DENT Instruments PowerScout 3, PowerScout 18 User Manual

USER’S MANUAL

™

PowerScout 3

™

PowerScout 18

™

ViewPoint

DENT Instruments | 64 NW Franklin Avenue | Bend, Oregon 97701-2906 USA

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

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2

PowerScout™

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.

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

SAFETY SUMMARY and SPECIFICATIONS

The PowerScout™ is an Over-Voltage Category III device.

CAUTION: This METER may contain life threatening voltages. QUALIFIED PERSONNEL MUST Disconnect all
high voltage wiring before USING or servicing the METER.

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 electric 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.

USE ONLY CURRENT TRANSFORMERS (CTs) SUPPLIED.
Do not use other CTs. A serious shock hazard and meter damage can occur if other CTs are used.

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

No accessories are approved for use with the PowerScout™ 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 please call

541.388.4774, or email tech support ([e-mail]), for assistance.

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PowerScout™

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.

Conforme à UL Std 61010-1
Certifié CSA Std C22.2 No. 61010-1

RÉSUMÉ DE SÉCURITÉ ET SPÉCIFICATIONS

Le PowerScout ™ est un appareil de surtension de catégorie III.

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.

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.

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.

UTILISEZ SEULEMENT TRANSFORMATEURS DE COURANT (TC) FOURNIS.
Ne pas utiliser d'autres TC. Un sérieux risque de choc et de dommages au compteur peut se produire si d'autres TC sont
utilisés.

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

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 ([e-mail]), pour obtenir de
l'aide.

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SECTION I: INTRODUCTION

Using this Manual

This manual contains information about the PowerScout™ 3, PowerScout™ 18, ViewPoint Software and the RS­422/485 to Serial Adapter. For ease of use, this manual has been divided into five sections. The list of sections
and their contents follows:

Section I Introduction
Section II The PowerScout™
Section III ViewPoint™ Software
Section IV Configuring the RS-422/485 Adapter
Section V Appendix

PowerScout Overview

The PowerScout™ watt-transducers are made for the non-revenue submetering market. Each meter is made to
monitor the voltage, current, power and energy of a single three phase system. The PowerScout™ meter uses
direct connections to each phase of the voltage, and uses current transformers (or Rogowski coils) to monitor
each phase of the current. Energy, demand, power factor, line frequency, etc. are derived from the voltage
and current inputs.

The communication interface to the unit is through an RS-422/485 serial connection that uses the Modbus
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 for data
recording and trend logging and any human interface or display.

Up to 41 PowerScout™ 18 meters (249 PowerScout™ 3 meters) may be connected to a single RTU for
monitoring and recording power usage at multiple locations within a single site.

The PowerScout™ 18 (PS18) consists of six independent three phase metering elements labeled “A” through
“F” in the drawing below. Each metering element has provision for three current transformers (CTs), one for
each phase. In this way, the PowerScout™ 18 can measure six independent three-phase loads.

The voltage reference is made on the power supply board as shown below. The single connection point for the
voltages is common to all six of the watt metering elements. Therefore, though six independent three phase
loads can be monitored by a single PowerScout™ 18 all six loads must have the same voltage source, e.g., be in
the same panel. To monitor multiple voltage sources, for example, 480/277V and 208/120V loads across a
transformer, two PowerScout™ 18’s will be needed, one for each voltage source.

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SECTION II: THE POWERSCOUT™

PowerScout Technical Specifications

Service Type Three Phase, Four Wire (WYE)
3 Voltage Channels CATIII 80-346 Volts AC Line-to-Neutral, 600V Line-to-Line
Current Channels

PS3 3 channels 0-5,000+ Amps depending on current transformer
PS18 18 channels 0-5,000+ Amps depending on current transformer
Measurement Type True RMS using high-speed digital signal processing (DSP)
Line Frequency 50/60Hz, DC
Waveform Sampling 13 kHz
Measurements 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.

