Setra Power Patrol Operating Manual

Operator’s Guide

Power Patrol Power Meter

Includes:

Power Patrol

and

HeadStart 1.0 Software

June 2, 2014

ii

Setra Systems, Inc. | 159 Swanson Rd. | Boxborough, MA 01719 USA

Phone 978.263.1400 | Fax 978.264.0292 | www.setra.com

iii

Table of Contents

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

The Power Patrol Power Meter ............................................................................................................... 6

Power Patrol Meter Safety Summary and Specifications ........................................................................ 6

Symbols on Equipment ............................................................................................................................ 7

Power Patrol Résumé de Sécurité et Spécifications ................................................................................ 9

Symboles des Equipements ..................................................................................................................... 9

Power Patrol Meter Technical Specifications ........................................................................................ 11

FIELD INSTALLATION .................................................................................................................. 13

Mounting a Power Patrol Meter ............................................................................................................ 13

Wiring Connections on a Power Patrol Meter ....................................................................................... 13

Wiring CTs .............................................................................................................................................. 14

CT Wire Lead Polarity .......................................................................................................................................14

Connecting a Communication Cable...................................................................................................... 15

Connecting via a USB Cable Adapter ................................................................................................................15

Connecting via a RS-485 Adapter .....................................................................................................................15

Installing the RS-485 Adapter to a Computer ..................................................................................................16

Connecting via an Ethernet Cable ....................................................................................................................17

Powering the Power Patrol Meter ......................................................................................................... 17

Power Patrol Single-Phase Connections ..........................................................................................................17

COM—Communications LED ................................................................................................................. 18

Power Patrol (Serial & Ethernet Communication) ...........................................................................................19

Phase Verification .................................................................................................................................. 19

Verifying the Power Patrol Meter Setup Using the LEDs .................................................................................19

Phase Verification Error Table ..........................................................................................................................20

Power Patrol Meter Diagram ................................................................................................................. 21

COMMUNICATING WITH A POWER PATROL METER ........................................................................... 22

Setting the Network Address Switches .................................................................................................. 23

Installing the HeadStart Software and Communicating with the Power Patrol Meter ......................... 24

Communication Setup ......................................................................................................................................24

About IP Addresses ..........................................................................................................................................27

Connecting the Ports ........................................................................................................................................29

Establishing Communication Protocol ................................................................................................... 29

Using HeadStart Software...................................................................................................................... 30

HeadStart Screens ............................................................................................................................................30

iv

Communication and Status Messages .............................................................................................................30

HeadStart Command Buttons ..........................................................................................................................30

Communications .................................................................................................................................... 31

Setting USB Communication Parameters .........................................................................................................31

Setting Serial Communication Parameters ......................................................................................................32

Setting Ethernet Communication Parameters .................................................................................................33

Communication Error .......................................................................................................................................35

Meter Setup ........................................................................................................................................... 36

Entering Wiring Information for an Element ...................................................................................................37

Comms. Setup ........................................................................................................................................ 38

Real-Time Values ................................................................................................................................... 38

Using Real-Time Values to Verify Setup ...........................................................................................................39

Read/Write Registers—Read/Set Objects ............................................................................................. 40

Resetting BACnet Objects/Modbus Registers ..................................................................................................41

Sync Registers...................................................................................................................................................41

Firmware ................................................................................................................................................ 42

SECTION IV—ALL THINGS MODBUS.............................................................................................. 43

Modbus Data Scaling—Interpreting the Power Patrol Registers .....................................................................43

Selecting a Scalar ..............................................................................................................................................44

Examples Using a Data Scalar ...........................................................................................................................44

Values Requiring Two Registers .......................................................................................................................45

Configuration Registers ....................................................................................................................................45

Pulse Output/Input Registers ...........................................................................................................................46

Absolute/Net Value Measurement Registers ..................................................................................................47

Positive Power/Energy Measurement Registers ..............................................................................................51

Negative Power/Energy Measurement Registers ............................................................................................55

Protocol Commands .........................................................................................................................................60

v

SECTION V—ALL THINGS BACNET ............................................................................................... 64

Configuration Objects ......................................................................................................................................64

Pulse Output/Input Objects .............................................................................................................................66

Absolute/Net Value Measurement Objects .....................................................................................................66

Positive Power/Energy Measurement Objects ................................................................................................69

Negative Power/Energy Measurement Objects ...............................................................................................70

APPENDICES ............................................................................................................................ 71

Appendix A—Power Patrol Meter Wiring Diagrams ............................................................................. 71

Power Patrol Plus Wiring Diagrams..................................................................................................................72

Appendix B—Connecting to a Network ................................................................................................. 75

Communication Protocol .................................................................................................................................75

Daisy Chain Layout for RS-485 Network ...........................................................................................................75

Networking Using the BACnet/Modbus Protocol ............................................................................................75

Appendix C—Digital I/O Functions ........................................................................................................ 76

Digital Pulse Outputs ........................................................................................................................................76

Appendix D—VERIS H8035/H8036 Emulation ....................................................................................... 78

VERIS Modbus Integer Registers ......................................................................................................................79

VERIS Multipliers ..............................................................................................................................................80

VERIS Modbus Floating Point Registers ...........................................................................................................82

Appendix E—Conversion Table.............................................................................................................. 85

Decimal to Hexadecimal Conversion Table ......................................................................................................85

Appendix F—Troubleshooting ............................................................................................................... 87

Troubleshooting Communication Issues ..........................................................................................................87

FREQUENTLY ASKED QUESTIONS .................................................................................................. 88

GLOSSARY .............................................................................................................................. 90

6

This general safety information is to be used by both the Power Meter operator and servicing personnel. Setra Systems, Inc. assumes no

liability for user’s failure to comply

with these safety guidelines.

PS3037-X-X

These items conform to the following:

Conforms to UL Std 61010-1, 3rd Edition & IEC 61010-2-030, 1st Edition

Certified to CSA Std C22.2 No. 61010-1, 3rd Edition

The Power Patrol 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.

INTRODUCTION

The Power Patrol meter monitors the voltage, current, power, energy, and many other electrical parameters on single- and three-phase electrical systems. A Power Patrol meter uses direct connections to each phase of the voltage, and uses current transformers or Rogowski coils 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 meter is an USB communication, or RS-485 serial/Ethernet connection that uses the BACnet Master Slave Token Passing (MS/TP) protocol or 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 Power Patrol to provide data recording and trend logging plus a human interface or display.

POWER PATROL

The Power Patrol is light-weight and compact enough to mount within an electrical panel. It is typically used for long-term monitoring of electrical systems.

Up to 127 Power Patrol meters may be connected to a single BACnet client for monitoring and recording power usage at multiple locations within a single site. Up to 247 meters may be connected to Modbus.

There is a configurable digital pulse output port on the Power Patrol 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.

Power Patrol Meter Safety Summary and Specifications

7

WARNING

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

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

When connecting the Power Patrol 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.

Hazardous voltage exist, there are no user serviceable parts inside. Do not open the enclosure.

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 Power Patrol is a 600 Volt Over Voltage Category III device.

Pulse output: 30V max open voltage, 5mA max current. See the appendix for pulse output usage.

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 Setra Systems CTs that are UL Recognized and have been evaluated to IEC 61010-1:

CT‐SCP‐020 (20A), CT‐SCP‐050 (50A), CT‐SCP‐0100 (100A), CT‐SCP‐0200 (200A), CT-PF-12 (Power Flex Rogowski Coil), CT-PF-24 (Power Flex Rogowski Coil) and the CT-PF-36 (Power Flex Rogowski Coil).

FCC COMPLIANCE

SPP-E-N, SPP-E-D, SPP-S-N, SSP-S-D

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.

Symbols on Equipment

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

MAINTENANCE

There is no required maintenance with the Power Patrol. Abide by the following items: Cleaning: No cleaning agents, including water, should be used on the Power Patrol. 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 Setra Systems for service.

No accessories are approved for use with the Power Patrol other than those specified in the Setra Systems product literature and price sheets.

If the power Meter appears damaged or defective, first disconnect all power and sensors. Call or email technical support for assistance.

Setra Systems, Inc. 159 Swanson Road Boxborough, MA 01719 Phone: 978-263-1400 www.setra.com

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

PS3037-X-X

Tous les articles sont conformes à ce qui suit:

Conforme à UL Std 61010-1, 3rd Edition & IEC 61010-2-030, 1st Edition

Certifié CSA Std C22.2 No. 61010-1, 3rd Edition

Le Power Patrol 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.

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

En faisant la connexion du Power Patrol 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.

Tension dangereuse existent, il n'y a aucune pièce réparable par l'utilisateur n'ouvrez pas le boîtier.

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 Power Patrol est un appareil à 600 V de surtension de catégorie III.

Power Patrol Résumé de Sécurité et Spécifications

Symboles des Equipements

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Sortie d'impulsion: 30V max tension ouverte, 5 mA courant maxi. Voir l'appendice pour sortie d'impulsions l'utilisation.

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 Setra Systems suivants qui sont énumérés jusqu'au 600V/CATIII.

CT‐SCP‐020 (20A), CT‐SCP‐050 (50A), CT‐SCP‐0100 (100A), CT‐SCP‐0200 (200A), CT-PF-12 (Power Flex Rogowski Coil), CT-PF-24 (Power Flex Rogowski Coil) and the CT-PF-36 (Power Flex Rogowski Coil).

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

Entretien

Il n'y a aucun entretien requis avec le Power Patrol. Respectez les points suivants: Nettoyage: Aucun agents de nettoyage, y compris l'eau, doit être utilisé sur le Power Patrol. 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 Power Patrol 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.

Setra Systems, Inc. 159 Swanson Road Boxborough, MA 01719 Phone: 978-263-1400 www.setra.com

Email:

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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

3 channels, 0.525 VAC max, 333 mV CTs, 111 mV Rogowski coils, 0-4,700+ Amps depending on current transducer

Maximum Current Input

158% of current transducer rating (mv CTs) to maintain accuracy. Measure up to 4000 Amps Power Flex Rogowski Coil

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 SPP: 90mA Max, Non-user replaceable .5 Amp internal fuse protection

Power Out

Unregulated 5VDC output, 140 mA max

Waveform Sampling

12 kHz

Parameter Update Rate

.5 seconds

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

Meter: 0.2% (<0.1% typical) ANSI, C12.20-2010 Class 0.2

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 (Green when voltage and current on the same phase; Red when incorrectly wired.) Pulse output LED, Power On LED

Pulse Output

Open Collector, Optically Isolated , 5mA max current, 30V max open voltage

Communication

Direct

User Selectable Modbus RTU or TCP; BACnet Master Slave Token Passing protocol (MS/TP) RS-485 or IP (Ethernet)

Serial Meters

Max Communication Length

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

Communication Rate (baud)

Modbus: 9600 (Default), 19200, 38400, 57600, 76800, 115200 BACnet: 9600, 19200, 38400, 76,800 (Default)

Data Bits

8

Parity

None, Even, Odd

Stop Bit

2, 1

Data Formats

BACnet IP, BACnet MS/TP, Modbus TCP, Modbus RTU

Mechanical

Operating Temperature

-7 to + 60⁰ C (-20 to 140⁰ F)

Humidity

5% to 95% non-condensing

Enclosure

ABS plastic, 94-V0 flammability rating

Power Patrol Meter Technical Specifications

12

Specification

Description

Weight

366.5 g (12.92 oz, 0.808 lbs)

Dimensions

24.2 x 8.5 x 4.0 cm (9.5” x 3.3” x 1.6”)

Ingress Protection (IP) Rating

20

HeadStart 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:

SPP-E-N, SPP-E-D, SPP-S-N, SPP-S-D

Power Patrol Meter

Conforms to UL Std 61010-1, 3rd Edition & IEC 61010-2-030, 1st Edition Certified to CSA Std C22.2 No. 61010-1, 3rd Edition

Table I-1: Technical Specifications

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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.

