également sur les prix.

Si le compteur semble endommagé ou défectueux, tout d'abord déconnecter le pouvoir de l'appareil. Alors s'il
vous plaît appelez 541.388.4774 ou contacter par courriel l'assistance technique pour obtenir de l'aide.

DENT Instruments
Bend, Oregon USA
Phone: [phone]
DENTinstruments.com
Email: [e-mail]

Find Quality Products Online at: [e-mail]

www.GlobalTestSupply.com

13

PowerScout 24 Technical Specifications

Specification Description

Service Types Single Phase, Three Phase-Four Wire (WYE), Three Phase-Three Wire (Delta)

3 Voltage Channels 80-346 Volts AC Line-to-Neutral, 600V Line-to-Line, CAT III

Current Channels

Maximum Current Input

Measurement Type True RMS using high-speed digital signal processing (DSP)

Line Frequency 50/60Hz

Power

Power Out Unregulated 5VDC output, 500 mA Max

Waveform Sampling 12 kHz

Parameter Update Rate 1 second

Measurements

Accuracy 1% (<0.5% typical) for V, A, kW, kVAR, kVA, PF

Resolution

Indicators

Pulse Output Open Collector, 75mA max current, 40V max open voltage

24 channels 0-5,000+ Amps depending on current transducer

200% of current transducer rating (mV CTs). Measure up to 5000 Amps with RōCoil
CTs using 333mVAC output at full current rating.

From L1 Phase to L2 Phase. 80-600VAC CAT III 50/60Hz, 200mA Max. Non-user
replaceable .5 Amp internal fuse protection

Volts, Amps, kW, kWh, kVAR, kVARh, kVA, kVAh, Apparent Power Factor (aPF),
Displacement Power Factor (dPF). All parameters for each phase and for system total.

0.01 Amp, 0.1 Volt, 0.01 watt, 0.01 VAR, 0.01 VA, 0.01 Power Factor depending on
scalar setting

Bi-color LEDs (red and green): 1 LED to indicate communication, 3 LEDs for correct
phasing (PhaseChek™: Green when voltage and current on the same phase; Red when
incorrectly wired). Pulse input LED, Power On LED.

Direct

Max Communication
Length

RS-485 Loading 1/8 unit

Communication Rate
(baud)

Data Bits 8

Serial Meters

Parity None, Even, Odd

Stop Bit 2, 1

Data Formats

Communication

User Selectable Modbus RTU or BACnet Master Slave Token Passing protocol (MS/TP)
RS-485 or Ethernet, and USB for meter setup.

1200 meters with Data Range of 100K bits/second or less

Modbus: 9600 (Default), 19200, 38400, 57600, 76800, 115200
BACnet: 9600 (Default), 19200, 38400, 76800

Modbus Protocol

-or-
BACnet Master Slave / Token Passing (MS/TP) protocol

Find Quality Products Online at: [e-mail]

www.GlobalTestSupply.com

14

Mechanical

Operating Temperature -7 to + 60⁰ C (-20 to 140⁰ F)

Humidity 5% to 95% non-condensing

Enclosure (Optional): 27.94 x 19.05 x 12.954 cm (11” x 7.5” x 5.1”) PC UL 94 5V

Weight 369 g (13 ounces), exclusive of CTs; with enclosure 609.51 g (21.5 ounces)

Dimensions 25.5 x 16.5 x 3.2 cm (10.9” x 7.4” x 5.1”)

Ingress Protection (IP) Rating 20

ViewPoint™ Minimum System Requirements

Operating System Windows® 7 (32 or 64 bit), Windows® 8 Pro, Vista (32 or 64 bit), XP

Communications Port One USB port or serial port

Hard Drive 50 MB minimum available

Processor Pentium Class 1 GHz or more recommended

Safety

The following are UL listed:

PS24-D-S/PS24D-E

The following are UL Recognized:

PS24-N-S/ PS24-N-E

Serial/Ethernet Meters

The PS24 Series:

Conforms to UL Std 61010-1, 2nd Edition
Certified to CSA Std C22.2 No. 61010-1, 2nd Edition

(CE does not apply to PS24 Ethernet)

Table I-1: Technical Specifications

Find Quality Products Online at: [e-mail]

www.GlobalTestSupply.com

PREPPING FOR FIELD INSTALLATION

There are multiple tasks that are typically completed before heading to the field, usually by your
technical support personnel. These include determining how to communicate with the meter, setting
address switches, installing ViewPoint, etc. Communication configuration must be set up in the
ViewPoint software even if you use a separate logger to record data. The more tasks completed before
installation means less time in the field.

These determinations figure into how you set up the PowerScout meter for operation:

 BACnet vs. Modbus

Set the network address switches on the meter to either Modbus or BACnet

 RS-485 vs. Ethernet

The type of connection is part of the configuration set up in the ViewPoint software

 Laptop/PC for setup verification via USB

A convenient method for setup before going in the field, and once in the field, to easily read
real-time values

NOTE: Installation of the ViewPoint
tested with a meter prior to the field installation. A USB cable can be used when configuring the meter
in this manner.

software and a communication cable should be completed and

Installing the ViewPoint Software

The ViewPoint software is designed to let you easily configure
the PowerScout for different current transformers, check
readings, and verify correct setup. All of DENT Instruments PowerScout meters use ViewPoint software
to communicate with the meter. It needs to be installed on any computer talking to the PowerScout 24.
ViewPoint is compatible with Windows® 7 (32 or 64 bit), Windows® 8 Pro, Vista (32 or 64 bit), or XP.

 Insert the ViewPoint CD into the CD-ROM drive.

The installer starts automatically. If it does not, browse to the CD and locate the ViewPointInstaller.exe
program. Start the installer by double-clicking ViewPointInstaller.exe.

The Communication screen is displayed when ViewPoint is first started. This is where the software
networking parameters are entered to match the PowerScout networking configuration (meter type,
COM port, baud rate, base address, etc.). ViewPoint remembers your last connection and displays those
previous selections when opening the software once again.

NOTE: ViewPoint software serves several functions, such as setting up a meter, getting real-time values,
and read/write registers and objects, but for the purpose of prepping for field installation only three are
important to the process: Communications, Meter Setup, and Comms Setup. The other functions are
described later in this document.

DID YOU KNOW? ViewPoint may be
installed on multiple computers.

Find Quality Products Online at: [e-mail]

www.GlobalTestSupply.com

15

Connecting a Communication Cable

There are various ways to communicate with a PowerScout meter and how you do so will determine
what type of cabling system you will use. To set up the meter, communication can be established with a
USB cable, an RS-485 adapter, or an Ethernet cable. Once in the field, communication between a
PowerScout meter and a logger is established with a RS-485 or an Ethernet connection. A RS-485
connection is limited in speed while an Ethernet connection is much faster.

NOTE: PowerScout meters are ordered from DENT Instruments based on the type of desired connection.

CONNECTING AND COMMUNICATING VIA A USB OR RS-485 ADAPTER

A type AB USB cable may be used between a PC and a PS24 meter and is the preferred method for
setting up a PowerScout. The USB cable will also power the meter when connected to a PC. When using
a USB cable with a PC, each USB port on the PC generates a unique comm port in the ViewPoint
software, such as Com3 or Com4.

NOTE: A USB driver is installed when you install the ViewPoint software.

ViewPoint can read information through a USB, an RS-485 isolated COM port, or an Ethernet
connection. When the RS-485 connection is selected a base address is required (the base address is the
rotary switch settings). Address switches are ignored by both USB and Ethernet. When the Ethernet
connection is selected an IP address is required. The screen display changes based on your connection
selection.

The USB connector on the PowerScout can be used to power the unit when configuring it using

ViewPoint and Modbus protocols.

If connecting with a USB cable is not practical, the use of an RS-485 to USB adapter connected to your
PC may be used for communicating with your PowerScout. First, install the adapter driver on the
computer and then complete the connection between the meter and the computer by plugging the
RS-485 connector into the meter.

Find Quality Products Online at: [e-mail]

www.GlobalTestSupply.com

16

DID YOU KNOW? If an RS-485 adapter is used instead of a USB, an RS-485 driver must be installed

properly.

on your computer and power applied to the PowerScout meter before the software will function

Installing the RS-485 Adapter on a Computer

1) Insert the CD that came with the RS-485 adapter into your computer.

2) Insert one end of a USB cable into the RS-485 adapter and the other end into a USB port on the

computer.

3) The Found New Hardware Wizard window appears.

The window states “This wizard helps you install software for: Model USOPTL4,” and asks “What do
you want the wizard to do?”

4) Select Install the software automatically and click Next.

5) Click Finish when the installation is complete.

6) Remove the CD from your computer.

Find Quality Products Online at: [e-mail]

www.GlobalTestSupply.com

17

Connecting the Adapter to the Meter

The three wires coming from the RS-485 adapter are plugged into the COM connector. Insert each white
ferrule into the appropriate slots on the connector. The red wire inserts in the left slot (+), the black wire
in the middle slot (-), and the green wire in the right slot (Shield), Figure II-1 and Figure II-3. Verify that
the dip switches on the back of the RS-485 adapter are set to RS-485, Echo Off, 2 Wire, 2 Wire as shown
in Figure II-2 before plugging the adapter into the PowerScout.

Figure II-2: Dip switches on back of RS-485

Adapter

Figure II-1: RS-485 Adapter

Figure II-3: RS-485 Connector on PS24

Find Quality Products Online at: [e-mail]

www.GlobalTestSupply.com

18

NOTE: USB is always active on the PowerScout (and the protocol is Modbus over the USB virtual

communications port).

NOTE: If ViewPoint was installed first, it needs to be restarted following a RS-485 driver installation. If a
RS-485 port does not appear in the drop-down list, the RS-485 was not installed correctly.

1) Select USB/RS-485 (MSTP) as your communication type.

2) Select PS24.

3) When connecting with an RS-485, enter a base address that matches the switches on the

PowerScout. A USB connection ignores address switches. See Setting the Network Address Switches
below.

4) When connecting with an RS-485, select Modbus or BACnet as your communication protocol. When

communicating over USB, whether the PS24 is configured for Modbus or BACnet mode, the PS24
will communicate over the Modbus protocol.

5) Select the PC COM Port from the drop-down list. For a USB connection, select “COMxx DENT USB”

in the field, where “xx” is the port number. For an RS-485 connection using an RS-485 adapter,
select COMxx RS-485 Isolated Port (COMxx) where "xx' is the COM port number.

Default settings are used for the two remaining fields: Data Bits is 8N1 and the Baud Rate is 9600. When
BACnet is selected as your protocol an additional read-only field appears displaying the BACnet Device ID
and the default baud rate is 76800.

Find Quality Products Online at: [e-mail]

www.GlobalTestSupply.com

19

Setting the Network Address Switches

There are three rotary decimal network address switches on the PowerScout 24 used to select the
BACnet/Modbus address the client uses to communicate with the PowerScout.

The BACnet MS/TP MAC and Modbus address is a decimal value, represented by three digits: 000
through 009, 010-090, and 100-999.

Note: BACnet MS/TP masters only support addresses 001–127.

Decimal Address BACnet Address Availability

000

001-127 Available (01/001 is the factory default setting).

128-254 Reserved for BACnet slave devices.

255 Reserved for network broadcast.

999

Reserved for resetting the PowerScout to Modbus mode with 9600 baud,
8 bit, 1 stop bit and no parity.

Used to configure PS24 for Modbus/BACnet

Table III-1: BACnet Hexadecimal/Decimal Address Availability

Find Quality Products Online at: [e-mail]

www.GlobalTestSupply.com

20

Reserved for resetting the PowerScout to Modbus mode with 9600 baud,

001-239

Available for Modbus slave devices.

255

Reserved for network wide broadcast.

Reserved for communication protocol settings. The rotary switches can

A

0 (Base Object)

E

Base Object + 80000

B

Base Object + 20000

F

Base Object + 100000

C

Base Object + 40000

G

Base Object + 120000

D

Base Object + 60000

H

Base Object + 140000

Decimal Address Modbus Address Availability

000

999

8 bit, 1 stop bit and no parity.

be used to configure the communication protocol to BACnet or Modbus
as well as changing the baud rate if unsure of the current settings.

Table III-2: Modbus Hexadecimal/Decimal Address Availability

ADDRESSING AN ELEMENT

The PowerScout 24 has eight elements. Modbus and BACnet each use different ways to designate an
element on the PS24.

In Modbus mode, the decimal network switches set the base address for metering element “A.”
Metering elements “B” through “H” will always have a Modbus address that is one higher than the
element before. For example, if the rotary address switches are set to 001 then metering element “A”
register values will be accessed at Modbus address 001, element “B” registers will be accessed at
Modbus address 002, element “C” at address 003, and so on.

In BACnet mode, elements are incrementally (in alphabetic order) designated by adding 20000 to an
object value. So, Element A = Base object number zero, Element B = Base object number zero + 20000,
Element C = Base object number zero + 40000, and so forth. Thus, to reference object 15010 to
Element E, write 95010 (15010 + 80000).

PS24 Element BACnet Designation PS24 Element BACnet Designation

Find Quality Products Online at: [e-mail]

21

www.GlobalTestSupply.com

Communication Error

If ViewPoint is unable to communicate with the PowerScout, the Status window displays the following
message in the Status field:

“Unable to establish connection with meter, please check settings and try again.”

Try the following to resolve the communication error on a serial PowerScout:

 No RS-485 option available in the PC COM Port drop-down list—indicates the required software

driver is not installed.

 Modbus Base Address Switch does not match the selected hex switch settings on the

PowerScout—change the switch settings.

 The selected Baud Rate does not match the PowerScout baud rate—change the baud rate.

For more information, refer to the Appendix, Troubleshooting Communication Issues.

CONNECTING AND COMMUNICATING VIA AN ETHERNET (TCP/IP) CONNECTION

Connect one end of the Ethernet cable into the PowerScout and the other end into your computer or
network. To begin communicating via an Ethernet cable you must first set it up within the ViewPoint
software that came with the meter. See Ethernet (TCP/IP) Connection in the Communicating with a
PowerScout Meter section.

The meter will require power to communicate over Ethernet. Power can be supplied by connecting the
USB or voltage lines 1 and 2.

PowerScout 24 Ethernet Module

Keep in mind that the Ethernet connection must have an IP Address in the ViewPoint software that can
either be set manually within the software with the Use Static IP address option (for a fixed address) or
obtained automatically from the router connected to the logger using the Use DHCP option (dynamic
address). Both options have advantages. See About IP Addresses further in this document.

NOTE: When the Ethernet Module is installed the RS-485 port is disabled.

Find Quality Products Online at: [e-mail]

www.GlobalTestSupply.com

22

1) Select Ethernet (TCP/IP) to gather information via a network connection. When selected, the

Communications Setup screen changes and an IP Address is required as address switches are
ignored.

2) Select your mode of communication.

3) Enter the IP Address for the Ethernet connection of the meter or select one of the previously used

addresses from the drop-down list. See About IP Addresses below.

