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Artesis MCM User Manual

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MCM User's Manual
Artesis A.S. April 2004
For firmware versions 3.2.1 and greater
Document no: MCM 0018-OP-UM-EG-0003

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Summary of Contents for Artesis MCM

  • Page 1 MCM User’s Manual Artesis A.S. April 2004 For firmware versions 3.2.1 and greater Document no: MCM 0018-OP-UM-EG-0003...
  • Page 2 Neither Artesis AS nor its affiliates shall be liable to the purchaser of this product or third parties for damages, losses, costs, or expenses incurred by purchaser or third parties as a result of: accident, misuse or abuse of this product or unauthorized modifications, repairs, or alterations to this product, or failure to comply strictly Artesis AS’s operating and maintenance instructions.

  • Page 3: Table Of Contents

    Contents 1. Welcome to MCM Introduction Use of this manual 2. A quick guide to using MCM 3. MCM Installation Preliminary checks MCM unit Installation Current and Voltage Sensor Installation 3.3.1 Low voltage line driven systems 3.3.2 Low voltage inverter driven systems 3.3.3...
  • Page 4 5 Troubleshooting Introduction Use of the MCM Config utility Fault diagnosis Servicing Appendices MCM Error, alarm and warning conditions Current and voltage sensor selection Connection Diagrams Menu settings and parameters Edit Settings Menu items Flowcharts for MCM use Continuous device ratings Artesis AS MCM User’s Manual...

  • Page 5: Welcome To Mcm

    MCM User’s Manual 1. Welcome to MCM Introduction MCM is a revolutionary tool in the battle to keep electric motors and machinery running at peak performance, whilst maintaining high plant productivity levels. Used correctly, this unique instrument is capable of monitoring three phase AC motors of all...

  • Page 6: Use Of This Manual

    Use of this manual This manual explains the basic concepts needed to install and use MCM. The appendix at the end of the manual provides information that may be useful to the general user. For further, specific details please contact Artesis AS.

  • Page 7: A Quick Guide To Using Mcm

    Return to the IDLE state and run CHECK MOTOR. Any alarms issued by MCM should be rectified before proceeding further. g. Press CLEAR to return to the IDLE state and start MCM by selecting RUN. If the message Lose learn Data? Clear to exit appears, press ENTER.

  • Page 8: Mcm Installation

    Packing list. In the event of any missing or damaged items, please contact your supplier immediately. Check also that the power range of the MCM unit is suitable for the motor to be monitored. The device type can be found on the MCM label.

  • Page 9: Current And Voltage Sensor Installation

    Dangerous and lethal voltages can develop across the secondary terminals of open circuit current and voltage transformers. Before disconnecting any MCM unit to or from a current transformer, the secondary terminals of the transformer should be shorted using a link capable of carrying at several times the nominal output current (i.e.

  • Page 10: Low Voltage Inverter Driven Systems

    V at the rear of the unit. Note that MCM is not recommended for use with inverters operating at a chopping frequency lower than 5kHz. Please refer to the connection diagrams in the appendix at the end of this manual for further details.

  • Page 11: Medium/High Voltage Systems

    The secondary outputs from each transformer should be connected to the corresponding current measurement terminal pairs, I , on the rear of the MCM unit. If compensation capacitors are employed, it is essential that Using compensation the current transformers be placed between the motor and...

  • Page 12: Rear Panel Connections

    Connections to the MCM rear panel are given in the following figure. Lethal voltages can be present at the voltage and current terminals and it is vitally important that power is removed from both the motor and the MCM unit prior to any connections being REMOVE ALL POWER PRIOR changed.

  • Page 13: Applying Power To The Mcm Unit

    Applying power to the MCM unit Once the motor connections have been made to the rear panel, power should be applied to the unit. MCM requires between 85 and 240VAC obtained from a single phase, neutral and ground. At this stage, the Power indicator at the left of the front panel will light.

  • Page 14: Installing With Soft-Starter Systems

    MCM from modeling the properties of the motor itself. If MCM is to be used with such a system, it is essential that the maximum current limit of the starter be above the nominal running motor current so that it is bypassed effectively during all normal operation.