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

Mounting tab,

end of meter case

FIELD INSTALLATION

Mounting a Power Patrol Meter

The Power Patrol meter must be installed in an approved electrical panel or enclosure using proper installation practices according to the local electrical codes.

 To mount the Power Patrol, use the two tabs provided at both ends of the case. Securely mount

the Power Patrol near a dedicated circuit disconnect breaker.

Figure I-1: Power Patrol mounting tabas

Wiring Connections on a Power Patrol Meter

The Power Patrol meter has the following connections:

 Either a three-wire connector for the RS-485 BACnet/Modbus link and/or an Ethernet

connector.

 Four voltage connections. Voltage leads are customer supplied. The Power Patrol meter is self-

powered from L1 and L2.

located on each

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

CT Type

CT Lead +

CT Lead -

Shield

Power Flex (Rogowski coil)*

Red

Black

Shield Wire

Split Core CT mV (SCP, SCM series)

White

Black

CT Inputs

Ethernet

Port

RS-485

Digital

Voltage Connections

USB Port

Port

Output Port

 3 CT inputs  Digital output ports. The ports can be used to output kWh, kVARh, or kVAh pulses to external

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

 USB port for powering the meter during setup

Wiring CTs

1) Insert the CT wires into the connector/s. See the following CT wire lead polarity table for the correct

wiring configuration.

CT WIRE LEAD POLARITY

2) Attach the CT connectors onto the Power Patrol connections labeled CT 1, CT 2 and CT 3.

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

voltage leads. The CT labeled CT 1 must be placed on L1 phase voltage wire, CT 2 must be on the L2 voltage and CT 3 on the L3 voltage. Refer to Phase Verificatio later in this section for information about the CT LEDs and verifying the CT installation.

NOTE: The directionality for Rogowski Coils is the arrow on the label pointing toward the

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

Table II-1: CT Polarity

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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.

Figure II-2: Dip switches on back

Connecting Communication Cable

Communication between a Power Patrol meter and a logger or computer is established with an USB cable, a serial RS-485 adapter or an Ethernet connection. A serial connection (RS-485) is limited in speed while a parallel connection (Ethernet) or USB connection is much faster.

NOTE: Configuration of Power Patrol meter can be completed prior to field installation by powering device via computer and USB cable using HeadStart software.

CONNECTING VIA A USB CABLE

Connect one end of USB cable into the Power Patrol and the other end into your computer. To begin communicating via an USB cable you must first set it up with HeadStart Software. See USB Connection in the Communicating with a Power Patrol Meter section.

CONNECTING VIA A RS-485 ADAPTER

To complete the connection between the Power Patrol meter and the computer, the three wires coming from the RS-485 adapter are plugged into the Power Patrol.

Insert each white ferrule into the appropriate RS-485 connection on the Power Patrol. The red wire inserts in (+), the black wire in (-) and the green wire in GND, Figure II-1.

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.

The adapter is ready to be connected to the Power Patrol meter.

of RS-485 Adapter

Figure II-1: RS-485 Adapter

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INSTALLING THE RS-485 ADAPTER TO A COMPUTER

Installation of an RS-485 adapter and HeadStart software can be completed and tested with a meter prior to the field installation.

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

computer.

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

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CONNECTING VIA AN ETHERNET CABLE

Connect one end of the Ethernet cable into the Power Patrol and the other end into your computer. To begin communicating via an Ethernet cable you must first set it with HeadStart software. See Ethernet

(TCP/IP) Connection in the Communicating with a Power Patrol Meter section.

Powering the Power Patrol Meter

The Power Patrol meter can be powered through USB cable and computer prior to field installation for configuration purposes.

For field installation, connect the Power Patrol meter 14 AWG THHN Minimum 600VAC rating (or equivalent in order to maintain 600VAC safety rating of the device) voltage leads as close as possible to a building-installed, dedicated circuit disconnect breaker. Mark the breaker as the “disconnect” for the Power Patrol. Refer to the wiring diagrams in the Appendix for specifics of the wiring connections.

Follow local electrical codes during this installation.

Figure II-3: Voltage leads into circuit breaker

The Power Patrol meter 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.

POWER PATROL SINGLE-PHASE CONNECTIONS

The Power Patrol meter can be used to monitor single-phase loads. There are several guidelines to keep in mind about this type of connection:

1) The Power Patrol is powered from a potential between L1 and L2. This can be phase-to-phase (230V)

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

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

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

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

calculations.

18

BACnet

Modbus

Description

Steady Green

Power is applied to the meter.

Flashing Green

The meter is communicating.

Steady Red

Communications failure, or talking with BACnet while the meter is in Modbus mode.

Flashing Red

The meter is receiving communication on the bus for a meter at another address.

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

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

A Typical 115V Single-Phase Panel Setup

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

System Values

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

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

COM—Communications LED

The Power Patrol COM LEDs signal the following communication information.

POWER PATROL (SERIAL COMMUNICATION ONLY)

Table II-2: Serial COM LED Signals

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BACnet/Modbus

Description

Steady Green

Power is applied to the meter.

Flashing Green

The meter is communicating.

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

Phase Verification LEDs

POWER PATROL (SERIAL & ETHERNET COMMUNICATION)

The Ethernet cable has a Link LED on its connector that glows amber when connected to the network and flashes green during Ethernet traffic.

Table II-3: Ethernet COM LED Signals

Phase Verification

Phase Verification is a unique feature of the Power Patrol meter that simplifies installation by ensuring proper CT orientation and avoiding faulty data collection.

VERIFYING THE POWER PATROL METER SETUP USING THE LEDS

The Power Patrol meter uses three bi-color Phase Verification LEDs to check each phase. These LEDs provide the following information:

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

placed on the corresponding voltage phases.

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

20

CT1

CT2

CT3

Error Description

Correction

  

Setup is correct and the system power factor is greater than 0.55.

-or-

All CTs are disconnected.

Connect the CTs.

  

All CTs are incorrectly connected,

-or-

The system power factor is less than 0.55.

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

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

  

CT 2 and CT 3 are reversed.

Switch the position of the CTs flashing red.

  

CT 1 and CT 2 are reversed.

Switch the position of the CTs flashing red.

  

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

Switch CT 1 with CT 2.

-or-

Switch CT 1 with CT 3.

  

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

Switch CT 2 with CT 1.

-or-

Switch CT 2 with CT 3.

  

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

Switch CT 3 with CT 1.

-or-

Switch CT 3 with CT 2.

  

CT 1 and CT 3 are reversed.

Switch the position of the CTs flashing red.

The following table describes the Phase Verification error conditions and the appropriate correction.

PHASE VERIFICATION ERROR TABLE

Table II-4: Phase Verification LED Error Resolution

21

EXAMPLE POWER PATROL WIRING DIAGRAM

Below is an example wiring diagram for a four-wire WYE. More wiring diagrams are available in the appendix.

Figure II-4: 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.

22

COMMUNICATING WITH POWER PATROL METER

There are a few things to determine before starting to communicate with your Power Patrol meter. Are you using BACnet or Modbus as your communication protocol? Will you use your own logger/controller to record measurements, or will you use the HeadStart software supplied with the meter to read realtime values? Is the data delivered over an RS-485 adapter or via the Ethernet? These determinations figure into how you set up the Power Patrol meter for operation.

 BACnet vs. Modbus

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

 Customer-supplied logger vs. HeadStart

Communication configuration must be set up in the HeadStart software even if you use a separate logger to record data

 RS-485 vs. Ethernet

The type of connection is part of the configuration set up in the HeadStart 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

23

Setting the Network Address Switches

Hexadecimal

Address

BACnet Address Availability

00

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

01-7F

Available (01 is the factory default setting).

80-FE

Reserved for BACnet slave devices.

FF

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

There are two rotary network address switches on a serial Power Patrol, labeled MSB (Most Significant Byte) and LSB (Least Significant Byte). These two switches are used to select the BACnet/Modbus address the client uses to communicate with the Power Patrol meter.

The rotary switches are 16-position, hexadecimal switches. The default factory setting is hex 01. The address is a hexadecimal (hex) value, represented by the digits 0 through 9 and letters A through F. For example, a network address of 100 in decimal is converted to 64 hexadecimal and set on the Power Patrol by:

 Upper switch—select 6  Lower switch—select 4

In some cases the hex value may need to be converted to decimal when entered into the RTU or data logger. See the Appendix for a hexadecimal conversion table.

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

Table III-1: BACnet Hexadecimal/Decimal Address Availability

24

Hexadecimal

Address

Modbus Address Availability

00

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

01-F7

Available for Modbus slave devices.

FF

Reserved for network wide broadcast.

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

N/A

Reserved for communication protocol settings. The rotary switches can be used to configure the communication protocol to BACnet or Modbus as well as changing the baud rate if unsure of the current settings.

Table III-2: Modbus Hexadecimal/Decimal Address Availability

Installing the HeadStart Software and Communicating with the Power Patrol Meter

The HeadStart software is designed to let you easily configure the Power Patrol for different current transformers, check readings, and verify correct setup. HeadStart is compatible with Windows® 7 (32 or 64 bit), Windows® 8 Pro, Vista (32 or 64 bit), or XP.

 Order flash drive with HeadStart software or download installer from

www.setra.com/powerpatrol

Browse to the USB flash drive folder and locate the HeadStartInstaller.exe program. If installer was downloaded from website, unzip folder and executable program. Start the installer by double-clicking

HeadStartInstaller.exe.

COMMUNICATION SETUP

HeadStart can read information through a RS-485 isolated COM port, an Ethernet connection, or through USB port. When the RS-485 connection is selected a base address is required (the base address is the rotary switch settings). When the Ethernet connection is selected an IP address is required. The screen display changes based on your connection selection. When USB connection is selected no other address is necessary.

USB Connection

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

2) Select the PC COM Port from the drop-down list.

3) Click Connect. Status box will show a connected status.

25

RS-485 Connection

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

2) Select Modbus or BACnet as your communication protocol.

3) Enter a base address that matches the switches on the Power Patrol meter.

4) Select the PC COM Port from the drop-down list.

