User Guide MD-3HD MD-12HD MD-24HD MD-48HD Networked Metering Systems ii Siemens Industry, Inc.
A6V11564207 May 2021
User Guide: MD-xxHD Networked Power Meters ©2021 Siemens. All rights reserved. This manual may not be reproduced or distributed without written permission from Siemens. Content in this manual has been reproduced with permission from Dent Instruments, Inc. View Point HD™, and TouchSaf™ are trademarks of Dent Instruments, Inc. Windows®, Windows® 7, Windows® 8, and Windows® 10 are registered trademarks of Microsoft Corporation. Siemens Industry, inc.
Table of Contents Table of Contents ..........................................................................................................iii Introduction ...................................................................................................................6 Unpacking the Unit.....................................................................................................6 MD-xxHD Components ..............................................................................................
Real Time Clock Power Source .................................................................................31 Retrieving Interval Data ...........................................................................................32 MD-xxHD Web App Overview ...................................................................................33 Connect to Web App using USB .............................................................................34 Connect to Web App using Ethernet ..........................
CT Orientation Check ................................................................................................57 Power Factor Convention ..........................................................................................58 Total Harmonic Distortion ..........................................................................................58 Pre-Processing Aids ..................................................................................................59 Snap Thresholds ...................
Introduction There are four meters in the MD-xxHD Series: the MD-3HD, MD-12HD, MD-24HD and the MD-48HD. These meters monitor the voltage, current, power, energy, and many other electrical parameters on single and three-phase electrical systems. A MD-xxHD meter uses direct connections to each phase of the voltage and current transformers to monitor each phase of the current. Information on energy use, demand, power factor, line frequency, and more are derived from these voltage and current inputs.
▪ Certificate of Calibration (COC) ▪ USB Cable (cable type dependent on meter choice) o USB A to B Cable (PS12/PS24/PS48; one per order) o USB A to C Cable (PS3HD; one per order) MD-xxHD Components All user connections are made on the circuit board. Connectors are identified by function and include polarity markers. 7 Siemens Industry, Inc.
MD-48HD (Mounting Plate Model MD-48HD-P-D-N Shown) Siemens Industry, inc.
Alternate Product Configuration MD-12HD-C-D-N (Enclosure with Cover Removed) 9 Siemens Industry, Inc.
MD-3HD-R-D-N (With Cover Removed) Siemens Industry, inc.
MD-xxHD Meter Safety Summary and Specifications This general safety information is to be used by both the Logger operator and servicing personnel. Siemens assumes no liability for user’s failure to comply with these safety guidelines. MD-3HD-C-D-N MD-3HD-R-D-N MD-12HD-P-D-N MD-24HD-C-D-N MD-48HD-P-D-N The MD-xxHD Family conform to the following: MD-xxHD Series: Conforms to UL Std 61010-1, 3rd Edition Certified to CSA Std C22.2 No.
Symbols in Documentation Contains additional information pertinent to current subject DO NOT EXCEED 346V Line to Neutral or 600 volts Line to Line. This meter is equipped to monitor loads up to 346V L-N. Exceeding this voltage will cause damage to the meter and danger to the user. Always use a Potential Transformer (PT) for voltages in excess of 346V L-N or 600 volts line to line. The MD-xxHD is a 600 Volt Over Voltage Category III device. Maintenance There is no required maintenance with the MD-xxHD.
Meter Safety Building Service Safety Requirements (Load Center, etc.) Equipment intended for use with field-installed current transformers that could be installed in panel boards or switchgears shall observe the following: Always open or disconnect circuit from power-distribution system (or service) of building before installing or servicing current transformers. A circuit breaker used as a disconnect must meet the requirements of IEC 60947-1 and IEC 60947-3 (Clause 6.11.4.
Planning For Field Installation Project Manager Aspects Meter installation often includes coordination between individuals or groups of people with different responsibilities. Spend a few minutes considering who will be executing each portion of the installation and what tools are needed at each stage. Things to consider include determining how to communicate with the meter, setting address configuration, installing ViewPoint HD, access to PIN numbers, etc.