  • Page 15: Introduction

    4. MCM Use Introduction Use of MCM is both simple and straightforward once the basic concepts and principles are understood. This section of the manual is designed to introduce these concepts and to demonstrate how MCM is set up, how to check all the...
  • Page 16 Once the sensors have been connected and power has been applied to the MCM unit, the Power indicator light and the Liquid Crystal Display (LCD) on the front panel should both be lit. The LCD should display the message IDLE on the top line, indicating that the unit is idle and waiting input from the user.

  • Page 17: Configuring For Use

    Configuring for use When first installed, the MCM unit will be configured for the Master reset default, factory settings which will need to be changed prior to use. At later times, the factory settings can be restored by pressing and holding down the LEFT button for about 4 seconds...

  • Page 18: First Time Use

    Edit Settings. 4.3.2.1 First time use Before MCM can be used for the first time it is necessary to change various settings from their default values (a table outlining the MCM settings is shown in the appendix). Values relevant to the connected motor must be set for the quantities described in the following sections.

  • Page 19: Calibration Factors

    The value of this setting should be found from the motor installation documentation. Finally, if the MCM networking option is being used, it is recommended that the motor serial number (or any other short identifier string) be entered as a means of identifying the motor to the software.

  • Page 20: Communications Settings

    (i.e. SCADA software), please refer to its documentation for communication settings. MCM can use both 2 and 4 wire (RS 422 and RS485 standards respectively) communications at up to 19200 Baud. Please refer to section 4.4.12 for further information.
  • Page 21 It is therefore important to ascertain the cause of the alarm at the earliest opportunity. An alarm is indicated on the front panel of MCM by the message Viewing alarm messages Alarm followed by a hexadecimal value. The bits of the hexadecimal value refer to which alarm is raised.

  • Page 22: Running Check Motor

    V and I channels is appropriate. If MCM detects that some condition is not met, an alarm is raised which the user should investigate and remedy before proceeding further. Check mode command...

  • Page 23: Setting And Checking The Input Connections

    MCM device. Using the software it is possible to upload and display the voltage and current waveforms measured by MCM. Inspection of these waveforms can reveal problems caused by missing phases, phase ordering, phase imbalance etc.

  • Page 24: Running Learn And Improve

    It is thus important to enter an accurate value for particular, the nominal current the nominal current. Even so, it is still possible for MCM to choose the wrong solution which will yield unrealistic values for the phase angle when the loading on the motor changes in use.
  • Page 25 This is the main operating mode and MCM is expected to spend most of its time in this mode monitoring attached motor systems. In order to start monitoring, MCM must first have learnt the characteristics of the motor it is to monitor and have a valid learning mode.
  • Page 26 The voltage frequency is expected to be constant (within well defined limits) for direct line driven motors, but can vary considerably when an inverter is used. MCM can handle the range of frequencies typical of an inverter, but first needs to learn the motor at a single frequency representative of the conditions it will meet in practice.

  • Page 27: Running Resume And Update

    RESUME from the main menu, which will cause MCM to continue in its incomplete mode at the point of interruption. Thus if it is necessary to stop MCM for any reason, it can be restarted without affecting any existing data.

  • Page 28: Advanced Use

    A value between 1000 - 2000 is recommended Flash update rate MCM does not update the flash with new values at each iteration, as this could shorten the flash lifetime. On the other hand, the longer data are stored in volatile memory, the greater the potential for data loss if power fails.

  • Page 29: Theory Of Operation

    When obtaining data, MCM requires relatively unchanging current signals. If the variation in the amplitude of the current exceeds this threshold, MCM will reject the data. The alarm UNSTABLE LINE is often seen when the current stability is set too low...
  • Page 30 Thus the technique is sensitive not only to electrical problems but to many mechanical ones as well. While monitoring, MCM processes the acquired motor data and compares the results to the data stored in its internal database at the end of the LEARN phase, which we shall refer to as the reference model.

  • Page 31: Interpreting Mcm Fault Indications

    As mentioned above measure of the quality of the model is provided by the two extra parameters known as Fit Parameters 1 and 2. These can be viewed from the MCM front panel by scrolling through the physical parameter values using the UP and DOWN arrow buttons, or from the Physical Parameter table over the serial link.
  • Page 32 Artesis AS MCM User’s Manual MCM 0018-OP-UM-EG-0003...
  • Page 33 Artesis AS MCM User’s Manual MCM 0018-OP-UM-EG-0003...

