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Siemens MD-BMS User Manual

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MD-BMS and MD-BMED Power
Meters
User Guide
125-202
06/06/2017
Building Technologies
125-202, Rev.CA

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Summary of Contents for Siemens MD-BMS

  • Page 1 MD-BMS and MD-BMED Power Meters User Guide Building Technologies 125-202 06/06/2017 125-202, Rev.CA...
  • Page 2 Copyright Notice Notice Document information is subject to change without notice by Siemens Industry, Inc. Companies, names, and various data used in examples are fictitious unless otherwise noted. No part of this document may be reproduced or transmitted in any form or by any means, electronic or mechanical, for any purpose, without the express written permission of Siemens Industry, Inc.

  • Page 3: Table Of Contents

    Switching Between BACnet and Modbus Mode............37 Installation .........................40 Mounting the MD-BMS and MD-BMED Power Meters............ 40 Wiring Connections on the MD-BMS and MD-BMED Power Meters ....... 41 Completing the Installation..................... 42 Using the Digital Pulse Output Port Function..............42 Modbus Output Port Registers..................
  • Page 4 Real-Time Values ......................59 Read/Write Registers – Read/Set Objects..............61 Firmware ........................63 Appendices ....................... 65 Appendix A - MD-BMS and MD-BMED Power Meters BACnet Analog Value Objects..65 Configuration Objects (10020 - 13000) ..............69 Pulse Output/Input Objects ..................71 Device Status Objects ....................71 Positive Power/Energy Accumulator Objects..............71...

  • Page 5: Introduction

    They are used for long-term monitoring of electrical systems. Up to 100 MD-BMS and MD-BMED serial meters can be connected to a single BACnet MS/TP network for monitoring and recording power usage at multiple locations within a single site.
  • Page 6 Meter with display and Ethernet, and three 4000A, 16” Rogowski Coil CTs with 5” diameter windows MD- BMED-3-RC-36 Meter with display and Ethernet, and three 4000A, 36” Rogowski Coil CTs with 10” diameter windows MD-BMS Power Meter Bundled Kits; Revenue Grade MD-BMS-3-RGCT-50A Meter with three 50A, split-core current transformers with 0.5” windows MD-BMS-3-RGCT-100A Meter with three 100A, split-core current transformers with 1.25”...
  • Page 7 Introduction Product Description Current Transformers (CTs), Split Core Models, Quantity 1 SCT-SCL-1000-U 1000-Amp, Large Split Core CT with 2“ window Current Transformers (CTs), Rogowski Coil Models, Quantity 1 SCT-R16-A4-U 4000-Amp, Rogowski Coil, 16“ wit 4.5“ window (used in MD-BM*-3RC-16 meter kits) SCT-R24-A4-U 4000-Amp, Rogowski Coil, 24“...

  • Page 8: Certificate Of Calibration

    Save these documents in a safe place when not in use. Warranty Siemens has reset the five-year warranty date start to October 1, 2016, which will provide extended warranty coverage to currently installed MD Power Meters through September 30, 2021, for all units prior to Rev. G. Rev. G units. Newer units will carry the standard warranty.

  • Page 9: Meter Anatomy

    Safety Summary and Specifications This general safety information must be used by both the Logger operator and servicing personnel. Siemens Industry, Inc. assumes no liability for user’s failure to comply with these safety guidelines. The MD-BMS and MD-BMED Power Meters are Over-Voltage Category III devices.
  • Page 10 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 MD-BMS and MD-BMED Power Meters are 600 Volt Over Voltage Category III devices.

  • Page 11: Sommaire Des Informations De Sécurité

    Do not use other CTs. Only use shunted CTs with a 333 mV maximum output. Serious shock hazard and logger damage can occur if unshunted CTs are used. The UL listing covers the use of the following Siemens CTs that are UL Recognized and have been evaluated to IEC 61010-1: SCT-HSC-0050-U (50A Mini), SCT-HMC-0100- U (100A Midi), SCT-HMC-0200-U (200A Midi), SCT-RXX-A4-U (Rogowski Coil), SCT-SRS-xxx, SCT-SRL-xxx, and SCT-RGT12-xxx.
  • Page 12 Introduction Safety Summary and Specifications Symboles sur l’appareil CAUTION Signifie prudence. Le dommage d'équipement ou la perte de données peuvent se produire si vous ne suivez pas de procédure comme spécifié. WARNING Indique une haute tension. Risque de choc électrique. Des tensions mettant en danger la vie des personnes peuvent être présentes.
  • Page 13 à l'enregistreur peuvent se produire si des transformateurs de tensions non shuntés sont utilisés. La certification UL couvre l’utilisation des transformateurs de tension de Siemens agréés UL et évalués sous IEC 61010-1 suivants : SCT‐HSC‐0050‐U, SCT‐HMC‐0100‐U, SCT‐HMC‐0200‐U, andSCT-RXX-A4-U.