Information Access by Interface Type Device Meter Setup Security PINs Enforced Configuration Real Time Values PC or Laptop Running When Used Siemens Interface Options ViewPoint HD Field Visit Smart Device or Tablet via MD-xxHD Web App Field Visit Customer LCD on Meter (if equipped) End User All Meter Parameters Voltage Waveform Capture Current Harmonic Analysis All Meter Parameters VA All Element View Single Element View VAR Phasor Plot kWh Alarms Single Element View Entire Mete
Meter Configuration Overview ▪ Work performed ahead of the installation saves time in the field and results in fewer mistakes! Tools • • • Typical Work • • Desktop or Laptop PC USB Type AB Cable (preferred) or Ethernet and USB wall charger (> 500 mA) Thumb Drive included with order (ViewPoint HD Installer) or access to • • • https://www.dentinstruments.
Verification and Communication Overview ▪ Can be modified with power applied to the meter.
Meter Configuration - Details This section is written to support setting up the MD-xxHD in an office environment and configuring the power meter for a pre-determined configuration. In many cases, the setup is standardized for an organization or project. In other cases, the setup can be documented and emailed to an installer. The setup can also be performed on-site and reflect “as-built” configurations. The MD-xxHD meter cannot be configured using ViewPoint HD over a serial port.
Custom Installation For users who want to specify the location of the ViewPoint HD software and support files, double-click the folder Install Files and run setup.exe. This will prompt the user for additional details. Installation Trouble Shooting Successful installation of ViewPoint HD may be prevented by settings specific to your PC for the following reasons: 1) Anti-virus protection software may interfere with the installation of ViewPoint HD.
Connection and Configuration Options Using ViewPoint HD When the ViewPoint HD application is launched, it will prompt the user to select one of four connectivity options. • • • • Connect over USB cable Connect over Ethernet to a Predetermined IP address Scan Network Create Setup file only (no meter connected) NOTE: The USB connection method is recommended for new users who have physical access to the meter and a USB A to B cable (supplied).
A to B Cable For MD-12HD, MD-24HD, and MD-48HD A to C Cable For MD-3HD- 2. Launch the ViewPoint HD application and press the CONNECT OVER USB button on the pop-up window. The meter should now be communicating. The ViewPoint HD application offers visual guides and context help to facilitate meter configuration. Read the ViewPoint HD overview section (below) or watch the tutorial videos for additional information on configuring the meter.
Ethernet Network Connections Configuring the MD-xxHD over Ethernet requires that the meter be powered using a second connection. The MD-xxHD does not support Power Over Ethernet (POE). If the meter is already installed within the building’s electrical network, closing the AC breaker (or approved disconnect) will turn on the meter through the meter’s internal power supply.
Once the PC and MD-xxHD are set to communicate on the same IP subnet: 1. Launch the ViewPoint HD application and enter the IP address of the meter (shown as the factory default). 2. Press the Connect over Ethernet to: button on the pop up window. 3. The meter should now be communicating. ViewPoint HD is an intuitive application; read the ViewPoint HD overview section (below) and/or watch the tutorial videos for additional information on configuring the meter.
Network Scan Network Scan is a feature for monitoring previously installed and configured MD-xxHD meters over an Ethernet network. Network Scan will broadcast a UDP discovery packet on the same network as the PC running the ViewPoint HD application. Normally this will be performed on a corporate network running DHCP. Any MD-xxHD meter that responds will be displayed in a table that includes the system description register, IP address, serial number, and communication configuration.
ViewPoint HD Software Overview ViewPoint HD is a Windows application and is the most versatile software tool for configuring and verifying a MD-xxHD meter. All functions and menus are accessed under the central drop-down list which has a content filter for viewing basic metering data or extended data that can be helpful in troubleshooting. The information displayed in the drop-down list for each filter setting is summarized below.
ViewPoint HD Documentation ViewPoint HD includes context help and other user-guiding features (shown below) to facilitate rapid and accurate configuration. Help Aids Information This button toggles the context pop-up window which displays the technical and register description of any screen object you hover over with the mouse.
ViewPoint HD™ Documentation—Instructional Videos Additional information about the capabilities of ViewPoint HD software is presented in short videos and can be found at https://www.dentinstruments.com/siemens and on the provided thumb drive: .Video Topic Files @ ThumbDrive\Manual\VIDEOS Description MD-xxHD Meter Setup MD-xxHD Meter Setup \ MD-xxHD Meter Setup 8_18_2017.mp4 Identify the steps required for basic configuration of the power meter including selecting a voltage service and CT types.
Configuring Electrical Components using ViewPoint HD Siemens Industry, inc.