Accuracy Better Than 1% (<0.5% typical) for V, A, kW, kVAR, kVA, PF
Resolution 1 Amp, 1 Volt, 1 watt, 1 VAR, 1 VA, 0.01 Power Factor Depending on scaling

setting
Indicators 24 bi-color LEDs (red and green): 4 LEDs per each watt metering
element. Each element has 1 LED to indicate communication and 3 LEDs
for correct phasing (Green when voltage and current on the on the same
phase; Red when incorrectly wired. Patent pending.)

Communication

Direct Modbus over RS-485

Modbus Framing RTU (binary)
Communication Rate 9600 baud
Data Bits 8
Parity None
Stop Bit 1

Data Formats Modbus Protocol
Power From L1 Phase to L2 Phase. PS 18: 5 Watts typ. @ 600VAC, 2.5W typ. @

80VAC; non-user replaceable .5 Amp Internal fuse protection

Mechanical

Operating Temperature -7 to + 60 oC (20 to 140 oF)
Humidity 5% to 95% non-condensing
Enclosure Optional NEMA 4 rated, ABS plastic, 94-V0 Flammability Rating
Weight 0.4 kg (11 ounces) Exclusive of CTs
Dimensions Approx. 6” X 10” (15 X 25 cm) Circuit Board Only, PowerScout 18

ViewPoint™ Minimum System Requirements
Operating System Windows® 7 (32 or 64 bit), Vista (32 or 64 bit), XP or 2000
Communications Port One USB Port or Serial Port
Hard Drive 50 MB minimum available
Processor Pentium Class 1 GHz or more recommended

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Connections To The PowerScout

The PowerScout™ has a connector for four voltage wire leads for making connections to voltage sources (L1, L2,
L3, Neutral). The PowerScout™ 18 also has connectors for up to 18 current transducers (CTs) (PowerScout™ 3
has 3 CTs). The PowerScout™ also has a three wire connector for the RS-485 Modbus link.

CAUTION: THE POWERSCOUT™ SHOULD ONLY BE WIRED BY QUALIFIED PERSONNEL. HAZARDOUS VOLTAGES EXIST.

ATTENTION: LE POWERSCOUT ™ NE DOIT ÊTRE BRANCHÉ QUE PAR UN PERSONNEL QUALIFIÉ. TENSIONS DANGEREUSES

SONT PRÉSENTES.

DANGER! THE UNENCLOSED POWERSCOUT BOARD REQUIRES EXTRA CAUTION WHEN CONNECTING. LIFE THREATENING
VOLTAGES EXCEEDING 600 VOLTS MAY EXIST ON THE BOARD. THE RISK OF SERIOUS INJURY OR DEATH SHOULD NOT BE
UNDERESTIMATED.

DANGER! LA PLAQUETTE DE CIRCUITS IMPRIMÉS SANS COUVERCLE EXIGE UN REDOUBLEMENT DE PRUDENCE QUAND ON
FAIT LA CONNEXION. LES TENSIONS DÉPASSANT 600 VOLTS PEUVENT EXISTER SUR LA PLAQUETTE ET PEUVENT METTRE
LA VIE EN DANGER. LE RISQUE DE BLESSURES GRAVES OU DE MORT NE DOIT PAS ÊTRE SOUS-ESTIMÉ.

Connecting the PowerScout™ 3

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PowerScout™ 18
Layout and Watt-Transducer Naming Convention

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WARNING! REMOVE THE METER FROM ALL SOURCES OF VOLTAGE BEFORE MOUNTING!

Mounting the PowerScout 3

The PowerScout™ 3 must be installed in an approved electrical panel or enclosure using proper installation
practices according to the local electrical codes. For convenience of mounting, two mounting tabs are
provided on the PowerScout™ 3.

Mounting the PowerScout 18

Open the top cover of the case to expose four (.275”/ 7mm) mounting holes, one at each corner. Using the

appropriate screw for the material that the PowerScout™ will be mounted to, screw the case to the mounting
surface. The location you mount the case must be able to support at least 3 lbs.

