- Eurotherm by Schneider Electric
Contents
1. Eurotherm Monitoring and Acquisition unit EMA RM S current and voltage measurement with digital communications User manual O Copyright Eurotherm Automation 1999 All rights reserved All reproduction or transmission in any form whatsoever and using any procedure electronic or mechanical including photocopying and recording without written permission from Eurotherm is strictly prohibited EUROTHERM AUTOMATION has taken particular care to ensure that these specifications are correct However in order to maintain our leading edge we continually strive to improve our products which may lead to modifications or omissions in the specifications We shall not be held responsible for any damage injury losses or expenses incurred as a result of such modifications Ref HA 176140 ENG Issue 2 1 Printed in France 07 2000 EMA User M anual EMA USER MANUAL CON TEN TS Page Applicable European Directives es iv 1 Identification of the monitoring Unit 14 2 Installation rrr 24 3 Digital Communication nnn 34 4 Configuration and display isses 4 1 Eurotherm address i n 4 16 For a detailed description of the digital communications used by EMA units Profibus DP and Modbus protocols see the manual EMA Digital Communication ref HA 176197 ENG issue 2 0 EMA User M anual iii L K APPLICABLE EUROPEAN DIRECTIVES CE marking2. 00 1 Supply voltage 4 Number of current voltage channels 115 volts 230 volts 2 Communication protocol 2 current measurement channels and 2 voltage measurement channels 4 current measurement channels and 4 voltage measurement channels 5 current measurement channels and 5 voltage measurement channels 5 Current input rating Profibus DP Modbus 3 Transmission rate 1 amp 5 amps 6 Manual language Modbus protocol Read only at 9 6 kbaud Read only at 19 2 kbaud Profibus protocol Read only up to 1 5 Mbaud O rdering code example Installation French English 7 Option IP65 protective cover for front panel EMA monitoring unit with configuration software Supply voltage Communication protocol Number of measurement channels Current input rating Manual shipped Protection O rdering code 230 V Profibus DP 10 5 voltage and 5 current 1A English IP65 front panel protection EMA 230V PFP RAUT 515V 1A ENG IP65 00 14 EMA User M anual Chapter 2 IN STA LLA TIO N Contents Page Safety during installation 0 0 0 0 eee eee eee 2 2 DIMENSIONS gt veia ta a Slew Aa bw Me ba eee bees ae AA te oi 2 3 Mo nting tai RO Rer re eae e ERR 2 4 Front paneles ue ei US LI m M EE TR eee OREN 2 5 Rear panel cada a eau eR S 2 6 A o Hp eI EIR SE RR RR I ES eei Ea PE RES 2 7 Auxiliary supply terminal block eaaa 2 7 Protective earth c
3. 11message pages describing the state of the unit and communications A push button is used to scroll through the various pages Monitoring unit The first display page shows the unit s identification name tag 16 characters on the first line bus address 16 characters on the second line This page is displayed as soon as the unit is switched on The information on the identification page corresponds to the monitoring unit configuration Example 1 Default configuration Monitoring unit name EMA Address of unit on communications bus 32 decimal EMA j Adidirjejsis 32 Figure 4 6 Monitoring unit default identification message Example 2 Reconfiguration by user Monitoring unit associated with furnace 8 heating zone 3 Address of unit on communications bus 52 decimal the example corresponds to the general configuration shown in figure 4 2 Furnace 8 Ze ne 3 Address Bjo Figure 4 7 Monitoring unit identification message with customer identification EMA User Manual 4 13 M easurement channels Display pages 2 to 11 include the following information the channel identification first 8 characters of first line the communications status in Profibus mode e g DXCQ or the protocol type in Modbus mode characters 9 to 16 of first line measured value and measurement unit first 8 characters of second line threshold overshoot alarms with messages s
4. resistive load controlled by a power thyristor unit e g TE10P MEA rem panel A fine di i one chemel 1 TEL T a vakage 1i H Ere aar esent 1i 1 inpar s d uu Ln cure db isl mem A AA aes menmurement gt 1142 purs Panal ur eoi Ir an sec DL Figure 2 6 Example showing wiring of voltage and current inputs for a resistive load controlled by a thyristor unit 2 10 EMA User Manual Digital communication wiring Communication bus wiring and shield grounding Caution The digital communications bus should be connected with shielded twisted pairs The A communication bus shield should be grounded at both ends to ensure maximum immunity to electromagnetic interference To simplify grounding of the communications cable shield a metal ferrule may be used connected to the protective earth by a return wire see figure 2 8 To wire the communication bus and ground the shield proceed as follows Strip the shielded cable as shown on figure 2 7 The wires must be long enough to enable them to be connected to the communications terminal block Insert the cable into the ferrule so that the shield is in contact with the metal ferrule see figure 2 8 Crimp the ferrule to the ground return terminal terminal 65 PE see figure 2 8 A 77 LA hrs gt AA T Figure 2 7 Bus cable stripping for shield grounding The ma
5. 98 or NT required A standard RS232c serial port on the PC with the configuration program installed should be connected to the 9 pin female Sub D connector labelled Configuration on the EMA front panel A Male Female direct pin to pin cable should be used The PC s serial port should be configured as follows transmission rate 19 2 kbaud number of data bits 8 stop bits 1 parity bits none flow control none The details of this configuration are given in the Readme file on the program diskette The configuration program enables the user to save any configuration file on the PC and retrieve saved configuration files to configure other units with an identical configuration Configuration files may be displayed on screen or printed see control buttons 44 EMA user manual Default configuration General configuration Two parameters which describe the general characteristics of the EMA are configured by default in the factory the identification of the monitoring unit set by default to EMA the address of the monitoring unit on the bus set by default to 32 decimal The EMA s identification can be reconfigured if necessary to contain another unit name the identification of the installation monitored and or other information determined by the user see examples below 16 characters are reserved for the identification The monitoring unit s identification may be reconfigured u