-or­Use the Scan Network to search on the network for the PowerScout.

-or­Use the Setup button to acquire a new IP Address. See About IP Addresses below.

4) Enter the Port connected to the PowerScout. A checkbox is available to make the port the default.

Different networks may require different ports. See your network administrator.

About IP Addresses

The Ethernet connection must have an IP Address that is set manually in the IP Address: field or
obtained automatically from the router connected to the meter using the Use DHCP option (dynamic
address) found in the Logger Network Setup dialog box accessed via the Setup button. Both options
have advantages.

NOTE: A Static IP address of 192.168.1.10 is assigned in the factory to all Ethernet PowerScouts.

 Static Connection: If you know an IP address that is not being used by another device on the

network, enter that address into the IP Address: field. This may require permission from a
network administrator. With a static IP address it is easy to connect to the meter as there is no
doubt about what IP address to use.

 Dynamic Connection: If you want the router to assign an IP address to the meter automatically,

select Use DHCP. This may avoid the need of a network administrator as the router will assign an
IP address that does not conflict with any other devices on the network. A disadvantage of the
DHCP option is that the “lease” of the IP address may expire after a period of time and the
router could assign a different IP address. A new IP address means that ViewPoint cannot
connect to the meter until the new IP address has been entered. (See below.)

Find Quality Products Online at: [e-mail]

www.GlobalTestSupply.com

23

An additional option is to set the meter to DHCP and go to the router and assign a specific IP address to
the MAC address that corresponds to the meter. In this way, if the lease does expire, the router will
always assign the same IP number back to the meter. This option may also require a network
administrator.
The Scan Network button scans the network for possible meters and displays them in the Logger

Selection dialog box. Look for the serial number on the meter (found on the back of the meter) to
determine which connection point is yours.

 Select the correct device from the list of IP Addresses and click OK.

The Setup button displays the Logger Network Setup dialog box where network address information is
entered. See your network administrator before making changes.

When you select the Use DHCP checkbox the Dynamic Host Configuration Protocol is used to populate
the IP Address, Subnet Mask, and Gateway Address fields automatically.

NOTE: Each meter connected to the network requires its own unique network IP address. An address is
provided automatically if the network allows DHCP (Dynamic Host Configuration Protocol) and the
meter is configured to request an address.

 Click Update Logger after making your selections.

ViewPoint displays the following message when the connection is successful:

Find Quality Products Online at: [e-mail]

www.GlobalTestSupply.com

24

Communications LEDs

Steady Green

The PowerScout COM LEDs signal the following communication information.

PS24 SERIAL/ETHERNET

BACnet Modbus Description

Steady Green Power is applied to the meter.

Flashing Green

Steady Red Communications failure, or talking with BACnet while PS24 is in

Flashing Red The meter is receiving communication on the bus for a meter at

Table II-3: PS24 Serial/Ethernet COM LED Signals

The meter is communicating.

Modbus mode.

another address.

Meter Setup

Once communications is established between the PC and the PowerScout, you are now ready to
configure the meter for the field. This is accomplished in the Meter Setup tab of ViewPoint.

The Meter Setup screen allows unique changes to each element on the PS24. Within each element, CT
Phase, Type, Amps, and Phase Shift are entered, based on wiring connection, for CT1, CT2, and CT3. The
type of wiring connection and the Digital Output are also entered for the element. Overall, a Demand
Window of 1–60 minutes is available for the recording of demand and a Line Frequency of 50 Hz or 60 Hz
is selectable.

NOTE: In PowerScout meters, Peak Demand is calculated using a moving window and is averaged across
the selected demand window size. Each minute the total consumption is recalculated and compared to

Find Quality Products Online at: [e-mail]

www.GlobalTestSupply.com

25

the last demand window. If the new window is larger than the last recorded value, it is recorded. This
value is calculated during the sampling of the waveform.

The Meter Setup screen is blank when first accessed. Click Retrieve Meter Setup to view the current
status of the elements. The Element Status dialog box displays while each element is read.

Find Quality Products Online at: [e-mail]

www.GlobalTestSupply.com

26

ENTERING WIRING INFORMATION FOR AN ELEMENT

Begin setup by entering an amount of time (1-60 minutes) into the Demand Window and selecting a
Line Frequency from the drop-down list.

Use the following steps within an element:

1) Select WYE, DELTA, or Single Phase as the wiring connection.

NOTE: DENT Instruments recommends using 3 CTs in a WYE connection for Delta loads.

 A WYE connection automatically displays all three CTs. Any changes made to CT1 also apply to

CT2 and CT3.

Wye Wiring Connection

 A DELTA connection displays only the two available CTs. Any changes made to CT1 also apply to

CT3.

Delta Wiring Connection

2) Depending on the wiring connection, make changes to CT1, CT2, and/or CT3.

 CT Phase—Shows the voltage of the referenced CT.
 CT Type—Use the drop-down list to select the type of CT attached to the PowerScout.
 CT Amps—Enter the amperage rating.
 CT Phase Shift—Enter in degrees the phase shift of the CT. The default is 1.1.

Find Quality Products Online at: [e-mail]

www.GlobalTestSupply.com

27

The following table shows the recommended CT Phase Shift for various DENT Instruments CTs:

Current Transformers Recommended CT Phase Shift Values

Split Core Small CT-SCS-0050

CT-SCS-0100

Split Core
Medium

Split Core Large CT-SCL-0600

Split Core High
Accuracy

Hinge Mini 20A

CT-SCM-0100
CT-SCM-0200
CT-SCM-0400
CT-SCM-0600

CT-SCL-1000

CT‐SHS‐0005
CT-SHS-0015

Mini 50A
MIDI 100A
MIDI 200A

Table II-8: Recommended CT Phase Shift Value

2.20°

2.20°

1.75°

1.50°

1.30°

1.30°

0.00°

0.00°

0.50°

0.50°

0.75°

0.75°

0.12°

0.30°

3) Select a Digital Output from the drop-down list if being used.

4) Select a Data/Digital Scalar from the drop-down list.

Find Quality Products Online at: [e-mail]

www.GlobalTestSupply.com

28

SELECTING A SCALAR

0

.00001

.00001

.00001

.01

.01

.1 1 .001

.001

.001

.01

.1

.1

2

.01

.01

.01

.01

.1

.1

3

.1

.1

.1

.01

.1

.1 4 1 1 1

.01 1 1 5 10

10

10

.01 1 1

≥6

100

100

100

.01 1 1

DID YOU KNOW: The

The use of Modbus protocols limits the data registers to a maximum of two
bytes (16 bits) or a maximum decimal value of 65535. Modbus requires that
the data be unsigned (positive) integer values. To overcome these
limitations some measured (and stored) values must be scaled to fit into the Modbus registers. The raw
value read from the Modbus registers is multiplied by a scalar to convert the raw data. The following
table lists the data scalars and the respective values for the PowerScout.

Scalar Value

Data Scalar

kW/kWh

Demand

kVAR/kVARh kVA/kVAh

Power
Factor

register value must
be less than 65,535.

Amps Volts

Table II-9: Data Scalars and Values for Registers 44001 thru 44061

The data scalar is stored in register 44602.
When selecting a data scalar, the following guidelines need to be considered:

 If the data scalar selected is too low, an incorrect data result is returned from the register.
 If the data scalar selected is too high, the significant digits following the decimal point are

removed.

After selecting a data scalar, the formula for calculating the actual value is:

register value X scalar value = actual value

Or, another way to state this formula is:

actual value/scalar value = register value

Find Quality Products Online at: [e-mail]

www.GlobalTestSupply.com

29

The following table is an example when selecting a data scalar for 3-phase loads based on the CT size or
maximum current. These are the minimum recommended scalar settings.

CT Size or

Max. Current

50 Scalar 1 Scalar 2

100 Scalar 2 Scalar 2

200 Scalar 2 Scalar 2

400 Scalar 2 Scalar 2

600 Scalar 2 Scalar 3

1000 Scalar 3 Scalar 3

3000 Scalar 3 Scalar 3

3-phase Loads

230 volts 460 volts

Table II-10: Data Scalar Selection

Examples Using a Data Scalar

The following examples use kW throughout.

For example 1, the following data is used:

Volts x amps = watts 480 volts x 100 amps = 48,000 watts

Watts x 3 = system watts 48,000 watts x 3 = 144,000 watts (144kW)

Check the register’s value using the data scalar 2 value of .01:

System kW / scalar value = register value 144kW/.01 = 14,400

Since 14,400 is less than 65,535, using data scalar 2 is a good choice for this example.

For example 2, the following data is used:

480 volts x 1000 amps = 480,000 watts

480,000 watts x 3 = 1,440,000 watts (1,440kW)

Check the register’s value using the data scalar 1 value of .001:

1,440kW/.001 = 1,440,000

Since 1,440,000 is greater than 65,535, using data scalar 1 returns an incorrect result. Data scalar 1 is
not an appropriate choice.

Reviewing this example using the data scalar 3 value of .1 provides the following result:

1,440kW/.1 = 14,400

Since 14,400 is less than 65,535, using data scalar 3 is a good choice for this example.

Find Quality Products Online at: [e-mail]

30

www.GlobalTestSupply.com

Values Requiring Two Registers

Additionally, some values (e.g., kilowatt hours) may cover a dynamic range that is larger than 65535 and
require two Modbus registers. Any parameter in the Modbus Register Assignment tables that shows
two registers (identified by the terms MSW (Most Significant Word) and LSW (Least Significant Word))
are examples of this wide-ranging parameter.

To interpret the values contained in these registers, the steps are:

2) Multiply the MSW register by 65536.

3) Add the result to the value found in the corresponding LSW register.

4) Multiply the result by the appropriate scalar value from Table II-9.

For example, assume that System Total True Energy (kWh) is desired and the
value of 5013 is read from register 44001 (LSW) and 13 is read from register
44002 (MSW) and that the register 44602 data scalar is set to 3.

To calculate the total kWh recorded:

Multiply the MSW by 65536: 13 X 65536 = 851968
Add the LSW: 851968 + 5013 = 856981
Multiply by the scalar 3 value of 0.1: 856981 X 0.1 = 85698.1 kWh

Comms Setup

DID YOU KNOW?

When reading two
register values,
ViewPoint
automatically
calculates the total
value.

Use this tab to change communication parameters for the meter, such as communication protocols and
how those communications are transferred. This screen displays the fields pertinent to your power
connection and communication protocol, so if you are connected by RS-485 then only those fields are
shown. However, if you are connected with a USB cable all fields are displayed. Changes to these fields
override any settings on the Communications tab.

Find Quality Products Online at: [e-mail]

www.GlobalTestSupply.com

31

RS-485 SETTINGS

Change the Data Bits or Baud Rate on the meter by using these fields.
NOTE: You will see the above dialog when you are connected via USB on an Ethernet PowerScout or

when connected via an RS-485 unit.

BACNET DEVICE SETTINGS

Enter a new value into any field and click Send Setup to Meter to update the Device ID (meter
identification), Max Master (# of units on network), or Max Info Frames (# of packets sent via MS/TP).

ETHERNET SETTINGS

NOTE: You will see the above dialog when connected via an Ethernet PowerScout.

Connecting the Ports

Once your communication mode is selected, click Connect to establish a connection between the
computer and the PowerScout meter.

 When the PowerScout is in the process of connecting to the computer, the Communication

Status LED flashes briefly followed by a solid green.

 If the PowerScout cannot connect to the computer, the Communication Status LED flashes red

and returns to a solid green. Change the ViewPoint hardware settings and click Connect again.

ViewPoint fills the Device Info fields when the computer communicates with the PowerScout.
PowerScout meter installation can be verified using the ViewPoint software. Refer to Using ViewPoint

Software further in this document for more information.

32

Find Quality Products Online at: [e-mail]

www.GlobalTestSupply.com

Establishing Communication Protocol

The PowerScout communicates using the BACnet MS/TP or Modbus RTU protocols via the
RS-485/Ethernet interface. To establish communication with a RS-485, the settings must meet the
following requirements:

 The Modbus/BACnet address on the PowerScout and in the ViewPoint software must be set to

the same value.

 The PowerScout meter default serial parameters are:

Parameter

Defaults

Baud 9600 76800

Data bits 8 8

Parity None None

Stop Bit 1 1

Table II-11: Serial Communication Settings

The supported baud rates include 9600, 19200, 38400, 57600 (Modbus only), 76800, and 115200
(Modbus only).

NOTE: The baud rate on the user interface (ViewPoint) must match the PowerScout setting. If these
settings differ, the PowerScout cannot communicate. There are no baud rate settings when connected
via Ethernet.

Modbus
Settings

BACnet

Settings

SWITCHING BETWEEN BACNET AND MODBUS MODE

Changing Communication Mode Using ViewPoint

Using the Comms Setup tab in ViewPoint is the preferred way to change communications modes
between Modbus and BACnet.

Note: The baud rate and serial settings may need to change between Modbus and BACnet. Setting
address switches to “00” will set the unit in Modbus protocol, 9600 baud rate.

If communication fails, see the section Changing Baud Rate or Communication Mode using Address
Switches (between Modbus and BACnet) on the next page.

Find Quality Products Online at: [e-mail]

www.GlobalTestSupply.com

33

Changing the PowerScout from Modbus to BACnet mode:

1) Connect to the PowerScout using ViewPoint.

2) Go to the Read/Write Registers tab in ViewPoint.

3) Enter 44612 into the Register field or click List to select from the

Register Picker List.

4) In the Value field, enter 1833 to change to BACnet mode.

5) Click OK. The status should say “Writing Value…”

Return to the Communications tab and connect.

Changing the PowerScout from BACnet to Modbus mode:

1) Connect to the PowerScout using ViewPoint.

2) Go to the Read/Set Objects tab in ViewPoint.

3) Enter 10190 into the Object field or click List to select from the Object Picker List.

4) In the Value field, enter 375 to change to Modbus mode.

5) Click OK. The status should say “Writing Value…”

Return to the Communications tab and connect.

Find Quality Products Online at: [e-mail]

www.GlobalTestSupply.com

34

Changing Baud Rate or Communication Mode Using Address Switches (between Modbus and BACnet)

This procedure is only required if Changing Communication Mode using ViewPoint (between Modbus
and BACnet) fails and the PowerScout needs to be returned to a particular communications protocol and

baud rate.

1) Power down the PowerScout (disconnect all voltage leads or the USB cable).

2) Set the rotary Address switches to “999”.

3) Power up the PowerScout (connect the black & red voltage leads to power or connect the USB

cable).

4) Set LSB to one of the following communication modes:

LSB Address

Switch

1 Modbus* Red On Off

2 BACnet Red On Red On

*Factory Default

Communication Mode RS-485 LED COM LED

5) Next set MSB to one of the following baud rates:

MSB

Address

Baud Rate

Switch

1 9600* Off Off Green

2 19200 Off Green Off

3 38400 Off Green Green

4 57600 (Modbus only) Green Off Off

5 76800 Green Off Green

6 115200 (Modbus only) Green Green Off

PhaseChek

LED CT1

PhaseChek

LED CT2

PhaseChek

LED CT3

*Factory Default

You will have 10 seconds to make changes after powering up the PowerScout. However, every time a
rotary switch is changed, the 10 second timer resets. After 10 seconds of no switch action, the settings
take effect and the switches revert to the Modbus Address selector if in Modbus mode or MAC address
if in BACnet mode.