Wiring the Modbus

For the PowerScout™ 18 only, open the top cover of the case (if so equipped) by turning the two corner screws
counter-clockwise until loose. Set two rotary switches (on the circuit board near to the Modbus/RS-485
connector) to the Modbus address desired. These switches (on both the PowerScout™ 3 and PowerScout™ 18)

set the address for metering element “A.” Metering elements “B” through “F” will always have a Modbus

address that is one higher than the element before. For example, if the rotary address switches are set to 01

then metering element “A” register values will be accessed at Modbus address 01, metering element “B”
registers will be accessed at Modbus address 02, “C” at address 03, and so on.

On the PowerScout™ 3 and PowerScout™ 18, the rotary switches are 16 position hexadecimal switches. The
default factory setting is hex 01 (Modbus Address Decimal 01). 254 different Modbus addresses are allowed
from 01 (hex 01) to decimal 254 (hex FE). Addresses hex 00 (Decimal 00) and hex FB through hex FF (Decimal
251 through 255) are reserved for factory use. (See Appendix A for a decimal to hex conversion, if your
equipment is decimal based.) Each PowerScout™ 18 uses 6 Modbus address.

Next connect the Modbus wires to the connector in the meter. Use Diagram below.

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Wiring of the CT’s:

For each of the six 3-phase metering elements A through F, connect the current transformers as shown in the
diagram below.

Note: The CTs are insensitive to orientation and may be placed on the wires to be monitored with the CT faces
in either direction. The CTs are connected on the PowerScout™ board in positions labeled L1, L2, L3 and must
be placed on the phase wires of the load to be monitored corresponding to the phase of the voltage leads. i.e.,
The CT labeled L1 must be placed on L1 phase voltage wire, the L2 CT must be on the L2 voltage, and the L3 CT
on the L3 voltage.

Wiring of the Voltage Input:

Last, connect 14 AWG THHN (or equivalent) wires to the PowerScout™ CAT III voltage terminals as shown in the
diagram above after a building installed dedicated circuit disconnect breaker while being as close as possible to
it (following the local electrical codes). Mark the breaker as the disconnect for the PowerScout™. Note that
the PowerScout™ has an internal non-user replaceable .5 Amp Internal fuse protection.

Warning: DO NOT EXCEED 600Vac PHASE TO PHASE CAT III. When complete, close the enclosure cover, if
equipped.

Attention: NE PAS DÉPASSER UNE PHASE À 600VAC CAT III. Une fois terminé, fermer le covercle, s’il y en a un.

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Powering the PowerScout™ 3 and 18

The PowerScout™ instruments are self-powered from the L1 and L2 lines. When 80 – 340VAC or DC are put
across the L1 and L2 wires the three phasing LEDs will begin to flash in sequence. If the LEDs are all green then
the system power factor is greater than 0.55 and the CTs are properly placed on the corresponding voltage
phases.

If two or three of the LEDs are red then there is a phasing connection error. If two LEDs are red and one is
green. Switch the positions of the two CTs that are red. That should make all three LEDs green.

Using PhaseChek™

PhaseChek™ (patent pending) is a unique feature of the PowerScout™ and greatly simplifies installation and, at
a glance, verifies correct CT orientation during installation. The PowerScout automatically adjusts for CT
orientation—greatly reducing set-up time and all but eliminating installation errors.

If two or three of the PhaseChek™ LEDs are red, then there is a phasing connection error. If two LEDs are red
and one is green, switch the positions of the two CTs that are red. That should make all three LEDs green.

If all three PhaseChek™ LEDs are red, probably the CTs are connected in the correct order but off by one
position. For example, the L1 CT is on the L2 phase, the L2 CT is on the L3 phase and the L3 CT is on the L1
phase. Rotate the CTs until all of the LEDs are green thus ensuring a correct metering condition.

You can also verify that your PowerScout™ is set up correctly by using ViewPoint™. The ViewPoint™ program is
designed to let you easily configure the PowerScout™ for the current transformers connected to it and to check
readings. More information about ViewPoint™ can be found in Section III of this manual.

Note: 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 the load to be monitored is a lightly loaded electric motor, for example.

