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DENT Instruments PowerScout 24 Operator's Manual

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Operator's Guide
™
PowerScout
24
Power Meter
Includes:
ViewPoint™ 4.0 Software
October 23, 2014
PowerMeterStore
1.877.766.5412
www.
.com
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Summary of Contents for DENT Instruments PowerScout 24

  • Page 1 Operator’s Guide ™ PowerScout Power Meter Includes: ViewPoint™ 4.0 Software October 23, 2014 PowerMeterStore 1.877.766.5412 www. .com Shop for Dent products online at:...
  • Page 2 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.

  • Page 3: Table Of Contents

    Table of Contents .......................... 6 NTRODUCTION 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 ........................
  • Page 4 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...
  • Page 5 ..........................86 PPENDICES 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 ..................

  • Page 6: Introduction

    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.
  • Page 7 Example of a COC for a PowerScout 24 PowerMeterStore 1.877.766.5412 www. .com Shop for Dent products online at:...

  • Page 8: Meter Anatomy

    Meter Anatomy PowerMeterStore 1.877.766.5412 www. .com Shop for Dent products online at:...

  • Page 9: Powerscout Meter Safety Summary And Specifications

    PowerScout Meter Safety Summary and Specifications These items conform to the following: This general safety information is to be used by both the Logger operator and servicing personnel. DENT Instruments, PS24 Series (except PS24Es): PS24-D-S/PS24-D-E Inc. assumes no liability for user’s failure Conforms to UL Std 61010-1, 2 to comply with these safety guidelines.
  • Page 10 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.

  • Page 11: 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 PS24 Série (Sauf PS24Es): PS24-D-S/PS24-D-E responsabilité pour l'utilisateur qui ne Conforme à UL Std 61010-1, 2 respecte pas les directives en matière de...
  • Page 12 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.

  • Page 13: Powerscout 24 Technical Specifications

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

  • Page 15: Prepping For Field Installation

    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.

  • Page 16: Connecting A Communication Cable

    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. RS-485 A...
  • Page 17 ? 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. Installing the RS-485 Adapter on a Computer 1) Insert the CD that came with the RS-485 adapter into your computer.
  • Page 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.
  • Page 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.
  • Page 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.

  • Page 21: Addressing An Element

    Table III-2: Modbus Hexadecimal/Decimal Address Availability DDRESSING AN LEMENT 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.”...

  • Page 22: Connecting And Communicating Via An Ethernet (Tcp/Ip) Connection

    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...
  • Page 23 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.
  • Page 24 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.

  • Page 25: Communications Leds

    Communications LEDs The PowerScout COM LEDs signal the following communication information. PS24 S ERIAL THERNET BACnet Modbus Description Steady Green Steady Green Power is applied to the meter. Flashing Green The meter is communicating. Steady Red Communications failure, or talking with BACnet while PS24 is in Modbus mode.
  • Page 26 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.

  • Page 27: Entering Wiring Information For 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 ...
  • Page 28 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 2.20° CT-SCS-0100 2.20° Split Core CT-SCM-0100 1.75° Medium CT-SCM-0200 1.50° CT-SCM-0400 1.30° CT-SCM-0600 1.30° Split Core Large CT-SCL-0600 0.00°...

  • Page 29: Selecting A Scalar

    ELECTING A CALAR : The The use of Modbus protocols limits the data registers to a maximum of two register value must bytes (16 bits) or a maximum decimal value of 65535. Modbus requires that be less than 65,535. 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.
  • Page 30 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. 3-phase Loads CT Size or Max. Current 230 volts 460 volts Scalar 1 Scalar 2 Scalar 2...

  • Page 31: Comms Setup

    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.

  • Page 32: Settings

    RS-485 S ETTINGS 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. EVICE ETTINGS Enter a new value into any field and click Send Setup to Meter to update the Device ID (meter...

  • Page 33: Establishing Communication Protocol

    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 ...
  • Page 34 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.
  • Page 35 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.