FAILSAFE: If all address switches are “0,” the meter is placed in Modbus mode at 9600 baud rate.
Communication registers can be modified for baud rate and for mode.

Find Quality Products Online at: [e-mail]

www.GlobalTestSupply.com

35

FIELD INSTALLATION

three shown)

Mounting a PowerScout Meter

Once your PowerScout meter is set up for the desired communication method and protocol, it’s ready to
install out in the field.

WARNING! Remove the meter from all sources of voltage before mounting.

PowerScout
installation practices according to the local electrical codes.

 The raw board of the PowerScout 24 meter can be mounted to customer-provided standoffs or

PowerScout 24 mounted in a NEMA-rated box

meters must be installed in an approved electrical panel or enclosure using proper

placed into a NEMA (National Electrical Manufacturers Association) box. A NEMA-rated box is
available through DENT Instruments. Securely mount the PowerScout meter near a dedicated
circuit disconnect breaker.

Standoff mounts (four on bare board,

near electrical panel

Find Quality Products Online at: [e-mail]

www.GlobalTestSupply.com

36

Wiring Connections on a PowerScout Meter

High voltage MAY BE PRESENT. Risk of electric shock. Life threatening voltages may be present.
Qualified personnel only.

Haute tension peut être présente. Risque de choc électrique. Tensions dangereuses peuvent
être présentes. Personnel qualifié uniquement.

PowerScout 24 meters have the following connections:

 Either a three-wire connector for the RS-485 BACnet/Modbus link or an Ethernet connector.
 Four voltage connections, but the leads are customer supplied.

PowerScout meters are self-powered from L1 and L2.

 Up to twenty-four current transformers (CTs).
 Digital output ports. The ports can be used to output kWh, kVARh, or kVAh pulses to external

devices, or to toggle on and off to control a remote device or relay.

Completing the Field Installation

Follow these steps to complete the field installation of your PowerScout meter:

 Connect whatever communications cable you are using to the building network.
 Connect your pulse output, if used. The port can be used to output kWh, kVARh, or kVAh pulses

to external devices, or to toggle on and off to control a remote device or relay. See Using the
Pulse Output Port Function.

 Connect the CTs. See Wiring CTs.
 Connect the voltage and power the meter. See Connecting Voltage.

37

Find Quality Products Online at: [e-mail]

www.GlobalTestSupply.com

Using the Pulse Output Port Function

0

.00001

.00001

.00001

1

.001

.001

.001

2

.01

.01

.01

3

.1

.1

.1

4

1 1 1 5 10

10

10

≥6

100

100

100

Pulse output is used to generate pulses for external devices such as data loggers that can accept pulses
but do not have BACnet or Modbus capability. The PowerScout 24 can generate pulses based on
accumulated value(s) such as system kWh, system kVARh, and system kVAh. When a pulse is generated
by the meter, the pulse LED will briefly flash, otherwise it will remain dark.

When in Modbus, the pulse output is scaled by the Modbus data scalar register 44602. When in BACnet,
the pulse output is scaled by the CT Pulse Scalar object 12030. The pulse scalar table is the same as the
Modbus data scalar table. For example, when the data scalar is set to 3, each pulse will represent
.1kWh, .1kVAh and .1kVARh.

Data Scalar

kWh kVAh kVARh

Pulse Scalar Value

Table III-1: Pulse Scalar Values

For system pulse output:

 kWh pulse output—write 44001 into the pulse output configuration object.
 kVAh pulse output—write 44011 into the pulse output configuration object.
 kVARh pulse output—write 44008 into the pulse output configuration object.

Find Quality Products Online at: [e-mail]

www.GlobalTestSupply.com

38

MODBUS OUTPUT PORT REGISTERS

Modbus
Register

Offset Register Name Detailed Description

0 = output LOW (closed)
1 = output HIGH (open) [default]

Register 45110 must = 0 to use

0 = No pulses, Port may be used as an
on/off—

open/closed switch
44001 = System kWh pulses
44008 = System kVARh pulses
44011 = System kVAh pulses

0 = normally open (HIGH)
1 = normally closed (LOW)

45302 4401/5301

45310 5109/5309

45311 5110/5310

Port 1 output control
when used as an on/off—
open/closed switch

Digital Port 1
Configuration

Turns pulses on/off

Port 1 pulse output relay
type

Table III-2: Modbus Digital Port Pulse Output

BACNET OUTPUT PORT OBJECTS

Refer to the following two tables to configure the PowerScout output port when using the BACnet
protocol.

Object

Identifier

NA

Port 1 output control when used as an
on/off—open/closed switch

Object Name Detailed Description

0 = output LOW (closed) 1 = output HIGH
(open) [default]

Object 13100 present value must = 0 to use

0 = No pulses, Port may be used as an
on/off—

15000

15010 Port 1 pulse output relay type

Digital Port 1 Configuration
Turns pulses on/off

open/closed switch
44001 = System kWh pulses
44008 = System kVARh pulses
44011 = System kVAh pulses

0 = normally open (HIGH)
1 = normally closed (LOW)

Table III-3: BACnet Digital Port Pulse Output

39

Find Quality Products Online at: [e-mail]

www.GlobalTestSupply.com

Wiring CTs

1) Insert the CT wires into the connector/s. See the following CT Type Wiring Connections table for the

correct wiring configuration.

CT Type Wiring Connections

Split-Core *2 wire (+, –)

PowerScout 24

2) Attach the CTs onto the PowerScout connections labeled CT 1, CT 2 and CT 3.

3) Place the CTs on the phase wires of the load to be monitored and corresponding to the phase of the

voltage leads. The CT labeled CT 1 must be placed on L1 phase voltage wire, CT 2 must be on the L2
voltage and CT 3 on the L3 voltage. Refer to PhaseChek
the CT LEDs and verifying the CT installation.

™

later in this section for information about

RōCoil *3-wire (+, –, shield)

Find Quality Products Online at: [e-mail]

www.GlobalTestSupply.com

40

CONNECTING SPLIT-CORE STYLE MILLIVOLT CTS TO A LOAD

1) Open the CT by holding on to the removable leg and pulling it apart.

2) Connect CT around the load conductor to be measured. Make sure the maximum current of the

conductor does not exceed the maximum CT rating listed on the CT data sheet.

3) Carefully re-connect the removable leg while ensuring the CT core alignment matches. The

conductor should be in the inside of the CT window.

4) Repeat Steps 1-3 if you are using more than one CT.

Find Quality Products Online at: [e-mail]

www.GlobalTestSupply.com

41

5) Connect the white wire on the CT to the positive

D

? Correct orientation of a CT is

terminal on the measuring device.

6) Connect the black wire on the CT to the negative

terminal on the measuring device.

ID YOU KNOW

required to ensure proper measurement. If an
arrow is shown on the CT label, it should be
pointed toward the load. Otherwise, use the
instructions printed on the CT.

ONNECTING RŌCOIL CTS TO A LOAD

C

To install the RōCoil CT to the conductor(s):

1) Open the CT by squeezing the connector latch and

pulling it apart.

2) Connect the CT around the load conductor to be

measured. Orient the CT so that the arrow on the CT
case points towards the load. Make sure the maximum
current of the conductor does not exceed 5,000 amps.

3) Push the connector back together with the conductor

within the loop of the CT.

Repeat the above three steps if you are using more than
one RōCoil CT.

To connect the CTs wires to the terminals on the PowerScout:

4) Connect the CTs brown wire to the negative terminal on the

connector. See photo.

5) Connect the CTs white wire to the positive terminal on the

connector.

6) Connect the bare shield wire from the RōCoil to the “S”

shield terminal that is part of the connector. This reduces
interference and improves accuracy of the CT.

Find Quality Products Online at: [e-mail]

42

www.GlobalTestSupply.com

Negative

Positive

Shield

Connecting RōCoil CTs

Mini-hinged CTs attached to load

Find Quality Products Online at: [e-mail]

www.GlobalTestSupply.com

43

CT WIRE LEAD POLARITY

D

? The PowerScout is rated

CT Type CT Lead + CT Lead -

Rogowski (RōCoil) White Brown

Split Core mV White Black

Clamp On mV Red Black

Table II-1: CT Polarity

NOTE: The directionality for Rogowski CTs is the arrow points toward the load (e.g. motor).

* RōCoils have a shield wire which must be connected to the meter. This reduces interference and
improves accuracy of the CT.

Connecting Voltage

1) Connect the voltage leads (L1, L2, L3, and N, as necessary) to the meter. A voltage lead of 14 AWG

THHN Minimum 600VAC rating (or equivalent in order to maintain 600VAC safety rating of the

device) is required.

2) Connect the leads to the circuit breaker.
a) Refer to the wiring diagrams in for wiring

connection specifics. Follow local electrical codes
during this installation.

b) IMPORTANT: Verify the breaker is marked as the

disconnect breaker for the meter.

44

ID YOU KNOW

for 600V Over-Voltage Category III.
Cat III is for measurements performed in
the building. Examples are
measurements on distribution boards,
circuit-breakers, wiring including cables,
bus bars, junction boxes, switches, and
socket outlets in a fixed installation, and
equipment for industrial use. Other
equipment could include stationary
motors with a permanent connection to
the fixed installation.

Find Quality Products Online at: [e-mail]

www.GlobalTestSupply.com

POWERING THE METER

PowerScout meters are self-powered from the L1 and L2
lines. When 80–600VAC or DC is placed across the L1 and
L2 wires, the three phasing LEDs begin to flash in
sequence.

POWERSCOUT SINGLE-PHASE CONNECTIONS

The PowerScout meter can be used to monitor single­phase loads. There are several guidelines to keep in mind
about this type of connection:

1) The PowerScout is powered from a potential

between L1 and L2. This can be phase-to-phase
(230V) or phase-to-neutral (115V). With a single-phase 230V panel, the L1 and L2 voltage leads are
connected between the L1 and L2 voltage sources. With a 115V circuit, the L1 voltage lead is
connected to the L1 “hot lead,” and the L2 voltage lead is connected to neutral.

2) Each CT must be paired with the correct voltage source. The current and voltage need to be in-

phase for accurate measurements. For instance, CT 1 would monitor branch circuit supplied by
voltage source L1, and so on.

3) The neutral must be connected because the PowerScout uses line-to-neutral measurements for all

calculations.

A Typical 230V Single-Phase Panel Setup (US Wire Colors)

Connect the Black L1 voltage lead to Voltage L1, Red L2 voltage lead to L2 voltage, White Neutral voltage
lead to neutral. CT1 would monitor L1 loads and CT2 would monitor L2 loads. Based on the above
guidelines, CT3 can be used if the Blue L3 voltage lead is connected to either L1 or L2. As long as voltage
lead L3 and CT3 are in-phase, the PowerScout meter will provide correct kW readings. If the Blue L3
voltage lead was connected to L2 voltage source, then CT3 could monitor any L2 branch circuit. Or, if the
Blue L3 voltage lead was connected to L1 voltage source, then CT3 could monitor any L1 branch circuit.

Find Quality Products Online at: [e-mail]

www.GlobalTestSupply.com

45

A Typical 115V Single-Phase Panel Setup

Connect the Black L1 voltage lead to Voltage L1 (hot), Red L2 voltage lead to Neutral, and White N
voltage lead to neutral. CT1 would monitor the L1 load. CT3 can be used if the Blue L3 voltage lead is
connected to L1. CT3 could then monitor any L1 branch circuit.

System Values

System values are the sum of L1 + L2 + L3 measurements. System values may not be meaningful since
two different devices or loads can be monitored by a single PowerScout element.

When paired with the right voltage phase, each CT provides individual kW/kWh readings for that CT
channel.

Find Quality Products Online at: [e-mail]

www.GlobalTestSupply.com

46

PowerScout 24 Wiring Diagrams

The following diagrams use a PowerScout 24 board for illustration.

THREE WIRE DELTA

Use a Service Type 0 (zero) value for BACnet Object 12080 or a 0 (zero) value for Modbus Register 44607
on this wire configuration.

Find Quality Products Online at: [e-mail]

www.GlobalTestSupply.com

47

THREE PHASE, FOUR WIRE DELTA (WILD LEG)

Use a Service Type 0 (zero) value for BACnet Object 12080 or a 0 (zero) value for Modbus Register 44607
on this wire configuration.

Find Quality Products Online at: [e-mail]

www.GlobalTestSupply.com

48

SINGLE PHASE, TWO WIRE

For a Wye connection, use a Service Type 0 (zero) value for BACnet Object 12080 or a 0 (zero) value for
Modbus Register 44607 on this wire configuration.

For a Single Phase connection, use a Service Type 2 value for BACnet Object 12080 or a 2 value for
Modbus Register 44607 on this wire configuration.

Find Quality Products Online at: [e-mail]

www.GlobalTestSupply.com

49

SINGLE PHASE, THREE WIRE

For a Wye connection, use a Service Type 0 (zero) value for BACnet Object 12080 or a 0 (zero) value for
Modbus Register 44607 on this wire configuration.

For a Single Phase connection, use a Service Type 2 value for BACnet Object 12080 or a 2 value for
Modbus Register 44607 on this wire configuration.

Find Quality Products Online at: [e-mail]

www.GlobalTestSupply.com

50

FOUR WIRE WYE

Use a Service Type 0 (zero) value for BACnet Object 12080 or a 0 (zero) value for Modbus Register 44607
on this wire configuration.

Find Quality Products Online at: [e-mail]

51

www.GlobalTestSupply.com

Verifying Installation with PhaseChek™

PhaseChek1 is a feature of the PowerScout series instruments that simplifies installation by ensuring
proper CT orientation and avoiding faulty data collection.

VERIFYING THE POWERSCOUT METER SETUP USING THE LEDS

The PowerScout uses three bi-color PhaseChek LEDs for each element. These LEDs provide the following
information:

 All LEDs are green—the system power factor is greater than 0.55 and the CTs are properly

placed on the corresponding voltage phases.

 Any one LED is red—there is a phasing connection error.
 Two LEDs are red and one is green—two CTs are reversed.
 All three LEDs are red—all CTs are incorrectly connected.

DID YOU KNOW? If the total system
power factor is less than 0.55, the
LEDs will be red even if
connected properly. This
situation is rare but could occur
if, for example, the load to be
monitored is a lightly loaded
electric motor where it is
common for the power factor to
be less than 0.55 and the
corresponding LEDs will be red.

The following table describes the PhaseChek error conditions and the appropriate correction.

1

Patent No. 7,612,552. U.S. Patent and Trademark Office.

