smartMODULPREMIUM User Manual
Contents
1. m W E E Supporting your great ideas www pewatron com a theniber of ihe Angst Pfister Group 103 52 390 005 EH 0909 pdf 4 2 1 smart MODULPEEMIUM register assignments The sequence of registers in the current version is listed below as they appear in the Host SW Section 4 2 3 has examples of reading registers 0xC0 Modbus_address Addresses DeviceType Serial Nr SoftwareVersion MOD Konzentration T_module 0 1x C Alarm_Level Warn_Level Current Modbus status of smart MODULPREMIUM Standard address see Page Error Bookmark not defined The addresses can be written and read After an address has been changed subsequent communication with the smart MODULPREMIUM js only possible via this address The type of device connected Read only Serial number of device connected Read only Software version of device connected Read only Assumed value for internal concentration calculation Read only Concentration is stored in this register as a numerical value Depending on the smart MODULPREMIUM type a factor is still required for the calculation found in the QS certificate supplied with every smart MODULPREMIUM Internal sensor temperature as reference point for temperature correction Read only Provides the threshold trigger value for the main gas alarm referenced to the modulation value displayed for the concentration of real gas This modulation value is reduced by one entered in2. 2 Connections on the smart MODUL REMIUM smart MODULPREMIUM is supplied with an operational power supply of 12 to 30V DC Trouble free functionality is guaranteed within this range Despite internal stabilization voltage supply fluctuation should be limited In some cases such as in plants where heavy loads are switched the appropriate precautions need to be taken The various connections in power supply and output signals are combined in socket ST1 Figure 1 Power supply connections Connections on ST1 are designated as follows V power supply connections 12V 30V DC I connection for power output selectable as 0 20mA or 4 20mA ground earth for V I and RS485 positive signal level for integrated RS485 interface RS negative signal level for integrated RS485 interface Anleitung_SM Premium_V2 4 15 9 2009 M N Issued without guarantee all rights reserved m El Supporting your great ideas www pewatron com a member of the Angst Pfister Group 103 52 390 005 EH 0909 pdf The measuring cell and interface circuitry are connected by a 30cm data cable smart MODULPREMIUM can be supplied with cabling up to a metre length on request The connection is made with a four pole push connector Figure 2 4 pole connector Anleitung _SM Premium_V2 4 15 9 2009 M N Issued without guarantee all rights reserved m El E Supporting your great ideas www pewatron com a member of ihe Angst Pfister Group 103
3. m W E E Supporting your great ideas www pewatron com a member of the Angst Pfister Group 103 52 390 005 EH 0909 pdf Checksum The checksum calculates according to a LRC method Longitudinal Redundancy Check from all the bytes sent without CR and LF characters The bytes are added and the sum subtracted from OxFF 1 is added to the result making the LRC complete In the example shown here the value is A6 The checksum is always transmitted with the data and recalculated by the recipient Should a value in the data set become corrupt then the checksum calculated by the recipient would be different from that sent The data set in this case would be unusable A reply to the string above would look as follows A00302000109 Start Address Crtl Com No of bytes Data Checksum LRC transferred 0 100 2 characters AO 03 02 00 01 09 1 character 2 characters 2 characters 2 characters 2 characters The following is an example of a checksum calculation Command Read register 5 only gt Modulation MOD Datal0 Datal1 A Datal2 0 Datal3 0 Datal4 3 Datal5l 0 Datal6 0 Data l7 0 Datal8 5 Datal9 0 Datal10 0 Data 11 0 Data 12 17 Length 12 Note LRC and CRLF do not belong to the data CRLF is not included in the LRC calculation 1 Lrc 0 lI checksum is set to 0 For i 1 i lt Length it 2 Lre Lre datalil II All transfe