5) Click Connect. Status box will show a connected status.

Default settings are used for the two remaining fields: Data Bits is 8N1 and the Baud Rate is 9600.

NOTE: If HeadStart 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.

26

Ethernet (TCP/IP) Connection

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.

2) Select your mode of communication.

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

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

-or-

Use the Scan Network or Setup buttons to acquire a new IP Address. See About IP Addresses.

4) Enter the Port connected to the Power Patrol meter. A checkbox is available to make the port the

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

5) Click Connect. Status box will show a connected status.

27

ABOUT IP ADDRESSES

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

NOTE: A Static IP address of 10.75.75.63 is assigned in the factory to all Ethernet Power Patrol meters.

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

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

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

select Use DHCP. This may avoid the need of a network administrator as the router will assign an IP address that does not conflict with any other devices on the network. A disadvantage of the

DHCP option is that the “lease” of the IP address may expire after a period of time and the

router could assign a different IP address. A new IP address means that HeadStart cannot connect to the meter until the new IP address has been entered. (See below.)

An additional option is to set the Power Patrol meter to DHCP and go to the router and assign a specific IP address to the MAC address that corresponds to the logger. In this way, if the lease does expire, the router will always assign the same IP number back to the logger. This option may also require a network administrator.

The Scan Network button scans the network for possible meters and displays them in the Logger Selection dialog box. Look for the serial number on the meter (found on the back of the meter) to determine which connection point is yours.

28

Authority).

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

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

DID YOU KNOW? Setra Systems uses well-known and registered port numbers for BACnet (47808) and Modbus (502) assigned by the IANA (Internet Assigned Numbers

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

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

 Click Update Logger after making your selections.

HeadStart displays the following message when the connection is successful.

29

CONNECTING PORTS

Parameter

Defaults

Modbus Settings

BACnet

Settings

Baud

9600

76800

Data bits

8

Parity

None

Stop Bit

1

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

 When the Power Patrol meter is in the process of connecting to the computer, the

Communication Status LED flashes briefly followed by a solid green.

 If the Power Patrol meter cannot connect to the computer, the Communication Status LED

flashes red and returns to a solid green. Change the HeadStart hardware settings and click Connect again.

HeadStart fills the Device Info fields when the computer communicates with the Power Patrol.

Power Patrol meter installation can be verified using the HeadStart software. Refer to Using HeadStart Software further in this section for more information.

Establishing Communication Protocol

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

 The Modbus/BACnet address on the Power Patrol and in the HeadStart software must be set to

the same value. Refer to Using the HeadStart Software to set the address on the Communications tab and establish a connection.

 The Power Patrol meter default serial parameters are:

Table III-3: Serial Communication Settings

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

NOTE: The baud rate on the user interface (HeadStart) must match the Power Patrol setting. If these settings differ, the Power Patrol cannot communicate.

30

Using HeadStart Software

HeadStart software is used to monitor diagnostics and configure registers with Power Patrol meters. All Power Patrol meters use HeadStart software to communicate with the meter.

The screen displayed for each HeadStart tab can be somewhat different based on the selected meter and the communication protocol (BACnet/Modbus). HeadStart also displays language changes, i.e., registers/objects, in dialog boxes and text fields based on the selected protocol.

The Communications screen is displayed when HeadStart is first started. This is where the software networking parameters are entered to match the Power Patrol networking configuration (PC Interface, COM port, baud rate, base address, etc.). HeadStart remembers your last connection and displays those previous selections when opening the software once again.

HEADSTART SCREENS

HeadStart has six screens accessed by tabs. Click on any tab to display that screen.

 Communications - provides the setup parameters that enable HeadStart to communicate with

the Power Patrol.

 Meter Setup - enables current transformer (CT) type and amperage rating changes.  Comms Setup - enables communications mode (BACnet/Modbus) changes.  Real-Time Values - displays the current readings for verifying the system is configured properly.  Read/Write Registers - provides diagnostic and special configuration options, allowing the

changing or viewing of the value of Power Patrol Modbus registers or BACnet objects.

 Firmware - verifies the current firmware version and updates the Power Patrol internal firmware

when directed.

COMMUNICATION AND STATUS MESSAGES

Common to each screen is a Status field that displays information regarding the current process. Also, a Help button is available in the upper right-hand corner of each screen where you can access information

about the different screens.

HEADSTART COMMAND BUTTONS

Each HeadStart screen includes a row of command buttons at the bottom of the screen. The buttons vary depending on the current screen.

31

Communications

The Communications screen is used to configure the networking options for HeadStart (PC Interface, COM port, Modbus address, etc.)

SETTING USB COMMUNICATION PARAMETERS

1) Select USB/RS-485(MSTP) to gather information via HeadStart software.

2) Enter the PC COM Port connected to the Power Patrol.

-or-

Select one of the previously used addresses from the drop-down list.

3) Click Connect to connect HeadStart with the Power Patrol. The Status field informs you of the

connection process. When the connection is complete, the Device Info fields display Serial Number and Firmware Version of the Power Patrol meter.

32

SETTING SERIAL COMMUNICATION PARAMETERS

1) Select USB/RS-485(MSTP) to gather information via HeadStart software.

2) Enter the PC COM Port connected to the Power Patrol.

-or-

Select one of the previously used addresses from the drop-down list.

3) Select Modbus or BACnet as your communication protocol.

When Modbus is selected as the communication protocol the Communications screen displays a Modbus PC COM Port section for entering port information.

 Enter a Base Address of the meter on the upper and lower address switches. Available Modbus

addresses range from 01 (hex 01) to 247 (hex F7) max. The 00 setting is used to default the Power Patrol communications mode to Modbus, 9600 baud, 8 bits no parity, and 1 stop bit.

When BACnet is selected as the communication protocol the Communications screen displays a BACnet Device ID box to enter the device identification number.

4) Enter the Data Bits. Default setting is 8N1.

5) Enter the Baud Rate. Default setting is 9600 (Modbus) or 76,800 (BACnet).

33

6) Click Connect to connect HeadStart with the Power Patrol. The Status field informs you of the

connection process. When the connection is complete, the Device Info fields display Serial Number and Firmware Version of the Power Patrol meter.

NOTE: If HeadStart 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.

SETTING ETHERNET COMMUNICATION PARAMETERS

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.

2) Select Modbus or BACnet as your communication protocol.

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.

 The Scan Network button scans the network for possible meters. The Logger Selection dialog

box displays.

4) Select the correct device from the list of IP Addresses.

5) Click Setup. The Logger Network Setup dialog box displays, below.  The Setup button displays the Logger Network Setup dialog box where network address

information is entered. See your network administrator before making changes.

34

DID YOU KNOW? Setra Systems uses

Authority).

well-known and registered port numbers for BACnet (47808) and Modbus (502) assigned by the IANA (Internet Assigned Numbers

6) Select the Use DHCP checkbox. The Dynamic Host Configuration Protocol is then used to populate

the IP Address, Subnet Mask, and Gateway Address fields.

7) Select Modbus from the Mode drop-down list.

8) Click Update Logger.

HeadStart displays the following message when the connection is successful.

9) Enter the Port connected to the Power Patrol. A checkbox is available to make the port the default.

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

10) Click Connect to connect HeadStart with the Power Patrol. The Status field informs you of the

connection process. When the connection is complete, the Device Info fields display Serial Number and Firmware Version of the Power Patrol meter.

35

COMMUNICATION ERROR

If HeadStart is unable to communicate with the Power Patrol meter, the Status box displays the

following message: “Unable to establish connection with meter, please check settings and try again”

Try the following to resolve the communication error on a serial Power Patrol:

 No RS-485 option available in the PC COM Port drop-down list—indicates the Power Patrol is not

properly connected or the required software driver is not installed.

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

Patrol—change the switch settings.

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

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

36

Meter Setup

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

60- is selectable.

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

37

ENTERING WIRING INFORMATION FOR AN ELEMENT

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

Use the following steps:

1) Select WYE or DELTA as the wiring connection.  A WYE connection automatically displays all three CTs. Any changes made to CT1 also apply to

CT2 and CT3.

Wye Wiring Connection

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

CT3.

Delta Wiring Connection

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

 *CT Phase—Select which phase to monitor  CT Type—Use the drop-down list to select the type of CT attached to the Power Patrol.  *CT Amps—Enter the amperage rating.  *CT Phase Shift—Enter in degrees the phase shift of the CT. The default is 1.1.

*Apply to MilliVolt CT not Rogowski Coils

38

3) Select a Digital Output from the drop-down list. See Pulse Output Port Function in the Appendix:

Other Functions for more information.

Comms. Setup

The Comms. Setup screen shows current communication protocol, BACnet or Modbus, as well as RS-485 settings (Data bits, Baud Rate), BACnet Device Settings (DeviceID, Max. Master, Max. Info Frames) and Ethernet settings (IP Address, Subnet Mask, Gateway Address, Modbus Port, BACnet Port)

Real-Time Values

39

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

Click Update to retrieve the values from the Power Patrol.

-or-

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

USING REAL-TIME VALUES TO VERIFY SETUP

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

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

40

Read/Write Registers—Read/Set Objects

DID YOU KNOW? Accumulated data is

The Read/Write Registers screen provides diagnostic and special configuration options, allowing the changing or viewing of the value of any Power Patrol register. Its use is not required for a basic setup.

1) Enter a register address. Refer to the Appendices, All Things Modbus or

BACnet Objects for a list of registers and their descriptions.

-or-

Click List to select a register from the Register Picker dialog box.

Use the Register Picker dialog box to search for registers/objects by name. The selected value is entered on the Read/Write Registers—Read/Set Objects screen.

2) Click Read to see the current value.

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

4) Click Write to change to the new value.

5) Click Clear Totals to clear accumulated data.

registers/objects with a time reference, such as time since reset, kWh, demands, etc.

41

RESETTING BACNET OBJECTS/MODBUS REGISTERS

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

To reset all BACnet accumulated objects at once:

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

To reset all Modbus accumulated registers at once:

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

In HeadStart, accumulating registers can be reset using the Read/Write tab.

 Click Clear Totals at the bottom of the screen.

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

SYNC REGISTERS

To freeze register readings, press Sync Registers. This will prevent any register from being update in HeadStart until the Sync Registers button is pushed again.

42

Firmware

The Firmware screen verifies the current firmware version and updates the Power Patrol internal firmware. Updating firmware is only supported in Modbus mode and via USB connection. See the appendix Firmware.

2) Click Show Version to see which version of firmware is currently loaded in meter. If a later version of

firmware is available, download it from the www.setra.com/powerpatrol

3) Click Browse to access the Select a Firmware Update File dialog box and select the .hex file

downloaded from the website.

4) Click Update to download the latest version.

-or-

Click Cancel Update to stop the download.

43

Data Scalar

Scalar Value

kW/kWh

Demand

kVAR/kVARh

kVA/kVAh

Power Factor

Amps

Volts

0

.00001

.01

.1

1

.001

.01

.1

.1 2 .01

.01

.1

.1 3 .1

.1

.01

.1

.1 4 1 1 1

.01 1 1

5

10

.01 1 1

≥6

100

.01 1 1

be less than 65,535.