Find Quality Products Online at: [e-mail]

www.GlobalTestSupply.com

52

PHASECHEK ERROR TABLE

Setup is correct and the system power factor

CT1 CT2 CT3 Error Description Correction

  

  

is greater than 0.55.

-or­All CTs are disconnected.

All CTs are incorrectly connected,

-or-
The system power factor is less than 0.55.

Connect the CTs.

Rotate the CT connections by one position by
move CT 1 to CT 2, CT 2 to CT 3 and CT 3 to
CT 1, until all LEDs are green.

The system power factor is less than 0.55 but
the CTs are connected properly indicating a
light load.

  

   CT 1 and CT 2 are reversed. Switch the position of the CTs flashing red.

   CT 1 is swapped with either CT 2 or CT 3.

   CT 2 is swapped with either CT 1 or CT 3.

   CT 3 is swapped with either CT 1 or CT 2.

   CT 1 and CT 3 are reversed. Switch the position of the CTs flashing red.

CT 2 and CT 3 are reversed. Switch the position of the CTs flashing red.

Switch CT 1 with CT 2.

-or­Switch CT 1 with CT 3.

Switch CT 2 with CT 1.

-or­Switch CT 2 with CT 3.

Switch CT 3 with CT 1.

-or­Switch CT 3 with CT 2.

Table II-4: PhaseChek LED Error Resolution

Find Quality Products Online at: [e-mail]

53

www.GlobalTestSupply.com

Verifying Installation with the ViewPoint Software

In addition to verifying your connections with PhaseChek, you can also use the ViewPoint software to
check connections. Any computer running ViewPoint software, whether a laptop connected directly to
the meter or a PC connected to the network can bring up the software and learn information about the
connection, the communication protocols, meter setup, real-time values, and firmware version.

REAL-TIME VALUES

The Real-Time Values screen shows current readings to verify the system is configured properly. The tables display the real-time values of Volts, Amps, KW, KVA, KVAR, apparent power factor (aPF), and displacement power factor (dPF) for Phase L1, Phase L2 and Phase L3. This screen also displays the CT Type connected to the PowerScout and the CT Value.

Click Update to retrieve the values from the PowerScout.

-or-

Select the Auto-Update checkbox to automatically update approximately every 20 seconds.

Using Real-Time Values to Verify Setup

Values displayed for Volts, Amps, KW, etc., should make sense, meaning the values in the table are
relevant for the service being measured. This indicates the PowerScout setup is correct.

It may also be useful to use a handheld amp meter to test the current and compare its readings to the
values provided on the Real-Time Values screen.

Find Quality Products Online at: [e-mail]

www.GlobalTestSupply.com

54

READ/WRITE REGISTERS—READ/SET OBJECTS

The Read/Write Registers, Read/Set Objects screen provides diagnostic and
special configuration options, allowing the changing or viewing of the value of
any PowerScout register or object. The tab name changes depending on what
protocol (Modbus or BACnet) you are using. Its use is not required for a basic
setup.

3) Enter a register/object address. Refer to the Appendices, All Things

Modbus or BACnet Objects for a list of registers/objects and their
descriptions.

-or­Click List to select a register/object from the Register/Object Picker dialog

box.
Use the Register/Object Picker dialog box to search for registers/objects

by name. The selected value is entered on the Read/Write Registers—
Read/Set Objects screen.

2) Click Read to see the current value.

3) Enter a new value in the New Value field.

4) Click Write to change to the new value.

5) Click Clear Totals to clear accumulated data.

DID YOU KNOW? Accumulated data is
registers/objects with a time
reference, such as time since reset,
kWh, demands, etc.

Find Quality Products Online at: [e-mail]

www.GlobalTestSupply.com

55

Resetting BACnet Objects/Modbus Registers

Many of the PowerScout objects/registers are real-time values such as instantaneous watts or power
factor. However, some objects are accumulated values such as kWh, kVARh, kVAh and various Peak
Demand (kW) values.

To reset all BACnet accumulated objects at once:

 Write to object identifier 10140 “Clear Accumulated Values” current value 1234.0.

To reset all Modbus accumulated registers at once:

 Write to register 44066 “Clear Accumulated Measurements” current value 1234.

In ViewPoint, accumulating objects/registers can be reset using the Read/Set or Read/Write tab.

 Click Clear Totals at the bottom of the screen. A pop-up window with checkboxes for individual

elements is displayed. Select the checkbox for any or all element(s) whose accumulated data is
to be reset and click OK.

See the tables in the Appendices for a list all of the objects/registers available on the PowerScout
meters.

Find Quality Products Online at: [e-mail]

www.GlobalTestSupply.com

56

D

DENT Instruments recommends

FIRMWARE

The Firmware screen verifies the current firmware version and updates the PowerScout internal
firmware. Updating firmware is only supported in Modbus mode and is used to bring the software up to
date. See the appendix Firmware.

4) Click Show Version to see which version of

firmware is currently loaded in meter. If a
later version of firmware is available,
download it from the DENT Instruments
website.

ID YOU KNOW?

using 115,200 bps as the baud rate when
downloading firmware updates via a RS-485.
NOTE: There are no baud rate settings when
connected via USB or Ethernet.

2) Click Browse to access the Select a

Firmware Update File dialog box and select the .hex file downloaded from the website.

3) Click Update to download the latest version.

-or­Click Cancel Update to stop the download.

Find Quality Products Online at: [e-mail]

www.GlobalTestSupply.com

57

ALL THINGS MODBUS

DEVICE REGISTERS

Modbus Offset Register Description

44201 4200 Model Number 1st 2 bytes Model Name 10 bytes (ASCII Alpha-Numeric)

44202 4201 Model 2 “

44203 4202 Model 3 “

44204 4203 Model 4 “

44205 4204 Model Number last 2 bytes “

44206 4205 Serial Number 1st 2 bytes Serial Number 10 bytes (ASCII Alpha-Numeric)

44207 4206 Serial 2 “

44208 4207 Serial 3 “

44209 4208 Serial 4 “

44210 4209 Serial Number last 2 bytes “

44511 4510 Hardware ID Hardware revisions.

44069 4068 Firmware Major Revision Major Revision Level (big software releases)

44070 4069 Firmware Minor Revision Minor Revision Level (small software changes)

CONFIGURATION REGISTERS

Modbus Offset Register Description

40129 0128 Synchronize Register Multiple PowerScout’s synchronization register

44066 4065 Clear Accumulated

Measurements

44526 4525 Slave ID !1=DENT, 1=Veris; Sets SLAVE_ID to Veris or DENT

44602 4601 Data Scalar

Writing 1234 resets all 'H' registers, accumulated
PowerScout data (kWh, kWh, etc) stored in flash to
CAM Default value

A Value of 0-6 that changes the scaling of certain
registers

58

Find Quality Products Online at: [e-mail]

www.GlobalTestSupply.com

Modbus Offset Register Description

Voltage source = Select voltage phase to associate

Type (44607) is set to 2 (Single/Independent)

44603 4602 Demand Window Size Demand window size in minutes; default is 15 min

44604 4603 Volts Multiplier Multiply volts values by this scalar. Use with Step-

down Transformer. Affects all parameters that use
volts (i.e., kW)

44606 4605 Communication Setting Baud: 900=9600, 1900=19200, 3800=38400,

5700=57600, 7600 =76800, 11500=115200
Parity: Add 00 = NO, Add 10 = ODD, Add 20 = EVEN
Stop bit: Add 0 = 1 (UART does not permit 0 stop bits),

Add 1 = 1, Add 2 = 2
E.g., 901 = 9600 baud, no parity, 1 stop bit

44607 4606 Service Type A value of 0x0001 configures the meter for DELTA

A value of 0x0000 configures the meter for WYE

44609 4608 Set Line Frequency Line frequency setting for metering: 50=50 Hz,

60=60Hz

44612 4611 Communications Settings Write 1833 to change to BACnet mode

50016 10015 CT1 Rogowski mV/kA Number of mV per kA for a Rogowski CT

50017 10016 CT2 Rogowski mV/kA Number of mV per kA for a Rogowski CT

50018 10017 CT3 Rogowski mV/kA Number of mV per kA for a Rogowski CT

50100 10099 CT1 Integer Integer part of CT1

50101 10100 CT1 Decimal Fractional part of NV_CT1

50104 10103 CT1 Voltage Source

50105 10104 CT1 Amps Multiplier Amps multiplier= Multiply amps value by this scalar.

50125 10124 CT1 Type Select 1=mV or 2=Rogowski CT1s

50199 10198 CT1 Phase Shift Phase Shift X 100 +/-

50200 10199 CT2 Integer Integer part of CT2

50201 10200 CT2 Decimal Fractional part of NV_CT2

50225 10224 CT2 Type Select 1=mV or 2=Rogowski CT2s

with CT for power and energy calculations. 0= not
used,1=L1, 2=L2, 3=L3,4=L1-L2,5=L3-L2, 6=L1-L3,
default=L1. Note this register is only active if Service

For use with 5A CTs and single leg monitoring of a
three phase load. Affects all parameters that use
amps (e.g., kW). Whole numbers only.

50299 10298 CT2 Phase Shift Phase Shift X 100 +/-

59

Find Quality Products Online at: [e-mail]

www.GlobalTestSupply.com

Modbus Offset Register Description

Voltage source = Select voltage phase to associate

Type (44607) is set to 2 (Single/Independent)

50300 10299 CT3 Integer Integer part of CT3

50301 10300 CT3 Decimal Fractional part of NV_CT3

50304 10303 CT3 Voltage Source

50305 10304 CT3 Amps Multiplier Amps multiplier= Multiply amps value by this scalar.

50325 10324 CT3 Type Select 1=mV or 2=Rogowski CT3s

50399 10398 CT3 Phase Shift Phase Shift X 100 +/-

with CT for power and energy calculations. 0= not
used,1=L1, 2=L2, 3=L3,4=L1-L2,5=L3-L2, 6=L1-L3,
default=L1. Note this register is only active if Service

For use with 5A CTs and single leg monitoring of a
three phase load. Affects all parameters that use
amps (e.g., kW). Whole numbers only.

PULSE OUTPUT/INPUT REGISTERS

Modbus Offset Register Description

44400 4399 I/O port 1 status

44401 4400 I/O port 2 status

0 = input LOW (switch is closed)
1 = input HIGH (switch is open)

0 = input LOW (switch is closed)
1 = input HIGH (switch is open)

45100 5099

45101 5100

45102 5101

45103 5102

45104 5103

Configures the pulse input for
I/O port 1

I/O port 1 pulse input
accumulator LSW

I/O port 1 pulse input
accumulator MSW

I/O port 1 pulse input scaling
(integer)

I/O port 1 pulse input scaling

0 = off, pulse input disabled
1 = rising edge, pulse counter increments, falling

edges are ignored. If pulse output is enabled, it is
disabled when this configuration is set.

2 = falling edge, pulse counter increments, rising
edges are ignored. If pulse output is enabled, it is
disabled when this configuration is set.

3 = both edges pulse counter increments. If pulse
output is enabled, it is disabled when this
configuration is set. (Note when pulse is off, I/O
control is enabled)

Setting this register to a value other than 0, forces
register 45110 to 0.

Scaled pulse LSW

Scaled pulse MSW

Integer scale factor
(Scale = 45103 + 45104/1000)

x1000 decimal fraction of scale factor

60

Find Quality Products Online at: [e-mail]

www.GlobalTestSupply.com

Modbus Offset Register Description

(decimal)

0 = off, pulse input disabled
1 = rising edge, pulse counter increments, falling

edges are ignored. If pulse output is enabled, it is
disabled when this configuration is set.

2 = falling edge, pulse counter increments, rising
edges are irnored. If pulse output is enabled, it is
disabled when this configuration is set.

3 = both edges pulse counter increments. If pulse
output is enabled, it is disabled when this
configuration is set. (Note when pulse is off, I/O
control is enabled)

Setting this register to a value other than 0, forces
register 45210 to 0.

45200 5199

Configures the pulse input for
I/O port 2

45201 5200

45202 5201

45203 5202

45204 5203

45302 5301

45310 5309

45311 5310 Port 1 pulse output relay type

I/O port 2 pulse input
accumulator LSW

I/O port 2 pulse input
accumulator MSW

I/O port 2 pulse input scaling
(integer)

I/O port 2 pulse input scaling
(decimal)

Port 1 output control when
used as an on/off—open/closed
switch

Digital Port 1 Configuration
Turns pulses on/off

Scaled pulse LSW

Scaled pulse MSW

Integer scale factor
(Scale = 45203 + 45204/1000)

x1000 decimal fraction of scale factor

0 = output LOW (closed)
1 = output HIGH (open) [default]

Register 45310 must = 0 to use

0 = No pulses, Port may be used as an on/off—
open/closed switch
44001 = System kWh pulses
44008 = System kVARh pulses
44011 = System kVAh pulses

0 = normally open (HIGH)
1 = normally closed (LOW)

ABSOLUTE MEASUREMENT REGISTERS

Offset refers to a base of 40001.

Description

Modbus Offset Register

44001 4000 kWh System LSW System Total True Energy LSW (kWh)

44002 4001 kWh System MSW System Total True Energy MSW (kWh)

61

Find Quality Products Online at: [e-mail]

www.GlobalTestSupply.com

* System=sum of three phases

Description

Modbus Offset Register

System Total True Power (kW). Unsigned absolute

44003 4002 kW System

44004 4003 kW Demand System Max System Maximum Demand (peak demand).

44005 4004 kW Demand System Now Average Power (kW) for most recent demand window

(ABS) value of ABS (kW L1) + ABS (kW L2) + ABS (kW
L3)

* System=sum of three phases

44006 4005 kW System Max

44007 4006 kW System Min

44008 4007 kVARh System LSW System Total Reactive Energy LSW (kVARh)

44009 4008 kVARh System MSW System Total Reactive Energy MSW (kVARh)

44010 4009 kVAR System

44011 4010 kVAh System LSW System Total Apparent Energy LSW (kVAh)

44012 4011 kVAh System MSW System Total Apparent Energy MSW (kVAh)

44013 4012 kVA System

System Maximum Instantaneous kW

(Highest kW sample measured)

System Minimum Instantaneous kW

(Lowest kW sample measured)

System Total Reactive Power (kVAR). Unsigned
absolute (ABS) value of ABS (kVAR L1) + ABS (kVAR L2)
+ ABS (kVAR L3)

System Total Apparent Power (kVA). Unsigned WYE =
(kVA L1) + (kVA L2) + (kVA L3) Delta = SQRT (kW
system ^2 + kVAR system ^2)

44014 4013 Displacement PF System

44015 4014 Apparent PF System

44016 4015 Amps System Avg Average of all phases.

44017 4016 Volts Line to Line Avg Voltage Line to line (Volts) Average.

44018 4017 Volts Line to Neutral Avg Voltage Line to neutral (volts) Average.

44019 4018 Volts L1 to L2 Individual Phase to Phase Voltages

44020 4019 Volts L2 to L3 “

System Displacement Power Factor (PF). Register is
100x actual value.