4. manufacturer s guarantee do not attempt to exchange or replace the smart MODUL supplied with another smart MODUL Anleitung _SM Premium_V2 4 15 9 2009 M N Issued without guarantee all rights reserved m E E Supporting your great ideas www pewatron com a member of ihe Angst Pfister Group 103 52 390 005 EH 0909 pdf Technical data Product features Measurement principle Measurement range Cuvette dimensions H Gas line connectors Technical features Response time Accuracy Stability Reproducibility Linearity error NDIR dual beam dependent on model see list of measurable gases Length model dependent x 28 X 42 mm Lx Wx PCB 72 x 55 x 21 mm Lx Bx H 3mm internal 5mm external lt 10 s at 0 1l min 2 upper range value 2 upper range value over 12 month period lt 2 upper range value lt 1 upper range value Error recognition wire break Modul Connect output current 2mA 4 20mA Calibration Operating temperature Pressure Humidity Warm up time Perfusion rate Communication Analogue output signal Digital output signal Electrical data Power supply Current demand Max load kk increased depending on model type entering location in register 0x52 the application range in terms of pressure can be frozen output current 0 20mA zero and voltage by jumper 10 C 40 C 950 1050hPa 0 95 rel humidity lt 90s start up time 15 minutes
5. 02 9E Start Adr 160 read Start register no checksum register Reply AO 03 04 22 Star Adr 16 read no bytes 7 checksum t 0 The data is transferred as characters and can be converted using an ASCII table Anleitung _SM Premium_V2 4 15 9 2009 M N Issued without guarantee all rights reserved m W E E Supporting your great ideas www pewatron com a member of the Angst Pfister Group 103 52 390 005 EH 0909 pdf e Read off Concentration register Send the following string AO 03 00 0A 00 01 Start Adr 160 read Start register no register Reply AO 03 02 01C8 EE Star Adr 16 read no bytes 456 checksum t 0 The two data bytes are summed and transferred as a hexadecimal value If this value is converted to a decimal number the concentration can be determined here 456ppm Anleitung_SM Premium_V2 4 15 9 2009 M N Issued without guarantee all rights reserved m W E E Supporting your great ideas www pewatron com PEWATRON a member of the Angst Pfister Group 103 52 390 005 EH 0909 pdf 5 Start up phase After power supply and current output have been connected to smart MODULPREMIUM the sensor starts a warm up phase This lasts approximately 90 seconds and serves as an internal check of all components and routines The following states can occur during the warm up phase depending on t
6. concentration to the sensor It is not necessarily 0 gas measuring atmospheric CO results in a concentration of 350 ppm 380 ppm Therefore the selection of zero gas is extremely important 2 End point calibration The end point calibration serves to set the upper measurement value UMV This is the maximum value that can be reliably detected and measured by the sensor When selecting sensors it is important not to set the UMV too small as this may result in inaccuracy and erroneous measurement IMPORTANT smartMODULPREMIUM must be run for at least 15 minutes before calibration Anleitung _SM Premium_V2 4 15 9 2009 M N Issued without guarantee all rights reserved m W E E Supporting your great ideas www pewatron com a member of the Angst Pfister Group 103 52 390 005 EH 0909 pdf 8 1 Zero point calibration Perfuse the sensor with zero gas making sure the measuring cuvette has been fully purged and only zero is present Place a jumper on positions 1 2 in 1JP4 and wait approx 20 seconds The value of the output current should be either OmA or 4mA depending on operating system or drop to OV or 0 5V e g with 100Q Removing the jumper ends calibration and the new value is saved in the sensor WARNING Only run calibration with zero gas otherwise subsequent measurements may be faulty IPL IPZ IPS Figure 6 Zero calibration Jumper on JP4 PIN 1 2 Anleitung_SM Premium_V2 4 15 9 2009 M N Issued withou
7. indicating measurement values as current output Firstly it is possible to use a range of 0 20mA combined with a resistance to produce a linear voltage signal The second option is measurement output with 4 20mA In this version it is easier to detect a wire break loose connection or sensor failure The settings for the output signal are described in the following a 0 20mA gt Jumper JP3 is in place as supplied Figure 3 Working range 0 20mA b 4 20mA gt Jumper JP3 not in place nn Hue r ee Figure 4 Working range 4 20mA Select the range of output current for signal transfer you need for your application Switching between the two ranges is possible once the device is unplugged from the power supply Anleitung _SM Premium_V2 4 15 9 2009 M N Issued without guarantee all rights reserved m El Supporting your great ideas www pewatron com a member of the Angst Pfister Group 103 52 390 005 EH 0909 pdf 4 2 RS485 Interface The smart MODUL PREMIUM has a RS485 interface half duplex Via this interface the device can communicate via three lines e RS interface s inverted data line e RS interface s non inverted data line e GND interface reference potential This must be used for communication via the interface when the participant does not have the same zero potential e g galvanic separation The interface can be accessed via this 5 pole plug connector I Figure 5 RS485 interf