6. A User M anual 25 REAR PAN EL The following plug in terminal blocks are located on the rear panel power supply and protective earth measurement inputs digital communications gut conasctare Tia 1454 F Figure 2 4 EMA rear panel A description of the terminals is given on the following pa ges together with the wiring for protective earth auxiliary power supply current and voltage measurements digital communication 2 6 EMA User M anual W IRIN G The monitoring unit is wired on the rear panel terminal blocks except for the configuration socket Important AN Plug in terminal blocks are used there is no need to open the unit Connectors for wiring the power supply measurement inputs and digital communication are supplied with the unit The connector terminals are numbered as shown on the label on the top of the EMA unit see figure 1 1 Plug in terminal block Terminal capacity Tightening Stripping length mm torque N m mm Power supply Voltage inputs Current inputs Digital communication Table 2 1 W iring details Caution The cross section of the wiring conductors must meet the IEC 943 standard The voltage drop in the current input leads must be low enough to match the precision class for the external current transformer Auxiliary supply terminal block The EMA protective earth and power supply are connected to the AUX terminal block Termi
7. Figure 4 4 Configuration screen for channels V5 and 15 Modbus or Profibus EMA User M anual 4 11 Control buttons The buttons at the top of the configuration screen see figure 4 5 are used for the seven control operations Figure 4 5 Control buttons Open This button loads the complete configuration for an EMA unit Save This button saves the configuration defined for an EMA unit to disk for later re use e g cloning Print Produces a paper copy of the complete configuration defined Clipboard Inserts an image of the current sheet onto the clipboard Upload Retrieves the complete configuration from the EMAunit connected to allow cloning modification saving or printing Download This command sends the configuration defined into the EMA unit opposite of the previous operation To enable the parameters transmitted to be fully stored wait for 10 seconds after downloading before switching off the EMA Summary Displays the configuration defined on one text page This command does not allow the configuration parameters to be changed To obtain a summary of the configuration for the unit connected to the configuration PC first perform an upload 4 12 EMA user manual LO CAL DISPLA Y The local display presents information for the EMA monitoring unit for each of the 10 measurement channels 5 voltage and 5 current The LCD display has 2 lines of 16 characters The display has
8. S Protocol UE New Address 50 PEE onta 19900 Party 1 247 None Cven Modbus lime Cul Enable Disable QK Device Tag Furnace number 8 biat gt chanact E UL E Dis vite 3b IR raban ation EHA lamb no Figure 4 3 Screen capture showing protocol and program language configuration M odbus protocol 4 10 EMA user manual Example 3 Measurement channels The voltage and current measurement channels with the same number 1 to 5 are configured on the same page in the program Channel 5 Voltage Identification of channel V5 Voltage measurement for resistor 21 Voltage scale adjustment 100 Voltage threshold alarms Low threshold 200 V High threshold 250 V Measurement integration time 20 s Channel 5 Current Identification of channel I5 Current measurement for resistor 13 Current scale adjustment 300 A Current threshold alarms Low threshold 25 A High threshold 290 A Measurement integration time 1 s The corresponding screen is shown in figure 4 4 EMALembmzaius AE m mm em el Ej General Channel I Channel 2 Channel 3 Channel 4 Channel 5 Voltage Mas ct En Tag J res 21 High Threshold 250 y Scale Adjustment foo o Low Tmrechora 00 y integration Time 20 E seconds Current TIAS Ha rhe z Tag rae 13 High Threshold 2890 i A Scale Adjustment 300 A Low Threshold 25 JA Integration Time i 2 seconds rum ag Espias ica 35 Core E 1 qe ed
9. al units are fitted in the same cabinet arrange them such that hot air from one unit is not drawn into the unit above AN Caution Overheating may lead to incorrect operation This may in turn cause dama ge to the components W iring Danger fe Wiring must be performed by qualified staff authorised to work on low voltage industrial electrical facilities Before connecting or disconnecting the unit check that power and control cables and leads are isolated from voltage sources The protective earth must be connected before any other connections are made and should be the last cable to be disconnected It is the user s responsibility to wire and protect the facility according to best practice and applicable standards A suitable device ensuring that the unit can be electrically separated from the supply must be installed upline to enable work to be performed safely Commissioning Danger The EMA s internal circuitry includes components at dangerous voltages when the unit is connected to the power supply and to measurement points Users must not access internal components Important AN Eurotherm Automation shall not be held responsible for any damage or injury losses or expenses incurred due to inappropriate use of the product or failure to comply with the instructions in this manual Users are therefore responsible for checking before commissioning that all the EMA unit s rated values correspond to the conditions of u