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PowerScout Modbus Commands

Read Holding Register (Command #03; each item below is 8 bits) is as follows:

Meter Address

Command (03h)

FIRST MSB

FIRST LSB

Number to read MSB

Number to Read LSB

CRC LSB

CRC MSB

Meter Address = which meter to read, FIRST = First point to read, Number to read = Number of points to read

Write (Preset) Single Register (Command #06; each item below is 8 bits) is as follows:

Meter Address

Command (06h)

REG MSB

LEG LSB

DATA MSB

DATA LSB

CRC LSB

CRC MSB

Meter Address = which meter to write, DATA = value to store

Write Return Slave ID Command (Command #17; each item below is 8 bits) is as follows:

Meter Address

Command 17h

CRC LSB

CRC MSB

Meter Address = which meter to respond

The Modbus commands that are used by the PowerScout meter are the Read Holding Register command, the
Write (Preset) Single Register command and the Return Slave ID command. The Read Holding Register
command is the most often used, as this is the command that retrieves the actual voltage, power and energy
values from the meter. Typically, the RTU continually reads the values from the registers containing the
desired information. The following is a quick-reference to three common Modbus commands:

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PowerScout Modbus Register Assignments

Register

Offset

Modbus

Detailed Description

kWh System LSW

4000

44001

System Total Net True Energy LSW (kWh)

kWh System MSW

4001

44002

System Total Net True Energy MSW (kWh)

kW System

4002

44003

System Total True Power (kW)

kW Demand System Max

4003

44004

Max Average power window (KW)

kW Demand System Now

4004

44005

Average power (KW) (most recent window)

kW System Max

4005

44006

System Maximum Instantaneous kW
(Highest 500mS kW)

kW System Min

4006

44007

System Minimum Instantaneous kW
(Lowest 500mS kW)

kVARh System LSW

4007

44008

System Total Net Reactive Energy LSW (kVARh)

kVARh System MSW

4008

44009

System Total Net Reactive Energy MSW (kVARh)

kVAR System

4009

44010

System Total Reactive Power (kVAR)

kVAh System LSW

4010

44011

System Total Apparent Energy LSW (kVAh)

kVAh System MSW

4011

44012

System Total Apparent Energy MSW (kVAh)

kVA System

4012

44013

System Total Apparent Power (kVA)

Displacement PF System

4013

44014

System Total Power Factor (PF)

Apparent PF System

4014

44015

System Total Power Factor (PF)

Amps System Avg

4015

44016

Total current in all phases.

Volts Line to Line Avg

4016

44017

Voltage Line to line (Volts) Average.

Volts Line to Neutral Avg

4017

44018

Voltage Line to neutral (volts) Average.

Volts L1 to L2

4018

44019

Individual Phase to Phase Voltages

Volts L2 to L3

4019

44020

Volts L1 to L3

4020

44021

Line Frequency

4021

44022

Line Frequency (Hz) (PS18 x 100, PS3 x 10)

kWh L1 LSW

4022

44023

Individual Phase True Energy LSW (kWh)

kWh L1 MSW

4023

44024

Individual Phase True Energy MSW (kWh)

kWh L2 LSW

4024

44025

kWh L2 MSW

4025

44026

kWh L3 LSW

4026

44027

kWh L3 MSW

4027

44028

kW L1

4028

44029

Individual Phase True Powers (kW)

kW L2

4029

44030

kW L3

4030

44031

kVARh L1 LSW

4031

44032

Individual Phase Reactive Energy LSW (kVARh)

kVARh L1 MSW

4032

44033

Individual Phase Reactive Energy MSW (kVARh)

kVARh L2 LSW

4033

44034

kVARh L2 MSW

4034

44035

kVARh L3 LSW

4035

44036

kVARh L3 MSW

4036

44037

kVAR L1

4037

44038

Individual Phase Reactive Powers (kVAR)

kVAR L2

4038

44039

kVAR L3

4039

44040

Table 1 is a listing of all of the data registers available on the PowerScout™. Note that following the Modbus
protocol, the actual register address requested is offset from the base Modbus register by 40001.

