Operating Instructions Edition 12/2003

Operating Instructions Edition 12/2003 Transmitter for pressure, differential pressure and flow, filling level, absolute pressure from differential pressure 7MF4*34-... I SIEMENS EFTA01216716 EFTA01216717 SIEMENS SITRANS P, DS III PA series 7MF4*34-... Edition 12/2003 Operating Instructions Transmitters for Pressure, Differential Pressure and Flow, Filling Level Absolute pressure from differential pressure series and absolute pressure from pressure series, DS III series with PROFIBUS-PA Edition of operating manual Firmware identification License plate System integration Installation path PDM 02 FW: 300.01.03 FW: 300.01.04 FW: 300.01.05 FW: 300.01.06 PDM V.5.02 + SP1: Dev. R.1/2 SITRANS P DSIII 03 FW: 300.01.07 PDM V.5.02 + SP1; Dev. R.1/2 SITRANS P DSIII 04 FW: 300.01.07 PDM V.5.02 + SP1; Dev. R.1/2 SITRANS P DSIII Table 1 History of this instruction manual SITRANS P. DS III PA series A5E00053276-04 1 EFTA01216718 SITRANS P. DS III PA series 2 ASE00053276-04 EFTA01216719 Table of contents Classification of Safety—Related Notices 7 General Notes 8 Technical description 11 1.1 Application range 11 1.2 Product features 11 1.3 Measuring type 12 1.3.1 Pressure 12 1.3.2 Differential pressure and flow 12 1.3.3 Filling level 12 1.3.4 Absolute pressure 13 1.4 Design and functional principle 13 1.4.1 Design 13 1.4.2 Mode of operation 16 1.4.2.1 Mode of operation of the electronics 16 1.4.2.2 Pressure 18 1.4.2.3 Differential pressure and flow 18 1.4.2.4 Filling level 19 1.4.2.5 Absolute pressure from the differential pressure series 19 1.4.2.6 Absolute pressure from the pressure series 20 2 Communication structure for PROFIBUS PA 21 2.1 Block model for recording and processing measured values 21 2.1.1 Pressure measuring block 22 2.1.2 Electronics temperature measuring block 22 2.1.3 Analog input function block 22 2.1.4 Counter function block 22 2.1.5 Local operation and display 22 2.1.6 Connection between the blocks using parameters 23 2.1.7 Parameters for measured value display 23 2.2 Description of individual blocks 24 2.2.1 Pressure measuring block (Transducer Block 1) 24 SITRANS P. Series DS III PA ASE00053276-04 3 EFTA01216720 2.2.1.1 Type of linearization function group 25 2.2.1.2 Units for the pressure measuring block 28 2.2.2 Electronics temperature measuring block 28 2.2.3 Analog input function block 29 2.2.4 Counter function block 30 3 System integration 33 3.1 Cyclic data transmission 33 3.1.1 Setting the PROFIBUS address 33 3.1.2 Configuration 33 3.1.2.1 Configuring the user data 34 3.1.2.2 Transmission of user data via PROFIBUS 35 3.1.2.3 Status 36 3.1.2.4 Diagnosis 39 3.2 Acyclic Data Transmission 41 3.3 SIMATIC PDM 41 4 Local operation and display 43 4.1 General operating instructions 43 4.1.1 Digital display 43 4.1.2 Measured value display 44 4.1.3 Unit display 44 4.1.4 Error signaling 44 4.1.5 Mode display 45 4.2 Operation with the keyboard 45 4.2.1 Measured value display 47 4.2.2 Error display 47 4.2.3 Mode 4: Electric damping 48 4.2.4 Mode 7: Zero point adjustment (position error correction) 48 4.2.5 Mode 10: Key lock 49 4.2.6 Mode 13: Source of measured value display 49 4.2.7 Mode 14: Physical unit 51 4.2.8 Mode 15: PROFIBUS address 54 4.2.9 Mode 16: Device operating mode 54 4.2.10 Mode 17: Position of the decimal point 55 4.2.11 Mode 18: Zero point adjustment display 55 4.2.12 Mode 19: LO adjustment 56 4.2.13 Mode 20: HI adjustment 57 5 Functions/Operation via PROFIBUS-PA 59 5.1 Measuring operation 59 5.2 Settings 59 5.2.1 Pressure measurement 60 5.2.2 Filling level (level, volume and mass) measurement 60 5.2.2.1 Level measurement 60 5.2.2.2 Volume measurement 61 5.2.2.3 Mass measurement 62 5.2.3 Flow measurement 63 5.2.3.1 Application point for the root function, creep quantity suppression 64 4 SITRANS P. Series DS III PA A5E00053276-04 EFTA01216721 5.2.3.2 Flow measurement correction 65 5.2.4 Adjustment to the desired process variable 65 5.2.5 Electric damping 67 5.2.6 Warning and alarm limits 67 5.2.7 Fault Behavior 69 5.2.7.1 Output 69 5.2.7.2 Counter output 69 5.2.8 Simulation 70 5.2.8.1 Output simulation 70 5.2.8.2 Input simulation 70 5.2.8.3 Pressure sensor simulation 71 5.2.8.4 Simulation of the sensor and electronics temperature 72 5.2.9 Calibration interval and service