10. an LED eee LED Cno LED Coscaranicaticn gate Comenanication sale Recehre Tranpak Figure 3 3 Layout of LEDs on EMA front panel Communications LEDs When the green LED Data Exch is lit the communication processor is sending data on the bus DXCHG phase The red LED Wait Fail flashes during the initialisation phase Once this phase is complete it indicates the state of communications Red LED lit Serious error Red LED flashing Profibus DP waiting for parameter settings or configuration flashes at the same rate as during initialisation Modbus Waiting for communication Red LED off No power supply or Data transfer DXCHG in progress Transmission LEDs The green LED Rx is lit when data is being received The red LED Tx is lit when data is being transmitted Important For further information please consult the EMA Communication Manual ref HA176197 ENG 3 8 EMA User Manual Chapter 4 CONFIGURATION AND DISPLA Y Contents Page Configuration nca RE ERE che Ree Re UE ES 4 2 Types of configuration 1 2 0 0 0 cece eee eee 4 2 Hardware configuration of monitoring unit 4 2 Flow chart eene COR e eg mette 4 3 Software configuration of monitoring unit sese 4 4 Configuration program eurre re rener 4 4 Default configuration llle 4 5 General configuration suesue euneun runer 4 5 Measurement channel conf
11. and safety EMA products installed and used in compliance with this user manual meet the essential requirements of the European Low Voltage Directive 73 23 EEC dated 19 February 1973 modified by Directive 93 68 EEC dated 22 July 1993 ELECTROMAGNETIC COMP ATIBILITY EMC Electromagnetic compatibility is defined for industrial environments only not for domestic environments EMA products installed and used in compliance with this user manual are certified compliant with the following EMC test standards A system incorporating these products may be certified compliant with the EMC Directive as far as EMA products are concerned Test standards Test EMC test standard Immunity Generic standard EN50082 2 Electrostatic discharge EN 61000 4 2 06 1995 Fast transients EN 61000 4 4 01 1995 Electromagnetic fields EN 61000 4 3 and ENV 50204 Radio frequencies in common mode EN 61000 4 6 Emission Generic standard EN 50081 2 Radiated and conducted EN 55011 Class A 1991 iv EMA User Manual Declaration of conformity Availability A declaration of CE conformity is available on request Validation by competent body Eurotherm Automation has validated the compliance of EMA products with the European Low Voltage Directive and EMC test standards through product design and laboratory testing The tests performed on EMA products are listed in a Technical Construction File validated by the LCIE Laboratoire Centra
12. anel i i i pre ey Figure 2 12 Commissioning flow chart EMA User M anual 2 15 Checking the characteristics Caution Before powering up make sure that the product code corresponds to the code ordered AN and that the characteristics of the EMA unit are compatible with the facility Mains supply and voltage measurement inputs The frequency of the supply must be the same as the frequency of measured inputs The nominal value of the supply voltage must be compatible with the voltage configured in the factory as ordered The rms voltage measured must not exceed the maximum rms value accepted by the EMA 550 V Caution Never use the EMA unit with a supply voltage greater than the specified value as this AN could damage protection components and or internal circuitr y Checking the wiring Danger Before checking the wiring ensure that the measurement and control cables are isolated from voltage sources Check that the protective earth cable is connected to the unit s earth terminal Danger The wiring must be checked by personnel authorised to work with low voltage equipment HAN in an industrial environment Check that a suitable device ensuring that the unit can be electrically separated from the supply is installed upline to enable work to be performed safel y Powering up Caution The monitoring unit power supply should be powered up before or at the same time as AN
13. be modified by the user They represent the EMA s physical configuration 4 2 EMA user manual Flow char t EMA Cua rizo el mire sar Describe de ids Undead n dim Lin rot Cola qo UT Figure 4 1 EMA monitoring unit configuration flow chart EMA User M anual 4 3 Software configuration of monitoring unit Configuration program The EMA monitoring unit is configured using a configuration program supplied as standard with the EMA on a 312 diskette The program on the diskette is available in the following languages French English German Spanish and Italian Important If the configuration program language is changed all the configurable parameters are restored to their default values factory configuration This configuration program enables the configuration parameters to be entered without needing to use codes while Profibus or Modbus communication is acti ve ON LINE The parameters configured are then loaded into the monitoring unit The configuration program can set the following parameters for both Profibus and Modbus monitoring unit address various identifiers scale adjustment 75 to 125 for voltage measurement channels 1A to 20000 A for current measurement channels high and low alarm thresholds integration time The following parameters can only be set for the Modbus protocol baud rate parity time out The configuration program runs on a PC Windows 95
14. channels and circuits Double isolation up to 500 Vac Between current measurement channels on a single connector Single isolation up to 500 Vac Complies with the requirements of the European Low Voltage Directive and standards EN 50178 and IEC 664 1 Over voltage category III 0 C to 45 C at a maximum altitude of 2000 m 10 C to 70 C Non explosive non corrosive and non conductive Pollution degree 2 RH from 5 to 95 non condensing and non streaming IP20 in accordance with IEC 529 IP65 for front panel option Must comply with IEC 364 Height 72 mm Width 156 mm Depth 227 mm 1 5 kg Important For loads with a high starting current large variations in resistance depending on temperature e g Molybdenum Molybdenum disilicide Tungsten or motors check that the peak current measured does not exceed the maximum peak value specified Warning our leading edge we continually strive to improve our products which may lead to modifications or omissions in the EUROTHERMhas taken particular care to ensure that these specifications are correct However in order to maintain specifications We shall not be held responsible for any damage injury losses or expenses incurred as a result of such modifications EMA User Manual 15 ORDERING CODE EMA voltage protocol Supply Communication Transmission Number of Current input Manual rate I V channels rating language Option