  • Page 14: Md-Bms And Md-Bmed Technical Specifications

    Introduction Safety Summary and Specifications MD-BMS and MD-BMED Technical Specifications Specification Description Service Types Single Phase, Three Phase-Four Wire (WYE), Three Phase-Three Wire (Delta) 3 Voltage Channels 80 to 346 Volts AC Line-to-Neutral, 600V Line-to-Line, CAT III Current Channels 3 channels, 0.525 Vac maximum, 333 mV CTs to maintain accuracy.
  • Page 15 Introduction Maintenance Communication RS 485 Transceiver unit load 1/8 Load unit size Loading Data Formats BACnet Master Slave/Token Passing (MS/TP) protocol (default) or Modbus RTU protocol. The MD-BMED Model adds Ethernet with BACnet IP or Modbus TCP. Mechanical Operating Temperature -20°F to 140°F (-7°C to 60°C) Humidity 5% to 95% non-condensing...

  • Page 16: Maintenance

    There is no required maintenance with the MD-BMS or MD-BMED Power Meters CAUTION Do not use cleaning agents of any kind (including water) on the MD-BMS or MD- BMED Power Meters. Only accessories specified in Siemens product literature or price sheets are approved for use with MD-BMS or MD-BMED Power Meters.

  • Page 17: Prepping For Installation

    The Siemens MD-BMS and MD-BMED metering kits are provided with a meter and three current transformers with the meter factory-configured for the ordered CTs. No additional setup in the field should be required when using the MD-BMS and MD- BMED metering kits. If the meters and current transformers are ordered individually, field configuration is required.

  • Page 18: Installing The Viewpoint Software

    Installing the ViewPoint Software Installing the ViewPoint Software The ViewPoint software is designed to let you easily configure the MD-BMS and MD- BMED power meters for different current transformers, check readings, and verify correct setup. All of Siemens MD-BMS and MD-BMED meters use ViewPoint software to communicate with the meters;...

  • Page 19: Connecting A Communication Cable

    Connecting a Communication Cable Connecting a Communication Cable There are various ways to communicate with an MD-BMS or MD-BMED meter; and your choice will determine what type of cabling system to use. To set up the meter, communication can be established with a USB cable, an RS-485 adapter, or an Ethernet cable (MD-BMED only).
  • Page 20 IP address is required. The screen display changes based on your connection selection. The USB connector on the MD-BMS or MD-BMED power meters can be used to power the unit when configuring it using ViewPoint and either BACnet or Modbus protocols.
  • Page 21 Prepping for Installation Connecting a Communication Cable Installing the RS-485 Adapter to a Computer NOTE: If ViewPoint was installed first, it m be restarted following an RS-485 Driver installation. If an RS-485 port does not appear in the drop–down list, the RS-485 was not installed correctly.
  • Page 22 Echo Off, 2 Wire, 2 Wire as shown below before plugging into the adapter into the MD-BMS and MD-BMED. Figure 3: DIP Switches on Back of RS-485 Adapter The adapter is ready to be connected to the MD-BMS or MD-BMED Power Meter. Building Technologies 125-202...
  • Page 23 2. Select PS/3037. 3. When connecting with an RS-485, enter a base address that matches the switches on the MD-BMS or MD-BMED meter. A USB connection ignores address switches. See Setting the Network Address Switches . 4. When connecting with an RS-485, select BACnet (default) or Modbus as your communication protocol.
  • Page 24 BACnet Device ID. Setting the Network Address Switches There are two rotary network address switches on a serial MD-BMS and MD-BMED Power Meter, labeled MSB and LSB. These two switches are used to select the BACnet/Modbus address the client uses to communicate with the MD-BMS and MD- BMED Power Meters.

  • Page 25: Connecting And Communicating Using An Ethernet (Tcp/Ip) Connection

    Status window displays the following message in the Status field: Unable to establish connection with meter, please check settings and try again. Try the following to resolve the communication error on a serial MD-BMS or MD-BMED Power Meter: ● No RS-485 option available in the PC COM Port drop-down list – Either the meter is not properly connected, or the required software driver is not installed.
  • Page 26 NOTE: When Ethernet is connected, any RS-485 connection is deactivated. To activate the RS-485 interface, the MD-BMS or MD-BMED Power Meters must be power cycled with the Ethernet cable removed. 1. Select Ethernet (TCP/IP) to gather information using a network connection. When selected, the Communications Setup screen changes, and an IP address is required as address switches are ignored.
  • Page 27 Prepping for Installation Connecting a Communication Cable ● Enter the Port connected to the MD-BMED. A check box is available to make the port the default. Different networks may require different ports. See your network administrator. About IP Addresses The Ethernet connection must have an IP address that is manually set in the IP Address: field or obtained automatically from the router connected to the meter using the Use DHCP option (dynamic address) found in the Logger Network Setup dialog box accessed by using the Setup button.

  • Page 28: Communications Leds

    Click Update Logger after making your selections. ViewPoint displays the following message when the connection is successful: Communications LEDs The MD-BMS and MD-BMED COM LEDs signal the following communication information: Table 4: MD Series Meters Serial COM LED Signals. BACnet...

  • Page 29: Version Control

    ViewPoint Software for firmware downloading instructions. Meter Setup Once communication is established between the computer and the MD-BMS or MD- BMED Power Meter, you are now ready to configure the meter for the field. This is accomplished in the Meter Setup tab of ViewPoint.

