1. Manuals
  2. Brands
  3. DENT Instruments Manuals
  4. Measuring Instruments
  5. PowerScout 3
  6. Operator's manual

DENT Instruments PowerScout 3 Operator's Manual

Power meter
Hide thumbs Also See for PowerScout 3:
Table of Contents

Advertisement

Quick Links

Download this manual See also: User Manual
Operator's Guide
3
™
PowerScout
Power Meter
and
™
ViewPoint
Software
PowerScout
3 v1.3/ViewPoint
v2.1
™
™
July 2010

Advertisement

Table of Contents
loading

Related Manuals for DENT Instruments PowerScout 3

Summary of Contents for DENT Instruments PowerScout 3

  • Page 1 Operator’s Guide ™ PowerScout Power Meter ™ ViewPoint Software PowerScout 3 v1.3/ViewPoint v2.1 ™ ™ July 2010...
  • Page 2 Software ©2010 DENT Instruments, Inc. All rights reserved. This manual may not be reproduced or distributed without written permission from DENT Instruments. DENT Instruments | 64 NW Franklin Avenue | Bend, Oregon 97701-2906 USA www.DENTinstruments.com Phone 541.388.4774 | Fax 541.385.9333 |...

  • Page 3: Table Of Contents

    SECTION IV: FIELD INSTALLATION .......................... 12 ™ Mounting the PowerScout 3 ......................12 Connecting the PowerScout 3 ......................12 Completing the Wiring Connections – Modbus, Voltage Leads and CTs ............. 12 Powering the PowerScout 3 ......................... 13 Setting the Modbus Address........................ 13 Establishing Communication ........................
  • Page 4 I/O Port Function ..........................27 Pulse Input ..............................27 Pulse Output ............................. 27 I/O Port Registers ............................. 28 Lock/Synchronize Function ........................29 Using the Lock/Synchronize Command...................... 30 Connecting to a Modbus Network ....................... 30 Modbus Communication Protocol ......................30 Daisy Chain Layout for RS-485 Network ....................30 Networking Using the Modbus Option ......................

  • Page 5: Section I: Introduction

    Up to 254 PowerScout 3 meters may be connected to a single RTU for monitoring and recording power usage at multiple locations within a single site.

  • Page 6: Powerscout™ Safety Summary And Specifications

    Do not use other CTs. 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.

  • Page 7: Powerscout™ Résumé De Sécurité Et Spécifications

    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.

  • Page 8: Powerscout™ Technical Specifications

    PowerScout™ Technical Specifications Specification Description Service Type Single Phase, Three Phase-Four Wire (WYE), Three Phase-Three Wire (Delta) 3 Voltage Channels CATIII 80-346 Volts AC Line-to-Neutral, 600V Line-to-Line Current Channels 3 channels 0-5,000+ Amps depending on current transducer Maximum Current Input 175% of current transducer rating Measurement Type True RMS using high-speed digital signal processing (DSP)

  • Page 9: Section Ii: Quick Start Guide

    Set the computer aside. 4. Securely mount the PowerScout 3 using the two mounting tabs at each end of the case. 5. Mount each current transformer (CTs) on the wire to be monitored. Next, connect the CT leads to the terminal block on the PowerScout starting with the lowest voltage first.

  • Page 10: Powerscout 3 Diagram

    Current Transformer Voltage Leads (CT) Connections ™ PhaseChek LEDs Modbus Address Switches I/O Port Indicator LEDs Communication LED Terminal Block for I/O Terminal Block for RS-485 Port Connections Connection Figure II-1: PowerScout 3 Layout – US voltage wire colors shown...

  • Page 11: Section Iii: Pre-Installation

    SECTION III: Pre-Installation ™ Installation of the RS-422/485 adapter and the ViewPoint software can be completed and tested with ™ the PowerScout prior to the field installation of the meter. Installing the RS-422/485 Adapter to a Computer 1. Insert the CD that came with the USB to RS- 422/485 adapter into your computer.