ALL THINGS MODBUS

MODBUS DATA SCALING—INTERPRETING THE POWER PATROL REGISTERS

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

Table D-1: Data Scalars and Values for Registers 44001 thru 44061

The data scalar is stored in register 44602.

When selecting a data scalar, the following guidelines need to be considered:

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

removed.

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

register value X scalar value = actual value

Or, another way to state this formula is:

actual value/scalar value = register value

DID YOU KNOW: The register value must

44

CT Size or

Max. Current

3-phase Loads

230 volts

460 volts

50

Scalar 1

Scalar 2

100

Scalar 2

200

Scalar 2

400

Scalar 2

600

Scalar 2

Scalar 3

1000

Scalar 3

3000

Scalar 3

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. These are the minimum recommended scalar settings.

Table D-2: Data Scalar Selection

EXAMPLES USING A DATA SCALAR

The following examples use kW throughout.

For example 1, the following data is used:

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

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

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

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

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

For example 2, the following data is used:

480 volts x 1000 amps = 480,000 watts

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

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

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

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

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

1,440kW/.1 = 14,400

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

45

Modbus

Offset

Register

Description

40129

0128

Synchronize Register

Multiple Power Patrol’s synchronization register

44066

4065

Clear Accumulated Measurements

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

44525

4524

CT Type All

Writes same type for all CTs: 1=MilliVolt, 2=Rogowski

44526

4525

Slave ID

!1=SETRA, 1=Veris; Sets SLAVE_ID to Veris or SETRA

44599

4598

CT Phase Shift All

CT Phase Shift X 100 +/-

Writes same value to Registers 50199, 50299, & 50399

44600

4599

CT Integer All

Integer value of all CTs, Writes same value to Registers 50100, 50200, & 50300

44601

4600

CT Decimal All

Decimal value of all CTs, Writes same value to Registers 50100, 50200, & 50300

44602

4601

Data Scalar

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

44603

4602

Demand Window Size

Demand window size in minutes; default is 15 min

value.

VALUES REQUIRING TWO REGISTERS

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

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

1) Multiply the MSW register by 65536.

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

3) Multiply the result by the appropriate scalar value from Table I-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 44602 data scalar is set to 3.

To calculate the total kWh recorded:

Multiply the MSW by 65536: 13 X 65536 = 851968

Add the LSW: 851968 + 5013 = 856981

DID YOU KNOW? When reading two register values, HeadStart automatically

calculates the total

Multiply by the scalar 3 value of 0.1: 856981 X 0.1 = 85698.1 kWh

CONFIGURATION REGISTERS

46

Modbus

Offset

Register

Description

44604

4603

Volts Multiplier

Multiply volts values by this scalar. Use with Stepdown Transformer. Affects all parameters that use volts (i.e., kW)

44605

4604

Amps Multiplier

Multiply amps value by this scalar. For use with x:5A CTs and single let monitoring of a three phase load. Affects all parameters that use amps (i.e, kW)

44607

4606

Service Type

A value of 0x0001 configures the meter for DELTA

A value of 0x0000 configures the meter for WYE

44609

4608

Set Line Frequency

Line frequency setting for metering: 50=50 Hz, 60=60Hz

44612

4611

Communications Settings

Write 1833 to change to BACnet mode

50100

10099

CT1 Integer

Integer part of CT1

50101

10100

CT1 Decimal

Fractional part of NV_CT1

50125

10124

CT1 Type

Select 1=mV or 2=Rogowski CT1s

50199

10198

CT1 Phase Shift

Phase Shift X 100 +/-

50200

10199

CT2 Integer

Integer part of CT2

50201

10200

CT2 Decimal

Fractional part of NV_CT2

50225

10224

CT2 Type

Select 1=mV or 2=Rogowski CT2s

50299

10298

CT2 Phase Shift

Phase Shift X 100 +/-

50300

10299

CT3 Integer

Integer part of CT3

50301

10300

CT3 Decimal

Fractional part of NV_CT3

50325

10324

CT3 Type

Select 1=mV or 2=Rogowski CT3s

50399

10398

CT3 Phase Shift

Phase Shift X 100 +/-

Modbus

Offset

Register

Description

44402

4401

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

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

Register 45110 must = 0 to use

45110

5109

Digital Port 1 Configuration

Turns pulses on/off

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

open/closed switch

44001 = System kWh pulses

44008 = System kVARh pulses

PULSE OUTPUT/INPUT REGISTERS

47

Modbus

Offset

Register

Description

44011 = System kVAh pulses

45111

5110

Port 1 pulse output relay type

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

Modbus

Offset

Register

Description

* System=sum of three phases

44001

4000

kWh System LSW

System Total True Energy LSW (kWh)

44002

4001

kWh System MSW

System Total True Energy MSW (kWh)

44003

4002

kW System

System Total True Power (kW). Unsigned absolute (ABS) value of ABS (kW L1) + ABS (kW L2) + ABS (kW L3)

44004

4003

kW Demand System Max

System Maximum Demand (peak demand).

44005

4004

kW Demand System Now

Average Power (kW) for most recent demand window

44006

4005

kW System Max

System Maximum Instantaneous kW

(Highest kW sample measured)

44007

4006

kW System Min

System Minimum Instantaneous kW

(Lowest kW sample measured)

44008

4007

kVARh System LSW

System Total Reactive Energy LSW (kVARh)

44009

4008

kVARh System MSW

System Total Reactive Energy MSW (kVARh)

44010

4009

kVAR System

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

44011

4010

kVAh System LSW

System Total Apparent Energy LSW (kVAh)

44012

4011

kVAh System MSW

System Total Apparent Energy MSW (kVAh)

44013

4012

kVA System

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

44014

4013

Displacement PF System System Displacement Power Factor (PF). Register is

ABSOLUTE/NET VALUE MEASUREMENT REGISTERS

Offset refers to a base of 40001.

48

Modbus

Offset

Register

Description

* System=sum of three phases

100x actual value.

44015

4014

Apparent PF System

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

44016

4015

Amps System Avg

Average of all phases.

44017

4016

Volts Line to Line Avg

Voltage Line to line (Volts) Average.

44018

4017

Volts Line to Neutral Avg

Voltage Line to neutral (volts) Average.

44019

4018

Volts L1 to L2

Individual Phase to Phase Voltages

44020

4019

Volts L2 to L3

“

44021

4020

Volts L1 to L3

“

44022

4021

Line Frequency

Line Frequency (Hz)

44023

4022

kWh L1 LSW

Individual Phase True Energy LSW (kWh)

44024

4023

kWh L1 MSW

Individual Phase True Energy MSW (kWh)

44025

4024

kWh L2 LSW

“

44026

4025

kWh L2 MSW

“

44027

4026

kWh L3 LSW

“

44028

4027

kWh L3 MSW

“

44029

4028

kW L1

Individual Phase True Powers (kW)

44030

4029

kW L2

“

44031

4030

kW L3

“

44032

4031

kVARh L1 LSW

Individual Phase Reactive Energy LSW (kVARh)

44033

4032

kVARh L1 MSW

Individual Phase Reactive Energy MSW (kVARh)

44034

4033

kVARh L2 LSW

“

44035

4034

kVARh L2 MSW

“

49

Modbus

Offset

Register

Description

* System=sum of three phases

44036

4035

kVARh L3 LSW

“

44037

4036

kVARh L3 MSW

“

44038

4037

kVAR L1

Individual Phase Reactive Powers (kVAR)

44039

4038

kVAR L2

“

44040

4039

kVAR L3

“

44041

4040

kVAh L1 LSW

Individual Phase Apparent Energy LSW (kVAh)

44042

4041

kVAh L1 MSW

Individual Phase Apparent Energy MSW (kVAh)

44043

4042

kVAh L2 LSW

“

44044

4043

kVAh L2 MSW

“

44045

4044

kVAh L3 LSW

“

44046

4045

kVAh L3 MSW

“

44047

4046

kVA L1

Individual Phase Apparent Powers (kVA)

44048

4047

kVA L2

“

44049

4048

kVA L3

“

44050

4049

Displacement PF L1

Individual Phase displacement Power Factor (PF)

44051

4050

Displacement PF L2

“

44052

4051

Displacement PF L3

“

44053

4052

Apparent PF L1

Individual Phase apparent Power Factors (PF)

44054

4053

Apparent PF L2

“

44055

4054

Apparent PF L3

“

44056

4055

Amps L1

Individual Phase Currents (A)

44057

4056

Amps L2

“

44058

4057

Amps L3

“

50

Modbus

Offset

Register

Description

* System=sum of three phases

44059

4058

Volts L1 to Neutral

Individual Phase to Neutral Voltages (V)

44060

4059

Volts L2 to Neutral

“

44061

4060

Volts L3 to Neutral

“

44062

4061

Time Since Reset LSW

Seconds since KWH register was reset. LSW

44063

4062

Time Since Reset MSW

Seconds since KWH register was reset. MSW

44064

4063

Data Tick Counter

Internal sample count (gets cleared every minute): may be used to determine if sample read is a newer sample than last read.

44080

4079

kW System Average

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

44081

4080

kW Demand System Min

System Minimum Demand (kW)

44082

4081

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.

44083

4082

kVA Demand System Now

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

44084

4083

kVAR Demand System Max

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

51

Modbus

Offset

Register

Description

* System=sum of three phases

46001

6000

Positive kWh System LSW

System Positive True Energy LSW (kWh, resettable)

46002

6001

Positive kWh System MSW

System Positive True Energy MSW (kWh, resettable)

46003

6002

Positive kW System

System Positive Instantaneous Positive True Power (kW) (net sum of all individual kWs, if sum is negative value=0)

46004

6003

kW Demand System Max

System Maximum Demand (peak demand).

46005

6004

kW Demand System Now

Average Power (kW) for most recent demand window

46006

6005

Positive kW System Max

System Net Highest Instantaneous Positive Draw Since Reset (kW, resettable)

46007

6006

Positive kW System Min

System Net Lowest Instantaneous Positive Draw Since Reset (kW, resettable)

46008

6007

Positive kVARh System LSW

System Net Positive Reactive Energy LSW (kVARh, resettable)

46009

6008

Positive kVARh System MSW

System Net Positive Reactive Energy MSW (kVARh, resettable)

46010

6009

Positive kVAR System

System Net Instantaneous Positive Reactive Power (kVAR) (net sum of all individual kVARs, if sum is negative value=0)

46011

6010

kVAh System LSW

System Apparent Energy, LSW (resettable)

46012

6011

kVAh System MSW

System Apparent Energy, MSW (resettable)

46013

6012

kVA System

System Instantaneous Apparent Power

46014

6013

Positive Displacement PF System

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

POSITIVE POWER/ENERGY MEASUREMENT REGISTERS

52

Modbus

Offset

Register

Description

* System=sum of three phases

46015

6014

Positive Apparent PF System

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

46016

6015

Amps System Avg

Average of the current in all phases.