System Apparent Power Factor (PF). Register is 100x
actual value.

62

Find Quality Products Online at: [e-mail]

www.GlobalTestSupply.com

Description

Modbus Offset Register

44021 4020 Volts L1 to L3 “

44022 4021 Line Frequency Line Frequency (Hz)

44023 4022 kWh L1 LSW Individual Phase True Energy LSW (kWh)

44024 4023 kWh L1 MSW Individual Phase True Energy MSW (kWh)

44025 4024 kWh L2 LSW “

44026 4025 kWh L2 MSW “

44027 4026 kWh L3 LSW “

44028 4027 kWh L3 MSW “

44029 4028 kW L1 Individual Phase True Powers (kW)

44030 4029 kW L2 “

* System=sum of three phases

44031 4030 kW L3 “

44032 4031 kVARh L1 LSW Individual Phase Reactive Energy LSW (kVARh)

44033 4032 kVARh L1 MSW Individual Phase Reactive Energy MSW (kVARh)

44034 4033 kVARh L2 LSW “

44035 4034 kVARh L2 MSW “

44036 4035 kVARh L3 LSW “

44037 4036 kVARh L3 MSW “

44038 4037 kVAR L1 Individual Phase Reactive Powers (kVAR)

44039 4038 kVAR L2 “

44040 4039 kVAR L3 “

44041 4040 kVAh L1 LSW Individual Phase Apparent Energy LSW (kVAh)

44042 4041 kVAh L1 MSW Individual Phase Apparent Energy MSW (kVAh)

44043 4042 kVAh L2 LSW “

63

Find Quality Products Online at: [e-mail]

www.GlobalTestSupply.com

Description

Modbus Offset Register

44044 4043 kVAh L2 MSW “

44045 4044 kVAh L3 LSW “

44046 4045 kVAh L3 MSW “

44047 4046 kVA L1 Individual Phase Apparent Powers (kVA)

44048 4047 kVA L2 “

44049 4048 kVA L3 “

44050 4049 Displacement PF L1 Individual Phase displacement Power Factor (PF)

44051 4050 Displacement PF L2 “

44052 4051 Displacement PF L3 “

44053 4052 Apparent PF L1 Individual Phase apparent Power Factors (PF)

* System=sum of three phases

44054 4053 Apparent PF L2 “

44055 4054 Apparent PF L3 “

44056 4055 Amps L1 Individual Phase Currents (A)

44057 4056 Amps L2 “

44058 4057 Amps L3 “

44059 4058 Volts L1 to Neutral Individual Phase to Neutral Voltages (V)

44060 4059 Volts L2 to Neutral “

44061 4060 Volts L3 to Neutral “

44062 4061 Time Since Reset LSW Seconds since KWH register was reset. LSW

44063 4062 Time Since Reset MSW Seconds since KWH register was reset. MSW

Internal sample count (gets cleared every minute):

44064 4063 Data Tick Counter

may be used to determine if sample read is a newer
sample than last read.

44080 4079 kW System Average

Equals KWH_SYSTEM_L&M ÷ (TimeSinceReset_L&M

64

Find Quality Products Online at: [e-mail]

www.GlobalTestSupply.com

Description

seconds /3600 seconds/Hr) (resettable)

Modbus Offset Register

44081 4080 kW Demand System Min System Minimum Demand (kW)

System Maximum Instantaneous kVA Demand (kVA,
resettable). It displays the default value after a CAM

44082 4081 kVA Demand System Max

44083 4082 kVA Demand System Now

44084 4083 kVAR Demand System Max

until 1 demand window elapses. After a power cycle or
CPU reset the value is not reset but it does not update
again until 1 demand window elapses.

System Average kVA Demand For the most recent
(current) Demand Window.(resettable) Displays the
default value after a CAM or reset, or power cycle.
Updates every min thereafter. True demand value
takes a demand period to get to actual value. Similar
to 44005

System Maximum kVAR Demand (kVAR, resettable). It
displays the default value after a CAM until 1 demand
window elapses. After a power cycle or CPU reset the
value is not reset but it does not update again until 1
demand window elapses.

* System=sum of three phases

POSITIVE POWER/ENERGY MEASUREMENT REGISTERS

Modbus Offset Register

* System=sum of three phases

46001 6000 Positive kWh System LSW System Positive True Energy LSW (kWh, resettable)

46002 6001 Positive kWh System MSW System Positive True Energy MSW (kWh, resettable)

46003 6002 Positive kW System System Positive Instantaneous Positive True Power

(kW) (net sum of all individual kWs, if sum is negative
value=0)

46004 6003 kW Demand System Max System Maximum Demand (peak demand).

46005 6004 kW Demand System Now Average Power (kW) for most recent demand window

46006 6005 Positive kW System Max System Net Highest Instantaneous Positive Draw

Since Reset (kW, resettable)

46007 6006 Positive kW System Min System Net Lowest Instantaneous Positive Draw Since

Reset (kW, resettable)

Description

65

Find Quality Products Online at: [e-mail]

www.GlobalTestSupply.com

Modbus Offset Register

Description

* System=sum of three phases

46008 6007 Positive kVARh System LSW System Net Positive Reactive Energy LSW (kVARh,

resettable)

46009 6008 Positive kVARh System MSW System Net Positive Reactive Energy MSW (kVARh,

resettable)

46010 6009 Positive kVAR System System Net Instantaneous Positive Reactive Power

(kVAR) (net sum of all individual kVARs, if sum is
negative value=0)

46011 6010 kVAh System LSW System Apparent Energy, LSW (resettable)

46012 6011 kVAh System MSW System Apparent Energy, MSW (resettable)

46013 6012 kVA System System Instantaneous Apparent Power

46014 6013 Positive Displacement PF

System

46015 6014 Positive Apparent PF System System Positive Apparent Power Factor (aPF);

46016 6015 Amps System Avg Average of the current in all phases.

46017 6016 Volts Line to Line Avg Average of the system line to line voltages.

46018 6017 Volts Line to Neutral Avg Average of the system line to neutral voltages.

46019 6018 Volts L1 to L2 Individual phase to phase voltages.

System Positive Displacement Power Factor (dPF);
Register is 100x actual value (If the System dPF
(44014) is positive, this register will contain that value
else it will be zero)

Register is 100x actual value (If the System aPF
(44015) is positive, this register will contain that value
else it will be zero)

66

Find Quality Products Online at: [e-mail]

www.GlobalTestSupply.com

Modbus Offset Register

Description

* System=sum of three phases

46020 6019 Volts L2 to L3 “

46021 6020 Volts L3 to L1 “

46022 6021 Measured Line Frequency Line frequency x 10 (e.g., 602 = 60.2 Hz). On startup,

20 point averaging array is filled with first frequency
read.

46023 6022 Positive kWh L1 LSW Individual Phase Positive True Energy LSW (kWh,

resettable)

46024 6023 Positive kWh L1 MSW Individual Phase Positive True Energy MSW (kWh,

resettable)

46025 6024 Positive kWh L2 LSW “

46026 6025 Positive kWh L2 MSW “

46027 6026 Positive kWh L3 LSW “

46028 6027 Positive kWh L3 MSW “

46029 6028 Positive kW L1 Individual Phase Instantaneous Positive True Powers

(kW)

46030 6029 Positive kW L2 “

46031 6030 Positive kW L3 “

46032 6031 Positive kVARh L1 LSW Individual Phase Positive Reactive Energy LSW

(kVARh, resettable)

46033 6032 Positive kVARh L1 MSW Individual Phase Positive Reactive Energy MSW

(kVARh, resettable)

46034 6033 Positive kVARh L2 LSW “

46035 6034 Positive kVARh L2 MSW “

46036 6035 Positive kVARh L3 LSW “

46037 6036 Positive kVARh L3 MSW “

67

Find Quality Products Online at: [e-mail]

www.GlobalTestSupply.com

Modbus Offset Register

Description

* System=sum of three phases

46038 6037 Positive kVAR L1 Individual Phase Positive Instantaneous Reactive

Powers (kVAR)

46039 6038 Positive kVAR L2 “

46040 6039 Positive kVAR L3 “

46041 6040 kVAh L1 LSW Individual Phase Apparent Energy LSW (kVAh,

resettable)

46042 6041 kVAh L1 MSW Individual Phase Apparent Energy MSW (kVAh,

resettable)

46043 6042 kVAh L2 LSW “

46044 6043 kVAh L2 MSW “

46045 6044 kVAh L3 LSW “

46046 6045 kVAh L3 MSW “

46047 6046 kVA L1 Individual Phase Instantaneous Apparent Powers

(kVA)

46048 6047 kVA L2 “

46049 6048 kVA L3 “

46050 6049 Positive Displacement PF L1 Individual Phase Positive Displacement Power Factors

(dPF); Register is 100x actual value (If the Individual
dPF (44050) is positive, this register will contain that
value else it will be zero)

46051 6050 Positive Displacement PF L2 “

46052 6051 Positive Displacement PF L3 “

46053 6052 Positive Apparent PF L1 Individual Phase Positive Apparent Power Factors

(aPF); Register is 100x actual value (If the Individual
aPF(44053) is positive, this register will contain that
value else it will be zero)

46054 6053 Positive Apparent PF L2 “

46055 6054 Positive Apparent PF L3 “

68

Find Quality Products Online at: [e-mail]

www.GlobalTestSupply.com

Modbus Offset Register

Description

* System=sum of three phases

46056 6055 Amps L1 Individual Phase Instantaneous Currents (A)

46057 6056 Amps L2 “

46058 6057 Amps L3 “

46059 6058 Volts L1 to Neutral Individual Instantaneous Phase to Neutral Voltages

(V)

46060 6059 Volts L2 to Neutral “

46061 6060 Volts L3 to Neutral “

46062 6061 Time Since Reset LSW (Seconds) Seconds since kWh, kVAh, kVARh and associated

Demand registers were reset. LSW (resettable)

46063 6062 Time Since Reset MSW

(Seconds)

46080 6079 Positive kW System Average Equals Positive KWH_SYSTEM_L&M ÷

46081 6080 kW Demand System Minimum Min Average power window (kW)

46082 6081 kVA Demand System Maximum Maximum Instantaneous kVA Demand (kW,

46083 6082 kVA Demand System Now System Average kVA Demand for the most recent

46084 6083 kVAR Demand System Max System Maximum kVAR Demand (kVAR, resettable). It

Seconds since CAM. MSW

(TimeSinceReset_L&M seconds /3600 seconds/Hr)
(resettable)

resettable).

(current) Demand Window (resettable).

displays the default value after a CAM until 1 demand
window elapses. After a power cycle or CPU reset the
value is not reset but it does not update again until 1
demand window elapses.

NEGATIVE POWER/ENERGY MEASUREMENT REGISTERS

Modbus Offset Register

47001 7000 Negative kWh System LSW System Negative True Energy LSW (kWh, resettable)

69

Find Quality Products Online at: [e-mail]

www.GlobalTestSupply.com

Detailed Description

* System=sum of three phases

Modbus Offset Register

Detailed Description

* System=sum of three phases

47002 7001 Negative kWh System MSW System Negative True Energy MSW (kWh, resettable)

47003 7002 Negative kW System System Negative Instantaneous Negative True Power

(kW) (net sum of all individual kWs, if sum is positive
value=0)

47004 7003 kW Demand System Max System Maximum Demand (peak demand).

47005 7004 kW Demand System Now Average Power (kW) for most recent demand window

47006 7005 Negative kW System Max System Net Highest Instantaneous Negative Draw

Since Reset (kW, resettable)

47007 7006 Negative kW System Min System Net Lowest Instantaneous Negative Draw

Since Reset (kW, resettable)

47008 7007 Negative kVARh System LSW System Net Negative Reactive Energy LSW (kVARh,

resettable)

47009 7008 Negative kVARh System MSW System Net Negative Reactive Energy MSW (kVARh,

resettable)

47010 7009 Negative kVAR System System Net Instantaneous Negative Reactive Power

(kVAR) (net sum of all individual kVARs, if sum is
positive value=0)

47011 7010 kVAh System LSW System Apparent Energy LSW (kVAh, resettable)

47012 7011 kVAh System MSW System Apparent Energy MSW (kVAh, resettable)

47013 7012 kVA System System Instantaneous Apparent Power (kVA)

47014 7013 Negative Displacement PF

System

47015 7014 Negative Apparent PF System System Negative Apparent Power Factor (aPF);

System Negative Displacement Power Factor (dPF);
Register is 100x actual value (If the System dPF
(44014) is Negative, this register will contain that
value else it will be zero)

Register is 100x actual value (If the System aPF
(44015) is Negative, this register will contain that
value else it will be zero)

70

Find Quality Products Online at: [e-mail]

www.GlobalTestSupply.com

Modbus Offset Register

Detailed Description

* System=sum of three phases

47016 7015 Amps System Avg Average of the current in all phases.

47017 7016 Volts Line to Line Avg Average of the system line to line voltages.

47018 7017 Volts Line to Neutral Avg Average of the system line to neutral voltages.

47019 7018 Volts L1 to L2 Individual phase to phase voltages.

47020 7019 Volts L2 to L3 “

47021 7020 Volts L3 to L1 “

47022 7021 Measured Line Frequency Line frequency x 10 (e.g., 602 = 60.2 Hz). On startup,

20 point averaging array is filled with first frequency
read.