15. de The monitoring unit al ways operates as a Slave and the supervision system or PLC acts as Master All exchanges involve a request from the master and a response from the slave Figure 3 1 Organisation of data transfers 32 EMA User Manual PRO FIBUS DP PRO TO COL Specifications for the PROFIBUS DP Process Field Bus Decentralized Periphery protocol are defined in the following standards EN 50170 DIN 19245 Part 3 Important A detailed description of Profibus DP operation is given in the EMA Communication Manual ref HA176197 ENG Transmission frames use binary characters with even parity Character format 1 start bit 8 data bits 1 parity bit 1 stop bit The following transmission rates are available 9 6 19 2 93 75 187 5 500 and 1500 kbaud with auto baud rate detection Addressing The physical address address of the monitoring unit on the bus used is set by configuration either using the supplied configuration program for a PC running Windows 95 98 or NT orusing the Profibus Set Slave Address function from the link Master provided the monitoring unit is the only device on the bus and is in the wait for parameters phase WPRM Important 32 decimal This address may be reconfigured by the user After the EMA s address is changed the new address is only taken into account after the unit is next powered up T As shipped from the factory the defa
16. e wait for configuration message phase WCFG The configuration message specifies the structure of the input and output buffers Parameter setting Set Prm and diagnostic requests Slave Diag are permitted Any other type of message will be rejected during the wait for configuration phase In a given installation the monitoring unit can only receive a configuration change message Check Cfg from the master which set its parameters 34 EMA User Manual BERVICERK DATA TRANSFERS Renet md coc Choad wd digitos Figure 3 2 State diagram for read write procedure using Profibus DP protocol EMA User M anual 35 Data transfer Once the parameter settings and configuration have been accepted in the data exchange phase DXCHG the EMA monitoring unit is ready to send data to the master which set its parameters and configured it The following types of data may be transferred during the DXCHG phase Diagnostic Slave Diag Parameter settings and Configuration Read configuration Get Cfg Check configuration Check Cfg Set parameters Set Prm Process data transfer Request and response Data Exchange Multiple data read Read Input rarely used Read back outputs Read Output rarely used e Control of transmission modes Global Control 36 EMA User Manual MODBUS PROTOCOL The Modbus protocol is a binary serial or RTU protocol Important A detailed descrip
17. ends on the characteristic impedance of the line R 120 Q to 220 Q Polarisation resistors are used to set the output state of the receivers when at rest no communication Two mini switches SW1 1 and SW1 2 are provided on the EMA communications bus to insert three internal resistors at the end of the bus for matching and polarisation They are located on the rear panel between the communications and AUX terminal blocks Figure 2 11 Internal connections of matching and polarisation resistors Caution Mini switches SW1 1 and SW1 2 are set to OFF when shipped from the factory AN If the EMA monitoring unit is the only unit on the bus or is the last unit connected to the communication bus at the end of the bus set mini switches SW1 1 and SW1 2 to ON f the EMA monitoring unit is not the only unit on the bus or is not the last unit connected to the communication bus at the end of the bus set mini switches SW1 1 and SW1 2 to OFF 2 14 EMA User Manual COMMISSIO N IN G Flow char t Commissioning simply involves powering up the unit after installing wiring and checking the characteristics of the unit in accordance with this manual Two types of message page will be displayed after powering up the auxiliary power supply the EMA identification page is displayed after connecting the measurement signals the pages for each channel can be displayed by scrolling using the push button on the front p
18. filtering Power supply Mains supply Consumption Protection Local display Monitoring unit Measurement channel Digital communication Protocol Transmission speed Bus Diagnostics 1 A rating 0 01 to 1 1 A 5A rating 0 05 to 5 5 A 1 A rating 1 6 A 5 A rating 8 0 A 5 V to 550 V with peak voltage range 800 V Up to 10 measurements Modularity by pairs of voltage current measurements 5 current and 5 voltage measurement channels Display scale configurable from 1 A to 20 000 A direct reading with external current transformer Autoranging In burst firing advanced single cycle or phase angle modes with a thyristor firing angle gt 25 0 5 of measurement 0 1 of full scale the voltage scales are 35 V V lt 35 V or 500 V V gt 35 V the current scales for the 1 A input are 0 07 A I lt 0 07 A or 1A 12 0 07 A the current scales for the 5 A input are 0 95 A 1 lt 0 95 A or 5 A I2 0 95 A If current or voltage transformers are used the precision of the transformer must be taken into account to obtain the overall measurement precision 47 Hz to 63Hz Configurable from 1 s to 1300 s 115 Vac or 230 Vac depending on product code Frequency 47 Hz f 63 Hz same frequency as measurements 18 VA 0 5 A internal fuse and varistor Unit identification name destination bus address Identification by scrolling for each channel of variable name 8 characters value measured and mea