46017

6016

Volts Line to Line Avg

Average of the system line to line voltages.

46018

6017

Volts Line to Neutral Avg

Average of the system line to neutral voltages.

46019

6018

Volts L1 to L2

Individual phase to phase voltages.

46020

6019

Volts L2 to L3

“

46021

6020

Volts L3 to L1

“

46022

6021

Measured Line Frequency

Line frequency x 10 (e.g., 602 = 60.2 Hz). On startup, 20 point averaging array is filled with first frequency read.

46023

6022

Positive kWh L1 LSW

Individual Phase Positive True Energy LSW (kWh, resettable)

46024

6023

Positive kWh L1 MSW

Individual Phase Positive True Energy MSW (kWh, resettable)

46025

6024

Positive kWh L2 LSW

“

46026

6025

Positive kWh L2 MSW

“

46027

6026

Positive kWh L3 LSW

“

46028

6027

Positive kWh L3 MSW

“

53

Modbus

Offset

Register

Description

* System=sum of three phases

46029

6028

Positive kW L1

Individual Phase Instantaneous Positive True Powers (kW)

46030

6029

Positive kW L2

“

46031

6030

Positive kW L3

“

46032

6031

Positive kVARh L1 LSW

Individual Phase Positive Reactive Energy LSW (kVARh, resettable)

46033

6032

Positive kVARh L1 MSW

Individual Phase Positive Reactive Energy MSW (kVARh, resettable)

46034

6033

Positive kVARh L2 LSW

“

46035

6034

Positive kVARh L2 MSW

“

46036

6035

Positive kVARh L3 LSW

“

46037

6036

Positive kVARh L3 MSW

“

46038

6037

Positive kVAR L1

Individual Phase Positive Instantaneous Reactive Powers (kVAR)

46039

6038

Positive kVAR L2

“

46040

6039

Positive kVAR L3

“

46041

6040

kVAh L1 LSW

Individual Phase Apparent Energy LSW (kVAh, resettable)

46042

6041

kVAh L1 MSW

Individual Phase Apparent Energy MSW (kVAh, resettable)

46043

6042

kVAh L2 LSW

“

46044

6043

kVAh L2 MSW

“

46045

6044

kVAh L3 LSW

“

46046

6045

kVAh L3 MSW

“

46047

6046

kVA L1

Individual Phase Instantaneous Apparent Powers (kVA)

46048

6047

kVA L2

“

54

Modbus

Offset

Register

Description

* System=sum of three phases

46049

6048

kVA L3

“

46050

6049

Positive Displacement PF L1

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

46051

6050

Positive Displacement PF L2

“

46052

6051

Positive Displacement PF L3

“

46053

6052

Positive Apparent PF L1

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

46054

6053

Positive Apparent PF L2

“

46055

6054

Positive Apparent PF L3

“

46056

6055

Amps L1

Individual Phase Instantaneous Currents (A)

46057

6056

Amps L2

“

46058

6057

Amps L3

“

46059

6058

Volts L1 to Neutral

Individual Instantaneous Phase to Neutral Voltages (V)

46060

6059

Volts L2 to Neutral

“

46061

6060

Volts L3 to Neutral

“

46062

6061

Time Since Reset LSW (Seconds)

Seconds since kWh, kVAh, kVARh and associated Demand registers were reset. LSW (resettable)

46063

6062

Time Since Reset MSW (Seconds)

Seconds since CAM. MSW

46080

6079

Positive kW System Average

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

46081

6080

kW Demand System Minimum

Min Average power window (kW)

55

Modbus

Offset

Register

Description

* System=sum of three phases

46082

6081

kVA Demand System Maximum

Maximum Instantaneous kVA Demand (kW, resettable).

46083

6082

kVA Demand System Now

System Average kVA Demand for the most recent (current) Demand Window (resettable).

46084

6083

kVAR Demand System Max

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

Modbus

Offset

Register

Detailed Description

* System=sum of three phases

47001

7000

Negative kWh System LSW

System Negative True Energy LSW (kWh, resettable)

47002

7001

Negative kWh System MSW

System Negative True Energy MSW (kWh, resettable)

47003

7002

Negative kW System

System Negative Instantaneous Negative True Power (kW) (net sum of all individual kWs, if sum is positive value=0)

47004

7003

kW Demand System Max

System Maximum Demand (peak demand).

47005

7004

kW Demand System Now

Average Power (kW) for most recent demand window

47006

7005

Negative kW System Max

System Net Highest Instantaneous Negative Draw Since Reset (kW, resettable)

47007

7006

Negative kW System Min

System Net Lowest Instantaneous Negative Draw Since Reset (kW, resettable)

47008

7007

Negative kVARh System LSW

System Net Negative Reactive Energy LSW (kVARh, resettable)

47009

7008

Negative kVARh System MSW

System Net Negative Reactive Energy MSW (kVARh, resettable)

47010

7009

Negative kVAR System

System Net Instantaneous Negative Reactive Power (kVAR) (net sum of all individual kVARs, if sum is positive value=0)

NEGATIVE POWER/ENERGY MEASUREMENT REGISTERS

56

Modbus

Offset

Register

Detailed Description

* System=sum of three phases

47011

7010

kVAh System LSW

System Apparent Energy LSW (kVAh, resettable)

47012

7011

kVAh System MSW

System Apparent Energy MSW (kVAh, resettable)

47013

7012

kVA System

System Instantaneous Apparent Power (kVA)

47014

7013

Negative Displacement PF System

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

47015

7014

Negative Apparent PF System

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

47016

7015

Amps System Avg

Average of the current in all phases.

47017

7016

Volts Line to Line Avg

Average of the system line to line voltages.

47018

7017

Volts Line to Neutral Avg

Average of the system line to neutral voltages.

47019

7018

Volts L1 to L2

Individual phase to phase voltages.

47020

7019

Volts L2 to L3

“

47021

7020

Volts L3 to L1

“

47022

7021

Measured Line Frequency

Line frequency x 10 (e.g., 602 = 60.2 Hz). On startup, 20 point averaging array is filled with first frequency read.

57

Modbus

Offset

Register

Detailed Description

* System=sum of three phases

47023

7022

Negative kWh L1 LSW

Individual Phase Negative True Energy LSW (kWh, resettable)

47024

7023

Negative kWh L1 MSW

Individual Phase Negative True Energy MSW (kWh, resettable)

47025

7024

Negative kWh L2 LSW

“

47026

7025

Negative kWh L2 MSW

“

47027

7026

Negative kWh L3 LSW

“

47028

7027

Negative kWh L3 MSW

“

47029

7028

Negative kW L1

Individual Phase Instantaneous Negative True Powers (kW)

47030

7029

Negative kW L2

“

47031

7030

Negative kW L3

“

47032

7031

Negative kVARh L1 LSW

Individual Phase Negative Reactive Energy LSW (kVARh, resettable)

47033

7032

Negative kVARh L1 MSW

Individual Phase Negative Reactive Energy MSW (kVARh, resettable)

47034

7033

Negative kVARh L2 LSW

“

47035

7034

Negative kVARh L2 MSW

“

47036

7035

Negative kVARh L3 LSW

“

47037

7036

Negative kVARh L3 MSW

“

47038

7037

Negative kVAR L1

Individual Phase Negative Instantaneous Reactive Powers (kVAR)

47039

7038

Negative kVAR L2

“

47040

7039

Negative kVAR L3

“

47041

7040

kVAh L1 LSW

Individual Phase Apparent Energy LSW (kVAh, resettable)

58

Modbus

Offset

Register

Detailed Description

* System=sum of three phases

47042

7041

kVAh L1 MSW

Individual Phase Apparent Energy MSW (kVAh, resettable)

47043

7042

kVAh L2 LSW

“

47044

7043

kVAh L2 MSW

“

47045

7044

kVAh L3 LSW

“

47046

7045

kVAh L3 MSW

“

47047

7046

kVA L1

Individual Phase Instantaneous Apparent Powers (kVA)

47048

7047

kVA L2

“

47049

7048

kVA L3

“

47050

7049

Negative Displacement PF L1

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

47051

7050

Negative Displacement PF L2

“

47052

7051

Negative Displacement PF L3

“

47053

7052

Negative Apparent PF L1

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

47054

7053

Negative Apparent PF L2

“

47055

7054

Negative Apparent PF L3

“

47056

7055

Amps L1

Individual Phase Instantaneous Currents (A)

47057

7056

Amps L2

“

47058

7057

Amps L3

“

47059

7058

Volts L1 to Neutral

Individual Instantaneous Phase to Neutral Voltages (V)

47060

7059

Volts L2 to Neutral

“

59

Modbus

Offset

Register

Detailed Description

* System=sum of three phases

47061

7060

Volts L3 to Neutral

“

47062

7061

Time Since Reset LSW (Seconds)

Seconds since kWh, kVAh, kVARh and associated Demand registers were reset. LSW (resettable)

47063

7062

Time Since Reset MSW (Seconds)

Seconds since CAM. MSW

47080

7079

Negative kW System Average

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

47081

7080

kW Demand System Minimum

Min Average power window (kW)

47082

7081

kVA Demand System Maximum

Maximum Instantaneous kVA Demand (kW, resettable).

47083

7082

kVA Demand System Now

System Average kVA Demand for the most recent (current) Demand Window (resettable).

47084

7083

kVAR Demand System Max

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

60

Command Name

Command

Number (Hex)

Description

Read Holding Registers

03

Used to read the data values from the Power Patrol.

Write Single Register

06

Used to write a single holding register to a Power Patrol.

Report Slave ID

11

Used to read information from the Power Patrol.

Command Information

Command

Layout

Example

Command

Power Patrol address

nn

37

Command number

03

First register to read – high order bits

xx

00

First register to read – low order bits

xx

0C

Number of registers to read – high order bits

xx

00

Number of registers to read – low order bits

xx

01

CRC low order bits

xx

41

CRC high order bits

xx

9F

PROTOCOL COMMANDS

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

Table D-3: Supported Modbus Commands

The following guidelines are used for these Modbus commands:

 All values are hexadecimal/decimal, depending on your meter, spaces are not included.  The address is the value of the address switch on the Power Patrol. This must be different for

each Power Patrol on a single Modbus network.

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

be accessed for a read or write.

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

those for the registers and data.

Read Holding Registers

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

Table D-4: Format for Modbus Command 03

61

Example Request

Field Name

Command

(Hex)

Response

Field Name

Response

(Hex)

Power Patrol address

37

Power Patrol address

37

Command

03

Command

03

Starting register address to read– high order bits

00

Byte count

02

Starting register address to read– low order bits

0C

Register value –high order bits

00

Number of registers to read – high order bits

00

Register value – low order bits

00

Number of registers to read – low order bits

01

CRC low order bits

70

CRC low order bits

41

CRC high order bits

40

CRC high order bits

9F

DID YOU KNOW? The value sent as the

hexadecimal).