  • Page 30: Entering Wiring Information For An Element

    NOTE: In MD-BMS and MD-BMED 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.
  • Page 31 Depending on the wiring connection, make changes to CT1, CT2, and/or CT3. ● CT Phase—Shows the voltage of the referenced CT. ● CT Type—Use the drop-down list to select the type of CT attached to the MD-BMS or MD-BMED Power Meter. ● CT Amps—Enter the amperage rating.

  • Page 32: Selecting A Scalar

    (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 MD-BMS or MD- BMED Power Meters: Table 7: Data Scalars and Values for Registers 44001 through 44061.
  • Page 33 Prepping for Installation Meter Setup ● 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 The following table is an example when selecting a data scalar for 3-phase loads...
  • Page 34 Prepping for Installation Meter Setup 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.

  • Page 35: Comms Setup (Communications Setup)

    Prepping for Installation Comms Setup (Communications Setup) Comms Setup (Communications Setup) Use this tab to change communication parameters for the meter, such as communication protocols and how those communications are transferred. This screen displays the fields pertinent to your power connection and communication protocol, so if you are connected by RS-485 then only those fields are shown.

  • Page 36: Ethernet Settings

    Once your communication mode is selected, click Connect to establish a connection between the computer and the MD-BMS or MD-BMED meter. ● When the MD-BMS or MD-BMED meter is in the process of connecting to the computer, the Communication Status LED flashes briefly, followed by a solid green.

  • Page 37: Switching Between Bacnet And Modbus Mode

    Switching Between BACnet and Modbus Mode Changing Communication Mode Using ViewPoint The MD-BMS and MD-BMED Power Meters are shipped with BACnet communications as the default protocol. It is recommended to use the Comms Setup tab in ViewPoint to change communications modes between BACnet and Modbus.
  • Page 38 Changing the MD-BMS or MD-BMED Power Meter from BACnet to Modbus Mode 1. Connect to the MD-BMS and MD-BMED using ViewPoint. 2. Go to the Read/Set Objects tab in ViewPoint. 3. Enter 10190 into the Object field or click List to select from the Object Picker list.
  • Page 39 Green Green After powering up the MD-BMS or the MD-BMED Power Meter, you will have 10 seconds to make changes. However, every time a rotary switch is changed, the 10- second timer resets. After 10 seconds of no switch action, the settings take effect, and the switches revert to the Modbus Address selector if in Modbus mode, or MAC address if in BACnet mode.

  • Page 40: Installation

    Installation Mounting the MD-BMS and MD-BMED Power Meters Installation Once the MD-BMS or MD-BMED Power Meter is set up for the desired communication method and protocol, it is ready to be installed. WARNING Remove the meter from all power sources before mounting.

  • Page 41: Wiring Connections On The Md-Bms And Md-Bmed Power Meters

    Haute tension peut être présente. Risque de choc électrique. Tensions dangereuses peuvent être présentes. Personnel qualifié uniquement.Consequences The MD-BMS and MD-BMED Power Meters have the following wiring connections: (Optional) USB port for powering the meter and communicating during setup, a ●...

  • Page 42: Completing The Installation

    BACnet or Modbus capability. The MD-BMS or MD-BMED can generate pulses based on accumulated value(s) such as system kWh, system kVARh, and system kVAh. When a pulse is generated by the meter, the pulse LED will briefly flash;...

  • Page 43: Modbus Output Port Registers

    Installation Using the Digital Pulse Output Port Function Table 10: Pulse Scalar Values. Data Scalar Pulse Scalar Value kVah kVARh .00001 .00001 .00001 .001 .001 .001 ≥6 For system pulse output: ● kWh pulse output—write 44001 into the pulse output configuration object. ●...

  • Page 44: Wiring Cts

    Installation Wiring CTs BACnet Output Port Objects Table 12: BACnet Digital Port 1 Pulse Output. Object Identifier Object Name Detailed Description 13020 Port 1 output control when used as an on/off— 0 = Output LOW (closed) open/closed switch 1 = Output HIGH (open) [default] Object 13100 present value must = 0 to use 13100 Digital Port 1 Configuration...

  • Page 45: Completing The Wiring Connections - Rs-485, Voltage Leads And Cts

    Installation Wiring CTs Figure 7: Wiring Connections. Completing the Wiring Connections - RS-485, Voltage Leads and CTs 1. Mechanically secure communication cable where it enters electrical utility panel. WARNING The communication cable within electric panels and switchgear should be jacketed, shielded, twisted triad wire BELDEN 1121A.
  • Page 46 4. Tape back one of the communication cable shields and connect the other shield to the Utility Panel Ground. 5. If the MD-BMS or MD-BMED is the last networked device, install the end of line terminator on the positive (+) and negative (-) terminals.

  • Page 47: Connecting Split-Core Millivolt Cts To A Load

    After wiring the communication cable, remove all scraps of wire or foil shield from electrical utility panel. 8. Energize the MD-BMS or MD-BMED Power Meter. It is powered through the red power connector (see wiring connections in Figure 3). 9. Verify proper power meter operation. For normal operation, the RS-485 LED blinks.
  • Page 48 Installation Wiring CTs 2. Connect the CT around the load conductor to be measured. Ensure that the maximum current of the conductor does not exceed the maximum CT rating listed in the Split Core Current Transformers Small, Medium and Large Sizes Technical Specification Sheet (149-406).

