DENT Instruments PowerScout 24 Manual

Operator’s Guide
PowerScout™24
Power Meter
Includes:
ViewPoint™ 4.0 Software
October 23, 2014
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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
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iii
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
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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
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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
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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 user-
supplied 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).
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Example of a COC for a PowerScout 24
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8
Meter Anatomy
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PowerScout Meter Safety Summary and Specifications
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.
PS24-D-S/PS24-D-E
PS24-N-S/PS24-N-E
These items conform to the following:
PS24 Series (except PS24Es):
Conforms to UL Std 61010-1, 2nd
Edition
Certified to CSA Std C22.2 No. 61010-
1, 2nd Edition
The PS24-N-S/PS24-N-E devices need to be installed in a user-supplied UL Listed/Recognized enclosure in order to
comply with NEC and local electrical codes.
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.
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.
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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).
FCC COMPLIANCE
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
undesired operation.
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]
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PowerScout Résumé de Sécurité et Spécifications
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.
PS24-D-S/PS24-D-E
PS24-N-S/PS24-N-E
Tous les articles sont conformes à ce
qui suit:
PS24 Série (Sauf PS24Es):
Conforme à UL Std 61010-1, 2nd
Edition
Certifié CSA Std C22.2 No. 61010-1,
2nd Edition
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.
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.
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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]
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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 24 channels 0-5,000+ Amps depending on current transducer
Maximum Current Input 200% of current transducer rating (mV CTs). Measure up to 5000 Amps with RōCoil
CTs using 333mVAC output at full current rating.
Measurement Type True RMS using high-speed digital signal processing (DSP)
Line Frequency 50/60Hz
Power From L1 Phase to L2 Phase. 80-600VAC CAT III 50/60Hz, 200mA Max. Non-user
replaceable .5 Amp internal fuse protection
Power Out Unregulated 5VDC output, 500 mA Max
Waveform Sampling 12 kHz
Parameter Update Rate 1 second
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 1% (<0.5% typical) for V, A, kW, kVAR, kVA, PF
Resolution 0.01 Amp, 0.1 Volt, 0.01 watt, 0.01 VAR, 0.01 VA, 0.01 Power Factor depending on
scalar setting
Indicators
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.
Pulse Output Open Collector, 75mA max current, 40V max open voltage
Communication
Direct User Selectable Modbus RTU or BACnet Master Slave Token Passing protocol (MS/TP)
RS-485 or Ethernet, and USB for meter setup.
Serial Meters
Max Communication
Length 1200 meters with Data Range of 100K bits/second or less
RS-485 Loading 1/8 unit
Communication Rate
(baud)
Modbus: 9600 (Default), 19200, 38400, 57600, 76800, 115200
BACnet: 9600 (Default), 19200, 38400, 76800
Data Bits 8
Parity None, Even, Odd
Stop Bit 2, 1
Data Formats
Modbus Protocol
-or-
BACnet Master Slave / Token Passing (MS/TP) protocol
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Mechanical
Operating Temperature -7 to + 60⁰C (-20 to 140⁰F)
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
Serial/Ethernet Meters
The following are UL listed:
PS24-D-S/PS24D-E
The following are UL Recognized:
PS24-N-S/ PS24-N-E
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
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15
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 software and a communication cable should be completed and
tested with a meter prior to the field installation. A USB cable can be used when configuring the meter
in this manner.
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.
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16
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.
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17
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.
DID YOU KNOW?If an RS-485 adapter is used instead of a USB, an RS-485 driver must be installed
on your computer and power applied to the PowerScout meter before the software will function
properly.
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18
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-1: RS-485 Adapter
Figure II-2: Dip switches on back of RS-485
Adapter
Figure II-3: RS-485 Connector on PS24
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19
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.
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20
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 Reserved for resetting the PowerScout to Modbus mode with 9600 baud,
8 bit, 1 stop bit and no parity.
001-127 Available (01/001 is the factory default setting).
128-254 Reserved for BACnet slave devices.
255 Reserved for network broadcast.
999 Used to configure PS24 for Modbus/BACnet
Table III-1: BACnet Hexadecimal/Decimal Address Availability
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