47023 7022 Negative kWh L1 LSW Individual Phase Negative True Energy LSW (kWh,

resettable)

47024 7023 Negative kWh L1 MSW Individual Phase Negative True Energy MSW (kWh,

resettable)

47025 7024 Negative kWh L2 LSW “

47026 7025 Negative kWh L2 MSW “

47027 7026 Negative kWh L3 LSW “

47028 7027 Negative kWh L3 MSW “

47029 7028 Negative kW L1 Individual Phase Instantaneous Negative True Powers

(kW)

47030 7029 Negative kW L2 “

71

Find Quality Products Online at: [e-mail]

www.GlobalTestSupply.com

Modbus Offset Register

Detailed Description

* System=sum of three phases

47031 7030 Negative kW L3 “

47032 7031 Negative kVARh L1 LSW Individual Phase Negative Reactive Energy LSW

(kVARh, resettable)

47033 7032 Negative kVARh L1 MSW Individual Phase Negative Reactive Energy MSW

(kVARh, resettable)

47034 7033 Negative kVARh L2 LSW “

47035 7034 Negative kVARh L2 MSW “

47036 7035 Negative kVARh L3 LSW “

47037 7036 Negative kVARh L3 MSW “

47038 7037 Negative kVAR L1 Individual Phase Negative Instantaneous Reactive

Powers (kVAR)

47039 7038 Negative kVAR L2 “

47040 7039 Negative kVAR L3 “

47041 7040 kVAh L1 LSW Individual Phase Apparent Energy LSW (kVAh,

resettable)

47042 7041 kVAh L1 MSW Individual Phase Apparent Energy MSW (kVAh,

resettable)

47043 7042 kVAh L2 LSW “

47044 7043 kVAh L2 MSW “

47045 7044 kVAh L3 LSW “

47046 7045 kVAh L3 MSW “

47047 7046 kVA L1 Individual Phase Instantaneous Apparent Powers

(kVA)

47048 7047 kVA L2 “

47049 7048 kVA L3 “

72

Find Quality Products Online at: [e-mail]

www.GlobalTestSupply.com

Modbus Offset Register

Detailed Description

* System=sum of three phases

47050 7049 Negative Displacement PF L1 Individual Phase Negative Displacement Power

Factors (dPF); Register is 100x actual value (If the
Individual dPF(44050) is Negative, this register will
contain that value else it will be zero)

47051 7050 Negative Displacement PF L2 “

47052 7051 Negative Displacement PF L3 “

47053 7052 Negative Apparent PF L1 Individual Phase Negative Apparent Power Factors

(aPF); Register is 100x actual value (If the Individual
aPF (44053) is Negative, this register will contain that
value else it will be zero)

47054 7053 Negative Apparent PF L2 “

47055 7054 Negative Apparent PF L3 “

47056 7055 Amps L1 Individual Phase Instantaneous Currents (A)

47057 7056 Amps L2 “

47058 7057 Amps L3 “

47059 7058 Volts L1 to Neutral Individual Instantaneous Phase to Neutral Voltages

(V)

47060 7059 Volts L2 to Neutral “

47061 7060 Volts L3 to Neutral “

47062 7061 Time Since Reset LSW (Seconds) Seconds since kWh, kVAh, kVARh and associated

Demand registers were reset. LSW (resettable)

47063 7062 Time Since Reset MSW

(Seconds)

47080 7079 Negative kW System Average Equals Negative KWH_SYSTEM_L&M ÷

47081 7080 kW Demand System Minimum Min Average power window (kW)

Seconds since CAM. MSW

(TimeSinceReset_L&M seconds /3600 seconds/Hr)
(resettable)

47082 7081 kVA Demand System Maximum Maximum Instantaneous kVA Demand (kW,

resettable).

73

Find Quality Products Online at: [e-mail]

www.GlobalTestSupply.com

Modbus Offset Register

Detailed Description

* System=sum of three phases

47083 7082 kVA Demand System Now System Average kVA Demand for the most recent

(current) Demand Window (resettable).

47084 7083 kVAR Demand System Max System Maximum kVAR Demand (kVAR, resettable). It

displays the default value after a CAM until 1 demand
window elapses. After a power cycle or CPU reset the
value is not reset but it does not update again until 1
demand window elapses.

PROTOCOL COMMANDS

The Modbus messaging protocol used for communication follows the Modbus RTU protocol described in
this section. Each register read from or written to the PowerScout is a 16-bit unsigned, positive integer
value. The PowerScout supports the following commands.

Command Name

Read Holding Registers 03 Used to read the data values from the PowerScout.

Write Single Register 06 Used to write a single holding register to a PowerScout.

Report Slave ID 11 Used to read information from the identified PowerScout.

Command

Number (Hex)

Description

Table IV-1: Supported Modbus Commands

The following guidelines are used for these Modbus commands:

 All values are hexadecimal, spaces are not included.
 The address is the value of the address switch on the PowerScout. This must be different for

each PowerScout on a single Modbus network.

 The register’s high-order and low-order bits are the 16-bit value of a single, or first, register to

be accessed for a read or write.

 The CRC is the 16-bit CRC value. Note that the CRC's LSB and MSB are reversed in comparison to

those for the registers and data.

Read Holding Registers

This command reads the contents of a contiguous block of holding registers containing data values from
the PowerScout. When a read command is received, the PowerScout sends a response that includes the
values of the requested registers.

Command Information

PowerScout address nn 37

Command number 03 03

First register to read – high order bits xx 00

Command

Layout

Example

Command

74

Find Quality Products Online at: [e-mail]

www.GlobalTestSupply.com

Command Information

D

? The value sent as the

First register to read – low order bits xx 0C

Number of registers to read – high order bits xx 00

Number of registers to read – low order bits xx 01

CRC low order bits xx 41

CRC high order bits xx 9F

Command

Layout

Example

Command

Table IV-2: Format for Modbus Command 03

Command Example

This command reads from a PowerScout with an address switch setting of 37 hex, reading one byte
starting at register offset 0C hex. Note that offset 12 corresponds to Modbus register 40013. All values
are hexadecimal.

Example Request

Field Name

PowerScout address 37 PowerScout address 37

Command 03 Command 03

Starting register address to read– high order bits 00 Byte count 02

Starting register address to read– low order bits 0C Register value –high order bits 00

Number of registers to read – high order bits 00 Register value – low order bits 00

Number of registers to read – low order bits 01 CRC low order bits 70

CRC low order bits 41 CRC high order bits 40

CRC high order bits 9F

Command

(Hex)

Response

Field Name

Response

(Hex)

Table IV-3: Format for Modbus Command 03

Command: 3703000C0001419F

Response: 37030200007040

The response is from the PowerScout at address 37. Two
bytes were read from the requested register, 000C. The
value of the registers read was 0000. The CRC value was

4070. The number of registers read must be between 1

and 125 inclusive.

ID YOU KNOW

register address in the read and write
Modbus commands is not the register
listed in the table, instead an
abbreviated version is sent. The
actual register address sent is the
Modbus register value minus 40001.
For example, the address sent in the
command message for register 40025
is actually 0024 (0018 hexadecimal),
and the address sent for register
44062 is actually 4061 (0FDD
hexadecimal).

75

Find Quality Products Online at: [e-mail]

www.GlobalTestSupply.com

Write Single Register

This command writes to a single holding register of the PowerScout. The normal response is an echo of
the request, returned after the register contents are written.

Command Information

PowerScout address nn 37

Command number 06 06

Register to write – high order bits xx 00

Register to write – low order bits xx 00

Register value to write – high order bits xx 00

Register value to write – low order bits xx 00

CRC low order bits xx 8C

CRC high order bits xx 5C

Command

Layout

Example

Command

Table IV-4: Format for Modbus Command 06

Example Command

This command writes to a PowerScout with an address switch setting of 37 hex (55 in decimal), writing
one byte at register 000C, and writing a value of 00 to clear the KWH registers. The data value of 0 is
sent to register 0. Note that offset 0 corresponds to Modbus register 40001. The CRC is 5C8C. All values
are hexadecimal.

Example Request

Field Name

Command

(Hex)

Response

Field Name

Response

(Hex)

PowerScout address 37 PowerScout address 37

Command number 06 Command number 06

Register to write – high order bits 00 Register written to – high order bits 00

Register to write – low order bits 00 Register written to – low order bits 00

Register value to write – high order bits 00 Register value written – high order bits 00

Register value to write – low order bits 00 Register value written – low order bits 00

CRC low order bits 8C CRC low order bits 8C

CRC high order bits 5C CRC high order bits 5C

Table IV-5: Format for Modbus Command 03

Command: 3706000000018C5C

Response: 3706000000018C5C

The response is from the PowerScout at address 37. One byte was written to at the requested register,

0000. The value written was 0000. The CRC value was 5C8C. An echo of the original command after the

contents are written is a valid response.

76

Find Quality Products Online at: [e-mail]

www.GlobalTestSupply.com

Error Response

If the first register in this write command is not in the valid range of registers, the PowerScout returns an
error message.

Report Slave ID

This command is used to read the description, the current status and other information specific to a
remote device. A normal response includes the data contents specific to the device.

Command Information

PowerScout address nn 37

Command number 11 11

Command

Layout

Example

Command

Table IV-6: Format for Modbus Command 11 (17 in decimal)

Example Command

Example Request

Field Name

PowerScout address 37 PowerScout address 37

Command number 11 Command number 11

CRC low order bits D7 Byte count

CRC high order bits 8C Slave ID

Run indicator status

Additional data

Command

(Hex)

Response

Field Name

Response

(Hex)

Table IV-7: Format for Modbus Command 11 (17 in decimal)

Slave ID

The PowerScout uses the following default format for the slave ID:

DENT Instruments PowerScout 24, Serial Numb er, FW Rev Major Revisio n. Minor Revision, Scala r X

Example:

DENT Instruments PowerScout 24, PS3912001, FW Rev 1.0, Scalar 3

NOTE: See VERIS H8035/H8036 Emulation for slave ID structure while in Veris emulation.

Find Quality Products Online at: [e-mail]

www.GlobalTestSupply.com

77

ALL THINGS BACNET

DEVICE OBJECTS

Object

Identifier Name Description

10080 Hardware ID Hardware revisions

10090 Features New features

10130 Reset Processor Processor reset

10150 PowerScout Element ID Used for ViewPoint to determine which element is being read & total

number of elements available. Element index multiplied by 256 +
number of elements.

CONFIGURATION OBJECTS

Object

Identifier

Name Description

10020 Data Acquisition Tick Internal sample count (gets cleared every minute): may be used to

determine if sample read is a newer sample than last read.

10140 Clear Accumulated

Measurements

10190 Communications protocol Used to change between BACnet and Modbus communications

12003 CT3 Phase Shift CT3 phase shift (degrees)

12011 CT1 Value CT1 Value

12012 CT2 Value CT2 Value

12013 CT3 Value CT3 Value

12030 CT Pulse Scalar Changes the scaling of the output pulses

12040 Demand Window Demand window size in minutes; default is 15 min

12050 Volts Multiplier Multiply volts values by this scalar. For use with stepdown

Writing 1234 to the present value will reset all the accumulator
objects (kWh, kVAh, kVARh)

protocols.

transformer. Affects all parameters that use volts.

12061 CT1 Amps Multiplier Multiply CT1 amps values by this scalar. For use with stepdown

transformer. Affects all parameters that use amps.

78

Find Quality Products Online at: [e-mail]

www.GlobalTestSupply.com

Object

Identifier Name Description

12062 CT2 Amps Multiplier Multiply CT2 amps values by this scalar. For use with stepdown

transformer. Affects all parameters that use amps.

12063 CT3 Amps Multiplier Multiply CT3 amps values by this scalar. For use with stepdown

transformer. Affects all parameters that use amps.

12070 Com Settings Baud: 900=9600, 1900=19200, 3800=38400, 5700=57600,

7600=76800, 11500=115200

Parity: Add 00 = NO, Add 10 = ODD, Add 20 = EVEN

Stop bit: Add 0 = 1 (UART does not permit 0 stop bits), Add 1 = 1, Add
2 = 2

E.g., 901 = 9600 baud, no parity, 1 stop bit

12080 Service Type A value of 1 configures the meter for Delta.

A value of 0 configures the meter for Wye.

12090 Line Frequency Line frequency setting for metering. 50 = 50 Hz, 60 = 60 Hz

12121 CT1 Rogowski mV/kA Number of mV per kA for a Rogowski CT

12122 CT2 Rogowski mV/kA Number of mV per kA for a Rogowski CT

12123 CT3 Rogowski mV/kA Number of mV per kA for a Rogowski CT

12131 CT1 Type 1=MilliVolt, 2=Rogowski

12132 CT2 Type 1=MilliVolt, 2=Rogowski

12133 CT3 Type 1=MilliVolt, 2=Rogowski

79

Find Quality Products Online at: [e-mail]

www.GlobalTestSupply.com

PULSE OUTPUT/INPUT OBJECTS

Object

Identifier Name Description

0 = off, pulse input disabled
1 = rising edge, pulse counter increments, falling edges are ignored. If

pulse output is enabled, it is disabled when this configuration is set.
2 = falling edge, pulse counter increments, rising edges are ignored. If

13040

Configures the pulse input for
I/O port 1

pulse output is enabled, it is disabled when this configuration is set.
3 = both edges pulse counter increments. If pulse output is enabled,

it is disabled when this configuration is set. (Note when pulse is off,
I/O control is enabled)

Setting this register to a value other than 0, forces register 45110 to

0.

13050

13060 I/O port 1 pulse input x1000 decimal fraction of scale factor

13070

13080

13090 I/O port 2 pulse input scaling x1000 decimal fraction of scale factor

15000

I/O port 1 pulse input
accumulator

Configures the pulse input for
I/O port 2

I/O port 2 pulse input
accumulator

Digital Port 1 Configuration
Turns pulses on/off

Scaled pulse

0 = off, pulse input disabled
1 = rising edge, pulse counter increments, falling edges are ignored. If

pulse output is enabled, it is disabled when this configuration is set.
2 = falling edge, pulse counter increments, rising edges are irnored. If

pulse output is enabled, it is disabled when this configuration is set.
3 = both edges pulse counter increments. If pulse output is enabled,

it is disabled when this configuration is set. (Note when pulse is off,
I/O control is enabled)

Setting this register to a value other than 0, forces register 45210 to

0.

Scaled pulse

0 = No pulses, Port may be used as an on/off—
open/closed switch
44001 = System kWh pulses
44008 = System kVARh pulses
44011 = System kVAh pulses

15010 Port 1 pulse output relay type

0 = normally open (HIGH)
1 = normally closed (LOW)

80

Find Quality Products Online at: [e-mail]

www.GlobalTestSupply.com

ABSOLUTE/NET VALUE MEASUREMENT OBJECTS

System=sum of three phases.

Object

Identifier Name

1000 kW Demand System Maximum System Maximum Demand (peak demand) (Unsigned/Absolute)

1010 kW Demand System Now Average Power (kW) for most recent demand window

(Unsigned/Absolute)

1020 kW Demand System Minimum Min Average power window (kW) (Unsigned/Absolute)

1030 kW System System True Power (kW). Unsigned absolute (ABS) value of

ABS (kW L1) + ABS (kW L2) + ABS (kW L3)

1031 kW System Net System Power (kW) Signed net value of (kW L1) + (kW L2) + (kW L3)

1060 kW System Average Equals kWh System / (Time Since Reset /3600 seconds/Hr)

(resettable)

1100 kW System Maximum System Highest Instantaneous Draw Since Reset (kW)

1130 kW System Minimum System Lowest Instantaneous Draw Since Reset (kW, resettable)

* System=sum of three phases

Description

1160 kW L1 Individual Phase True Power (kW) (Signed)

1190 kW L2 “

1220 kW L3 “

2000 kWh System Total System True Energy (kWh) (Unsigned/Absolute)

3000 Volts Line to Line Average Voltage Line to line Average

3010 Volts Line to Neutral Average Voltage Line to neutral Average

3020 Volts L1 to L2 Individual Phase to Phase Voltages

3030 Volts L2 to L3 “

3040 Volts L1 to L3 “

3050 Volts L1 to Neutral Individual Phase to Neutral Voltages (V)

3060 Volts L2 to Neutral “

81

Find Quality Products Online at: [e-mail]

www.GlobalTestSupply.com

Object

Identifier Name

3070 Volts L3 to Neutral “

4010 Amps System Average Average of all phases.

4020 Amps L1 Individual Phase Currents (A)

4030 Amps L2 “

4040 Amps L3 “

5000 kVAR System System Total Reactive Power (kVAR). Unsigned absolute (ABS) value

of ABS (kVAR L1) + ABS (kVAR L2) + ABS (kVAR L3)

5001 kVAR System Net System Total Reactive Power (kVAR). Signed net value of (kVAR L1)

+ (kVAR L2) + (kVAR L3)

5030 kVAR L1 Individual Phase Reactive Energy LSW (kVARh) (Signed)

5060 kVAR L2 “

* System=sum of three phases

Description

5090 kVAR L3 “

5120 kVAR Demand System Max System Maximum Instantaneous kVAR Demand (kVA, resettable). It

displays the default value after a CAM until 1 demand window
elapses. After a power cycle or CPU reset the value is not reset but
it does not update again until 1 demand window elapses.
(Unsigned/Absolute)

5130 kVAR Demand System Now Average kVAR demand for most recent window (resettable).