Configuring Communications using Viewpoint HD Navigate to Communication Setup under the Display Menu List Box RS-485 OR ETHERNET RS-485 Modbus Set Serial Settings Modbus OR BACnet Ethernet BACnet Modbus Set Serial Settings Set Modbus Port (optional) Modbus OR BACnet Set Device ID Set BACnet Port & BBMD (optional) Set Device ID Set MS/TP Address BACnet DHCP DHCP OR STATIC Static IP Set Max Masters (optional) Set Static IP Address Set Max Info Frames (optional) Set Subnet Mask Set Gate
Configuring Alarms in ViewPoint HD The MD-xxHD power meter has the ability to set alarms for over and under conditions for voltage and current on any meter channel. Configuration Input Methods ViewPoint HD uses dynamic entry for the specification of Alarm settings. Whichever text entry field is selected becomes the forcing condition and the other related fields are updated by calculation to reflect a consistent set of conditions.
Setting the Real Time Clock The MD-xxHD meter includes a Real Time Clock. The clock is used only to time stamp Interval Data in the log, it is not used for calculation within the meter. For those customers using the IDR function of the meter, it is helpful (but not strictly necessary) to set the real time clock so that data records can be uniquely identified. The time can be set using ViewPoint HD, under the Advanced Tab, by clicking on the small time icon in the bottom right corner of the clock.
Retrieving Interval Data The MD-xxHD meter maintains an internal log of the energy data (Net kWh) for each channel in the meter. This log is updated every 15 minutes and is always active. The meter stores 63 days’ worth of 15minute data in its memory. This data can be retrieved by users looking to restore gaps in data collection where RTUs may have been offline or communication has been interrupted. The Interval Data Recording (IDR) is assessed through ViewPoint HD in the Advanced menu.
Updating Firmware The MD-xxHD meter firmware is updated approximately twice a year in response to minor bug correction or customer requested features. Documentation is expected to be downloaded and used together within a “Media Release” which includes firmware, ViewPoint HD Updates, register list updates, and manual updates. Mix and match operation of components between separate Media Releases is not recommended. The basic updating procedure is as follows: 1.
8. Acknowledge the upgrade by clicking OK. MD-xxHD Web App Overview The MD-xxHD power meter hosts a Web Application that can be accessed by any smart device running a web browser. The MD-xxHD Web App can be accessed by using the USB or Ethernet port. Macintosh users can configure the meter using the MD-xxHD Web App Interface by installing a driver which is available from the Siemens web site at www.dentinstruments.com/siemens Connect to Web App using USB 1. Connect your smart device to the meter 2.
MacOS Users ViewPoint HD is a Windows application and does not run on MAC OS. MAC users can, however, make use of the MD-xxHD Web App interface through the USB port by installing a CDC-EEM driver. This driver is available in the Media Distribution materials or can be downloaded from the DENT Instruments web site. 1. 2. 3. 4. 5. 6. 7. 8. 9. 35 Users must have OS version of 10.11.1 or higher. Drag the file dentinstruments-2.03a1.dmg onto the desktop. Double-click the dmg file to initiate the MAC installer.
Meter Installation - Details This section is intended to support the physical installation of the meter and provide guidance on connecting the current transformers (CTs) correctly within the electrical load center and to the MD-xxHD meter. Meter Mounting Configurations Siemens MD-xxHD meters are sold in several form factors. Enclosures are designed to be wall mounted and connected to electrical conduit. Plate mounted versions are ready to be mounted inside a customer supplied NEMA enclosure.
Installation Sequence The following section illustrates the MD-12HD model. The MD-3HD-C-D-N, MD-24HD, and MD-48HD components are slightly different, but follow the same procedure. STEP 1. Remove top cover screws (4x) and high voltage cover screws (2x) – provided. STEP 2. Locate, mark, and drill wall mounting points (2x–6x—customer supplied). The plastic enclosure itself can be used as a template for marking the drill locations on the wall.
STEP 3. Mount conduit fittings, conduits, and blanking plugs. STEP 4. Connect voltage leads DO NOT ENERGIZE METER WITH VOLTAGE COVER REMOVED. Siemens Industry, inc.