Table 1. Modbus Register Assignments. Offset refers to a base of 40001

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Register (Con’t)

Offset

Modbus

Detailed Description

kVAh L1 LSW

4040

44041

Individual Phase Apparent Energy LSW (kVAh)

kVAh L1 MSW

4041

44042

Individual Phase Apparent Energy MSW (kVAh)

kVAh L2 LSW

4042

44043

kVAh L2 MSW

4043

44044

kVAh L3 LSW

4044

44045

kVAh L3 MSW

4045

44046

kVA L1

4046

44047

Individual Phase Apparent Powers (kVA)

kVA L2

4047

44048

kVA L3

4048

44049

Displacement PF L1

4049

44050

Individual Phase displacement Power Factor (PF)

Displacement PF L2

4050

44051

Displacement PF L3

4051

44052

Apparent PF L1

4052

44053

Individual Phase apparent Power Factors (PF)

Apparent PF L2

4053

44054

Apparent PF L3

4054

44055

Amps L1

4055

44056

Individual Phase Currents (A)

Amps L2

4056

44057

Amps L3

4057

44058

Volts L1 to Neutral

4058

44059

Individual Phase to Neutral Voltages (V)

Volts L2 to Neutral

4059

44060

Volts L3 to Neutral

4060

44061

Time Since Reset LSW

4061

44062

Seconds since KWH register was reset. LSW

Time Since Reset HSW

4062

44063

Seconds since KWH register was reset. MSW

Volts Scalar (not implemented)

4064

44065

For use with step-down transformer

Amps Scalar (not implemented)

4065

44066

For use with primary CTs

Firmware Major Revision

4068

44069

Firmware Minor Revision

4069

44070

CT Value (x2)

4300

44301

In Amps (CT value x2)

Data Scalar

4301

44302

See Table 2

Demand Window Size

4302

44303

In Minutes (1 to 60); Default = 15 minutes

Register

Offset

Modbus

Detailed Description

Synchronize Register

128

40129

The multiple meters synchronization register

Register

Offset

Modbus

Detailed Description

Model Number 1st 2 bytes

4200

44201

Model Name 10 bytes (ASCII Alpha-Numeric)

Model 2

4201

44202

“

Model 3

4202

44203

“

Model 4

4203

44204

“

Model Number last 2 bytes

4204

44205

“

Serial Number 1st 2 bytes

4205

44206

Serial Number 10 bytes (ASCII Alpha-Numeric)

Serial 2

4206

44207

“

Serial 3

4207

44208

“

Serial 4

4208

44209

“

Serial Number last 2 bytes

4209

44210

“

Other, Misc. Registers Settable

Other, Misc. Registers Not Settable

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Interpreting the PowerScout Registers – Data Scaling

Register
44302

kW/kWh Demand

kVAR/kVARh

kVA/kVAh

Power Factor

Amps

Volts
0

.00001

.00001

.00001

.01

0.01 A

0.1V

1

.001

.001

.001

.01

0.1

0.1 2 .01

.01

.01

.01

0.1

0.1 3 .1

.1

.1

.01

0.1

0.1 4 1 1 1

.01

1 A

1 V

5

10

10

10

.01 1 1

≥6

100

100

100

.01 1 1

The use of Modbus protocols limits the data registers to a maximum of 2 bytes (16 bits) or a maximum decimal
value of 65535. Modbus also requires that the values be integer values. To overcome these limitations some
measured (and stored) values have to be scaled to fit into the Modbus registers. To convert the raw data read
from the Modbus registers a scalar must be multiplied by the raw value. For this meter the scaling is:

Table 2: Data Scalar and Resolution of Modbus Values for Registers 44001 thru 44061

For example, if the scalar value in register 44302 is set to 3 and the total true power for the system (kW) is
read from Modbus register 44003 (Offset 4002) and a value of 3465 is returned, the true system kW is
3465 X 0.1 = 346.5 kW.

A raw value of Apparent Power Factor from register 44015 might be 87. This would correspond to an actual
power factor of 87 X 0.01 = .87 PF

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 Table 1 that shows two registers (identified by the terms
“MSW” and “LSW”) is such a wide-ranging parameter.

To correctly interpret the values found in these registers note that the number in the MSW (Most Significant
Word) register should be multiplied first by 65536. This number should be added the value found in the
corresponding LSW (Least Significant Word) register and then multiplied by the appropriate value from Table

2.