Example Command

This command reads from a Power Patrol 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.

Table D-5: Format for Modbus Command 03

Command: 3703000C0001419F

Response: 37030200007040

The response is from the Power Patrol at address 37. Two bytes were read from the requested register, 000C. The value of the registers read was 0000. The CRC value was 4070. The number of registers read must be between 1 and 125 inclusive.

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

62

Command Information

Command

Layout

Example

Command

Power Patrol address

nn

37

Command number

06

Register to write – high order bits

xx

00

Register to write – low order bits

xx

00

Register value to write – high order bits

xx

00

Register value to write – low order bits

xx

00

CRC low order bits

xx

8C

CRC high order bits

xx

5C

Example Request

Field Name

Command

(Hex)

Response

Field Name

Response

(Hex)

Power Patrol address

37

Power Patrol address

37

Command number

06

Command number

06

Register to write – high order bits

00

Register written to – high order bits

00

Register to write – low order bits

00

Register written to – low order bits

00

Register value to write – high order bits

00

Register value written – high order bits

00

Register value to write – low order bits

00

Register value written – low order bits

00

CRC low order bits

8C

CRC low order bits

8C

CRC high order bits

5C

CRC high order bits

5C

Write Single Register

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

Table D-6: Format for Modbus Command 06

Example Command

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

Table D-7: Format for Modbus Command 03

Command: 3706000000018C5C

Response: 3706000000018C5C

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

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

contents are written is a valid response.

63

Command Information

Command

Layout

Example

Command

Power Patrol address

nn

37

Command number

11

Example Request

Field Name

Command

(Hex)

Response

Field Name

Response

(Hex)

Power Patrol address

37

Power Patrol address

37

Command number

11

Command number

11

CRC low order bits

D7

Byte count

CRC high order bits

8C

Slave ID

Run indicator status

Additional data

Error Response

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

Report Slave ID

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

Table D-8: Format for Modbus Command 11 (17 in decimal)

Example Command

Table D-9: Format for Modbus Command 11 (17 in decimal)

Slave ID

The Power Patrol uses the following default format for the slave ID:

00hFFhSETRA Setra Systems Power Patrol 3, Serial Number, FW Rev Major Revision. Minor Revision, Scalar X

Example:

00hFFhSETRA Setra Systems Power Patrol 3, PS3912001, FW Rev 1.0, Scalar 3

The 00h is used for version control and the FFh indicates the meter is active. The 00h and FFh are two bytes in front of the string that are not displayed on the RTU.

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

64

Object

Identifier

Name

Description

10020

Data Acquisition Tick

Internal sample count (gets cleared every minute): may be used to determine if sample read is a newer sample than last read.

10140

Clear Accumulated Measurements

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

10190

Communications protocol

Used to change between BACnet and Modbus communications protocols.

12003

CT3 Phase Shift

CT3 phase shift (degrees)

12011

CT1 Value

12012

CT2 Value

12013

CT3 Value

12030

CT Pulse Scalar

Changes the scaling of the output pulses

12040

Demand Window

Demand window size in minutes; default is 15 min

12050

Volts Multiplier

Multiply volts values by this scalar. For use with stepdown transformer. Affects all parameters that use volts.

12061

CT1 Amps Multiplier

Multiply CT1 amps values by this scalar. For use with stepdown transformer. Affects all parameters that use amps.

12062

CT2 Amps Multiplier

Multiply CT2 amps values by this scalar. For use with stepdown transformer. Affects all parameters that use amps.

12063

CT3 Amps Multiplier

Multiply CT3 amps values by this scalar. For use with stepdown transformer. Affects all parameters that use amps.

12080

Service Type

A value of 1 configures the meter for Delta.

A value of 0 configures the meter for Wye.

12090

Line Frequency

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

12130

CT Type All

Writes same type for all CTs: 1=MilliVolt, 2=Rogowski

ALL THINGS BACNET

CONFIGURATION OBJECTS

65

Object

Identifier

Name

Description

12131

CT1 Type

1=MilliVolt, 2=Rogowski

12132

CT2 Type

1=MilliVolt, 2=Rogowski

12133

CT3 Type

1=MilliVolt, 2=Rogowski

Object

Identifier

Name

Description

13020

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

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

Object 13100 present value must = 0 to use

13100

Digital Port 1 Configuration

Turns pulses on/off

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

open/closed switch

44001 = System kWh pulses

44008 = System kVARh pulses

44011 = System kVAh pulses

13110

Port 1 pulse output relay type

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

Object

Identifier

Name

Description

* 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

Min Average power window (kW) (Unsigned/Absolute)

PULSE OUTPUT/INPUT OBJECTS

ABSOLUTE/NET VALUE MEASUREMENT OBJECTS

System=sum of three phases.

66

Object

Identifier

Name

Description

* System=sum of three phases

1030

kW System

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

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

1031

kW System Net

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

1060

kW System Average

Equals kWh System / (Time Since Reset /3600 seconds/Hr) (resettable)

1100

kW System Maximum

System Highest Instantaneous Draw Since Reset (kW)

1130

kW System Minimum

System Lowest Instantaneous Draw Since Reset (kW, resettable)

1160

kW L1

Individual Phase True Power (kW) (Signed)

1190

kW L2

“

1220

kW L3

“

2000

kWh System Total

System True Energy (kWh) (Unsigned/Absolute)

3000

Volts Line to Line Average

Voltage Line to line Average

3010

Volts Line to Neutral Average

Voltage Line to neutral Average

3020

Volts L1 to L2

Individual Phase to Phase Voltages

3030

Volts L2 to L3

“

3040

Volts L1 to L3

“

3050

Volts L1 to Neutral

Individual Phase to Neutral Voltages (V)

3060

Volts L2 to Neutral

“

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

“

67

Object

Identifier

Name

Description

* System=sum of three phases

5000

kVAR System

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

5001

kVAR System Net

System Total Reactive Power (kVAR). Signed net value of (kVAR L1) + (kVAR L2) + (kVAR L3)

5030

kVAR L1

Individual Phase Reactive Energy LSW (kVARh) (Signed)

5060

kVAR L2

“

5090

kVAR L3

“

5120

kVAR Demand System Max

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

5130

kVAR Demand System Now

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

6010

kVARh System

System Total Reactive Energy (Unsigned/Absolute)

7000

kVAh System Total

System Total Apparent Energy (Unsigned/Absolute)

8000

kVA System

System Total Apparent Power (kVA). Unsigned absolute (ABS) value of ABS (kVA L1) + ABS (kVA L2) + ABS (kVA L3)

8001

kVA System Net

System Net Apparent Power (kVA). Signed net value of (kVA L1) + (kVA L2) + (kVA L3)

8010

kVA L1

Individual Phase Apparent Powers (kVA) (signed)

8020

kVA L2

“Sign is set to the sign of the kW

8030

kVA L3

“

8040

kVA Demand System Max

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

68

Object

Identifier

Name

Description

* System=sum of three phases

8050

kVA Demand System Now

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

9000

Displacement PF System

System Total Power Factor (PF) (Signed)

9030

Apparent PF System

System Total Power Factor (PF) (Signed)

9060

Displacement PF L1

Individual Phase displacement Power Factor (PF)

9090

Displacement PF L2

“

9120

Displacement PF L3

“

9150

Apparent PF L1

Individual Phase apparent Power Factors (PF)

9180

Apparent PF L2

“

9210

Apparent PF L3

“

10000

Measured Line Frequency

Line Frequency (Hz)

10010

Time Since Reset

Seconds since accumulator registers were reset.

Object

Identifier

Name

Description

* 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

System Lowest Instantaneous Positive Draw Since Reset (kW, resettable)

2010

kWh System Total Positive

System True Energy (kWh) Positive (Signed Net)

2040

kWh L1 Positive Individual Phase True Energy (kWh) (Signed)

2070

kWh L2 Positive

“

2100

kWh L3 Positive

“

6010

kVARh System

System Total Reactive Energy (Signed Net)

POSITIVE POWER/ENERGY MEASUREMENT OBJECTS

69

Object

Identifier

Name

Description

* System=sum of three phases

6020

kVARh System Total Positive System True Energy (kVARh) Positive (Signed Net)

6050

kVARh L1 Positive Individual Phase Reactive Energy (kVAR) (Signed)

6080

kVARh L2 Positive

“

6110

kVARh L3 Positive

“

7001

kVAh System Total Positive

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

Accumulates only when kW is positive

7020

kVAh L1 Positive

Individual Phase Apparent Energy (kVAh) (Signed)

7050

kVAh L2 Positive

“

7080

kVAh L3 Positive

“

Object

Identifier

Name

Detailed Description

* 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, resettable)

2020

kWh System Total Negative

System True Energy (kWh) Negative (Signed Net)

2050

kWh L1 Negative

Individual Phase True Energy (kWh) (Signed)

2080

kWh L2 Negative

“

2110

kWh L3 Negative

“

6030

kVARh Sys Negative

System Total Reactive Energy (Signed Net)

6060

kVARh L1 Negative

Individual Phase Reactive Energy (kVARh) (Signed)

6090

kVARh L2 Negative

“

6120

kVARh L3 Negative

“

7002

kVAh System Total Negative

System Total Negative Apparent Energy (Signed Net)

7030

kVAh L1 Negative

Individual Phase Apparent Energy (kVAh) (Signed)

7060

kVAh L2 Negative

“

7090

kVAh L3 Negative

“

NEGATIVE POWER/ENERGY MEASUREMENT OBJECTS

69

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.

CAUTION: THE POWER PATROL METER SHOULD ONLY BE WIRED BY QUALIFIED PERSONNEL. HAZARDOUS VOLTAGES EXIST.

ATTENTION: LE POWER PATROL ne doit être branché QUE par un personnel qualifié. TENSIONS DANGEREUSES sont présentEs.

DANGER! THE UNENCLOSED POWER PATROL 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 IMPRIMES SANS COUVERCLE EXIGE UN REDOUBLEMENT DE PRUDENCE QUAND ON FAIT LA CONNEXION. LES TENSIONS DEPASSANT 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 ETRE SOUS-ESTIME.

APPENDICES

Appendix A—Power Patrol Meter Wiring Diagrams

Typically, the Power Patrol can be wired using any one of the following common wiring setups. These diagrams will assist you in properly connecting your Power Patrol meter for the setup desired. ALL WIRE COLORS ARE U.S. STANDARD.

70

POWER PATROL PLUS WIRING DIAGRAMS

Figure A-1: Three-wire Delta

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

71

Figure A-2: Two-wire Single Phase

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

Figure A-3: Three-wire Single Phase

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

72

Figure A-4: 3-Phase, 4-Wire Delta

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

73

Appendix B—Connecting to a Network

This section describes setting up a network with multiple Power Patrol instruments using the BACnet or Modbus communication protocol. A network can support up to 127 Power Patrol instruments using the BACnet protocol and 247 Power Patrol instruments using the Modbus protocol.