8. 103 52 390 005 EH 0909 pdf smart MODULPREMIUM User Manual Anleitung _SM Premium_V2 4 15 9 2009 M N Issued without guarantee all rights reserved m El Supporting your great ideas www pewatron com a member of the Angst Pfister Group 103 52 390 005 EH 0909 pdf Content General Connections on the smart MODULPREMIUM Connections with smart MODULPREMIUM smart MODULPREMIDM output signals 4 1 Analogue signal with 0 20mA 4 20mA or 0 1V 0 2V resistance 4 2 RS485 interface 4 2 1 smart MODULPREMIDM register assignments 4 2 2 Communication via the Modbus Open Protocol 4 2 3 Example of register read offs Start up phase Wire break between smart MODUL and interface electronics Using smart MODULPREMIUM with voltage output Calibrating the smart MODULPREMIUM 8 1 Zero point calibration 8 2 End point calibration 9 Measuring cell with gas line 10 General information Technical data Anleitung_SM Premium_V2 4 15 9 2009 M N Issued without guarantee all rights reserved m W E E Supporting your great ideas www pewatron com a member of the Angst Pfister Group 103 52 390 005 EH 0909 pdf 1 General smart MODULPREMIUM combines the advantages of smart MODULFZOW with the circuit board of smart MODULCONNEET This combination offers not only a variety of interfaces for data exchange but also the option of controlled perfusion of the sensors via a gas inlet and outlet Based on the physical meas
9. 52 390 005 EH 0909 pdf 3 Connections with smart MODULPREMIUM smart MODULPREMIUM starts automatically after the start up phase Section 4 Connections and signal output for the smart MODULPREMIUM are via the ST1 plug For operation and use of the current output the sensor must first be installed and connected To avoid faults and possible damage to the device we recommend adherence to the following sequence of operations 1 Install smart MODULPREMIOM jn the desired application ensuring sufficient distance from conducting components to avoid short circuits and possible damage Remove the green plug from the ST1 socket The connections and clamping screws are now easy to reach Connect the power supply to V and GND Connect the signal cable for current output I and GND GND is the common ground for the power supply and current signal Make sure that the sequence of the connections on the plug corresponds to that on the circuit board make sure the plug is inserted correctly 4 re connect the ST1 plug The smart MODULFPREMIUM starts automatically with the start up phase see Section 4 Anleitung _SM Premium_V2 4 15 9 2009 M N Issued without guarantee all rights reserved m W E E Supporting your great ideas www pewatron com a member of the Angst Pfister Group 103 52 390 005 EH 0909 pdf 4 smart MODULPREMIM output signal 4 1 Analogue signal with 0 20mA 4 20mA or 0 1V 0 2V resistance There are two options for
10. Send the following string A0 03 00 80 00 04 A0 Start Adr 160 read Startregister Register no checksum Reply AO 03 08 53 4D 2D 43 4F 64 Star Adr 16 read no bytes S M Cc 0 checksum t 0 Data is transferred as characters and can be converted using an ASCII table Read off Serial No register Send the following string AO 03 00 86 00 04 9A Start Adr 160 read Start Register no checksum register Reply AO 03 08 08 00 019A 99 Star Adr 16 read no bytes 08 00 410 checksum t o The first two bytes are transferred as characters and can be converted using an ASCII table The third and fourth bytes are transferred as hexadecimal values and each yields a two decimal place number The fifth and sixth bytes are summed as a hexadecimal value and produce a three decimal place number Read off Status flags register Send the following string A0 03 00 09 00 01 A2 Start Adr 160 read Start register no checksum register Reply AO 03 02 00C0 F7 Star Adr 16 read no bytes 11000000 checksum t 0 The two data bytes are summed and transferred as hexadecimal value If this value is converted to binary number then the flags raised can be determined Read off Software Version register Send the following string A0 03 00 84 00