19. hown in table 4 3 characters 9 to 16 of second line Alarm type Display Message Value monitored Threshold Voltage Low UnDer Voltage High OVer Voltage Current Low UnDer Current High OVer Current Voltage and current No overshoot value greater than low threshold and less than high threshold Table 4 3 Alarm messages Example measurement displays Example 1 The example corresponds to the current measurement channel configuration shown in figure 4 4 eaj S 0A lok Figure 4 8 Example message display page for current channel Description of display page Channel identification I Res 13 resistor 13 current measurement Communication protocol Profibus Bus state Data eXChanGe DXCG Current measured 92 3 A No alarms 4 14 EMA user manual Example 2 The identification and alarms for the channel correspond to figure 4 4 V Res 21 MODBUS 181j 3V upv Figure 4 9 Messages for voltage channel in alarm state Description of display page Channel identification V res 21 resistor 21 voltage measurement Communication protocol Modbus Voltage measured 151 3 V Under low voltage threshold UDV Example 3 Current threshold alarm Es z9 12 pixie Figure 4 10 Messages for current channel in alarm state Description of display page Channel identification F5 Z3 I2 furnace 5 zone 3 current measurement chan
20. hrough the display measurements measurements alarms identification The display enables the user to read the measurements and quickly diagnose the state of the unit A space is provided to enable the user to affix an identification tag The following features are located on the rear panel plug in connectors for measurement signals power supply and digital communications mini switches for configuring bus termination resistors The EMA unit measures to an accuracy of 0 5 of the measurement 0 1 of full scale rms currents in the range 0 01 A to 1 1 A or 0 05 A to 5 5 A rms voltages from 5 V to 550 V For values exceeding 110 of the full scale the measurement will necessarily be false as the unit clips the signal and displays the maximum value of the measurement range For each channel alarms are signalled on the display and via the digital communication if the upper or lower thresholds are exceeded If the EMA unit is to be reconfigured by the customer configuration software is required This software supplied as standard on 3 2 disks operates on a PC running Windows 95 98 or NT 12 EMA User M anual Figure 1 1 Overview of EMA monitoring unit EMA User M anual SPECIFICATIO N S Inputs RMS current Max instantaneous peak current RMS voltage Number of measurement channels Measurements Current Voltage Intrinsic precision Frequency of signals measured Integration time
21. if in doubt please contact your local Eurotherm office where qualified staff are available to advise you or assist with commissioning your facility vi EMA User M anual Chapter 1 IDEN TIFICATION OF THE MONITORING UNIT Contents Page General presentation 00 cece cee eee 1 2 Technical specifications 2 0 ET eee nett 1 4 Ordering code onc hci ds Se ee Se RG RRR etu ee RE CD cae ep 1 6 Example ordering code cs s gu ger Rx e e eS 1 6 EMA User M anual 1 1 GENERAL PRESENT ATION The EMA monitoring and acquisition unit is designed to measure rms currents and voltages such as those found on loads controlled by thyristor units with the following firing modes firing angle variation Phase angle mode see specifications for details supply voltage modulation Burst firing mode supply voltage modulation with a single firing period and one or a half cycle of non firing Single cycle and Advanced single cycle modes The measurements are available on the unit s front panel display remotely via the digital communication bus Depending on the model a maximum of 5 voltage measurements and 5 current measurements are possible The following features are located on the front panel e a two line by 16 character LCD display a female DB9 connector for configuration by PC using the RS232 standard diagnostic LEDs indicating communication operation a button for scrolling t
22. iguration 4 6 Scale adjustment 6 ccu sues dote ere 4 7 Integration time adjustment 00 00 0008 4 8 Configuration examples 0 0 0 0c eee eee eee eee 4 9 1 Monitoring unit identification o uau asuaan 4 9 2 Monitoring unit protocol and configuration 4 10 3 Measurement channels runnen 4 11 Control buttons ss cio ee o RR ea ae Rp 4 12 Local display esu 36 sah ei Reh Cra R ees 4 13 Monitoring uni iud ui aee Rb p pe 4 13 Example 1 Default configuration seana 4 13 Example 2 Reconfiguration by user 4 13 Measurement channels o n ueuueun earan r uneer 4 14 Example measurement displays 4 14 EMA User M anual 4 1 CONFIG URATIO N Types of configuration Two types of configuration are required for using the monitoring unit configuration of the unit hardware and software configuration configuration of digital communications if the Profibus DP protocol is used see the manual EMA Digital Communication ref HA 176197 ENG Hardware configuration of monitoring unit The EMA monitoring unit is shipped with the following characteristics configured in accordance with the product code defined when the unit was ordered auxiliary supply voltage 115 V or 230 V current input rating 1 A or 5 A communication protocol Profibus DP or Modbus number of measurement channels see ordering code These characteristics cannot
23. l des Industries lectriques a recognised competent body EMC guide In order to help you reduce the effects of electromagnetic interference associated with the installation of the product Eurotherm Automation can supply you with an Electromagnetic Compatibility guide Ref HA 025464 This guide lists best practices generally applied for EMC EMA User M anual V PRECAUTION S Important precautions and specific information are indicated in the manual by two symbols This symbol means that failure to take note of the information may have serious consequences for the safety of personnel and may even lead to electrocution Danger This symbol means that failure to take note of the information may have serious AN consequences for the facility or may lead to incorrect operation Caution These symbols attract the reader s attention to specific points However the whole of the manual remains applicable Personnel The unit must only be installed configured commissioned and maintained by qualified staff authorised to work on low voltage electrical industrial facilities Independentalar m It is the user s responsibility to fit an independent safety mechanism which must be inspected regularly This is highly recommended given the value of the equipment controlled by the monitoring unit These alarms must be inspected regularly Eurotherm can supply appropriate devices Further information For any further information or