Displays the default value after a CAM or reset, or power cycle.
Updates every min thereafter. True demand value takes a demand
period to get to actual value. (Unsigned/Absolute)

6010 kVARh System System Total Reactive Energy (Unsigned/Absolute)

7000 kVAh System Total System Total Apparent Energy (Unsigned/Absolute)

8000 kVA System System Total Apparent Power (kVA). Unsigned absolute (ABS) value

of ABS (kVA L1) + ABS (kVA L2) + ABS (kVA L3)

8001 kVA System Net System Net Apparent Power (kVA). Signed net value of (kVA L1) +

(kVA L2) + (kVA L3)

8010 kVA L1 Individual Phase Apparent Powers (kVA) (signed)

8020 kVA L2 Sign is set to the sign of the kW

82

Find Quality Products Online at: [e-mail]

www.GlobalTestSupply.com

Object

Identifier Name

8030 kVA L3 “

8040 kVA Demand System Max System Maximum Instantaneous kVA Demand (kVA, resettable). It

displays the default value after a CAM until 1 demand window
elapses. After a power cycle or CPU reset the value is not reset but
it does not update again until 1 demand window elapses.
(Unsigned/Absolute)

8050 kVA Demand System Now Average kVA for most recent demand window (resettable). Displays

the default value after a CAM or reset, or power cycle. Updates
every min thereafter. True demand value takes a demand period to
get to actual value. (Unsigned/Absolute)

9000 Displacement PF System System Total Power Factor (PF) (Signed)

9030 Apparent PF System System Total Power Factor (PF) (Signed)

9060 Displacement PF L1 Individual Phase displacement Power Factor (PF)

9090 Displacement PF L2 “

* System=sum of three phases

Description

9120 Displacement PF L3 “

9150 Apparent PF L1 Individual Phase apparent Power Factors (PF)

9180 Apparent PF L2 “

9210 Apparent PF L3 “

10000 Measured Line Frequency Line Frequency (Hz)

10010 Time Since Reset Seconds since accumulator registers were reset.

83

Find Quality Products Online at: [e-mail]

www.GlobalTestSupply.com

POSITIVE POWER/ENERGY MEASUREMENT OBJECTS

Object

Identifier

1080 kW System Average Positive Equals kWh System Positive / (Time Since Reset /3600 seconds/Hr)

1110 kW System Maximum Positive System Highest Instantaneous Positive Draw Since Reset (kW)

1140 kW System Minimum Positive System Lowest Instantaneous Positive Draw Since Reset (kW,

2010 kWh System Total Positive System True Energy (kWh) Positive (Signed Net)

2040 kWh L1 Positive

2070 kWh L2 Positive “

2100 kWh L3 Positive “

6010 kVARh System System Total Reactive Energy (Signed Net)

6020 kVARh System Total Positive

6050 kVARh L1 Positive

6080 kVARh L2 Positive “

Name

* System=sum of three phases

(resettable) (Signed Net)

(Signed Net)

resettable)

Individual Phase True Energy (kWh) (Signed)

System True Energy (kVARh) Positive (Signed Net)

Individual Phase Reactive Energy (kVAR) (Signed)

Description

6110 kVARh L3 Positive “

7001 kVAh System Total Positive System Total Positive Apparent Energy (kVAh) (Signed Net)

Accumulates only when kW is positive

7020 kVAh L1 Positive Individual Phase Apparent Energy (kVAh) (Signed)

7050 kVAh L2 Positive “

7080 kVAh L3 Positive “

84

Find Quality Products Online at: [e-mail]

www.GlobalTestSupply.com

NEGATIVE POWER/ENERGY MEASUREMENT OBJECTS

Object

Identifier

1090 kW System Average Negative Equals kWh System Negative / (Time Since Reset /3600 seconds/Hr)

1120 kW System Maximum Negative System Highest Instantaneous Negative Draw Since Reset (kW)

1150 kW System Minimum Negative System Lowest Instantaneous Negative Draw Since Reset (kW,

2020 kWh System Total Negative System True Energy (kWh) Negative (Signed Net)

2050 kWh L1 Negative Individual Phase True Energy (kWh) (Signed)

2080 kWh L2 Negative “

2110 kWh L3 Negative “

6030 kVARh Sys Negative System Total Reactive Energy (Signed Net)

6060 kVARh L1 Negative Individual Phase Reactive Energy (kVARh) (Signed)

6090 kVARh L2 Negative “

6120 kVARh L3 Negative “

7002 kVAh System Total Negative System Total Negative Apparent Energy (Signed Net)

7030 kVAh L1 Negative Individual Phase Apparent Energy (kVAh) (Signed)

Name

(resettable)

resettable)

Detailed Description

* System=sum of three phases

7060 kVAh L2 Negative “

7090 kVAh L3 Negative “

85

Find Quality Products Online at: [e-mail]

www.GlobalTestSupply.com

APPENDICES

Appendix A—Connecting Multiple PowerScouts to an RS-485 Network

This section describes setting up a network with multiple PowerScout instruments using the BACnet or
Modbus communication protocol. An RS-485 network can support up to 127 PowerScout 24 meters
connected to a single BACnet client for monitoring and recording power usage at multiple locations
within a single site. Up to 30 PS24 meters may be connected to Modbus.

COMMUNICATION PROTOCOL

BACnet MS/TP and Modbus RTU are standard communication protocols that allow for communication
between a client and multiple devices connected to the same network. RS-485 is the protocol standard
used by PowerScout meters as the hardware’s physical interface while BACnet or Modbus is the
networking protocol.

DAISY CHAIN LAYOUT FOR RS-485 NETWORK

When multiple devices are connected, the devices need to be connected in a daisy chain. A daisy chain
means that all plus (+) connections are chained together and all minus (-) connections are chained
together across the network.

A network containing multiple devices requires a unique address for each device. This allows the master
device to identify and communicate with each slave. The BACnet/Modbus network administrator must
assign a unique network address to each PowerScout 24 using the rotary switches SW1, SW2, and SW3.

Other network layouts, i.e., star, are not recommended when using the RS-485 standard.

NETWORKING USING THE BACNET MS/TP/MODBUS RTU PROTOCOL

1) Install the RS-485 cable on the RS-485 communications terminal block.

2) Set a unique address for each device using the table in Establishing Communication Protocol in the

Prepping for Field Installation section.

Find Quality Products Online at: [e-mail]

www.GlobalTestSupply.com

86

Appendix B—Firmware Updates

D

? If

When connected via RS-485, select
the baud rate of 115200.

INSTALLING FIRMWARE UPDATES FOR THE POWERSCOUT

PowerScout firmware updates are available from DENT Instruments, typically contained in a zip file that
can be downloaded, unzipped and installed using ViewPoint. The PowerScout 24 requires ViewPoint 4.1
or later.

Check the DENT Instruments website for the latest version of
firmware:

html

DOWNLOADING AND INSTALLING FIRMWARE

http://www.dentinstruments.com/downloads_data_logger_power_meter_drivers_software.

1) Download the zip file containing the firmware. Extract the zip file to a folder

on the computer.

2) Connect the computer to the PowerScout meter. Refer to Firmware at the

end of the Field Installation section. If connectivity fails with the 9600 baud
rate, refer to the Troubleshooting section in Appendix E.

3) Select the baud rate for loading the firmware to the PowerScout meter. A

baud rate of 9600 downloads the firmware to the PowerScout in
approximately six minutes. A faster baud rate can be selected to reduce the
time by approximately 2.5 minutes. Change the baud rate using the Communications tab and
selecting the desired baud rate. The baud rate is synchronized between ViewPoint and the
PowerScout meter by clicking the Connect button.

ID YOU KNOW

not using a USB
connection, the
PowerScout must be
in Modbus mode
before firmware can
be updated.

4) Select the Firmware tab in ViewPoint. Click Browse to locate the extracted firmware files. Click

Update to start the firmware update.

ViewPoint displays a message window confirming a successful update when the update completes.

5) If the baud rate was changed via an RS-485 for the firmware update, restore the baud rate to its

original setting.

Find Quality Products Online at: [e-mail]

87

www.GlobalTestSupply.com

Appendix C—VERIS H8035/H8036 Emulation

The PowerScout meter can be used as a direct replacement for the Veris, Inc. H8035/H8036 series of
networked power meters. This mirroring of the Veris Modbus register assignments makes replacement
with a PowerScout meter simple. However, because the number of parameters that the Veris meters
measure is less than half of what the PowerScout
the table need to be used to utilize the additional capabilities of the PowerScout.

Writing a 1 to register 44526 sets the Slave ID to Veris mode and ViewPoint lists the Veris registers in the
ViewPoint Read/Write Registers tab.

When register 44526 contains a 1 for Veris mode, the Slave ID command format is:

91hFFh(Veris type), Full-Data, Modbus, (CT value) Amp

The following is an example command with CT set for 100A:

91hFFhVeris H8036-0100-2, Full-Data, Modbus, 100 Amp

Example command explanation:

 91h = version control
 FFh = standard for active

can measure, the other Modbus registers described in

The 91h and FFh are 4 bytes in front of the string that are not displayed in the RTU.

CT Amperage Rating Veris Model Number

CT ≤ 100A

100A < CT ≤ 300A

300A < CT ≤ 400A

400A < CT ≤ 800A

800A < CT ≤ 1600A

CT >1600A

Veris Type = H8036-0100-2
CT Value = 100A

Veris Type = H8036-0300-2
CT Value = 300A

Veris Type = H8036-0400-3
CT Value = 400A

Veris Type = H8036-0800-3
CT Value = 800A

Veris Type = H8036-1600-4
CT Value = 1600A

Veris Type = H8036-2400-4
CT Value = 2400A

Table C-1: CT Amp Rating to Veris Models

88

Find Quality Products Online at: [e-mail]

www.GlobalTestSupply.com

VERIS MODBUS INTEGER REGISTERS

Modbus
Register

40001 0 kWh System LSW System True Energy (kWh, Resettable)

40002 1 kWh System MSW System True Energy (kWh, Resettable)

40003 2 kW System System True Power (kW)

40004 3 kVAR System System Reactive Power (kVAR)

40005 4 kVA System System Apparent Power (kVA)

40006 5 Apparent PF System System Apparent Power Factor (PF)

40007 6 Volts Line to Line Avg Average Line to Line Voltage

40008 7 Volts Line to Neutral Avg Average Line to Neutral Voltage

40009 8 Amps System Avg Average current of all phases

40010 9 kW L1 Individual Phase True Powers (kW, 3 values)

Offset ViewPoint Name Description

40011 10 kW L2 "

40012 11 kW L3 "

40013 12 Apparent PF L1 Individual Phase Apparent Power Factors (PF, 3 values)

40014 13 Apparent PF L2 "

40015 14 Apparent PF L3 "

40016 15 Volts L1 to L2 Individual Phase to Phase Voltages (Volts, Delta, 3 values)

40017 16 Volts L2 to L3 "

40018 17 Volts L1 to L3 "

40019 18 Volts L1 to Neutral Individual Phase to Neutral Voltages (Volts, Wye, 3 values)

40020 19 Volts L2 to Neutral "

40021 20 Volts L3 to Neutral "

40022 21 Amps L1 Individual Phase Currents (Amps, 3 values)

89

Find Quality Products Online at: [e-mail]

www.GlobalTestSupply.com

Modbus

System Minimum Demand (kW, resettable), It displays the default

Register

40023 22 Amps L2 "

40024 23 Amps L3 "

Offset ViewPoint Name Description

40025 24 kW System Avg

40026 25 kW Demand System Min

40027 26 kW Demand System Max System Max Demand (kW, resettable). Behaves as 40026.

Equals KWH_SYSTEM_L&M ÷ (TimeSinceReset_L&M seconds
/3600 seconds/Hr) (resettable)

value after a CAM until 1 demand window elapses. After a power
cycle or CPU reset the value is not reset but it does not update
again until 1 demand window elapses.

Table C-2: ViewPoint Register Descriptions

VERIS MULTIPLIERS

Address Units ≤ 100A 101 – 400A 401 – 800A 801 – 1600A

40001 kWH LSB 7.8125exp-3 0.03125 0.0625 0.125 0.25

40002 kWH MSB 512 2048 4096 8192 16384

40003 kW 0.004 0.016 0.032 0.064 0.128

40004 kVAR 0.004 0.016 0.032 0.064 0.128

1601 – 32,000A

40005 kVA 0.004 0.016 0.032 0.064 0.128

40006 aPF 3.0518exp-5 3.0518exp-5 3.0518exp-5 3.0518exp-5 3.0518exp-5

40007 VOLTS L-L 0.03125 0.03125 0.03125 0.03125 0.03125

40008 VOLTS L-L 0.015625 0.015625 0.015625 0.015625 0.015625

40009 AMPS 3.9063exp-3 0.015625 0.03125 0.0625 0.125

40010 kW L1 0.001 0.004 0.008 0.016 0.032

40011 kW L2 0.001 0.004 0.008 0.016 0.032

40012 kW L3 0.001 0.004 0.008 0.016 0.032

40013 aPF L1 3.0518exp-5 3.0518exp-5 3.0518exp-5 3.0518exp-5 3.0518exp-5

90

Find Quality Products Online at: [e-mail]

www.GlobalTestSupply.com

Address Units ≤ 100A 101 – 400A 401 – 800A 801 – 1600A

40014 aPF L2 3.0518exp-5 3.0518exp-5 3.0518exp-5 3.0518exp-5 3.0518exp-5

40015 aPF L3 3.0518exp-5 3.0518exp-5 3.0518exp-5 3.0518exp-5 3.0518exp-5

40016 VOLTS L1-L2 0.03125 0.03125 0.03125 0.03125 0.03125

40017 VOLTS L2-L3 0.03125 0.03125 0.03125 0.03125 0.03125

40018 VOLTS L3-L1 0.03125 0.03125 0.03125 0.03125 0.03125

40019 VOLTS L1-N 0.015625 0.015625 0.015625 0.015625 0.015625

40020 VOLTS L2- N 0.015625 0.015625 0.015625 0.015625 0.015625

40021 VOLTS L3- N 0.015625 0.015625 0.015625 0.015625 0.015625

40022 AMPS L1 3.9063exp-3 0.015625 0.03125 0.0625 0.125

40023 AMPS L2 3.9063exp-3 0.015625 0.03125 0.0625 0.125

40024 AMPS L3 3.9063exp-3 0.015625 0.03125 0.0625 0.125

1601 – 32,000A

40025 kW 0.004 0.016 0.032 0.064 0.128

40026 kW 0.004 0.016 0.032 0.064 0.128

40027 kW 0.004 0.016 0.032 0.064 0.128

Table C-3: Veris Multipliers for Integer Registers 40001-40027

Per the Veris implementation, to obtain true engineering units, the values returned from the registers in
Table C-2 must be multiplied by the scaling values listed in Table C-3.