11. ace connections The RS and RS lines should be bridged by at least 30 cm cable with 120 Q resistance inline RS RS GND e 120R RS485 settings Baud rate 2400 Data bits 7 Stop bits 1 Parity Even Timeout 1000ms Retries 3 TIP In some cases it is necessary to increase the Timeout time to 1 5s Anleitung_SM Premium_V2 4 15 9 2009 M N Issued without guarantee all rights reserved m El Supporting your great ideas www pewatron com a member of the Angst Pfister Group 103 52 390 005 EH 0909 pdf Signal trace The signal traces at RS485 interfaces can vary greatly The following are two examples of signals in the data line of the RS485 Example 1 RS232 RS485 converter 4 7V RS 70 73ms 70ms Bl Example 2 USB RS485 converter 4 7V RS High flexibility of amplitude is available because with RS485 the potential difference of both data lines is evaluated In the above examples it can be seen that the difference between RS and RS is OV inactive or 2V active A short pause of max 100ms can occur The module then replies This depends on how many bytes need to be read off if only one byte is read then the module reply lasts approx 70ms Reading off more bytes correspondingly increases the reply phase The amplitude of the data line depends on the RS485 interface used Anleitung_SM Premium_V2 4 15 9 2009 M N Issued without guarantee all rights reserved
12. ee Figure 8 Tubing with an internal diameter of 3mm and external diameter of 5mm is needed to connect up to the measurement cell Ensure that tubing is securely attached to the inlet and outlet connectors OUTLET INLET Figure 8 Measurement cell with gas inlet and outlet Adhere to the directional designation of INLET and OUTLET switching the direction of gas flow through the cell could lead to erroneous results NOTE Ensure the correct type of tubing is used In some applications corrosive gases occur and could cause problems with the tubing material Do not perfuse the smartMODULFREMIUM at a gas flow rate of greater than 1 per minute Anleitung_SM Premium_V2 4 15 9 2009 M N Issued without guarantee all rights reserved m El Supporting your great ideas www pewatron com a member of the Angst Pfister Group 103 52 390 005 EH 0909 pdf 10 General information Connections not discussed in this document include JP1 Must be lett free JP2 Production relevant ST2 USB production relevant ST4 Keep free These connectors are production relevant and may not under any circumstances be used for normal operation Misuse or attempts to use these connectors will damage the electronics and void the manufacturer s guarantee Figure 9 Additional connectors smart MODULPREMIUM may only be used with the smart MODUL supplied To ensure and maintain the trouble functionality and compliance with the conditions of the
13. er Countries Sensors Physical Sensors Peter Felder Phone 41 0 44 877 35 05 peter felder pewatron com Geometrical Sensors Eric Letsch Phone 41 0 44 877 35 14 eric letsch pewatron com Power Supplies DC DC Converters Switching Power Supplies DC AC Inverters Sebastiano Leggio Phone 41 0 44 877 35 06 sebastiano leggio pewatron com E Components Current Converters Motors Claudio Chiffi Phone 41 0 44 877 35 03 claudio chiffi pewatron com Man Machine Interface Measurement Probes Sebastiano Leggio Phone 41 0 44 877 35 06 sebastiano leggio pewatron com Drives DC Drives AC Asynchronous Motors Stepper Motors Servomotors Electrical Linear Drives DC Controllers Servo Controllers Frequency Converters Switched mode Power Supplies Couplings Claudio Chiffi Phone 41 0 44 877 35 03 claudio chiffi pewatron com A E E Supporting your great ideas www pewatron com