24. lowing increments 1A 10A 100 A between OA and 500A between 510A and 5000 A between 5100 A and 20 000 A Voltage values can be adjusted by increments of 1 V 1 500 V The measurement channel identification shown in the table may be reconfigured to contain any user defined information 4 6 EMA user manual Scale adjustment Scale adjustments can be used to obtain a direct reading of process currents taking account of the transformation ratio of the current transformers used obtain a direct reading of voltages measured indirectly via a resistor divider or voltage transformer To adjust the display of rms currents and voltages for direct reading the Scale Adjustment parameter of the corresponding input must be adjusted using the configuration program Example 1 Current scale adjustment Rating R of current inputs see product code 5 A Current input I3 uses a current trasnformer with a transformation ratio of K 250A 5A 50 The current scale adjustment SA for channel 13 should be set to SA K x R 50 x 5A 250 A Example 2 Voltage scale adjustment The input for channel V2 is used to measure voltage via a resistor divider Kun 8 10 The voltage scale adjustment for channel V2 should be set to 1 1 SA x 100 x 100 125 Kon 8 10 Example3 Exact voltage reading The scale adjustment for input channel V1 is set to SA 108 The signal after transforma
25. nal Terminal Terminal Function block name number labelling Connection to mains supply phase Connection to main supply neutral Protective earth Ground return for digital communication cable shield connection Table 2 2 Auxiliary supply terminals EMA User M anual 2 7 Protective earth connection The protective earth is connected to terminal 64 PE as shown on figure 2 5 The protective earth terminal is labelled with the following symbol Danger JN The protective earth cable should be connected before any other connections are made during wiring and should be the last cable to be disconnected The internal connection between terminals 64 and 65 ensures that the protective earth or ground is returned by terminal 65 PE k mr ban Tini a iki Figure 2 5 Protective earth and auxiliary supply wiring Power supply wiring The unit s power supply should be connected to the AUX terminal block as shown on figure 2 5 The supply is factory set to 115 Vac or 230 Vac depending on the ordering code Caution ik A 1 A fuse should be installed by the user to protect the power supply 28 EMA User Manual Measurement input terminal blocks The measurement channels are independent and isolated The voltage current measurement inputs are indicated by V I and two digits Vxx IExx The first digit indicates the measurement channel number The
26. nel 2 Communication protocol Profibus Bus state Data eXChanGe DXCG Current measured 345 6 A Over high current threshold OVC EMA User M anual 4 15 EURO THERM LIMITED http www eurotherm co uk UK SALES O FFICE Eurotherm Limited Faraday Close Durrington W orthing W est Sussex BN 13 3PL Telephone Sales 01903 695888 Technical 01903 695777 Fax 01903 695666 Sales and support in over 30 countries worldwide For countries not listed overleaf enquiries orders to Eurotherm Limited Export Dept Faraday Close Durrington W orthing W est Sussex BN 13 3PL Telephone 01903 268500 Fax 01903 265982 4416 EMA user manual
27. onnection 0 0 0 eee eee eee 2 8 Power supply wiring 0 0 cece eee ee eee 2 8 Measurement input terminal blocks 2 9 Measurement wiring 0 2 00 eee eee eee eee 2 10 Digital communications wiring 0 ee eee ee eee 2 11 Communication bus wiring and shield grounding 2 11 Digital communications wiring ooo 2 12 Digital communications terminal block 2 12 Communications bus wiring 0000 2 13 Matching and polarisation resistors 2 14 COMMISSIONING cvs bun zo poU EIN BiU R eE a RRR Ift 2 15 Elowchatt 5i da E aa SRI 2 15 Checking the characteristics o o o ooooooooooooo ooo 2 16 Checking the wiring 2 0 0 cee eee eee e 2 16 Powerng Up elcsreibere et t bx eR e eee aes 2 16 EMA User M anual 24 SAFETY DURIN G IN STALLATIO N Mounting Danger AN The EMA monitoring unit must be installed in a fan cooled cabinet to ensure that condensation and pollution are excluded The cabinet must be closed and connected to the protective earth according to IEC 364 or applicable national standards The units are designed for use at an ambient temperature of 45 C or less For installations in a fan cooled cabinet we recommend fitting a fan failure detection device or a thermal safety cut out Units must be mounted with no obstructions above or below which could reduce or hamper cooling If sever
28. riations in the signal to be measured quickly but will be marred by fluctuations 4 8 EMA user manual Configuration examples Some examples of EMA configuration pages are given below They are presented in the form of screen captures from a PC running the configuration program Example 1 Monitoring unit identification Unit identification Furnace 8 Default bus address factory configuration 32 Bus address reconfigured by client 50 new address prepared but not yet confirmed Protocol Profibus DP The corresponding screen is shown in figure 4 2 lt P inntir ainn Selup Current Device Address 32 New Address bo RAEES Device Tag Furnace n 8 hatc 2 chanact HN mcarne PC orliqurntion EMA may 1305 el E Figure 4 2 Screen capture of initial configuration page Profibus protocol EMA User Manual 4 9 Example 2 Monitoring unit protocol and configuration The identification and addresses correspond to the example above Program language English Communication Protocol Modbus Communication speed 19 6 kbaud Parity None N ote To access the configuration shown press the Setup button The corresponding screen is shown in figure 4 3 DTE STET e Bee ej a A B General Channel 1 Channel 2 Channel 3 Channel 4 Channel 5 Selup Comm Fort CONI COM2 L Current Device Address English Espa ol Francais Halang Deutsch DIE