  • Page 36: Field Installation

    PowerScout meters must be installed in an approved electrical panel or enclosure using proper installation practices according to the local electrical codes. The raw board of the PowerScout 24 meter can be mounted to customer-provided standoffs or  placed into a NEMA (National Electrical Manufacturers Association) box. A NEMA-rated box is available through DENT Instruments.

  • Page 37: Wiring Connections On A Powerscout Meter

    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. ...

  • Page 38: Using The Pulse Output Port Function

    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.

  • Page 39: Modbus Output Port Registers

    ODBUS UTPUT EGISTERS Modbus Offset Register Name Detailed Description Register 0 = output LOW (closed) Port 1 output control 1 = output HIGH (open) [default] 45302 4401/5301 when used as an on/off— open/closed switch Register 45110 must = 0 to use 0 = No pulses, Port may be used as an on/off—...

  • Page 40: Wiring Cts

    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 (+, –) RōCoil *3-wire (+, –, shield) 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.

  • Page 41: Connecting Split-Core Style Millivolt Cts To A Load

    ONNECTING PLIT TYLE ILLIVOLT S TO A 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.

  • Page 42: Connecting Rōcoil Cts To A Load

    5) Connect the white wire on the CT to the positive terminal on the measuring device. 6) Connect the black wire on the CT to the negative terminal on the measuring device. ? Correct orientation of a CT is required to ensure proper measurement. If an arrow is shown on the CT label, it should be pointed toward the load.
  • Page 43 Positive Negative Shield Connecting RōCoil CTs Mini-hinged CTs attached to load PowerMeterStore 1.877.766.5412 www. .com Shop for Dent products online at:...

  • Page 44: Ct Wire Lead Polarity

    CT W OLARITY CT Type CT Lead + CT Lead - Rogowski (RōCoil) White Brown Split Core mV White Black Clamp On mV 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.

  • Page 45: Powering The Meter

    OWERING THE ETER 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. OWER COUT INGLE HASE ONNECTIONS The PowerScout meter can be used to monitor single- phase loads.
  • Page 46 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.

  • Page 47: Powerscout 24 Wiring Diagrams

    PowerScout 24 Wiring Diagrams The following diagrams use a PowerScout 24 board for illustration. HREE ELTA Use a Service Type 0 (zero) value for BACnet Object 12080 or a 0 (zero) value for Modbus Register 44607 on this wire configuration.

  • Page 48: Three Phase, Four Wire Delta (Wild Leg)

    HREE HASE ELTA Use a Service Type 0 (zero) value for BACnet Object 12080 or a 0 (zero) value for Modbus Register 44607 on this wire configuration. PowerMeterStore 1.877.766.5412 www. .com Shop for Dent products online at:...

  • Page 49: Single Phase, Two Wire

    INGLE HASE 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.

  • Page 50: Single Phase, Three Wire

    INGLE HASE HREE 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.

  • Page 51: 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. PowerMeterStore 1.877.766.5412 www. .com Shop for Dent products online at:...

  • Page 52: Verifying Installation With Phasechek

    Verifying Installation with PhaseChek™ PhaseChek is a feature of the PowerScout series instruments that simplifies installation by ensuring proper CT orientation and avoiding faulty data collection. ERIFYING THE OWER COUT ETER ETUP SING THE 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 ...

  • Page 53: Phasechek Error Table

    HASE RROR ABLE Error Description Correction Setup is correct and the system power factor is greater than 0.55.    -or- All CTs are disconnected. 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 All CTs are incorrectly connected, CT 1, until all LEDs are green.

  • Page 54: Verifying Installation With The Viewpoint Software

    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.

  • Page 55: Read/Write Registers-Read/Set Objects

    —R RITE EGISTERS BJECTS 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.
  • Page 56 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”...

  • Page 57: Firmware

    RS-485. later version of firmware is available, : There are no baud rate settings when download it from the DENT Instruments connected via USB or Ethernet. website. 2) Click Browse to access the Select a Firmware Update File dialog box and select the .hex file downloaded from the website.