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 44064 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 Table 2 Scalar of 0.1 → 856981 X 0.1 = 85698.1 kWh

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Resetting Modbus Registers

Most of the PowerScout™ registers are real-time values such as instantaneous watts or power factor. However,
some registers are accumulated values such as kWh, kVARh, kVAh and various Peak Demand (kW) values. To
reset the accumulating registers use the standard Modbus protocol to write a “0” to register 40001.

Modbus Implementation & Further Information

More information about Modbus can be found from Modicon in the "Modicon Modbus Protocol Reference
Guide", PI-MBUS-300, Rev J. The entire document may be found at:
http://www.modicon.com/techpubs/toc7.html

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SECTION III: ViewPoint™ Software

The ViewPoint™ program is designed to let you easily configure the PowerScout™ for the current transformers
connected to it and to check readings.

Installing the Software

An RS-485 to USB adapter or RS-422/485 to Serial adapter is required to connect the computer to the
PowerScout™. Remove power from the PowerScout™ before installing the adapter. Refer to Section IV of this
manual for safety precautions and further information regarding the RS-422/485 to Serial Adapter. After the
adapter is installed apply power to the meter and proceed with installing the ViewPoint™ program.

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.

Step 1

If installing ViewPoint™ from the CD, insert the ViewPoint CD into the CD-ROM drive. The installer should start
automatically. If it does not, browse to the CD and run the ViewPointSetup.exe program. If you have
downloaded ViewPointSetup.exe, browse to its location and run it.

Step 2

After installing successfully, the ViewPoint™
program will run and will display a
Communications screen with two values to
fill in.

The Modbus Base Address is a hexadecimal
value that should match the switches on
the PowerScout™. The field is pre­configured with the default value of 01,
which is how the switches are set at the
factory. If that is your current
configuration, then there's nothing more to
do regarding the Modbus Base Address.

The PC COM Port lets you choose which
serial port the computer should use to
communicate with the PowerScout™ (see
diagram at right). Select RS-485 from the
drop-down list.

With both the Modbus Base Address and
PC COM Port values entered correctly, click the Connect button to establish a connection to the PowerScout™
meter. The program will communicate with the meter and display its version information. If it could not
connect, you can change the settings or the hardware connection and try again until it works.

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Step 3

Once you're communicating with the PowerScout™, you can use the other tabs in the ViewPoint™ program to
configure the PowerScout™. See the next section for a description of each tab.

Using the ViewPoint Program
The program has four tabs to bring up screens for a particular task. Click a tab to bring up the desired screen.
Below is a brief description of each tab:

Communications

The Communications tab lets you specify the PC COM Port and the Modbus Base Address to let the program
communicate with the PowerScout™.

Real Time Values

The Real Time Values tab displays the current readings to allow you to verify that the system is configured
properly. Select one of the six elements (on a PowerScout™ 18) using the radio buttons and click Update to get
the values for that element.

Set CT Values

The Set CT Values tab let you change the type of current transformers connected.

Read & Write Registers

The Read & Write Registers tab allows you to view or change the value of any PowerScout™ registers. See the
User's Manual for a list of the registers and their description. This tab is provided for diagnostic and special
configuration purposes, and is not required for a basic setup. Select one of the six elements (on a PowerScout™

18) using the radio buttons to choose which element to read or write to.

Help Menu

The ViewPoint™ program has a built-in Help file which you can bring up by clicking the Help button in the upper
right hand corner of the window. This will open your web browser and display help for the tab currently
selected in the program.

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SECTION IV: RS-422/485 Adapter

Instructions for Installing the USB to RS-485 Adapter

1. Insert the B&B Electronics CD that came with the USB to RS-422/485 adapter into your PC.

2. Plug the USB to RS-422/485 adapter into a PC USB port.

3. The Found New Hardware Wizard will appear. The first screen will ask “Can Windows connect to

Windows Update to search for software?”