For example, if the PowerScout has 100A CTs connected to it, the system reactive power (kVAR) is
calculated by:

 Read register 40004
 Multiply the value returned from register 40004 by 0.004

91

Find Quality Products Online at: [e-mail]

www.GlobalTestSupply.com

VERIS MODBUS FLOATING POINT REGISTERS

Modbus
Register

40257 256 VERIS Float kWh System MSW System Net True Energy (kWh, Resettable)

40258 257 VERIS Float kWh System LSW System Net True Energy (kWh, Resettable)

40261 260 VERIS Float kW System MSW System Total True Power MSW

40262 261 VERIS Float kW System LSW System Total True Power LSW

40263 262 VERIS Float kVAR System MSW System Total Reactive Power MSW

40264 263 VERIS Float kVAR System LSW System Total Reactive Power LSW

40265 264 VERIS Float kVA System MSW System Total Apparent Power MSW

40266 265 VERIS Float kVA System LSW System Total Apparent Power LSW

40267 266 VERIS Float PF System MSW System Total Power Factor MSW

40268 267 VERIS Float PF System LSW System Total Power Factor LSW

Offset ViewPoint Name Description

40269 268 VERIS Float Volts Line to Line Avg MSW Voltage Line to Line Average MSW

40270 269 VERIS Float Volts Line to Line Avg LSW Voltage Line to Line Average LSW

40271 270

40272 271 VERIS Float Volts Line to Neutral Avg LSW Voltage Line to Neutral Average LSW

40273 272 VERIS Float Amps System Avg MSW Total Current in all Phases MSW

40274 273 VERIS Float Amps System Avg LSW Total Current in all Phases LSW

40275 274 VERIS Float kW L1 MSW Individual Phase True Power L1 MSW

40276 275 VERIS Float kW L1 LSW Individual Phase True Power L1 LSW

40277 276 VERIS Float kW L2 MSW Individual Phase True Power L2 MSW

40278 277 VERIS Float kW L2 LSW Individual Phase True Power L2 LSW

40279 278 VERIS Float kW L3 MSW Individual Phase True Power L3 MSW

VERIS Float Volts Line to Neutral Avg
MSW

Voltage Line to Neutral Average MSW

92

Find Quality Products Online at: [e-mail]

www.GlobalTestSupply.com

Modbus
Register

40280 279 VERIS Float kW L3 LSW Individual Phase True Power L3 LSW

40281 280 VERIS Float Apparent PF L1 MSW Individual Phase Apparent Power Factor L1 MSW

40282 281 VERIS Float Apparent PF L1 LSW Individual Phase Apparent Power Factor L1 LSW

40283 282 VERIS Float Apparent PF L2 MSW Individual Phase Apparent Power Factor L2 MSW

40284 283 VERIS Float Apparent PF L2 LSW Individual Phase Apparent Power Factor L2 LSW

40285 284 VERIS Float Apparent PF L3 MSW Individual Phase Apparent Power Factor L3 MSW

40286 285 VERIS Float Apparent PF L3 LSW Individual Phase Apparent Power Factor L3 LSW

40287 286 VERIS Float Volts L1 to L2 MSW Phase to Phase Voltage L1 to L2 MSW

40288 287 VERIS Float Volts L1 to L2 LSW Phase to Phase Voltage L1 to L2 LSW

40289 288 VERIS Float Volts L2 to L3 MSW Phase to Phase Voltage L2 to L3 MSW

Offset ViewPoint Name Description

40290 289 VERIS Float Volts L2 to L3 LSW Phase to Phase Voltage L2 to L3 LSW

40291 290 VERIS Float Volts L1 to L3 MSW Phase to Phase Voltage L1 to L3 MSW

40292 291 VERIS Float Volts L1 to L3 LSW Phase to Phase Voltage L1 to L3 LSW

40293 292 VERIS Float Volts L1 to Neutral MSW Phase to Neutral Voltage L1 to N MSW

40294 293 VERIS Float Volts L1 to Neutral LSW Phase to Neutral Voltage L1 to N LSW

40295 294 VERIS Float Volts L2 to Neutral MSW Phase to Neutral Voltage L2 to N MSW

40296 295 VERIS Float Volts L2 to Neutral LSW Phase to Neutral Voltage L2 to N LSW

40297 296 VERIS Float Volts L3 to Neutral MSW Phase to Neutral Voltage L3 to N MSW

40298 297 VERIS Float Volts L3 to Neutral LSW Phase to Neutral Voltage L3 to N LSW

40299 298 VERIS Float Amps L1 MSW Phase Current L1 MSW

40300 299 VERIS Float Amps L1 LSW Phase Current L1 LSW

40301 300 VERIS Float Amps L2 MSW Phase Current L2 MSW

40302 301 VERIS Float Amps L2 LSW Phase Current L2 LSW

93

Find Quality Products Online at: [e-mail]

www.GlobalTestSupply.com

Modbus
Register

40303 302 VERIS Float Amps L3 MSW Phase Current L3 MSW

40304 303 VERIS Float Amps L3 LSW Phase Current L3 LSW

40305 304 VERIS Float kW System Avg MSW System Average Power MSW

40306 305 VERIS Float kW System Avg LSW System Average Power LSW

Offset ViewPoint Name Description

40307 306

40308 307

40309 308

40310 309

VERIS Float Demand System Minimum
MSW

VERIS Float Demand System Minimum
LSW

VERIS Float Demand System Maximum
MSW

VERIS Float Demand System Maximum
LSW

Table C-4: VERIS Modbus Floating Point Registers

System Minimum Demand MSW

System Minimum Demand LSW

System Maximum Demand MSW

System Maximum Demand LSW

94

Find Quality Products Online at: [e-mail]

www.GlobalTestSupply.com

Appendix D—Conversion Table

DECIMAL TO HEXADECIMAL CONVERSION TABLE

Some equipment use decimal Modbus addressing. The table below is useful for converting decimal
addressing to hexadecimal addressing.

Decimal Hex Decimal Hex Decimal Hex Decimal Hex Decimal Hex Decimal Hex

1 01 44 2C 87 57 130 82 173 AD 216 D8

2 02 45 2D 88 58 131 83 174 AE 217 D9

3 03 46 2E 89 59 132 84 175 AF 218 DA

4 04 47 2F 90 5A 133 85 176 B0 219 DB

5 05 48 30 91 5B 134 86 177 B1 220 DC

6 06 49 31 92 5C 135 87 178 B2 221 DD

7 07 50 32 93 5D 136 88 179 B3 222 DE

8 08 51 33 94 5E 137 89 180 B4 223 DF

9 09 52 34 95 5F 138 8A 181 B5 224 E0

10 0A 53 35 96 60 139 8B 182 B6 225 E1

11 0B 54 36 97 61 140 8C 183 B7 226 E2

12 0C 55 37 98 62 141 8D 184 B8 227 E3

13 0D 56 38 99 63 142 8E 185 B9 228 E4

14 0E 57 39 100 64 143 8F 186 BA 229 E5

15 0F 58 3A 101 65 144 90 187 BB 230 E6

16 10 59 3B 102 66 145 91 188 BC 231 E7

17 11 60 3C 103 67 146 92 189 BD 232 E8

18 12 61 3D 104 68 147 93 190 BE 233 E9

19 13 62 3E 105 69 148 94 191 BF 234 EA

20 14 63 3F 106 6A 149 95 192 C0 235 EB

21 15 64 40 107 6B 150 96 193 C1 236 EC

22 16 65 41 108 6C 151 97 194 C2 237 ED

23 17 66 42 109 6D 152 98 195 C3 238 EE

24 18 67 43 110 6E 153 99 196 C4 239 EF

25 19 68 44 111 6F 154 9A 197 C5 240 F0

26 1A 69 45 112 70 155 9B 198 C6 241 F1

27 1B 70 46 113 71 156 9C 199 C7 242 F2

28 1C 71 47 114 72 157 9D 200 C8 243 F3

29 1D 72 48 115 73 158 9E 201 C9 244 F4

95

Find Quality Products Online at: [e-mail]

www.GlobalTestSupply.com

Decimal Hex Decimal Hex Decimal Hex Decimal Hex Decimal Hex Decimal Hex

30 1E 73 49 116 74 159 9F 202 CA 245 F5

31 1F 74 4A 117 75 160 A0 203 CB 246 F6

32 20 75 4B 118 76 161 A1 204 CC 247 F7

33 21 76 4C 119 77 162 A2 205 CD 248 F8

34 22 77 4D 120 78 163 A3 206 CE 249 F9

35 23 78 4E 121 79 164 A4 207 CF 250 FA

36 24 79 4F 122 7A 165 A5 208 D0 251 FB

37 25 80 50 123 7B 166 A6 209 D1 252 FC

38 26 81 51 124 7C 167 A7 210 D2 253 FD

39 27 82 52 125 7D 168 A8 211 D3 254 FE

40 28 83 53 126 7E 169 A9 212 D4 255 ---

41 29 84 54 127 7F 170 AA 213 D5

42 2A 85 55 128 80 171 AB 214 D6

43 2B 86 56 129 81 172 AC 215 D7

Table D-1: Decimal to Hexadecimal Conversion Table

96

Find Quality Products Online at: [e-mail]

www.GlobalTestSupply.com

Appendix E—Troubleshooting

TROUBLESHOOTING COMMUNICATION ISSUES

When the baud rate on the ViewPoint Communications screen and the PowerScout do not match,
communication fails and a Communication Error message displays in the Status field:

“Unable to establish connection with meter, please check settings and try again.”

The following headings provide possible solutions for communication errors. You can connect via USB or
to get the RS-485 back to a known state.

Baud Rate Communications Error (RS-485 only)

To correct a baud rate communications error, use the following steps:

1) In ViewPoint, set the Modbus Base Address Switches field to 00.

2) On the PowerScout, set the address switches to 00.

3) Power up the meter. With both settings at 00, ViewPoint and the PowerScout will communicate at a

9600 baud rate regardless of a baud rate mismatch. Communications is established.

4) Next, select the desired baud rate in ViewPoint from the Baud Rate drop-down list. This

synchronizes the baud rates between ViewPoint and the PowerScout.

5) Click Connect in ViewPoint to reconfirm communications.

Port Error

If the PC COM Port drop-down list does not contain a RS-485 port, the RS-485 adapter driver is not
installed or the device is not connected to the computer’s USB port. Check that the adapter is connected
to a live USB port or move the USB cable to another USB port.

Firmware Update Fails

When the firmware update fails, select a slower baud rate and retry the update.

Find Quality Products Online at: [e-mail]

www.GlobalTestSupply.com

97

Other Communication Failures (RS-485 only)

The following items can also cause a communication failure.

 Check for wiring and cabling issues with the RS-485 adapter. Check for polarity, frayed wires,

and/or pinched insulation.

 Verify that the dip switches on the back of the USB to RS-485 adapter are set to the following:

 Reboot the computer. Click Connect on the Communications tab to reestablish communications.

Find Quality Products Online at: [e-mail]

www.GlobalTestSupply.com

98

FREQUENTLY ASKED QUESTIONS

What is the maximum distance for BACnet MS/TP or Modbus (RS-485) communication?

BACnet MS/TP or Modbus (RS-485) can reach a distance up to 1200 meters (4000’) with data rates at
100 kbps.

One (or more) of the PhaseChek

Any number of red lights indicates the PowerScout meter is wired incorrectly. Review the table in
PhaseChek in Section III of this manual for a description of the indicator lights.

How is the PowerScout meter powered?

All PowerScout™ instruments are line-powered. An internal power supply attached between L1 and L2
provides power to the unit as does a USB.

Can the PowerScout be used to monitor single-phase loads?

The PowerScout meter can be used to monitor single-phase loads. Refer to Section II or III for detailed
setup information.

How many PowerScout instruments can be connected together?

Up to 127 PowerScout 24 meters can be connected together on a BACnet MS/TP network.
Up to 30 PowerScout 24 meters can be connected together on a Modbus RTU network.

How is hexadecimal (HEX) to decimal converted?

Use the Decimal to Hexadecimal conversion table in Appendix E of this manual.

What is true RMS?

RMS stands for "Root-Mean-Square." True RMS is the power from AC voltage/current that will produce
the equivalent amount of heat in a resistor as a DC voltage/current, whether sinusoidal or not. For
example, if a resistive heating element is rated at 15 kW of heat at 240VAC RMS, then the heat would be
the same if we applied 240V of DC instead of AC. A meter without true RMS will incorrectly read
distorted waveforms. All DENT Instruments meters measure true RMS.

How accurate are the PowerScout meters?

The PowerScout 24 meter accuracy is 1%.

What is the lead length for RōCoil CTs?

The maximum lead length for the RōCoils is 30 meters (100’).
Can a three-phase balanced load be monitored with one CT?
This is not the best way to measure a three-phase load as it ignores imbalances in voltage and power

factor. However, if desired there is an Amp Multiplier Modbus register (44605) that can be set for
three (3), which will multiply the current by three and therefore amps, watts, VA, VARs will be 3X
greater.

How can I switch the PowerScout from BACnet to Modbus mode?

Using a PC running ViewPoint™ (or an RTU that can write to BACnet objects), write to object 10190 the
value 375 (to change to Modbus).

How can I switch the PowerScout from Modbus to BACnet mode?

Using a PC running ViewPoint™ (or an RTU that can write to Modbus registers), write to register 44612
the value 1833 (to change to BACnet).

™

LEDs is red. What does this mean?

Find Quality Products Online at: [e-mail]

www.GlobalTestSupply.com

99

How can I fix BACnet network timing errors/slowness?

The maximum number of the MSTP master should be set to the highest MAC address present in the
network. Max Master is a setting on the Communications tab of the ViewPoint™ software.

What is the purpose of setting a scalar value?

Each Modbus register is only 16 bits wide and is in integer format without any fixed number of decimal
points. Simply putting a value directly into one of these registers would limit the smallest number to 1,
and only allow for a maximum value of 65535. To handle larger numbers, or numbers with better
resolution, we use a scalar value to apply a factor in multiples of 10 to the 16 bit data register value.

How do I update the firmware in BACnet mode?

If not using a USB connection, the PowerScout meter must be in Modbus mode in order to use
ViewPoint to update the firmware (either through the software switch or the rotary switches).

Find Quality Products Online at: [e-mail]

www.GlobalTestSupply.com

100