14. full specification 0 5 1 l min 0 20mA linear 4 20 mA linear 0 1 V linear with 50 Q 0 2 V linear with 100 Q Modbus ASCII via RS485 12 30Volt DC max 140mA 1250 Anleitung_SM Premium_V2 4 15 9 2009 M N Issued without guarantee all rights reserved m W E E Supporting your great ideas www pewatron com PEWATRON a member of the Angst Pfister Group PEV AIRON a member of the Angst Pfister Group We are here for you Addresses and Contacts Sales Switzerland Matthias R egg Ruhbergstrasse 32 CH 9230 Flawil Tel 41 0 44 877 35 18 Mobil 41 0 76 491 66 66 Fax 41 0 44 877 35 19 matthias rueegg pewatron com Sales Germany Baden W rttemberg Region Postcode 60000 79999 Dieter Hirthe M hlweg 23 D 71554 Weissach i T Phone 49 0 71 91 49 60 58 Mobile 49 0 163 76 27 430 Fax 49 0 71 91 93 31 88 dieter hirthe pewatron com Rest of Germany Kurt Stritzelberger Neumarkter Str 86a D 81673 Munich Phone 49 0 89 260 38 47 Mobile 49 0 17 18 03 41 35 Fax 49 0 89 43 10 91 91 kurt stritzelberger pewatron com Sales Austria Kurt Stritzelberger Neumarkter Str 86a D 81673 Munich Phone 49 0 89 260 38 47 Mobile 49 0 17 18 03 41 35 Fax 49 0 89 43 10 91 91 kurt stritzelberger pewatron com PEWATRON AG Thurgauerstrasse 66 CH 8052 Zurich Phone 41 0 44 877 35 00 Fax 41 0 44 877 35 25 info pewatron com www pewatron com Sales Oth
15. he operating system chosen 4 20mA First approx 2mA then a jump to approx 4mA After approx 90 seconds I gt 4mA depending gas concentration present 0 20mA First OmA After approx 90 seconds I gt OmA depending on gas concentration present When the warm up phase has finished and all test routines completed trouble free smart MODULPREMIUM automatically switches to normal operation and displays gas concentration measured as linear current 6 Wire break between smart MODULPREMIUM and interface electronics If the connection between a smart MODULPREMIUM and the interface electronics is interrupted accidental separation or wire break the following state is displayed at the current output Operating with 4 20mA gt Output current is frozen at 2mA Operating with 0 20mA gt Frozen at the last delivered current value Depending on operating current and switching values this state can be used as error recognition If the fault is rectified smart MODULPREMIUM automatically re enters the normal warm up phase and then switches over to normal operation when complete as described in Section 5 NOTE If operation with 0 20mA has been chosen the frozen current value is maintained until end of the warm up phase Trouble free wire break recognition is general only possible operating with 4 20mA Anleitung_SM Premium_V2 4 15 9 2009 M N Issued without guarantee all rights reserved m W E E Supporting your great ideas www pe
16. ights reserved m W E E Supporting your great ideas www pewatron com a member of the Angst Pfister Group 103 52 390 005 EH 0909 pdf 4 2 2 Communication with the smart MODULPFEMIUM via Modbus Open Protocol Reading off TTL signals provides access to a small fraction of the information logged by the smart MODULPREMIUM Since smart MODULPREMIDUM has a large amount of data potentially available it makes sense to use a BUS protocol The Modbus Protocol basically works on the master slave principle The master PC or u controller sends a request to the slave smart MODULFREMIOM which in turn answers The duration of this phase until all data is received depends on how many registers need to be read As a rule the smart MODULPREMIUM reacts to the request within 100ms The character string is sent directly without reply pause The slave does not send any data without a request The request is always first interpreted after dispatch by CRLF WARNING Some programmes automatically send the CRLF with most conventional programmes this needs to be tagged onto the string manually The smart MODULPREMIUM sends no reply if it receives an incomplete request This is also the case when one or more registers are absent from a register set section request An adapted form of the Modbus Protocol is used for smart MODULFREMIUM differing from the standard version in that one path is used for send and receive This ASCII protocol uses a serial half dup
17. lex connection Datagram structure The following section describes how a request data string to smart MODULFPREMIUM is constructed The example below shows the current modulation read off from a smart MODULPREMIUM with address 160 Example string looks as follows A00300050001A6 Start Address Ctrl Com Data checksum LRC 1 character 2 characters 2 characters 0 100 2 characters 2 characters AO 03 00 05 00 01 A6 Note Addresses control commands and data are prefixed with 0x and the actual address commands as nn The Ox merely indicates that the data is hexadecimal but since the Modbus Protocol ASCII is defined as hexadecimal this information is superfluous and only the address or command is transferred The string contains no Ox and 0x05 becomes 05 Anleitung_SM Premium_V2 4 15 9 2009 M N Issued without guarantee all rights reserved m W E E Supporting your great ideas www pewatron com a member of the Angst Pfister Group 103 52 390 005 EH 0909 pdf Start As a rule datagrams start with a colon irrespective of whether they are requests or replies Address This defines to which device address the string is assigned As standard the device address is the last two digits of the MODULPREMIUM serial number as delivered Ex Serial number 22 0800 486 gt device address 86 Serial number 52 0800 228 gt device address 28 These are added t