  • Page 49: Connecting Rogowski Coil Cts To A Load

    Installation Wiring CTs 1. Connect the white wire on the CT to the positive terminal on the measuring device. 2. Connect the black wire on the CT to the negative terminal on the measuring device. NOTE: Correct orientation of a CT is required to ensure proper measurement. If an arrow is shown on the CT label, it should be pointed toward the load.

  • Page 50: Ct Wire Lead Polarity

    4. Repeat Steps 1 through 3 if you are using more than one Rogowski Coil CT. To connect the CT's wires to the terminals on the MD-BMS or MD-BMED: 1. Connect the CT's brown wire to the negative terminal on the connector.

  • Page 51: Powering The Meter

    Verify that the breaker is marked as the disconnect breaker for the meter. NOTE: The MD-BMS and MD-BMED is rated for 600V Over-Voltage Category III. Cat III is for measurements performed in the building. Examples are measurements on distribution boards, circuit-breakers, wiring (including cables), bus bars, junction boxes, switches, and socket outlets in a fixed installation, and equipment for industrial use.

  • Page 52: Md-Bms And Md-Bmed Power Meters Wiring Diagrams

    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 MD-BMS or MD-BMED element. When paired with the correct voltage phase, each CT provides individual kW/kWh readings for that CT channel.
  • Page 53 Installation MD-BMS and MD-BMED Power Meters Wiring Diagrams Figure 9: Two-Wire, Single Phase. Building Technologies 125-202 06/06/2017...
  • Page 54 Installation MD-BMS and MD-BMED Power Meters Wiring Diagrams Figure 10: Three-Wire, Single Phase. Building Technologies 125-202 06/06/2017...
  • Page 55 Installation MD-BMS and MD-BMED Power Meters Wiring Diagrams Figure 11: Three-Wire Delta. Building Technologies 125-202 06/06/2017...
  • Page 56 Installation MD-BMS and MD-BMED Power Meters Wiring Diagrams Figure 12: Four-Wire Wye. Building Technologies 125-202 06/06/2017...

  • Page 57: Checking Phases

    Installation Checking Phases Checking Phases The Phase LEDs are a unique feature of the MD-BMS and MD-BMED Power Meters that simplify installation by ensuring proper CT-to-phase installation and avoiding faulty data collection. The meters automatically adjust for CT orientation—reducing setup time and nearly eliminating installation errors.

  • Page 58: Verifying Installation With Viewpoint Software

    Installation Verifying Installation with ViewPoint Software The following table describes error conditions and the appropriate correction: Table 14: LED Error Resolution. Error Description Correction Green Green Green Setup is correct and the system Connect the CTs. power factor is greater than 0.55, or all CTs are disconnected.

  • Page 59: Real-Time Values

    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 MD-BMS or MD-BMED Power Meter, and the CT Value.
  • Page 60 Installation Verifying Installation with ViewPoint Software Using Real-Time Values to Verify Setup Values displayed for Volts, Amps, KW, and so on, should make sense (the values in the table are relevant for the service being measured). This indicates that the power meter is set up correctly.

  • Page 61: Read/Write Registers - Read/Set Objects

    Read/Write Registers – Read/Set Objects The Read/Write Registers, Read/Set Objects screen provides diagnostic and special configuration options, allowing the changing or viewing of the value of any MD-BMS or MD-BMED register or object. The tab name changes depending on which protocol (Modbus or BACnet) you are using;...
  • Page 62 Resetting BACnet Objects/Modbus Registers Many of the MD-BMS or MD-BMED objects/registers are real-time values such as instantaneous watts or power factor. However, some objects are accumulated values such as kWh, kVARh, kVAh and various Peak Demand (kW) values.

  • Page 63: Firmware

    MD-BMED meter by clicking the Connect button on the Communications tab. NOTE: Siemens Industry, Inc. recommends using 115,200 bps as the baud rate when downloading firmware updates using an RS-485. There are no baud rate settings when connected using USB or Ethernet.
  • Page 64 Installation Verifying Installation with ViewPoint Software web site. Once downloaded, return to the Firmware tab and use the Browse command button to select the file, and download the new version to the meter. ● Click Show Version to see which version of firmware is currently loaded in the meter.

  • Page 65: Appendices

    Appendices Appendix A - MD-BMS and MD-BMED Power Meters BACnet Analog Value Objects Appendices Appendix A - MD-BMS and MD-BMED Power Meters BACnet Analog Value Objects The MD-BMS and MD-BMED Power Meters support writable max_master and max_info_frames properties in the device object for MS/TP networks. For best network performance, the max_master should be set to the highest MS/TP MAC address on the network.
  • Page 66 Appendices Appendix A - MD-BMS and MD-BMED Power Meters BACnet Analog Value Objects Object Name Description Identifier (resettable) (Signed Net) 1100 kW System Max System Highest Instantaneous Draw Since Reset (kW) 1110 kW System Maximum Positive System Highest Instantaneous Positive Draw Since Reset (kW) (Signed Net)
  • Page 67 Appendices Appendix A - MD-BMS and MD-BMED Power Meters BACnet Analog Value Objects Object Name Description Identifier 3070 Volts L3N " 4010 Amps Sys Avg Average of all phases. 4020 Amps L1 Individual Phase Currents (A) 4030 Amps L2 "...
  • Page 68 Appendices Appendix A - MD-BMS and MD-BMED Power Meters BACnet Analog Value Objects Object Name Description Identifier 7050 kVAh L2 Positive " 7060 kVAh L2 Negative " 7080 kVAh L3 Positive " 7090 kVAh L3 Negative " 8000 kVA System System Total Apparent Power (kVA).