interval 72 5.2.9.1 Warning 73 5.2.9.2 Alarm 73 5.2.10 Slave pointers 73 5.2.11 Operating hours counter 74 5.2.12 Sensor adjustment 75 5.2.13 Positional error adjustment 76 5.2.14 Resetting 76 5.2.14.1 Resetting to delivery status 76 5.2.14.2 Restart (warm start) 76 5.2.14.3 Resetting the PROFIBUS address to 126 77 5.2.15 Operator input inhibits 77 6 Modular design 79 7 Installation 81 7.1 Installation (except filling level) 82 7.1.1 Mounting without mounting bracket 83 7.1.2 Mounting with mounting bracket 83 7.2 Mounting "filling lever 85 7.2.1 Installation 85 7.2.2 Connecting the low pressure line 85 7.3 Rotating the measuring cell in relation to the housing 87 7.4 Electrical Connection 89 7.4.1 Connection to screw terminals 90 7.4.2 Connection with plug M12 91 7.5 Turn digital display 93 8 Commissioning 95 8.1 Pressure, absolute pressure from the differential pressure series and absolute pressure from the pressure series 96 8.1.1 Measuring gases 97 8.1.2 Measuring vapor and liquid 98 8.2 Differential pressure and flow 99 8.2.1 Measuring gases 99 8.2.2 Measuring liquids 100 8.2.3 Measuring vapor 102 SITRANS P. Series DS III PA ASE00053276-04 5 EFTA01216722 9 Technical data 103 9.1 Nominal measuring ranges and overload limits 108 9.1.1 Pressure 108 9.1.2 Differential pressure and flow 108 9.1.3 Absolute pressure from the pressure series 109 9.1.4 Absolute pressure from the differential pressure series 109 9.1.5 Filling level 110 9.2 Dimensions 110 10 Care and maintenance 115 11 PROFIBUS 117 11.1 Transmission method 117 11.2 Topology 117 11.3 Properties of the PROFIBUS PA 119 11.3.1 Profile 119 11.3.2 Interfacing 120 12 Ordering Data 123 12.1 Ordering data for basic device 124 12.2 Ordering data for spare parts 131 12.3 Ordering data for accessories 135 13 Certificates 137 14 Index 139 15 139 16 Appendix 141 16.1 Literature and catalogs 141 16.2 Summary of error messages and status codes 142 16.3 Certificates 146 6 SITRANS P. Series DS III PA A5E00053276-04 EFTA01216723 Classification of safety—related notices This manual contains notices which you should observe to ensure your own personal safety, as well as to protect the product and connected equipment. These notices are highlighted in the manual by a warning triangle and are marked as follows according to the level of danger: rTe DANGER indicates an immenently hazardous situation which, if not avoided, will result in death or serious inury. WARNING iindicates a potentially hazardous situation which, if not avoided, could result in death or serious injury. CAUTION used with the safety alert symbol indicates a potentially hazardous situation which, if not avoided, may result in minor or moderate injury. CAUTION used without the safety alert symbol indicates a potentially hazardous situation which, if not avoided, may result in property damage. NOTICE indicates a potential situation which, if not avoided, may result in an undesirable result or state. NOTE ihighlights important information on the product, using the product, or part of the documentation that is of particular importance and that will be of benefit to the user. Copyright Siemens AG 2001 All rights reserved The reproduction. transmission or use of this document or its contents is not permitted without express written authority. Offenders will be liable for damages. All rights, including rights created by patent grant or registration of a utility model or design, are reserved. Siemens AG Bereich Automatisiwungs- and Antriebstechnik Geschaftsgebiet Process Instrumentation 0-76161 Karlsruhe SITFtANS P. Series OS III PA A5E00053276-03 Disclaimer of Liability We have checked the contents of this manual for agreement with the hardware and software described. Since deviations cannot be precluded entirely. we cannot guarantee full agreement. However. the data in this manual are reviewed regularly and any necessary corrections included in subsequent editions. Suggestions for improvement are welcomed. Siemens AG 2001 Technical data subject to change. 