4. Click “No, not this time,” then Next>

5. Click “Install from a list or specific location (Advanced),” Next>

6. In the New Hardware Wizard select “Search for the best drivers in these locations” and “Search

removable media (floppy, CD-ROM…)”.

7. Click “NEXT>”

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8. Ignore the Windows message about logo compatibility and click Continue anyway, and then Finish

when the installation is complete.

9. The New Hardware Wizard will come up a second time in order to install the serial port. Repeat steps

4-8.

10. When the “Completing the Found New Hardware Wizard” is displayed, remove the CD from your

computer and store.

11. Verify that the dip switches on the back of the USB to RS-422/485 adapter are set to: RS-422/485, Echo

Off, 2 Wire, 2 Wire

12. The adapter is now ready for use.

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SECTION V: APPENDIX

Decimal

Hex

Decimal

Hex

Decimal

Hex

Decimal

Hex

Decimal

Hex

Decimal

Hex 1 ---

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

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

APPENDIX A: HEXIDECIMAL to DECIMAL CONVERSION

Table A1: Decimal Value is the Modbus Meter Address. Hex Value Corresponds to the Two Rotary Switch
Settings. (Left switch is high digit, Right switch is low digit)

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APPENDIX B: VERIS H8035/H8036 EMULATION

Modbus Addr.

Offset

Description

Units

Comments

40001

System Total True Energy, LSW

kWh

Multiplier Required,
Resetable

40002

System Total True Energy, MSW

kWh

Multiplier Required,
Resetable

40003

System Total True Power

kW

Multiplier Required

40004

System Total Reactive Power

kVAR

Multiplier Required

40005

System Total Apparent Power

kVA

Multiplier Required

40006

System Total Apparent Power Factor

PF

Multiplier Required

40007

Average Line to Line Voltage

Volts

Multiplier Required

40008

Average Line to Neutral Voltage

Volts

Multiplier Required

40009

Sum of Line Currents

Amps, X1

Multiplier Required

40010

L1 Phase True Power

kW

Multiplier Required

40011

L2 Phase True Power

kW

Multiplier Required

40012

L3 Phase True Power

kW

Multiplier Required

40013

L1 Phase Apparent Power Factor

aPF

Multiplier Required

40014

L2 Phase Apparent Power Factor

aPF

Multiplier Required

40015

L3 Phase Apparent Power Factor

aPF

Multiplier Required

40016

L1 – L2 Voltage

Volts

Multiplier Required

40017

L2 – L3 Voltage

Volts

Multiplier Required

40018

L3 – L1 Voltage

Volts

Multiplier Required

40019

L1 – Neutral Voltage

Volts

Multiplier Required

40020

L2 – Neutral Voltage

Volts

Multiplier Required

40021

L3 – Neutral Voltage

Volts

Multiplier Required

40022

L1 Current

Amps

Multiplier Required

40023

L2 Current

Amps

Multiplier Required

40024

L3 Current

Amps

Multiplier Required

40025

System Average Demand

kW

Multiplier Required
Variable Window,
Resetable

40026

System Minimum Inst. Demand

kW

Multiplier Required, 500mS

40027

System Maximum Inst. Demand

kW

Multiplier Required, 500mS

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™ simple. However, because the number of parameters that the Veris meters measure is less than
half of what the PowerScout™ can measure, the other Modbus registers described in Table 1 need to be used if
the additional capabilities of the PowerScout™ are desired.

Table B1: Veris Emulation Modbus Register Assignments*

*All values are 16 bit, unsigned integers. The PowerScout™ does not currently support the Veris floating point registers.
Consult DENT Instruments for availability.

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Table B2. Veris Multipliers for Integer Registers 40001 - 40027

Address

Units

≤100A

101 - 400A

401 – 800A

801 - 1600A

1601 ­32,000A

40001

KWH LSB

7.8125exp-3

0.03125

0.0625

.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

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

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

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

Per the Veris implementation, to obtain true engineering units, the values returned from the registers in Table
B1 must be multiplied by the scaling value found in Table B2. For example, if the PowerScout™ has 100A CTs
connected to it, then to get system reactive power (kVARs) multiply the value returned from reading register
40004 by 0.004.

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