  • Page 69: Configuration Objects (10020 - 13000)

    Appendices Appendix A - MD-BMS and MD-BMED Power Meters BACnet Analog Value Objects Object Name Description Identifier 12011 CT1 Value CT1 Value 12012 CT2 Value CT2 Value 12013 CT3 Value CT3 Value 12030 Pulse Scalar Changes the scaling of the output pulses.
  • Page 70 Appendices Appendix A - MD-BMS and MD-BMED Power Meters BACnet Analog Value Objects Object Name Description Identifier 12011 CT1 Value CT1 Value 12012 CT2 Value CT2 Value 12013 CT3 Value CT3 Value 12030 Pulse Scalar Changes the scaling of the output pulses.

  • Page 71: Pulse Output/Input Objects

    Appendices Appendix A - MD-BMS and MD-BMED Power Meters BACnet Analog Value Objects Pulse Output/Input Objects Object Name Description Identifier 13020 Port 1 output control when used as an on/off- 0 = Output LOW (closed) open/closed switch 1 = Output HIGH (open) [default] Object 13100 present value must = 0 to use.

  • Page 72: Negative Power/Energy Accumulator Objects

    Appendices Appendix A - MD-BMS and MD-BMED Power Meters BACnet Analog Value Objects Object Name Description Identifier 2100 kWh L3 Positive " 6010 kVARh System System Total Reactive Energy (Signed) 6020 kVARh Sys Total Pos System Total Positive Apparent Energy (kVAh) (Signed Net) Accumulates only when kVAh is positive.
  • Page 73 Appendices Appendix A - MD-BMS and MD-BMED Power Meters BACnet Analog Value Objects Object Name Description Identifier 7060 kVAh L2 Negative " 7090 kVAh L3 Negative " Building Technologies 125-202 06/06/2017...
  • Page 74 Appendices Appendix B - MD-BMS and MD-BMED Power Meters Modbus Absolute/Net Value Measurement Registers and Protocol Commands Appendix B - MD-BMS and MD-BMED Power Meters Modbus Absolute/Net Value Measurement Registers and Protocol Commands Offset refers to a base of 40001.
  • Page 75 Appendices Appendix B - MD-BMS and MD-BMED Power Meters Modbus Absolute/Net Value Measurement Registers and Protocol Commands Modbus Offset Register Description 44020 4019 Volts L2 to L3 Individual Phase to Phase Voltage 44021 4020 Volts L1 to L3 " 44022...
  • Page 76 Appendices Appendix B - MD-BMS and MD-BMED Power Meters Modbus Absolute/Net Value Measurement Registers and Protocol Commands Modbus Offset Register Description 44051 4050 Displacement PF L2 " 44052 4051 Displacement PF L3 " 44053 4052 Apparent PF L1 Individual Phase apparent Power Factors (PF)
  • Page 77 Appendices Appendix B - MD-BMS and MD-BMED Power Meters Modbus Absolute/Net Value Measurement Registers and Protocol Commands Table 16: Configuration Registers. Modbus Offset Register Description 40129 0128 Synchronize Register Multiple MD Model Power Meter’s synchronization register. 44066 4065 Clear Accumulated...
  • Page 78 Appendices Appendix B - MD-BMS and MD-BMED Power Meters Modbus Absolute/Net Value Measurement Registers and Protocol Commands Modbus Offset Register Description 44616 4615 Volts Multiplier Decimal Multiply volts values by (this scalar/1000+Volts Multiplier Integer). Use with Step-down Transformer. Affects all parameters that use volts (such as kW).
  • Page 79 Appendices Appendix B - MD-BMS and MD-BMED Power Meters Modbus Absolute/Net Value Measurement Registers and Protocol Commands Modbus Offset Register Description 44210 4209 Serial Number last 2 bytes " 44511 4510 Hardware ID Hardware revisions. 44069 4068 Firmware Major Revision...
  • Page 80 Appendices Appendix B - MD-BMS and MD-BMED Power Meters Modbus Absolute/Net Value Measurement Registers and Protocol Commands Table 20: Pulse Output/Input Registers Modbus Offset Register Description 44402 4401 Port 1 output control when used 0 = Output LOW (closed) as an on/off-open/closed switch 1 = Output HIGH (open) [default] Register 45110 must = 0 to use.
  • Page 81 Appendices Appendix B - MD-BMS and MD-BMED Power Meters Modbus Absolute/Net Value Measurement Registers and Protocol Commands Modbus Offset Register Description contain that value; otherwise, it will be zero). 46015 6014 Positive Apparent PF System System Positive Apparent Power Factor (aPF);...
  • Page 82 Appendices Appendix B - MD-BMS and MD-BMED Power Meters Modbus Absolute/Net Value Measurement Registers and Protocol Commands Modbus Offset Register Description 46039 6038 Positive kVAR L2 " 46040 6039 Positive kVAR L3 " 46041 6040 kVAh L1 LSW Individual Phase Apparent Energy LSW (kVAh,...
  • Page 83 Appendices Appendix B - MD-BMS and MD-BMED Power Meters Modbus Absolute/Net Value Measurement Registers and Protocol Commands Modbus Offset Register Description 46080 6079 Positive kW System Average Equals Positive KWH_SYSTEM_L&M ÷ (TimeSinceReset_L&M seconds /3600 seconds/Hr) (resettable). 46081 6080 Positive kW Demand System...
  • Page 84 Appendices Appendix B - MD-BMS and MD-BMED Power Meters Modbus Absolute/Net Value Measurement Registers and Protocol Commands Modbus Offset Register Description 47013 7012 kVA System System Instantaneous Apparent Power (kVA) 47014 7013 Negative Displacement PF System System Negative Displacement Power Factor (dPF);...
  • Page 85 Appendices Appendix B - MD-BMS and MD-BMED Power Meters Modbus Absolute/Net Value Measurement Registers and Protocol Commands Modbus Offset Register Description 47037 7036 Negative kVARh L3 MSW " 47038 7037 Negative kVAR L1 Individual Phase Negative Instantaneous Reactive Powers (kVAR)