  • Page 34: Changes In Line Voltages

    The motor status values displayed on the front panel of the MCM unit and reported by the MCMScada monitoring software are actually the values of the Motor Status 2 parameter.

  • Page 35: Load Changes

    In such cases, the user should send MCM to the UPDATE mode so that it will learn the new loading conditions. When no obvious cause can be found, it...

  • Page 36: Using The Relay Output

    Please refer to the appendix for a full list of error messages. MCM indicates an error to the user by the string Error on the Viewing error messages and first line of the display followed by the error string on the lower numbers line.

  • Page 37: Connecting To The Serial Port

    Closed 4.4.12 Connecting to the serial port MCM can be connected to a PLC or other monitoring system such as MCMScada via the RS485 port on the rear of the device. Artesis A.S. makes available its proprietary protocol on request in...
  • Page 38 RS 422 port connections Description Notes Receive A For 2-wires connect to Tx+ Receive B For 2-wires connect to Tx- Transmit A Transmit B Common Optional connection to local ground via 100 Ω resistor Artesis AS MCM User’s Manual MCM 0018-OP-UM-EG-0003...
  • Page 39 Terminating resistors across Rx and Tx terminals of last device Connecting devices to a RS485 2-wire network Device #1 Device # 2 Device # n RS232 connection to monitoring Terminating resistor across last device Artesis AS MCM User’s Manual MCM 0018-OP-UM-EG-0003...
  • Page 40 MCM device. In some cases, particularly with slow PC hosts that do not release the transmit line rapidly; it may be necessary for the MCM device to delay its response. This can be achieved by adjusting the value of the menu setting: MENU: Edit Settings/Comm.
  • Page 41 The MCM Config software is a simple test utility provided by Artesis for examination of waveforms, and can connect to a single MCM unit using the RS485 serial line on the rear of the instrument. If a network is available, MCM Config can be installed on the host computer, otherwise a portable laptop machine equipped with a suitable RS232 –...
  • Page 42 • Select the pc communications settings by pressing the Communications button at the top of the view, set the baud rate equal to that of the MCM unit and set the port being used by the pc. • Set the MCM device address.
  • Page 43 The following waveforms are scaled. Voltage waveforms Artesis AS MCM User’s Manual MCM 0018-OP-UM-EG-0003...

  • Page 44: Fault Diagnosis

    –30 and +60º. In either case, check that the motor topology has correctly been entered on the MCM front panel and that the currents do indeed correspond to the correct voltages. It is important to perform this test with the motor under loaded conditions as loading can significantly affect the measured phase angle.
  • Page 45 For current channels, try replacing or swapping the sensor with another one. If the new sensor does not work the problem is internal to the MCM unit and it should be returned to Artesis. • If any phase has a marked difference in amplitude to other similar phases, the calibration constant for that phase should be checked.

  • Page 46: Servicing

    Servicing MCM contains no user serviceable parts and must be returned to either Artesis A.S. or its designated agents if repair is needed. Artesis AS MCM User’s Manual MCM 0018-OP-UM-EG-0003...

  • Page 47: Mcm Error, Alarm And Warning Conditions

    Appendices Appendix 1: MCM Error, alarm and warning conditions Error conditions Format: First byte – Minor code Second byte – Error type Error types Error number Error type Description 0x010000 Memory allocation The dynamic memory manager failed in a request...
  • Page 48 General fault consisting of one or more of: No data obtained, no zero crossings detected, perfect phase balance (voltage or current) 0x20000 Phase ordering The phase ordering used by MCM is incorrect and must be rectified. 0x40000 Phase fault Voltage phase angles incompatible with 120º...
  • Page 49 Frequency range (CHECK MOTOR and LEARN only). The measured frequency differed from the nominal value. During the learning period, MCM learns the motor only at the dominant frequency. In inverter driven systems, it is important to set the nominal frequency to this dominant frequency otherwise, MCM may never complete the learning period.

  • Page 50: Current And Voltage Sensor Selection

    70 - 90V at a nominal motor primary voltage. Failure to do so will result in a loss of sensitivity and the ability of MCM to detect motor degradation or change.
  • Page 51 Current and voltage transformer specifications Current transformers Upper Class Secondary output Standards Voltage (kV) range (A) ANSI 0.72 60044-1 57.13 1851987 CS71978 17.5 Voltage transformers Upper Class Secondary Standards voltage (kV) output (V) 0-100 1861987 Artesis AS MCM User’s Manual MCM 0018-OP-UM-EG-0003...