COMMUNICATION PROTOCOL

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

DAISY CHAIN LAYOUT FOR RS-485 NETWORK

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

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

Other network layouts are not recommended when using the RS-485 standard.

NETWORKING USING THE BACNET/MODBUS PROTOCOL

1) Install the BACnet/Modbus cable.

2) Set a unique address for each device using the table in Appendix C.

74

Data Scalar

Pulse Scalar Value

kWh

kVAh

kVARh

0

.00001

1

.001

2

.01

.01 3 .1

.1

4

1 1 1

5

10

≥6

100

Appendix C—Digital I/O Functions

DIGITAL PULSE OUTPUTS

There is one configurable digital pulse output port on the SPP. The ports can be used to output kWh, kVARh, or kVAh pulses to external devices, or to toggle on and off to control a remote device or relay.

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 Power Patrol 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 orange LEDs will briefly flash, otherwise they will remain dark.

The BACnet pulse output 12030 is scaled by the same data scalar as the Modbus register (44602). For example, when the data scalar is set to 3, each pulse will represent .1 kWh, .1kVAh and .1kVARh.

Table C-1: Pulse Scalar Values

For system pulse output:

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

75

Modbus Register

Offset

Register Name

Detailed Description

44402

4401/5301

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

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

Register 45110 must = 0 to use

45110

5109/5309

Digital Port 1 Configuration

Turns pulses on/off

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

open/closed switch

44001 = System kWh pulses

44008 = System kVARh pulses

44011 = System kVAh pulses

45111

5110/5310

Port 1 pulse output relay type

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

SPP

Object

Identifier

Name

Detailed Description

13020

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

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

Object 13100 present value must = 0 to use

13100

Digital Port 1 Configuration

Turns pulses on/off

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

open/closed switch

44001 = System kWh pulses

44008 = System kVARh pulses

44011 = System kVAh pulses

13110

Port 1 pulse output relay type

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

Modbus Output Port Registers

Refer to the following two tables to configure the Power Patrol output ports when using the Modbus protocol.

Table C-2: Modbus Digital Port Pulse Output

BACnet Output Port Objects

Refer to the following two tables to configure the Power Patrol output ports when using the BACnet protocol.

Table C-3: BACnet Digital Port 1 Pulse Output

76

CT Amperage Rating

Veris Model Number

CT ≤ 100A

Veris Type = H8036-0100-2

CT Value = 100A

100A < CT ≤ 300A

Veris Type = H8036-0300-2

CT Value = 300A

300A < CT ≤ 400A

Veris Type = H8036-0400-3

CT Value = 400A

400A < CT ≤ 800A

Veris Type = H8036-0800-3

CT Value = 800A

800A < CT ≤ 1600A

Veris Type = H8036-1600-4

CT Value = 1600A

CT >1600A

Veris Type = H8036-2400-4

CT Value = 2400A

Appendix D—VERIS H8035/H8036 Emulation

The Power Patrol 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 Power Patrol meter simple. However, because the number of parameters that the Veris meters measure is less than half of what the Power Patrol can measure, the other Modbus registers described in the table need to be used to utilize the additional capabilities of the Power Patrol.

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

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

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

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

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

Example command explanation:

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

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

Table D-1: CT Amp Rating to Veris Models

77

Modbus Register

Offset

HeadStart Name

Description

40001

0

kWh System LSW

System True Energy (kWh, Resettable)

40002

1

kWh System MSW

System True Energy (kWh, Resettable)

40003

2

kW System

System True Power (kW)

40004

3

kVAR System

System Reactive Power (kVAR)

40005

4

kVA System

System Apparent Power (kVA)

40006

5

Apparent PF System

System Apparent Power Factor (PF)

40007

6

Volts Line to Line Avg

Average Line to Line Voltage

40008

7

Volts Line to Neutral Avg

Average Line to Neutral Voltage

40009

8

Amps System Avg

Average current of all phases

40010

9

kW L1

Individual Phase True Powers (kW, 3 values)

40011

10

kW L2

"

40012

11

kW L3

"

40013

12

Apparent PF L1

Individual Phase Apparent Power Factors (PF, 3 values)

40014

13

Apparent PF L2

"

40015

14

Apparent PF L3

"

40016

15

Volts L1 to L2

Individual Phase to Phase Voltages (Volts, Delta, 3 values)

40017

16

Volts L2 to L3

"

40018

17

Volts L1 to L3

"

40019

18

Volts L1 to Neutral

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

40020

19

Volts L2 to Neutral

"

40021

20

Volts L3 to Neutral

"

40022

21

Amps L1

Individual Phase Currents (Amps, 3 values)

VERIS MODBUS INTEGER REGISTERS

78

Modbus Register

Offset

HeadStart Name

Description

40023

22

Amps L2

"

40024

23

Amps L3

"

40025

24

kW System Avg

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

40026

25

kW Demand System Min

System Minimum Demand (kW, 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.

40027

26

kW Demand System Max

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

Address

Units

≤ 100A

101 – 400A

401 – 800A

801 – 1600A

1601 – 32,000A

40001

kWH LSB

7.8125exp-3

0.03125

0.0625

0.125

0.25

40002

kWH MSB

512

2048

4096

8192

16384

40003

kW

0.004

0.016

0.032

0.064

0.128

40004

kVAR

0.004

0.016

0.032

0.064

0.128

40005

kVA

0.004

0.016

0.032

0.064

0.128

40006

aPF

3.0518exp-5

40007

VOLTS L-L

0.03125

40008

VOLTS L-L

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

VERIS MULTIPLIERS

Table D-2: HeadStart Register Descriptions

79

Address

Units

≤ 100A

101 – 400A

401 – 800A

801 – 1600A

1601 – 32,000A

40014

aPF L2

3.0518exp-5

40015

aPF L3

3.0518exp-5

40016

VOLTS L1-L2

0.03125

40017

VOLTS L2-L3

0.03125

40018

VOLTS L3-L1

0.03125

40019

VOLTS L1-N

0.015625

40020

VOLTS L2- N

0.015625

40021

VOLTS L3- N

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

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

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

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

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

80

Modbus Register

Offset

Viewpoint Name

Description

40257

256

VERIS Float kWh System MSW

System Net True Energy (kWh, Resettable)

40258

257

VERIS Float kWh System LSW

System Net True Energy (kWh, Resettable)