  • Page 86: Protocol Commands

    Appendices Appendix B - MD-BMS and MD-BMED Power Meters Modbus Absolute/Net Value Measurement Registers and Protocol Commands Modbus Offset Register Description 47061 7060 Volts L3 to Neutral “ 47062 7061 Time Since Reset LSW (Seconds) Seconds since kWh, kVAh, kVARh and associated Demand registers were reset.
  • Page 87 Appendices Appendix B - MD-BMS and MD-BMED Power Meters Modbus Absolute/Net Value Measurement Registers and Protocol Commands Read Holding Registers This command reads the contents of a contiguous block of holding registers containing data values from the power meter. When a read command is received, the power meter sends a response that includes the value of the requested registers.
  • Page 88 Appendices Appendix B - MD-BMS and MD-BMED Power Meters Modbus Absolute/Net Value Measurement Registers and Protocol Commands The response from the power meter at address 37. Two bytes were read from the requested register, 000C. The value of the registers read was 0000. The DRC value was 4070.
  • Page 89 Appendices Appendix B - MD-BMS and MD-BMED Power Meters Modbus Absolute/Net Value Measurement Registers and Protocol Commands Example Request Field Name Command Response Field Name Response (Hex) (Hex) Register value to write – low order Register value written – low order...
  • Page 90 Appendices Appendix B - MD-BMS and MD-BMED Power Meters Modbus Absolute/Net Value Measurement Registers and Protocol Commands Slave ID The MD-BMS and MD-BMED power meters use the following default format for the slave ID: Siemens Industry MD-BMS, Serial Number, FW Ref Major Revision, Minor Revision, Scalar X.

  • Page 91: Appendix C - Connecting Multiple Md Power Meters To An Rs-485 Network

    This section describes setting up a network with multiple MD-BMS or MD-BMED Power Meters using the BACnet or Modbus communication protocol. An RS-485 network can support up to 127 MD-BMS or MD-BMED devices using the BACnet protocol and 247 MD-BMS or MD-BMED devices using the Modbus protocol. Due to typical BAS network traffic, it is suggested to limit the BACnet devices to less than 100 meters on a network and Modbus devices to less than 150 meters on a network.

  • Page 92: Downloading And Installing Firmware

    See Installing the ViewPoint Software and Communicating with the MD Model Power Meter for additional information. 2. Select the baud rate for loading the firmware to the MD-BMS or MD-BMED Power Meter. A baud rate of 9600 downloads the firmware to the MD-BMS or MD-BMED in approximately six minutes.
  • Page 93 The tables display the real-time values of Volts, Amps, Kw, KVA, KVAR, and Power Factor (PF) for Phase L1, Phase L2, and Phase L3. This screen also displays the CT type connected to the MD-BMS or MD-BMED Power Meter and the CT value.
  • Page 94 Appendices Appendix D - Installing Firmware Updates for the MD-BMS and MD-BMED Power Meter Using the Optional Visual Display to Verify Real-Time Values (MD-BMED Model Only) The MD-BMED Power Meter has a two-line × 16-character backlit visual display that enables you to read real-time values directly from the meter. It has two rows of 16 characters that auto cycle between informational screens every two to three seconds, with real-time values updated every second.