  • Page 52: Connection Diagrams

    Appendix 3: Connection Diagrams Connection diagram for low voltage line driven motors Connection diagram for low voltage motors systems employing a soft-starter Artesis AS MCM User’s Manual MCM 0018-OP-UM-EG-0003...
  • Page 53 Connection diagram for low current (up to 200A), low voltage, inverter driven motors Connection diagram for high current, low voltage, inverter driven motors Artesis AS MCM User’s Manual MCM 0018-OP-UM-EG-0003...
  • Page 54 Connection diagram for medium/high voltage motors Connection diagram for medium/high voltage, Aron connected motors Artesis AS MCM User’s Manual MCM 0018-OP-UM-EG-0003...
  • Page 55 Artesis AS MCM User’s Manual MCM 0018-OP-UM-EG-0003...

  • Page 56: Menu Settings And Parameters

    Current instability Power range RMS Voltage 2 13. Harmonic Load threshold Crystal freq RMS Voltage 3 Signal select RMS Current 1 Harmonic calc RMS Current 2 RMS Current 3 Line frequency Phase ordering Artesis AS MCM User’s Manual MCM 0018-OP-UM-EG-0003...

  • Page 57: Edit Settings Menu Items

    Display only Harmonic % Display only Harmonic % Display only Harmonic % Display only Signal select The input channel selected for harmonic measurements Edit/Display V1/V2/V3 I1/I2/I3 Harmonic calc Switch harmonic calculations On/Off Edit/Display ON/OFF Artesis AS MCM User’s Manual MCM 0018-OP-UM-EG-0003...
  • Page 58 7/8/9 Stop bits Number of bits indicating end of transmitted frame Edit/Display Response delay Delay (in ms) before MCM will respond to an input command. Edit/Display 0 – 9 Motor settings Nominal voltage Nominal motor phase – neutral working voltage Edit/Display 0.1 –...
  • Page 59 Reset will allow the relay to close at the end of the current Examine2 iteration when if the condition has not been cleared Phase ordering Phase override Override the phase ordering determined automatically MCM during Edit/Display ON/OFF CHECK MOTOR. If set, the order can be changed manually from the following item Phase order The current phase ordering.

  • Page 60: Flowcharts For Mcm Use

    Appendix 6: Flowcharts for MCM use Running MCM: Edit Settings and Check Motor Start Check cabling and power connections Run motor system and switch on power to Does MCM initialize? Enter EDIT SETTINGS and provide (at least) the following settings: •...
  • Page 61 Running MCM: New Learn Motor system is connected correctly and can Check motor and MCM cabling, be run power etc. Adjust the Learn Iterations if necessary. Rectify alarm conditions Select Run from the main menu to start the learning mode...
  • Page 62 Running MCM: MONITOR / IMPROVE / UPDATE Have valid LEARN and can proceed to monitor motor Select Resume from main menu Rectify alarm conditions Alarm condition ? Did MONITOR Did LEARN or IMPROVE start? start? Resume started properly. MCM is now LEARN not properly completed.
  • Page 63 High Current: The current on the specified channel is out of range • Adjust threshold • Investigate reasons for out of range currents Motor not running: MCM measures one or more current phases to be less than the no-current threshold, indicating that the attached motor is not running •...
  • Page 64 • Increase Current Instability parameter • If the condition persists, contact Artesis AS General fault: MCM cannot process the data for some reason. This is usually caused by non-sinusoidal signals or signals not crossing through zero •...
  • Page 65 • Check input currents and voltages to both the motor and MCM • If the condition persists, contact Artesis AS Range fault: MCM detected an illegal value for an input setting or calculated parameter. This condition is often the result of other alarms •...

  • Page 66: Continuous Device Ratings

    Input line 50/60 1,2,3 frequency DC Input voltage 1,2,3 N, L Number MCM version MCM part numbers MCM low voltage/line versions MCM01L1-E-380-NS MCM01L1-E-480-NS MCM inverter versions MCM01L0-E-380-XX MCM01L0-E-480-XX MCM Medium/High voltage versions MCM01H-E-L Artesis AS MCM User’s Manual MCM 0018-OP-UM-EG-0003...

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