STEP 5. Attach high voltage cover. IP30 TOUCH SAFE (with internal cover installed) STEP 6. Connect CT and Communications Wiring. Connecting Voltage Connect the voltage leads (L1, L2, L3, and N, as necessary) to the meter through a dedicated disconnect or circuit breaker. A voltage lead of 14 AWG THHN Minimum 600VAC rating (or equivalent) is required. IMPORTANT: Verify the circuit breaker is marked as the disconnect breaker for the meter. 39 Siemens Industry, Inc.
Installation Sequence for MD-3HD-R-D-N The following section illustrates the MD-3HD-R-D-N model, which is equipped with a built-in DIN rail channel for easy installation. The unit must be installed inside a UL approved electrical enclosure. STEP 1. Within a suitable UL-approved enclosure, attach a section of T35 DIN rail on which the MD-3HD will be mounted. Leave enough clearance for voltage, CT, and communication wires to be routed within the enclosure. The UL-approved enclosure is customer supplied.
STEP 4. Reattach the TouchSāf™ high voltage cover. STEP 5. Connect CT and Communications Wiring. Connecting Voltage Connect the voltage leads (L1, L2, L3, and N, as necessary) to the meter through a dedicated disconnect or circuit breaker. A voltage lead of 14 AWG THHN Minimum 600VAC rating (or equivalent) is required. IMPORTANT: Verify the circuit breaker is marked as the disconnect breaker for the meter. 41 Siemens Industry, Inc.
Wiring the MD-xxHD Meter in a 3-wire, Split ɸ Service Panel High voltage MAY BE PRESENT. Risk of electric shock. Life threatening voltages may be present. Qualified personnel only.
Wiring the MD-xxHD Meter in a 4-wire, 3 ɸ Service Panel 3 Wire, 3 ɸ used On MAINS L1-N, L2-N, L3-N Connect the Neutral wire or Ground wire to V INPUT 1 (N) on the MD-xxHD meter (RōCoils Shown) Single Phase Branch Loads L1-N Meter Power Connect all phases to the V INPUT 1 terminal (Label as Disconnect) 3-Wire, 3 ɸ DELTA load (No possibility of Neutral Current) L1-N, L2-N(est), L3-N 4 Wire, 3 ɸ WYE load (Neutral Current) L1-N, L2-N, L3-N Illustrating the Intended Wiring Configuration for Each of the S
Wiring the MD-xxHD Meter in a Single-Phase Application The MD-xxHD meter is internally powered through the voltage between L1 and L2. For single-phase installations where no L2 exists it is advised to jumper N to L2. This connection provides power to the meter while maintaining Neutral as the metering voltage reference.
Wiring the CTs to the MD-xxHD Meter The image below is the counterpart to the service panel illustration and indicates how to connect CTs to the MD-xxHD meter for each service type. For service types that are not specifically listed, it is recommended to choose single-phase service and configure each channel individually. Three-phase loads are illustrated on the left and split-phase loads on the right as an example only. Elements are fully interchangeable on the meter. 45 Siemens Industry, Inc.
Wiring CTs to MD-3HD Meters The images below represent CT and voltage connections between the MD-3HD and the most common service types. For specific wiring questions outside the scope of this document, contact Siemens Technical Support. Three-Wire Single-Phase Two CT Three-Wire Delta 46 Siemens Industry, Inc.
Four-Wire Wye Communication and Verification - Details This section is intended to support the commissioning of the MD-xxHD meter by an instrumentation technician. In many cases, the electrical installation is conducted ahead of the availability of the RTU or was performed by a different installer. Often the technician is working in concert with a remote programmer who is confirming the connectivity with a remote host system.
Physical Connections on an RS-485 Multidrop Network The MD-xxHD meter uses a 2-Wire Half Duplex RS-485 Implementation. 2-Wire Multidrop Network using Terminating Resistors. ▪ ▪ ▪ ▪ ▪ Termination Resistors—are NOT included on the MD-xxHD meter. If the MD-xxHD meter is at the end of a daisy-chain, then connect a 120-ohm leaded resistor between the + and – terminal at the connector. Bias Resistors—are NOT included on the MD-xxHD meter.
Example LCD Navigation 49 Siemens Industry, Inc.
ViewPoint HD/MD-xxHD Web App If your MD-xxHD model does not include the LCD User Interface, or if you prefer to verify the installation using software, then verification is facilitated through the ViewPoint HD PC application or the MD-xxHD Web App which shares a common design. See the section on Configuration Details for an overview and list of instructional videos for ViewPoint HD or the MD-xxHD Web App.