  • Page 12: Connecting The Rs-422/485 Adapter To The Powerscout

    Connecting the RS-422/485 Adapter to the PowerScout 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. To complete the connection between the PowerScout and the computer, the three wires coming from the RS-422/485 adapter are plugged into the PowerScout.

  • Page 13: Installing The Viewpoint Software And Communicating With The Powerscout

    Installing the ViewPoint Software and Communicating with the PowerScout The ViewPoint software is designed to let you easily configure the PowerScout for different current transformers, check readings and verify correct setup. ViewPoint is compatible with Windows® 7 (32 or 64 bit), Vista (32 or 64 bit), XP or 2000. 1.

  • Page 14: Com - Communications Led

    • If the PowerScout cannot connect to the computer, the COM LED flashes red and returns to a solid green. Change the ViewPoint hardware settings and click Connect again. 4. Viewpoint fills the Device Info fields when the computer communicates with the PowerScout. This completes the ViewPoint software installation and establishing a connection with the PowerScout.
  • Page 15 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 All CTs are incorrectly connected, by move CT 1 to CT 2, CT 2 to CT3 and CT3 to CT1, until all LEDs are green.

  • Page 16: Section Iv: Field Installation

    The PowerScout 3 must be installed in an approved electrical panel or enclosure using proper installation practices according to the local electrical codes. • To mount the PowerScout 3 use the two tabs provided at each end of the case. Securely mount the PowerScout near a dedicated circuit disconnect breaker. Connecting the PowerScout 3 The PowerScout 3 has the following connections: •...

  • Page 17: Powering The Powerscout 3

    Powering the PowerScout 3 The PowerScout 3 is 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. Setting the Modbus Address There are two rotary modbus address switches on the PowerScout, labeled Upper and Lower.

  • Page 18: Powerscout 3 Wiring Diagrams

    ViewPoint. PowerScout 3 Wiring Diagrams The PowerScout 3 can be wired using any one of the following five common wiring setups. These diagrams will assist you in properly connecting your PowerScout for the setup desired. ALL WIRE COLORS ARE U.S. STANDARD.
  • Page 19 Figure IV-1: Single Phase, Two Wire N = white L1 = black L2 = red L3 = blue...
  • Page 20 Figure IV-2: Single Phase, Three Wire N = white L1 = black L2 = red L3 = blue...
  • Page 21 Figure IV-3: Three Phase, Three Wire Delta N = white L1 = black L2 = red L3 = blue...
  • Page 22 Figure IV-4: Three Phase, Four Wire Wye N = white L1 = black L2 = red L3 = blue...
  • Page 23 Figure IV-5: Three Phase, Four Wire Delta N = white L1 = black L2 = red L3 = blue...

  • Page 24: Section V: Using The Viewpoint ™ Software

    ™ SECTION V: Using the ViewPoint Software For ViewPoint 2.1 and Later Overview of the ViewPoint Screens ViewPoint has five screens accessed by tabs. Click each tab to display the screen. Communications The Communications screen provides the setup parameters that allow ViewPoint to ™...

  • Page 25: Realtime Values

    The Realtime Values screen displays the current readings for verifying the system is configured properly. Element – The PowerScout 3 is a single meter and cannot be changed from Element A. The table in the middle section of the screen...

  • Page 26: Ct Values

    Set – Select the checkbox to send the settings to the meter. Element – Indicator for the meter to send settings to. The PowerScout 3 is a single meter so only Element A is available. CT Type – Use the drop-down menu to select the type of CT attached to the PowerScout.

  • Page 27: Firmware

    The Firmware screen verifies the current firmware version and updates the PowerScout 3 internal firmware. Element - The PowerScout 3 is a single meter and cannot be changed from Element A. Firmware Update File – The file containing the new firmware version can be entered using the box or located with the Browse button.

  • Page 28: Viewpoint Buttons

    Cancel Update– Cancels a firmware update while it is in progress. Connect – Establishes a connection between ViewPoint and the PowerScout 3. If a connection is not established, a message displays in the Status window. Help – Displays the help information for the current screen. The help information uses a web browser to display the information for the current screen.

  • Page 29: Section Vi: Other Functions

    SECTION VI: Other Functions Resetting Modbus Registers ™ Many 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. ™...