18. o search for module addresses Now any register e g concentration can be requested from all module addresses 1 255 with a timeout of one second A module with the correct address responds by sending a reply This reply includes the module address so that at the end of the search cycle it is possible to see by processing the reply which module addresses are currently connected to the bus system Control commands The control commands indicate what needs to be done with the addresses detected Basically the MODULPREMIOM distinguishes between Read gt 0x03 and Write gt 0x06 The command in the example shown here is Read Register 0x03 gt 03 Data The register number is sent in data as a parameter In the example here it is Start Address High 0x00 gt 00 Low 0x05 gt 05 and Number Register High 0x00 00 Low 0x01 gt 01 The Start Address High and Start Address Low indicate to which register address the control command is directed in this case address 00050x05 MOD Number Register High and Number Register Low state how many registers beginning with the start address should be read Should 10 Registers be read then 0010 needs to be entered Registers 05 to 14 are read and transferred Data is transferred in its hexadecimal form The number of bytes doubles after conversion to from ASCII to Hex Anleitung_SM Premium_V2 4 15 9 2009 M N Issued without guarantee all rights reserved
19. rred bytes are binary added with overflow 8 Bit Example 200 200 400 With 8 only 2562 144 is written Lre In this example the rest sum is 90 3 Lre 0xFF Lre I From 255 subtract sum value 90 4 Lre Lre 1 1 255 90 1 166 A6 in Hex checksum request Anleitung _SM Premium_V2 4 15 9 2009 M N Issued without guarantee all rights reserved m W E E Supporting your great ideas www pewatron com a member of the Angst Pfister Group 103 52 390 005 EH 0909 pdf Example String A00300050001 Converted to ASCI values A 65 0 48 1 49 3 51 5 53 Calculation A 0 0 3 0 0 0 5 0 0 0 1 65 48 48 51 48 48 48 53 48 48 48 49 602 602 256 346 346 256 90 Rest Checksum 255 90 1 166 A6 in hex After calculation of the checksum the following would be sent A00300050001A6 The reply would yield for example the following A00302002008 checksum 08 from reply data packet The structure is as follows Start of the frame AO gt Address sender 03 gt Register data 02 gt No bytes HEX 0020 gt Register data 08 gt checksum reply Anleitung_SM Premium_V2 4 15 9 2009 M N Issued without guarantee all rights reserved m W E E Supporting your great ideas www pewatron com PEWATRON a member of the Angst Pfister Group 103 52 390 005 EH 0909 pdf 4 2 3 Examples of registers read offs All the following refer to a smart MODULCONECT with address 160 e Read off Device Type register
20. t guarantee all rights reserved m El Supporting your great ideas www pewatron com a member of the Angst Pfister Group 103 52 390 005 EH 0909 pdf 8 2 End point calibration 1 Flood smart MODULPREMIUM with the gas concentration corresponding to the upper measurement value and make sure no residual gas is present in the cuvette Place a jumper on positions 2 3 on JP4 and wait approx 20 seconds Output should increase to 20mA or 2 0V Removing the jumper ends calibration and the new value is saved in the sensor WARNING Only run calibration with the appropriate gas concentration for the measurement range given otherwise subsequent measurements may be faulty a a ft fl iz N IPL IPZ IPA Figure 7 Voltage calibration Jumper auf JP4 PIN 2 3 Anleitung _SM Premium_V2 4 15 9 2009 M N Issued without guarantee all rights reserved m E E Supporting your great ideas www pewatron com PEWATRON a member of the Angst Pfister Group 103 52 390 005 EH 0909 pdf 9 Measuring cell with gas line The smart MODULPREMIDM housing is made of aluminium to protect the sensor from mechanical damage and is with fitted with gas lines to ensure the measuring cell is flooded with the appropriate gas The smart MODULPREMIUM housing is made of aluminium to protect the sensor from mechanical damage and is with fitted with a gas line connectors inlet and outlet to allow perfusion of the smart MODULFPREMIUM s