Protocol Verification The network protocol is typically specified as part of the installation. BACnet MS/TP and Modbus RTU are the two communication protocols that operate over an RS-485 serial network and BACnet IP and Modbus TCP are the protocols over Ethernet. Each combination of interface and protocol require specific registers settings described below. The scope of this section is to use either the LCD interface or software tools to quickly confirm or change settings to match an existing specification.
Pulse Inputs – MD-12HD/MD-24HD/MD-48HD Only MD-12HD meters are equipped with 4 pulse inputs and MD-24HD/MD-48HD meters are equipped with two pulse inputs. Pulse counting supports accumulation of consumption data from any external meter using a dry contact (Form A Relay) or open collector outputs. The MD-xxHD pulse inputs are compatible with “low speed” meters. The pulse duration must exceed 50 mS in both the logic low and high state allowing for a maximum input frequency of 10 Hz.
12 Volt Auxiliary Power The MD-12HD, MD-24HD, and MD-48HD meters provide an auxiliary 12-volt output (200 mA max.) that is derived from an auxiliary winding on the MD-xxHD’s line-connected power supply. The 12-volt supply voltage is unregulated but protected by a self-resetting fuse. The purpose of the supply is to power external radio equipment or provide supply voltage for analog sensors, such as 4 to 20 mA current loop devices.
Using the Permission Registers The MD-xxHD meter uses both a “Read Only” register and a “Read/Write” register to compare against user entrees from the LCD keypad or MD-xxHD Web App form entry. Both internal permission registers have a default value of [0000]. A consequence of this is that both PIN registers need to be configured (i.e.
Verification of Installation Once the MD-xxHD meter is configured and communicating with the RTU, it is a good idea to perform some simple checks to ensure that all the CTs are on the correct voltage phases and that the CTs are facing the correct direction. The following are recommendations that work for typical installations. Special circuit conditions, like unloaded motors, may indicate an installation error when none exists. A Digital Multimeter (DMM) can be used to confirm these cases.
Phase Checking By Phasor Plot When a CT is installed on the incorrect phase, the indicated current vector is pointing either 180 degrees away (a split phase system) or 120 degrees away (a three-phase system) from the true displacement angle. In the latter case, this usually causes a significant decrease in the reported power factor, even if the CT is also on backwards. When the absolute displacement power factor of a load is below 0.
CT Orientation Check The MD-xxHD meter reports power and energy in each electrical quadrant under a different register. When CTs are installed backwards, the indicated current vector is oriented 180 degrees away from the true displacement angle. In accordance with standard definitions, the Wattage and VARs of the effected channel report with a sign opposite from what is expected. Often this means that the import registers will be reading zero while the export registers are showing a value.
Power Factor Convention Power Factor is the ratio of a signed number (true power) and an unsigned number (apparent power). This discrepancy has led to some customer confusion. The MD-xxHD meter allows users to select between two conventions (ANSI and IEEE). In the IEEE convention the sign of PF follows the sign of power itself. In the ANSI convention a “+” PF indicates a lagging current (inductive load) while a “–“ PF indicates a leading current (capacitive load).
Pre-Processing Aids The MD-xxHD has several registers that can aid in pre-processing or post-processing data that otherwise may need seconday operations. Snap Thresholds The signal to noise ratio of the MD-xxHD is above 80 db at full scale (1 part in 10,000). When the signal amplitude becomes so small that it is indistinguishable from noise it is often better to record 0 than a small random value.
RTU Programming and Scripting - Details This section is intended for the programmer of the RTU or host system and includes details about meter and element addressing, register locations, data formats and protocol examples. Register Organization The MD-xxHD meter communicates through the reading and writing of registers. Registers are organized into functional groups and are compliant with the SunSpec Modbus interface model.
System The term “System” refers to registers defining the characteristics of the entire circuit board. System registers report the same value independent of the slave address. Under BACnet structured view the system points are grouped together. Physical Implementation on Multi-Circuit HD Meters Starting in 2020, an update to the MD-12HD, MD-24HD, and MD-48HD circuit board has been implemented as a rolling change to accommodate two nomenclatures for CT identification.