  • Page 30: Selecting A Scalar

    After selecting a data scalar, the formula for calculating the actual value is: NOTE: The register register value X scalar value = actual value value must be less Or, another way to state this formula is: than 65,535. actual value/scalar value = register value Selecting a Scalar The following table is an example when selecting a data scalar for 3-phase loads based on the CT size or maximum current.

  • Page 31: Values Requiring Two Registers

    I/O Port Function The PowerScout 3 has two configurable I/O ports, 1 and 2. Each port can be set to one of two functions, input or output, but not to both functions at one time. The ports can be used for pulse input and output counting, or for a relay device for remote control.

  • Page 32: I/O Port Registers

    I/O Port Registers Refer to the following four tables to configure the PowerScout’s two I/O ports. Modbus Offset Register Name Detailed Description Register 0 = input LOW (switch is closed) 44400 4399 I/O port 1 status 1 = input HIGH (switch is open) 0 = off, pulse input disabled 1 = rising edge, pulse counter increments, falling edges are ignored.

  • Page 33: Lock/Synchronize Function

    Table VI-6: I/O Port 2 Pulse Output Lock/Synchronize Function Multiple PowerScout 3 meters can be installed on a single modbus network. A snapshot of the power or voltage can be obtained simultaneously for meters on a network. Usually, the RTU reads the values from each meter sequentially, thus readings from meters can vary by several seconds.

  • Page 34: Using The Lock/Synchronize Command

    retrieved values were recorded just before the lock command was sent by the RTU. The command contains the number of seconds, timeout, needed to read from the meters. Using the Lock/Synchronize Command 1. Send a standard write command for register 40129 (offset Note: During the lock period, no 128) with a data value that includes the number of seconds data is lost.

  • Page 35: Section Vii: Faqs

    How many PowerScout 3 instruments can be connected together? Up to 254 PowerScout 3 meters can be connected together. How is hexadecimal (HEX) to decimal converted? Use the Hexadecimal to Decimal conversion table in the Appendix section of this manual.

  • Page 36: Glossary

    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 modbus.
  • Page 37 A Remote Terminal Unit (RTU) is a microprocessor controlled electronic device which interfaces objects in the physical world to a distributed control system or SCADA system by transmitting telemetry data to the system and/or altering the state of connected objects based on control messages received from the system. SCADA SCADA stands for Supervisory Control And Data Acquisition.

  • Page 38: Section Viii: Appendixes

    SECTION VIII: Appendixes Appendix A – Decimal to Hexadecimal Conversion Table ™ Decimal values are used for the PowerScout addresses. The hex value is the corresponding value set on the upper and lower rotary modbus address switches on the PowerScout. •...
  • Page 39 Decimal Decimal Decimal Decimal Decimal Decimal Table Appendix A-1: Decimal to Hexadecimal Conversion Table...

  • Page 40: Appendix B - Veris H8035/H8036 Emulation

    Appendix B – 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 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 41 CT Amperage Rating Veris Model Number Veris Type = H8036-2400-4 CT >1600A CT Value = 2400A Table Appendix B-1: CT Amp Rating to Veris Models Modbus Offset ViewPoint Name Description Register 40001 kWh System LSW System True Energy (kWh, Resettable) 40002 kWh System MSW System True Energy (kWh, Resettable)

  • Page 42: Appendix C - Installing Firmware Updates For The Powerscout ™ 3

    ™ Appendix C – Installing Firmware Updates for the PowerScout PowerScout 3 firmware updates are available from DENT Instruments, typically contained in a zip file ™ that can be downloaded, unzipped and installed using ViewPoint . The PowerScout 3 requires ViewPoint 2.1 or later.
  • Page 43 4. Select the Firmware tab in ViewPoint. Click Browse to locate the extracted firmware files. Click Update to start the firmware update. 5. When the update completes, ViewPoint displays a message window confirming a successful update.
  • Page 44 • Set register 44402 = 1 (for I/O 1), 44403 = 1 (for I/O 2). • Wait 60 seconds before power cycling the PowerScout 3, to save the settings. Method 2 - Enable input pulse counting: • Set register 45100 = 1 (for I/O 1), 45200 = 1 (for I/O 2).