  • Page 58: All Things Modbus

    ALL THINGS MODBUS EVICE EGISTERS Modbus Offset Register Description 44201 4200 Model Number 1 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 “...
  • Page 59 Modbus Offset Register Description 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...

  • Page 60: Pulse Output/Input Registers

    Modbus Offset Register Description 50300 10299 CT3 Integer Integer part of CT3 50301 10300 CT3 Decimal Fractional part of NV_CT3 Voltage source = Select voltage phase to associate 50304 10303 CT3 Voltage Source 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.

  • Page 61: Absolute Measurement Registers

    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.
  • Page 62 Description Modbus Offset Register * System=sum of three phases System Total True Power (kW). Unsigned absolute 44003 4002 kW System (ABS) value of ABS (kW L1) + ABS (kW L2) + ABS (kW 44004 4003 kW Demand System Max System Maximum Demand (peak demand). 44005 4004 kW Demand System Now...
  • Page 63 Description Modbus Offset Register * System=sum of three phases 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...
  • Page 64 Description Modbus Offset Register * System=sum of three phases 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 “...

  • Page 65: Positive Power/Energy Measurement Registers

    Description Modbus Offset Register * System=sum of three phases seconds /3600 seconds/Hr) (resettable) 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 until 1 demand window elapses.
  • Page 66 Description Modbus Offset Register * 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)
  • Page 67 Description Modbus Offset Register * 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.
  • Page 68 Description Modbus Offset Register * 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...

  • Page 69: Negative Power/Energy Measurement Registers

    Description Modbus Offset Register * 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 46060 6059 Volts L2 to Neutral...
  • Page 70 Detailed Description Modbus Offset Register * 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...
  • Page 71 Detailed Description Modbus Offset Register * 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.
  • Page 72 Detailed Description Modbus Offset Register * 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...
  • Page 73 Detailed Description Modbus Offset Register * 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...

  • Page 74: Protocol Commands

    Detailed Description Modbus Offset Register * 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.
  • Page 75 Command Example Command Information Layout Command First register to read – low order bits Number of registers to read – high order bits Number of registers to read – low order bits CRC low order bits CRC high order bits 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...
  • Page 76 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 Example Command Information Layout Command PowerScout address Command number Register to write –...
  • Page 77 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 Number, FW Rev Major Revision. Minor Revision, Scalar 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.

  • Page 78: All Things Bacnet

    ALL THINGS BACNET EVICE BJECTS 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.
  • Page 79 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.

  • Page 80: Pulse Output/Input Objects

    ULSE UTPUT NPUT BJECTS 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 Configures the pulse input for pulse output is enabled, it is disabled when this configuration is set.

  • Page 81: Absolute/Net Value Measurement Objects

    BSOLUTE ALUE EASUREMENT BJECTS System=sum of three phases. Description Object Identifier Name * System=sum of three phases 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...
  • Page 82 Description Object Identifier Name * System=sum of three phases 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).
  • Page 83 Description Object Identifier Name * System=sum of three phases 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.

  • Page 84: Positive Power/Energy Measurement Objects

    OSITIVE OWER NERGY EASUREMENT BJECTS Description Object Name Identifier * System=sum of three phases 1080 kW System Average Positive Equals kWh System Positive / (Time Since Reset /3600 seconds/Hr) (resettable) (Signed Net) 1110 kW System Maximum Positive System Highest Instantaneous Positive Draw Since Reset (kW) (Signed Net) 1140 kW System Minimum Positive...

  • Page 85: Negative Power/Energy Measurement Objects

    EGATIVE OWER NERGY EASUREMENT BJECTS Detailed Description Object Name Identifier * System=sum of three phases 1090 kW System Average Negative Equals kWh System Negative / (Time Since Reset /3600 seconds/Hr) (resettable) 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,...

  • Page 86: Appendices

    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.

  • Page 87: Appendix B-Firmware Updates

    PDATES FOR THE OWER COUT 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: http://www.dentinstruments.com/downloads_data_logger_power_meter_drivers_software.

  • Page 88: Appendix C-Veris H8035/H8036 Emulation

    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 can measure, the other Modbus registers described in the table need to be used to utilize the additional capabilities of the PowerScout.