21. this register and can be freely set by the user Provides the threshold trigger value for the gas pre alarm referenced to the modulation value displayed for the concentration of real gas This modulation value is reduced by one entered in this register and can be freely set by the user Anleitung_SM Premium_V2 4 15 9 2009 M N Issued without guarantee all rights reserved m W E E Supporting your great ideas www pewatron com PEWATRON a member of the Angst Pfister Group 103 52 390 005 EH 0909 pdf 0x09 Status flags Status flags indicate the states the module can adopt Read only Individual flags read from right to left mean Flag 0 Test flag value 1 with device test Flag 1 Warm up value 1 approx 10s after start Flag 2 Syserr value 1 device fault Flag 3 Alarm value 1 with main gas alarm Flag 4 Warn value 1 with gas pre alarm Flag 5 Start up value 1 in the start up phase approx 90s Flag 6 Korr value 1 when smart MODULPREMIDM is temperature compensated Flag 7 mw_ok value 1 when das smart MODULPREMIUM has been calibrated Flags 6 Korr and 7 mw_ok are internal flags set for each process smart MODULPREMIUM during production They also have a quality control role and are set to 1 when the smart MODULPREMIUM js temperature compensated and has been calibrated Anleitung _SM Premium_V2 4 15 9 2009 M N Issued without guarantee all r
22. urement of infrared absorption the device is not only highly selective but also provides high levels of accuracy and reliability when measuring gas concentration Its compact construction and low maintenance needs make it ideal for use even under very difficult conditions The smart MODULPREMIDM is ideal for creating a sensor system for measuring explosive or poisonous gases supplying signals that can be read off either via MODBUS ASCI as linear analogue current or output voltage The rugged housing guarantees that the test gas remains within the measuring cell and provides the system with mechanical protection All smart MODULPREMIUM devices can be used with the following outputs 4 20mA 3 wire 0 20mA 3 wire 0 1 0V combined with a 50 Ohm resistance 0 2 0 V combined with a 100 Ohm RS 485 communication via MODBUS ASCII The range of different signal outputs makes integration of the device into existing systems remarkably simple reducing integration and development costs Given the wide range of gasses and their concentrations for which the smart MODUL has already been developed smart MODULPREMIUM from smartGAS Mikrosensorik GmbH offers the optimal basis for universal implementation as top quality IR sensory technology Anleitung_SM Premium_V2 4 15 9 2009 M N Issued without guarantee all rights reserved m W E E Supporting your great ideas www pewatron com a member of the Angst Pfister Group 103 52 390 005 EH 0909 pdf
23. watron com a member of the Angst Pfister Group 103 52 390 005 EH 0909 pdf 7 Using smart MODULPEEMIOM with voltage output In some applications it is necessary to convert the smart MODULPREMIDM output signal into a linear voltage signal so that it can be evaluated This is easily achieved by inserting a precision resistance into the voltage output between I and GND The result drop off in voltage across the resistance reflects the concentration of the gas measured Depending on operating current the following voltages can be set 4 20mA gt 0 2V 1 0V with a 500 resistor gt 0 5V 2 0V with a 1000 resistor 0 20mA gt OV 1 0V with a 50Q resistor gt OV 2 0V with a 1000 resistor NOTE The maximum resistance possible for producing output signals is 125Q Anything larger would give rise to measurement error or even In some cases damage to smartMODULFREMIUM The maximum permitted output voltage is 2 5V and should not be exceeded Anleitung_SM Premium_V2 4 15 9 2009 M N Issued without guarantee all rights reserved m W E E Supporting your great ideas www pewatron com a member of the Angst Pfister Group 103 52 390 005 EH 0909 pdf 8 Calibrating smart MODULPREMIUM Many applications require sensor calibration after the first operational run up or at regular intervals thereafter There are basically two types of calibration to consider 1 Zero point calibration This serves to indicate the normal zero gas
Download Pdf Manuals
Related Search