  • Page 45: Appendix D - Troubleshooting Communication Issues

    1. In ViewPoint, set the Modbus Base Address Switches field to 00. 2. On the PowerScout 3, set both the upper and lower modbus address switches to 0. 3. Press the Connect button. With both settings at 00, ViewPoint and the PowerScout will communicate at a 9600 baud rate regardless of a baud rate mismatch.

  • Page 46: Firmware Update Fails

    Firmware Update Fails When the firmware update fails, select a slower baud rate and retry the update. Other Communication Failures 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.

  • Page 47: Appendix E - Powerscout Modbus Register Assignment Tables

    Appendix E – PowerScout Modbus Register Assignment Tables Modbus Register Assignments Offset refers to a base of 40001. Modbus Offset Register Description 44001 4000 kWh System LSW System Total Net True Energy LSW (kWh) 44002 4001 kWh System MSW System Total Net True Energy MSW (kWh) 44003 4002 kW System...
  • Page 48 Modbus Offset Register Description Individual Phase Apparent Energy MSW (kVAh) 44042 4041 kVAh L1 MSW 44043 4042 kVAh L2 LSW 44044 4043 kVAh L2 MSW 44045 4044 kVAh L3 LSW 44046 4045 kVAh L3 MSW Individual Phase Apparent Powers (kVA) 44047 4046 kVA L1...

  • Page 49: Configuration Registers

    Configuration Registers Modbus Offset Register Description 44525 4524 CT Type 1=mV, 2=Rogowski (RoCoil) 44526 4525 Slave ID !1=DENT, 1=Veris; Sets SLAVE_ID to Veris or DENT 44599 4598 CT Phase Shift CT Phase Shift X 100 +/- Multiply volts values by this scalar. Use with Step- down Transformer.

  • Page 50: Positive Power Measurement Registers

    Positive Power Measurement Registers Modbus Offset Register Description 46001 6000 Positive kWh System LSW System Positive True Energy LSW (kWh, resettable) 46002 6001 Positive kWh System MSW System Positive True Energy MSW (kWh, resettable) System Positive Instantaneous Positive True Power 46003 6002 Positive kW System...

  • Page 51: Negative Power Measurement Registers

    Modbus Offset Register Description Individual Phase Positive Instantaneous Reactive 46038 6037 Positive kVAR L1 Powers (kVAR) 46039 6038 Positive kVAR L2 " 46040 6039 Positive kVAR L3 " Individual Phase Positive Displacement Power Factors (dPF); Register is 100x actual value (If the Individual 46050 6049 Positive Displacement PF L1...
  • Page 52 Modbus Offset Register Detailed Description Individual Phase Negative True Energy LSW (kWh, 47023 7022 Negative kWh L1 LSW resettable) Individual Phase Negative True Energy MSW (kWh, 47024 7023 Negative kWh L1 MSW resettable) 47025 7024 Negative kWh L2 LSW " "...

  • Page 53: Appendix F - Modbus Commands

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

  • Page 54: Write Single Register

    Example Command This command reads from a PowerScout 3 with an address switch setting of 37 hex (55 in decimal), reading one byte starting at register offset 0C hex (12 in decimal). Note that offset 12 corresponds to modbus register 40013. All values are hexadecimal; spaces are not sent.

  • Page 55: Report Slave Id

    Example Command This command writes to a PowerScout 3 with an address switch setting of 37 hex (55 in decimal), writing one byte at register 000C, and writing a value of 00 to clear the KWH registers. The data value of 0 is sent to register 0.
  • Page 56 Table F-7: Format for Modbus Command 11 (17 in decimal) Slave ID The PowerScout uses the following default format for the slave ID: 00hFFhDENT Instruments PowerScout 3, Serial Number, FW Rev Major Revision. Minor Revision, Scalar X Example: 00hFFhDENT Instruments PowerScout 3, PS3912001, FW Rev 1.0, Scalar 3 The 00h is used for version control and the FFh indicates the meter is active.

Table of Contents