  • Page 89: Veris Modbus Integer Registers

    VERIS M ODBUS NTEGER EGISTERS Modbus Offset ViewPoint Name Description Register 40001 kWh System LSW System True Energy (kWh, Resettable) 40002 kWh System MSW System True Energy (kWh, Resettable) 40003 kW System System True Power (kW) 40004 kVAR System System Reactive Power (kVAR) 40005 kVA System System Apparent Power (kVA)

  • Page 90: Veris Multipliers

    Modbus Offset ViewPoint Name Description Register 40023 Amps L2 " 40024 Amps L3 " Equals KWH_SYSTEM_L&M ÷ (TimeSinceReset_L&M seconds 40025 kW System Avg /3600 seconds/Hr) (resettable) System Minimum Demand (kW, resettable), It displays the default value after a CAM until 1 demand window elapses. After a power 40026 kW Demand System Min cycle or CPU reset the value is not reset but it does not update...
  • Page 91 Address Units ≤ 100A 101 – 400A 401 – 800A 801 – 1600A 1 6 0 1 – 3 2 , 0 0 0A 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...

  • Page 92: Veris Modbus Floating Point Registers

    VERIS M ODBUS LOATING OINT EGISTERS Modbus Offset ViewPoint Name Description Register 40257 VERIS Float kWh System MSW System Net True Energy (kWh, Resettable) 40258 VERIS Float kWh System LSW System Net True Energy (kWh, Resettable) 40261 VERIS Float kW System MSW System Total True Power MSW 40262 VERIS Float kW System LSW...
  • Page 93 Modbus Offset ViewPoint Name Description Register 40280 VERIS Float kW L3 LSW Individual Phase True Power L3 LSW 40281 VERIS Float Apparent PF L1 MSW Individual Phase Apparent Power Factor L1 MSW 40282 VERIS Float Apparent PF L1 LSW Individual Phase Apparent Power Factor L1 LSW 40283 VERIS Float Apparent PF L2 MSW Individual Phase Apparent Power Factor L2 MSW...
  • Page 94 Modbus Offset ViewPoint Name Description Register 40303 VERIS Float Amps L3 MSW Phase Current L3 MSW 40304 VERIS Float Amps L3 LSW Phase Current L3 LSW 40305 VERIS Float kW System Avg MSW System Average Power MSW 40306 VERIS Float kW System Avg LSW System Average Power LSW VERIS Float Demand System Minimum 40307...

  • Page 95: Appendix D-Conversion Table

    Appendix D—Conversion Table ECIMAL TO EXADECIMAL ONVERSION ABLE Some equipment use decimal Modbus addressing. The table below is useful for converting decimal addressing to hexadecimal addressing. Decimal Decimal Decimal Decimal Decimal Decimal PowerMeterStore 1.877.766.5412 www. .com Shop for Dent products online at:...
  • Page 96 Decimal Decimal Decimal Decimal Decimal Decimal Table D-1: Decimal to Hexadecimal Conversion Table PowerMeterStore 1.877.766.5412 www. .com Shop for Dent products online at:...

  • Page 97: Appendix E-Troubleshooting

    Appendix E—Troubleshooting ROUBLESHOOTING OMMUNICATION SSUES 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.”...
  • Page 98 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: ...

  • Page 99: Frequently Asked Questions

    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.
  • Page 100 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.

  • Page 101: Glossary

    GLOSSARY Amp Multiplier A multiplier that changes amperage so that a meter can read higher measurements. Analog Value A type of BACnet object that is a floating point number. On the PowerScout, Analog Value objects are used to represent the electrical measurements. BACnet Building Automation Control networks.
  • Page 102 Root-Mean-Square. True RMS is the AC voltage/current that produces the equivalent amount of heat in a resistor as a DC voltage/current, whether sinusoidal or not. All DENT Instruments meters measure true RMS. RS-485 EIA-485 is used as the physical layer underlying many standard and proprietary automation protocols used to implement Industrial Control Systems, including BACnet/Modbus.

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