Configurations 4 Wire 3 ɸ (Wye) Service Type 1 V_Input 1 or 2 Description 31 Char Channels Volt Ref CT Type Range Phase Shift CT Multiplier CT Sign CH1 L1 – N [1] mV [1] or RōCoil [2] Any > 0A -3.0˚ to +3.0˚ Any > 0 [1] 0 or 1 CH2 L2 – N [2] mV [1] or RōCoil [2] Any > 0A -3.0˚ to +3.0˚ Any > 0 [1] 0 or 1 CH3 L3 – N [3] mV [1] or RōCoil [2] Any > 0A -3.0˚ to +3.0˚ Any > 0 [1] 0 or 1 Any channel that needs to be turned OFF should set the CT Type to OFF [0].
Disabled (OFF) Service Type 5 V_Input 1 or 2 Description 31 Char Channels Volt Ref CT Type Range Phase Shift CT Multiplier CT Sign CH1 L1 – N [1] OFF [0] Any > 0A -3.0˚ to +3.0˚ Any > 0 [1] 0 or 1 CH2 L2 – N [2] OFF [0] Any > 0A -3.0˚ to +3.0˚ Any > 0 [1] 0 or 1 CH3 L3 – N [3] OFF [0] Any > 0A -3.0˚ to +3.0˚ Any > 0 [1] 0 or 1 Even though disabled channels are not used in calculations and report 0.0 they still contain configuration information.
Modbus String Entry Registers that are identified as “strings” are handled uniquely by the MD-xxHD power meter. Each register in the string block must be written to sequentially without interruption either by using a write multiple command or by sending single register commands back to back. The final character in the string MUST be a NUL character (ASCII 0). The meter will process the entire string only if these two conditions are met, otherwise the data is ignored.
String example 2: Element Description Change the Element Description from Mains Bld 100 to Mains Bld 101 It may be tempting to update only the character number “0” to “1” in the description, but this will NOT perform as expected. Internally, the meter uses a single string buffer for all string register blocks and unspecified entrees will continue to contain the previous buffer contents unless specifically written to.
VIA MODBUS TCP (ETHERNET) USING FUNCTION CODE 6 / WRITE SINGLE REGISTER TXNID 01 87 01 88 01 89 01 8A 01 8B 01 8C 01 8D 01 8E 01 8F 01 90 01 91 01 92 01 93 01 94 01 95 01 96 PROID 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 LENGT 00 06 00 06 00 06 00 06 00 06 00 06 00 06 00 06 00 06 00 06 00 06 00 06 00 06 00 06 00 06 00 06 ID 01 01 01 01 01 01 01 01 01 01 01 01 01 01 01 01 FC 06 06 06 06 06 06 06 06 06 06 06 06 06 06 06 06 ADDR 0A 39 0A 3A 0A 3B 0A 3
Floating Point Registry Entry The MD-xxHD meter uses 32-bit IEEE 754 formatted floating point numbers for reporting results and storing scalable user register values such as CT range, CT and PT scaling factors, etc. Because these registers require two 16-bit Modbus addresses to convey, these registers must be accessed as multiple registers or accessed sequentially without interruption.
b) ViewPoint HD. If an internet utility is not available, ViewPoint HD has a built-in conversion utility under the Advanced Tab. Enter 100.00 and press the Convert to Modbus Integers button. This utility identifies that the MSW and LSW registers need to be set to 17096 & 0 (decimal) respectively. If hexadecimal notation is required these decimal values can be converted using a utility such as the MS Windows Calculator (under Programmer mode) as shown below.
b) Connect to a MD-xxHD meter using ViewPoint HD. Navigate to the Meter Setup tab and press the ? icon. Hover over the Element A setup portion of the window. This launches the data exploring tool and indicates the addresses of the registers controlled or displayed by this window. The desired control registers are 2218 (MSW) and 2219 (LSW) Convert the register addresses of interest into hexadecimal notation (if required). STEP 3) Calculate the CRC-16 (Modbus RTU) for the expression.