29. se and the facility 22 EMA User M anual DIMENSIONS Overall dimensions of the EMA unit mm 227 x 156 x 72 Front panel mm 72 x 144 Figure 2 1 Dimensions mm EMA User Manual 23 MOUNTING EMA monitoring units are designed to be mounted on a vertical support panel Maximum panel thickness 7 mm minimim thickness 2 mm Leave a gap of at least 5 cm between two units placed side by side Before mounting prepare the panel cut out with dimensions as shown Panel cut out for mounting mm 138 1 0 x 68 0 7 0 2 mounting om Figure 2 2 Mounting The EMA unit is fixed into panel with two screws supplied with the unit The screws are tightened onto the rear of the mounting panel see figure 2 2 Maximum tightening torque 1 5 N m 24 EMA User M anual FRONT PANEL The following features are located on the front panel e a two line by 16 character LCD display a DB9 female connector RS232 standard for configuration using a PC a push button for scrolling through the measurements display pages diagnostic LEDs indicating the state of digital communications diagnostic LEDs indicating transmission and reception of digital signals Product mme 2 tne by 16 character Space fur EUROTH ig B L Display ucl Digital DB 9 connector Tapis pah button pR Eka for exter iaia LED utut LEDs configuration Figure 2 3 Front panel EM
30. second digit indicates the terminal number 1 or 2 e g V31 and V32 correspond to terminals 1 and 2 of the third voltage measurement channel I21 and I22 correspond to terminals 1 and 2 of the second current measurement channel Function Channel Terminal block Terminal Terminal number labelling number labelling Voltage Vil measurement Not used V 12 V21 Not used V 22 V 31 Not used V 32 VAI Not used V 42 N 51 Not used V 52 Current 111 measurement 112 Not used 121 122 131 132 Not used 141 142 I51 152 Not used Not used Not used Table 2 3 Description of measurement terminals EMA User Manual 29 M easurement wiring Current measurements direct or via an external current transformer should be connected to inputs I 11 and I 12 through to I 51 and I 52 see table on previous page Important Eurotherm Automation can supply external current transformers from 10 A 1 A to 500A 1 A Contact your local Eurotherm office for details Voltage measurements should be connected on inputs V 11 and V12 through to V 51 and V 52 Caution AN External fuses are designed to protect the voltage measurement wiring and should be installed as close as possible to the measurement points The diagram below shows an example of current measurement using an external current transformer direct voltage measurement in a
31. sing the configuration program in the workshop or on site with the unit operating or not The EMA s address can be reconfigured as follows for the Profibus DP protocol between addresses 4 and 125 for the Modbus protocol between addresses 1 and 247 The identification and address parameters are set on the first configuration page see example in figure 4 2 below EMA User M anual 4 5 Measurement channel configuration The specific parameters for each measurement channel are set to default values in the factory and can be reconfigured by the user Channel All channels Parameter Integration time Permitted value s 1s 2s 5s 10s 20s 40 s 80 s 160 s 320 s 640 s 1300 s Default value Current channels Current measurement channel identification Any up to 8 characters I1 12 13 I4 I5 Scale adjustment from 1 A to 20000A 500A Current alarm low threshold from 0 A to adjusted scale value Current alarm high threshold from 0 A to adjusted scale value Voltage channels Voltage measurement channel identification Any up to 8 characters U1 U2 U3 U4 US Scale adjustment from 75 to 125 100 Voltage alarm low threshold from 0 V to 550 V OV Voltage alarm high threshold from O V to 550 V Table 4 1 Measurement channel configuration Current values can be adjusted with the fol
32. surement unit 4 significant digits digital link state alarms if the lower or upper thresholds are exceeded Profibus DP and Modbus 9 6 19 2 93 75 187 5 500 or 1500 kbaud for Profibus automatic baud rate detection 9 6 or 19 2 kbaud for Modbus RS485 two wire isolated serial link LCD front panel display LEDs for digital communication state LEDs for transmission state transmit and receive Diagnostic field in frames Profibus 14 EMA User M anual Alarms Type Configuration Configuration Mode Configuration software Parameters configured Isolation Measurement channels Conformity Environment Operating temperature Storage temperature Operating atmosphere Humidity Protection External wiring Physical details Overall dimensions Weight Measured value outside upper or lower thresholds Current from 0 to the maximum of the adjusted scale 1 to 20 000A Voltage from 0 to 550 V Without interrupting communications with the link master For PC Windows 95 98 or NT shipped as standard on 3 7 disks Multilingual program English French German Spanish Italian Female DB9 configuration connector on front panel Identification of unit and bus address For each channel identification and description scale for current inputs 1 to 20 000 A voltage scaling factor 25 integration time alarm high and low thresholds Between measurement channels and low level
33. the measurement circuits 2 16 EMA User M anual Chapter 3 DIGITALCOMMUNICATIONS Contents Page General we conii bI Ch BE bee seh ete xe DIT Gl ae Geb dete es 3 2 Profibus DP protocol aag Re RER RRR RE RRR RR RR eee 3 3 Addressing et eR Rt eee neo SO eb eoe E 3 3 State diagram e ug ud db ber RO RE ERR 3 4 Powering Up cx nk M Rn emt Feed N es 3 4 Parametersettings so csi scra R R e RE R RR a a 3 4 Configuration cest ae REA RH EN ee euros 3 4 Data exchange iusso o deg da e EE 3 6 Modbus protocol 2 0 0 ee IA 3 7 Addressing sees ta ha dacs la eds ag eR 3 7 Diagnostic LEDS iecur REESE a Ses 3 8 EMA User M anual 3 1 G EN ERAL EMA monitoring units are fitted with digital communications as standard This enables four main functions to be performed configuring the communications protocol parameters using Modbus only configuring the monitoring unit s bus address controlling the state of the monitoring unit monitoring all values measured and alarms The digital link uses the RS485 physical data transfer layer standard and the Profibus DP or Modbus protocols The protocol is selected when the unit is ordered but may be reconfigured on site After any changes to the digital communications parameters the unit must be shut down and powered up again to take the parameters into account The communication bus is isolated from all other inputs Message transfers use Master Slave mo