  • Page 95: Appendix E - Modbus Veris H8035/H8036 Emulation

    Appendix E – Modbus VERIS H8035/H8036 Emulation Appendix E – Modbus VERIS H8035/H8036 Emulation The MD-BMS and MD-BMED Model Meters can be used as a direct replacements for the Veris, Inc. H8035/H8036 series of networked power meters. This mirroring of the Veris Modbus register assignments makes replacement with an MD-BMS or MD- BMED Power Meter simple.
  • Page 96 Appendices Appendix E – Modbus VERIS H8035/H8036 Emulation Modbus Offset ViewPoint Name Description Register 40005 kVA System System Apparent Power (kVA) 40006 Apparent PF System System Apparent Power Factor (PF) 40007 Volts Line to Line Avg Average Line to Line Voltage 40008 Volts Line to Neutral Avg Average Line to Neutral Voltage...
  • Page 97 Appendices Appendix E – Modbus VERIS H8035/H8036 Emulation Table 32: Veris Multipliers for Integer Registers 40001-40027. Address Units ≤ 100A 101-400A 401-800A 801-1600A 1601-32,000A 40001 kWH LSB 7.8125exp-3 0.03125 0.0625 0.125 0.25 40002 kWH MSB 2048 4096 8192 16384 40003 0.004 0.016 0.032...
  • Page 98 Appendices Appendix E – Modbus VERIS H8035/H8036 Emulation For example, if the MD-BMS or MD-BMED Model Power Meter 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.
  • Page 99 Appendices Appendix E – Modbus VERIS H8035/H8036 Emulation Modbus Offset ViewPoint Name Description Register 40285 VERIS Float Apparent PF L3 MSW Individual Phase Apparent Power Factor L3 MSW 40286 VERIS Float Apparent PF L3 LSW Individual Phase Apparent Power Factor L3 LSW 40287 VERIS Float Volts L1 to L2 MSW Phase to Phase Voltage L1 to L2 MSW...

  • Page 100: Appendix F - Decimal To Hexadecimal Conversion Table

    Appendices Appendix F - Decimal to Hexadecimal Conversion Table Appendix F - Decimal to Hexadecimal Conversion Table Decimal values are used for the MD Series Power Meter addresses. The hex value is the corresponding value set on the upper and lower rotary network address switches on the MD Model Power Meter.
  • Page 101 Appendices Appendix F - Decimal to Hexadecimal Conversion Table Decimal Decimal Decimal Decimal Decimal Decimal Building Technologies 125-202 06/06/2017...

  • Page 102: Appendix G - Md-Bmed With Visual Display

    Appendices Appendix G - MD-BMED with Visual Display Appendix G - MD-BMED with Visual Display The MD-BMED Power Meter features a backlit digital display. It has two rows of 16 characters that auto cycle between informational screens every two to three seconds, with real-time values updated every second.
  • Page 103 Appendices Appendix G - MD-BMED with Visual Display Display Configuration Instructions Mode Selection: The meter display can be toggled between an “Auto Cycle” mode (default) or “Manual Cycle and Hold” mode by pushing/holding the meter display button for >5 seconds, This mode change is saved to non volatile memory in case of power loss.

  • Page 104: Appendix H - Troubleshooting

    2. On the MD-BMS or MD-BMED, set the address switches to 00. 3. Power up the meter. With both settings at 00, ViewPoint and the MD-BMS or MD- BMED will communicate at a 9600 baud rate, regardless of a baud rate mismatch.
  • Page 105 Appendices Appendix H - Troubleshooting Other Communication Failures (RS-485 Only) The following items can also cause a communication failure: ● Check for wiring and cabling issues with the RS-485 adapter. Check for polarity, frayed wires, and/or pinched insulation. ● Verify that the DIP Switches on the back of the USB to RS-485 adapter are set to the following: ●...

  • Page 106: Appendix I- Core Measurement Parameters: Voltage, Current, And Frequency

    Appendices Appendix I- Core Measurement Parameters: Voltage, Current, and Frequency Appendix I- Core Measurement Parameters: Voltage, Current, and Frequency Measurement Parameters: Voltage, Current and Frequency BACnet Modbus Modbus Object Register Offset Identifier (Offset to a Base of 40001) Vac - Voltage Voltage Line to Line Average (Volts L-L Avg) = avg L-L, signed, average Line to Line for all phases, in Vac, BACnet 3000...
  • Page 107 Appendices Appendix I- Core Measurement Parameters: Voltage, Current, and Frequency Measurement Parameters: Voltage, Current and Frequency BACnet Modbus Modbus Object Offset Register (Offset to a Base of Identifier 40001) Amps - Current System Current Average (Amps Sys) = amps sys, signed, average of all phases, in Amps, BACnet 4010 ‒...

  • Page 108: Appendix J - Core Measurement Parameters: Power Factor

    Appendices Appendix J - Core Measurement Parameters: Power Factor Appendix J - Core Measurement Parameters: Power Factor Measurement Parameters: Power Factor BACnet Modbus Modbus Object Register Offset (Offset to a Identifier Base of 40001) aPF – Apparent Power Factor (generic Power Factor) is the ratio of true power (watts) to apparent power (volt-amperes), expressed in decimal form;...
  • Page 109 Appendices Appendix J - Core Measurement Parameters: Power Factor Measurement Parameters: Power Factor BACnet Modbus Modbus Object Offset Register Identifier (Offset to a Base of 40001) dPF – Displacement Power Factor is the difference between applied power and true power when only the phase relationship of voltage and current at the fundamental are taken into account, expressed in decimal form;...