Step 4) Putting it all together VIA MODBUS RTU (SERIAL) USING FUNCTION CODE 6 / WRITE SINGLE REGISTER ID FC ADDR DATA CRC (note CRC order is swapped) 01 06 08 AA 42 C8 9A BC 01 06 08 AB 00 00 FA 4A VIA MODBUS RTU (SERIAL) USING FUNCTION CODE 16 / WRITE MULTIPLE REGISTER ID FC ADDR #REGS LN DATA0 DATA CRC 01 10 08 AA 00 02 04 42 C8 00 00 8B EE VIA MODBUS TCP (ETHERNET) USING FUNCTION CODE 6 / WRITE SINGLE REGISTER TXNID PROID LENGT ID FC ADDR DATA (TXNID will be arbitrary) 01 87 00 00 00 06 01 06 08 AA 42
BACnet Building Automation and Control Network (BACnet) protocol was developed under the auspices of the American Society of Heating, Refrigerating and Air-Conditioning Engineers (ASHRAE) and is recognized as an American National, European, and ISO global standard. BACnet Device ID. All device IDs on a BACnet network must be unique.
Within each element, Structured View lists the BACnet objects by Object Type and then by numeric number as shown below. In addition objects for elements are grouped in a “hotel room” scheme. That is Element A (and system objects) have a range from 0-9999, Element B 10000-19999, Element 2000029999, to Element P on the MD-48HD 150000-15999. Some BACnet explorer tools have additional sorting capabilities.
Appendix A—MD-xxHD LCD Menu Navigation About Meter The complete LCD navigation map is shown in diagram form in the next few pages. The About Meter menu is the most commonly accessed item which requires 5 down presses or 1 up (rolling menu) to access. The About Meter menu contains the following items which are displayed 4 lines at a time and accessed by using the ˄ ˅ keys on the front display. Siemens Industry, Inc.
Menu Navigation (Multi Circuit MD-12HD, MD-24HD and MD-48HD Meters) Siemens Industry, inc.
Communication Navigation (Multi Circuit MD-12HD, MD-24HD and MD-48HD Meters) 75 Siemens Industry, Inc.
Navigation (MD-3HD Meters) kWH kW SYS:50.02 SYS:50.23 kVA kVAR SYS:50.02 SYS:50.23 V 2:120.4 1:120.2 3:120.2 A 2:4000 1:50.23 3:800.2 W 2:4000 1:50.23 3:800.2 kWH 2:445.3 1:453.2 3:543.2 VA 2:4000 1:50.23 3:800.2 VAR 2:4000 1:50.23 3:800.2 SYS aPF: 1.0 Pk Demand: 12874 CT1 Type: RoCoil Rating: 5000 CT2 Type: RoCoil Rating: 5000 CT3 Type: RoCoil Rating: 5000 SN: P031501001 FW: v2.10 RS485: 115200 Addr: 1 Protocol: BACnet 192.168.100.101 Siemens Industry, inc.
Appendix B—Enclosure Dimensions MD-24/-48HD Enclosure Dimensions 77 MD-12HD Enclosure Dimensions Siemens Industry, Inc.
MD-3HD Enclosure Dimensions MD-3HD DIN Rail Enclosure Dimensions Siemens Industry, inc.
Appendix C—Mounting Templates Enclosure Internal Mounting Hole Locations (Not to Scale) MD-24/-48HD Drill Template MD-12HD Drill Template MD-3HD Drill Template Siemens Industry, Inc.
Sheet Metal Plate Mounting Hole Locations (MD-12HD/MD-24HD/MD-48HD only) (Not to Scale) MD-48/24 HD Mounting Plate Drill Template Siemens Industry, inc.
Appendix D – CT Phase Shifts Most current transformers sold by Siemens have phase shifts from a few tenths of a degree up to a few degrees. For energy meters, this phase shift can produce accuracy errors. However, DENT’s ViewPoint HD software can compensate for CT phase shifts to help maximize reading accuracy.
Appendix E— MD-xxHD Technical Specifications Specification Description Service Types Single Phase, Split Phase, Three Phase-Four Wire (WYE), Three Phase-Three Wire (Delta) Voltage Channels 90-346 Volts AC Line-to-Neutral, 600V Line-to-Line, CAT III. Two voltage reference inputs (MD-48HD only) Current Channels 3 (MD-3HD), 12 (MD-12HD), 24 (MD-24HD) or 48 (MD-48HD) channels, 0.
Data Bits 8 Parity None, Even, Odd Stop Bit 2, 1 Termination None provided Data Formats Modbus RTU, BACnet MS/TP, Modbus TCP or BACnet IP Mechanical Wire Connections 12-22 AWG 600 Vac, Voltage connection must be #14 AWG or larger & 600 VAC rated Mounting Enclosure or Panel Mount High Voltage Cover IP30.