34. tion on input V1 is 219 3 V The correct voltage V1 displayed is SA 108 V V x 219 3 V x 100 100 236 8 V EMA User M anual 4 7 Integration time adjustment The integration time for the measurements determines the stability of the readings and varies depending on the waveforms measured The value of the integration time must take account of the lowest frequencies in the signal measured This in turn depends on the firing mode of the thyristors controlling the electric load The following recommendations can be applied when measuring values controlled by thyristor units Thyristor Typical integration firing mode time values No modulation sinusoidal operation 1sto5s Phase angle firing angle variation 2sto20s Burst firing modulation by complete cycles for typical base time of 15 cycles 160 s to 1300 s Standard single cycle modulation by complete cycles 20 s to 160s with base time of 1 cycle Advanced single cycle modulation by complete cycles with base time of 1 cycle and possibility of not firing 20 s to 160 s for half a cycle Table 4 2 Selection of measurement integration time The integration time values are chosen according to the signal to be measured and the monitoring unit s response time If the integration time is too high readings will be stable but will only track variations in the signal measured slowly If the integration time is too low readings will track va
35. tion of Modbus operation is given in the EMA Communication Manual ref HA176197 ENG Transmission frames use binary characters Character format 1 start bit 8 data bits 1 stop bit No parity or even parity is used In the latter case the bytes are coded using 9 bits Transmission speeds available 9 6 or 19 2 kbaud Addressing To communicate with the EMA monitoring unit and access the measurements the Modbus protocol uses the EMA s physical address the EMA s internal addresses for the actual measurements The physical address address of the monitoring unit on the bus used is set using the supplied configuration program for a PC running Windows 95 98 or NT Important AN As shipped from the factory the default address configured on the EMA is 32 decimal This address may be reconfigured by the user After the EMA s address is changed the new address is only taken into account after the unit is next powered up In normal operation addresses 1 to 247 may be used for the the monitoring unit s physical address The unit s internal addresses for the various values measured are shown in the table below Value V I Measured alarms alarms Address in EMA Table 3 1 Modbus addresses for values measured EMA User M anual 3 7 DIAGNOSTIC LED s The state of Profibus DP communications is indicated by two LEDs on the EMA front panel Raj LED Un
36. ult address configured on the EMA is In normal operation the following addresses may be used 4 to 125 Addresses 0 to 3 are generally reserved for the Master Address 126 is not accepted by the EMA Address 127 is reserved for broadcasting in accordance with the Profibus standard EMA User M anual 33 State diagram The state diagram for data transfers using a read write process comprises four states see figure 3 2 powering up waiting for parameters waiting for configuration transfer of parameter data Powering up After powering up the unit enters a wait phase with two sequences parameter setting configuration Parameter settings This is the wait for parameter message phase WPRM In this phase the configuration may be read Get Cfg A diagnostic request Slave Diag is allowed The parameter setting frame Set Prm contains the following information system parameter settings PNO identification acceptance of synchronisation modes watchdog time etc data parameter settings parameters designated by the master to be accessible for cyclic reading Also as described in the Addressing section above during the WPRM phase the EMA s address may be changed using the Set Slave Address function Any other type of message will be rejected during the wait for parameters phase Important AN EMA parameter settings are fixed and unique for all devices Configuration This is th
37. ximum length of the transmission line is 1 2 km for speeds lt 93 75 kbaud EMA User Manual Digital communications wiring Coro o ida olla B R TR T K aud Figure 2 8 Communications bus wiring and ground shielding Digital communications terminal block The digital communications terminals are isolated from the other signals Communications terminal block terminals Labelling for Number Labelling Function Profibus Modbus active state Signal receive and transmit RX Tx Rx Tx U V for digital signals Not used Signal receive and transmit Rx Tx RX Tx 5 V for digital signals Not used Table 2 4 Function of terminals on digital communications terminal block Important By convention the potential of terminals A is greater than the potential of AN terminals B when the RS485 line is active Terminals 71 and 75 are connected together inside the unit Terminals 72 and 74 are connected together inside the unit 2 12 EMA User Manual Communications bus wiring The digital communication bus uses two active wires RS485 The 0 V GND connection is optional Figure 2 9 Example of digital communication wiring EMA User M anual Matching and polarisation resistors In order to protect against possible line reflections a matching resistor termination resistor must be fitted to each end of the bus The value of the resistor dep
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