  • Page 110: Appendix K - Core Measurement Parameters - Power

    Appendices Appendix J - Core Measurement Parameters: Power Factor Appendix K - Core Measurement Parameters - Power Measurement Parameters: Power BACnet Modbus Modbus Object Register Offset (Offset to a Identifier Base of 40001) kW – Real Power defined as KiloWatts is RMS volts times the RMS current divided by 1000, where the voltage wave and the current wave are in phase (zero degrees phase shift).
  • Page 111 Appendices Appendix J - Core Measurement Parameters: Power Factor Measurement Parameters: Power BACnet Modbus Modbus Object Register Offset (Offset to a Identifier Base of 40001) NOTES: If avg kW value>0, avg positive kW = avg kW, avg negative kW = 0 If avg kW value<0, avg negative kW = avg kW , avg positive kW = 0) System Maximum Power Draw (kW System Max) system highest instantaneous power draw since reset, in kW (resettable)
  • Page 112 Appendices Appendix J - Core Measurement Parameters: Power Factor Measurement Parameters: Power BACnet Modbus Modbus Object Offset Register (Offset to a Identifier Base of 40001) kVA – Apparent Power defined as Kilo Volt-Amperes is the product of the RMS volts across a load or source times the RMS current passing through the load or source divided by 1000. This is the square root of the sum of the squares of the KW and the KVAR.
  • Page 113 Appendices Appendix J - Core Measurement Parameters: Power Factor Measurement Parameters: Power BACnet Modbus Modbus Object Register Offset (Offset to a Identifier Base of 40001) If kVA L2 value>0, positive kVA L2 = total kVA L2, negative kVA L2 = 0 If kVA L2 value<0, negative kVA L2 = total kVA L2, positive kVA L2 = 0 Individual Phase Apparent Power- L3 (kVA L3) = total kVA L3 value, signed, individual L3 phase true power in kVA, BACnet...
  • Page 114 Appendices Appendix J - Core Measurement Parameters: Power Factor Measurement Parameters: Power BACnet Modbus Modbus Object Register Offset (Offset to a Identifier Base of 40001) If kVAR L1 value>0, pos kVAR L1= total kVAR L1, neg kVAR L1= 0 If kVAR L1 value<0, neg kVAR L1= total kVAR L1, pos kVAR L1= 0 Individual Phase Reactive Power- L2 (kVAR L2) = total kVAR L2 value, signed, individual L2 kVAR power, in kVAR, BACnet 5060...

  • Page 115: Appendix L - Core Measurement Parameters - Energy

    Appendices Appendix L - Core Measurement Parameters - Energy Appendix L - Core Measurement Parameters - Energy Measurement Parameters: Energy BACnet Modbus Modbus Object Register Offset (Offset to a Identifier Base of 40001) kWh – Real Energy defined as Kilowatt-hour is a unit of energy equivalent to one kilowatt (1 kW) of power expended for one hour (1 h) of time.
  • Page 116 Appendices Appendix L - Core Measurement Parameters - Energy Measurement Parameters: Energy BACnet Modbus Modbus Object Offset Register (Offset to a Identifier Base of 40001) kVAh – Apparent Energy defined as Kilovolt-Ampere-Hours is a measure of apparent energy. if the power factor has been constant (1.0) during the time period of metering (measuring) the load, then kVAh * Power Factor = kWh, or kWh/kVAh= Average PF.
  • Page 117 Appendices Appendix L - Core Measurement Parameters - Energy Measurement Parameters: Power Factor BACnet Modbus Modbus Object Offset Register Identifier (Offset to a Base of 40001) kVARh – Reactive Energy defined as Kilo Volt-Amperes, Reactive is a measure of the rate of energy that is sloshing back and forth, twice a cycle, between an AC source and a reactive (capacitive or inductive) load.

  • Page 118: Frequently Asked Questions - Faqs

    One (or more) of the phase verification LEDs is red. What does this mean? Any number of red lights indicates the MD-BMS or MD-BMED Power Meter are wired incorrectly. Review the table in the Phase Verification section of this manual for a description of the indicator lights.
  • Page 119 Frequently Asked Questions - FAQs See Prepping for Field Installation . How can I fix BACnet network timing errors/slowness? The maximum number of the MSTP master should be set to the highest MAC address present in the network. Max Master is a setting on the Communications tab of the ViewPoint™...

  • Page 120: Glossary

    Digital Output The MD-BMS and MD-BMED Power Meters have an output port. The port 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.
  • Page 121 Pulse Output Pulse output is used to generate pulses for external devices such as data loggers that can accept pulses. The MD-BMS and MD-BMED Power Meters can generate pulses based on accumulated value(s) such as system kWh, system kVARh, and system kVAh.
  • Page 122 © Siemens Industry, Inc., 2017 Siemens Industry, Inc. Technical specifications and availability subject to change without notice. Building Technologies Division 1000 Deerfield Pkwy Buffalo Grove IL 60089 Tel. +1 847-215-1000 Document ID 125-202 125-202 (CA) MD-BMS and MD-BMED Power Meters Edition 06/06/2017...

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