40261

260

VERIS Float kW System MSW

System Total True Power MSW

40262

261

VERIS Float kW System LSW

System Total True Power LSW

40263

262

VERIS Float kVAR System MSW

System Total Reactive Power MSW

40264

263

VERIS Float kVAR System LSW

System Total Reactive Power LSW

40265

264

VERIS Float kVA System MSW

System Total Apparent Power MSW

40266

265

VERIS Float kVA System LSW

System Total Apparent Power LSW

40267

266

VERIS Float PF System MSW

System Total Power Factor MSW

40268

267

VERIS Float PF System LSW

System Total Power Factor LSW

40269

268

VERIS Float Volts Line to Line Avg MSW

Voltage Line to Line Average MSW

40270

269

VERIS Float Volts Line to Line Avg LSW

Voltage Line to Line Average LSW

40271

270

VERIS Float Volts Line to Neutral Avg MSW

Voltage Line to Neutral Average MSW

40272

271

VERIS Float Volts Line to Neutral Avg LSW

Voltage Line to Neutral Average LSW

40273

272

VERIS Float Amps System Avg MSW

Total Current in all Phases MSW

40274

273

VERIS Float Amps System Avg LSW

Total Current in all Phases LSW

40275

274

VERIS Float kW L1 MSW

Individual Phase True Power L1 MSW

40276

275

VERIS Float kW L1 LSW

Individual Phase True Power L1 LSW

40277

276

VERIS Float kW L2 MSW

Individual Phase True Power L2 MSW

40278

277

VERIS Float kW L2 LSW

Individual Phase True Power L2 LSW

40279

278

VERIS Float kW L3 MSW

Individual Phase True Power L3 MSW

VERIS MODBUS FLOATING POINT REGISTERS

81

Modbus Register

Offset

Viewpoint Name

Description

40280

279

VERIS Float kW L3 LSW

Individual Phase True Power L3 LSW

40281

280

VERIS Float Apparent PF L1 MSW

Individual Phase Apparent Power Factor L1 MSW

40282

281

VERIS Float Apparent PF L1 LSW

Individual Phase Apparent Power Factor L1 LSW

40283

282

VERIS Float Apparent PF L2 MSW

Individual Phase Apparent Power Factor L2 MSW

40284

283

VERIS Float Apparent PF L2 LSW

Individual Phase Apparent Power Factor L2 LSW

40285

284

VERIS Float Apparent PF L3 MSW

Individual Phase Apparent Power Factor L3 MSW

40286

285

VERIS Float Apparent PF L3 LSW

Individual Phase Apparent Power Factor L3 LSW

40287

286

VERIS Float Volts L1 to L2 MSW

Phase to Phase Voltage L1 to L2 MSW

40288

287

VERIS Float Volts L1 to L2 LSW

Phase to Phase Voltage L1 to L2 LSW

40289

288

VERIS Float Volts L2 to L3 MSW

Phase to Phase Voltage L2 to L3 MSW

40290

289

VERIS Float Volts L2 to L3 LSW

Phase to Phase Voltage L2 to L3 LSW

40291

290

VERIS Float Volts L1 to L3 MSW

Phase to Phase Voltage L1 to L3 MSW

40292

291

VERIS Float Volts L1 to L3 LSW

Phase to Phase Voltage L1 to L3 LSW

40293

292

VERIS Float Volts L1 to Neutral MSW

Phase to Neutral Voltage L1 to N MSW

40294

293

VERIS Float Volts L1 to Neutral LSW

Phase to Neutral Voltage L1 to N LSW

40295

294

VERIS Float Volts L2 to Neutral MSW

Phase to Neutral Voltage L2 to N MSW

40296

295

VERIS Float Volts L2 to Neutral LSW

Phase to Neutral Voltage L2 to N LSW

40297

296

VERIS Float Volts L3 to Neutral MSW

Phase to Neutral Voltage L3 to N MSW

40298

297

VERIS Float Volts L3 to Neutral LSW

Phase to Neutral Voltage L3 to N LSW

40299

298

VERIS Float Amps L1 MSW

Phase Current L1 MSW

40300

299

VERIS Float Amps L1 LSW

Phase Current L1 LSW

40301

300

VERIS Float Amps L2 MSW

Phase Current L2 MSW

40302

301

VERIS Float Amps L2 LSW

Phase Current L2 LSW

82

Modbus Register

Offset

Viewpoint Name

Description

40303

302

VERIS Float Amps L3 MSW

Phase Current L3 MSW

40304

303

VERIS Float Amps L3 LSW

Phase Current L3 LSW

40305

304

VERIS Float kW System Avg MSW

System Average Power MSW

40306

305

VERIS Float kW System Avg LSW

System Average Power LSW

40307

306

VERIS Float Demand System Minimum MSW

System Minimum Demand MSW

40308

307

VERIS Float Demand System Minimum LSW

System Minimum Demand LSW

40309

308

VERIS Float Demand System Maximum MSW

System Maximum Demand MSW

40310

309

VERIS Float Demand System Maximum LSW

System Maximum Demand LSW

83

Decimal

Hex

Decimal

Hex

Decimal

Hex

Decimal

Hex

Decimal

Hex

Decimal

Hex

1

01

44

2C

87

57

130

82

173

AD

216

D8 2 02

45

2D

88

58

131

83

174

AE

217

D9

3

03

46

2E

89

59

132

84

175

AF

218

DA 4 04

47

2F

90

5A

133

85

176

B0

219

DB

5

05

48

30

91

5B

134

86

177

B1

220

DC

6

06

49

31

92

5C

135

87

178

B2

221

DD 7 07

50

32

93

5D

136

88

179

B3

222

DE

8

08

51

33

94

5E

137

89

180

B4

223

DF 9 09

52

34

95

5F

138

8A

181

B5

224

E0

10

0A

53

35

96

60

139

8B

182

B6

225

E1

11

0B

54

36

97

61

140

8C

183

B7

226

E2

12

0C

55

37

98

62

141

8D

184

B8

227

E3

13

0D

56

38

99

63

142

8E

185

B9

228

E4

14

0E

57

39

100

64

143

8F

186

BA

229

E5

15

0F

58

3A

101

65

144

90

187

BB

230

E6

16

10

59

3B

102

66

145

91

188

BC

231

E7

17

11

60

3C

103

67

146

92

189

BD

232

E8

18

12

61

3D

104

68

147

93

190

BE

233

E9

19

13

62

3E

105

69

148

94

191

BF

234

EA

20

14

63

3F

106

6A

149

95

192

C0

235

EB

21

15

64

40

107

6B

150

96

193

C1

236

EC

22

16

65

41

108

6C

151

97

194

C2

237

ED

23

17

66

42

109

6D

152

98

195

C3

238

EE

24

18

67

43

110

6E

153

99

196

C4

239

EF

25

19

68

44

111

6F

154

9A

197

C5

240

F0

26

1A

69

45

112

70

155

9B

198

C6

241

F1

27

1B

70

46

113

71

156

9C

199

C7

242

F2

28

1C

71

47

114

72

157

9D

200

C8

243

F3

29

1D

72

48

115

73

158

9E

201

C9

244

F4

Appendix E—Conversion Table

DECIMAL TO HEXADECIMAL CONVERSION TABLE

Decimal values are used for the Power Patrol 24 addresses. The table below shows the corresponding hex values.

84

Decimal

Hex

Decimal

Hex

Decimal

Hex

Decimal

Hex

Decimal

Hex

Decimal

Hex

30

1E

73

49

116

74

159

9F

202

CA

245

F5

31

1F

74

4A

117

75

160

A0

203

CB

246

F6

32

20

75

4B

118

76

161

A1

204

CC

247

F7

33

21

76

4C

119

77

162

A2

205

CD

248

F8

34

22

77

4D

120

78

163

A3

206

CE

249

F9

35

23

78

4E

121

79

164

A4

207

CF

250

FA

36

24

79

4F

122

7A

165

A5

208

D0

251

FB

37

25

80

50

123

7B

166

A6

209

D1

252

FC

38

26

81

51

124

7C

167

A7

210

D2

253

FD

39

27

82

52

125

7D

168

A8

211

D3

254

FE

40

28

83

53

126

7E

169

A9

212

D4

255

---

41

29

84

54

127

7F

170

AA

213

D5

42

2A

85

55

128

80

171

AB

214

D6

43

2B

86

56

129

81

172

AC

215

D7

Table E-1: Decimal to Hexadecimal Conversion Table

85

Appendix F—Troubleshooting

TROUBLESHOOTING COMMUNICATION ISSUES

When the baud rate on the HeadStart Communications screen and the Power Patrol do not match, communication fails, the Status box displays the following message: “Unable to establish connection with meter, please check settings and try again”

The following headings provide possible solutions for communication errors.

Baud Rate Communications Error (RS-485 Serial Communication)

To correct a baud rate communications error, use the following steps:

1) In HeadStart, set the Modbus Base Address Switches field to 00.

2) Set the address switches to 00,

3) Power up the meter. With both settings at 00, HeadStart and the Power Patrol will communicate at

a 9600 baud rate regardless of a baud rate mismatch. Communications is established.

4) Next, select the desired baud rate in HeadStart from the Baud Rate drop-down list. This

synchronizes the baud rates between HeadStart and the Power Patrol.

5) Click Connect in HeadStart to reconfirm communications.

Port Error

If the PC COM Port drop-down list does not contain a RS-485 COM port, the RS-485 adapter driver is not installed or the device is not connected to the computer’s USB port. Check that the adapter is connected to a live USB port or move the USB cable to another USB port.

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.

 Verify that the dip switches on the back of the USB to RS-485 adapter are set to the following:

 Reboot the computer. Click Connect on the Communications tab to reestablish communications.

87

FREQUENTLY ASKED QUESTIONS

What is the maximum distance for BACnet MS/TP or Modbus (RS-485) communication?

BACnet MS/TP or Modbus (RS-485) can reach a distance up to 1200 meters (4000’) with data rates at 100 kbps.

One (or more) of the Phase Verification LEDs is red. What does this mean?

Any number of red lights indicates the Power Patrol meter is wired incorrectly. Review the table in Phase Verification in Section III of this manual for a description of the indicator lights.

How is the Power Patrol meter powered?

All Power Patrol instrument is line-powered or via USB connection before installation. An internal power supply attached between L1 and L2 provides power to the unit.

Can the Power Patrol be used to monitor single-phase loads?

The Power Patrol meter can be used to monitor single-phase loads. Refer to Section II or III for detailed setup information.

How many Power Patrol instruments can be connected together?

Up to 127 Power Patrol meter can be connected together on a BACnet MS/TP network.

Up to 247 Power Patrol meter can be connected together on a Modbus network.

How is hexadecimal (HEX) to decimal converted?

Use the Decimal to Hexadecimal conversion table in Appendix A of this manual.

What is true RMS?

RMS stands for "Root-Mean-Square." True RMS is the power from AC voltage/current that will produce the equivalent amount of heat in a resistor as a DC voltage/current, whether sinusoidal or not. For example, if a resistive heating element is rated at 15 kW of heat at 240VAC RMS, then the heat would be the same if we applied 240V of DC instead of AC. A meter without true RMS will incorrectly read distorted waveforms. All Setra Systems meters measure true RMS.

How accurate is the Power Patrol meter?

The Power Patrol meter accuracy is 0.2% (meter only)

Can a three-phase balanced load be monitored with one CT?

This is not the best way to measure a three-phase load as it ignores imbalances in voltage and power factor. However, if desired there is an Amp Multiplier Modbus register (44605) that can be set for three (3), which will multiply the current by three and therefore amps, watts, VA, VARs will be 3X greater.

88

How can I switch the Power Patrol from BACnet to Modbus mode?

Using a PC running HeadStart, go to Comms. Setup tab and select desired communication protocol.

How can I switch the Power Patrol from Modbus to BACnet mode?

Using a PC running HeadStart, go to Comms. Setup tab and select desired communication protocol.

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 HeadStart software.

What is the purpose of setting a scalar value?

Each Modbus register is only 16 bits wide and is in integer format without any fixed number of decimal points. Simply putting a value directly into one of these registers would limit the smallest number to 1, and only allow for a maximum value of 65535. To handle larger numbers, or numbers with better resolution, we use a scalar value to apply a factor in multiples of 10 to the 16 bit data register value.

89

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 Power Patrol, Analog Value objects are used to represent the electrical measurements.

BACnet

Building Automation Control networks. A communications protocol that allows

building automation and control devices and their associated properties (objects) to be automatically discovered.

CAM

Clear All Measurements

Data Scalar

A scalar is used to multiply the raw data value to convert information read from the Modbus registers. Refer to Table IV-3 for a list of values. Example: if the scalar value in register 44602 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

Demand Window

The Demand Window is how long the meter calculates your demand for recording a value. For example if your Demand Window is set to 15 min, the meter will calculate your total demand every minute for 15 minutes. At the end of the 15 minutes it will sum all 15 values. Then it will record that value as the demand.

Digital Output

The Power Patrol meter has an output port for each element. The ports can be used to output kWh, kVARh,or kVAh pulses to external devices, or to toggle on and off to control a remote device or relay.

Discovery

In BACnet devices and the objects they expose can be found through a discovery process. This means that devices and objects do not need to be manually added if a BACnet client supports discovery.

Falling edge

Transition of the input signal from high to low.

Hexadecimal

In mathematics and computer science, hexadecimal (or hex) is a numeral system with a radix, or base, of 16. It uses sixteen distinct symbols, most often the symbols 0–9 to represent values zero to nine, and A, B, C, D, E, F (or a through f) to represent values ten to fifteen.

kVAh

Kilovolt-Ampere Hour

kVARh

Kilovolt Ampere Reactive Hours

kWh

Kilowatt Hour

LSW

(Modbus mode only) Least Significant Word. Unit of data with the low-order bytes

at the right.

MS/TP

Master-Slave/Token Passing is a model of communication used by BACnet where one device (the master node) has unidirectional control of the RS-485 serial bus. The token is passed from master node to master node to allow a master node to send frames over the bus.

MSW

(Modbus mode only) Most Significant Word. Unit of data with the high-order bytes

at the left.

Net

When a register/object has the word “net” in its description than net equals the sum

GLOSSARY

90

of all individual signed measurements.

Object

A BACnet object is a standard data structure that on the Power Patrol represents electrical measurements.

Power Factor

The power factor of the AC electric power system is defined as the ratio of the real power flowing to the load to the apparent power, and is a number between 0 and 1 (frequently expressed as a percentage, e.g., 0.5 pf = 50% pf). Real power is the capacity of the circuit for performing work in a particular time. Apparent power is the product of the root mean squared current and root mean squared voltage of the circuit. Due to energy stored in the load and returned to the source, or due to a nonlinear load that distorts the wave shape of the current drawn from the source, the apparent power can be greater than the real power.

Pulse Input

Used for counting, accumulating, and scaling pulses received from non-DENT external pulse initiating meters such as gas, water, or other electrical meters.

Pulse Output

Pulse output is used to generate pulses for external devices such as data loggers that can accept pulses but do not have Modbus capability. The Power Patrol can generate pulses based on accumulated value(s) such as system kWh, system kVARh, and system kVAh.

Rising edge

Transition of the input signal from low to high.

RMS

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 Setra Systems 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.

RTU

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. It generally refers to an industrial control system: a computer system monitoring and controlling a process.

Service

A BACnet service are messages to which the Power Patrol must respond and end. In BACnet these include WhoIs, I-Am, and ReadProperty.

Volts Multiplier

A multiplier that changes voltage so that a meter can read measurements higher than 600V.

Setra Power Patrol Operating Manual

Specifications and Main Features

Frequently Asked Questions

User Manual