7 EFTA01216724 General notes This device has left the factory in a perfect condition as regards safety. The notes and warnings in these Operating Instructions must be observed by the user if this state is to be maintained and hazard-free operation of the device assured. NOTE Dear customer, You have purchased a modular device in which you can exchange the electronics. In the event of an exchange, please observe the instructions enclosed with the component to be exchanged. For reasons of clarity the manual does not contain detailed information about all types of products and cannot take into account every conceivable case of installation, operation or maintenance. If you require further information or should problems occur which are not sufficiently explained in the manual, you can consult your local Siemens branch to obtain the necessary information. May we also draw your attention to the fact that the contents of the manual are not part of a previous or existing agreement, approval or legal relationship or an amendment thereof. All obligations of the Siemens AG result from the contract of purchase which also contains the full and solely valid warranty agreement. These contractual warranty conditions are neither extended nor restricted by the contents of the manual. The contents reflect the technical state at the time of going to print. Subject to technical modifications in the course of further development. WARNING Explosion-proof devices may only be opened when the power is off. Intrinsically safe devices lose their license as soon as they are operated on circuits which do not meet the test requirements valid in your country. The device may be operated with high pressure and corrosive and dangerous media. Therefore serious injuries and/or considerable material damage cannot be ruled out in the event of improper handling of the device. The perfect and safe operation of this equipment is conditional upon proper trans- port, proper storage, installation and assembly as well as on careful operation and commissioning. The equipment may only be used for the purposes specified in the instruction manual. Excluded Liability The user is responsible for all changes made on the device, provided that these are not explicitly mentioned in the instruction manual. SITRANS P. Series DS III PA 8 A5E00053276-03 EFTA01216725 Qualified Personnel are persons familiar with the installation, assembly, commisioning and operation of the product and who have the appropriate qualifications for their activities such as: • training or instruction or authorization to operate and maintain devices/systems according to the standard of safety technology for elecrical circuits, high pressures and corrosive as well as hazardous media. • for devices with explosion protection: training or instruction or authorization to be allowed to work on electrical circuits for potentially explosive systems. • training or instruction according to the standards of safety engineering in the care and use of suitable safety equipment. CAUTION Modules which are sensitive to electrostatic charge may be destroyed by voltages which are far below the human level of perception. These voltages occur already when you touch a component or electrical connections of a module without first discharging yourself electrostatically. The damage incurred by a module as a result of an overvoltage is not usually immediately perceptible but only becomes noticeable after a long time in operation. Therefore, a suitable equipotential bonding must be guaranteed when repairing the device. Trademarks SIMATIC®, SIPART®, SIREC®, SITRANS® are registered trademarks of Siemens AG. Third parties using for their own purposes any other names in this document which refer to trademarks might infringe upon the rights of the trademark owners. SITRANS P. Series OS III PA A5E00053276-03 9 EFTA01216726 SITRANS P. Series DS III PA 10 A5E00053276-03 EFTA01216727 Technical description IIrThe transmitter must warm up for about 5 minutes after switching on the power in order to obtain stable measured values. I NOTE 1.1 Application range The SITRANS P, Series DS III PA transmitter measures the pressure of non- corrosive and corrosive as well as critical gases, vapors and liquids. You can use it in the following applications • Pressure • Differential pressure • Level • Volume • Volume flow • Mass flow rate The transmitters are available with different designs of pressure-transmitting seals for special applications, e.g. measuring highly viscous substances. The device can be operated as a stand-alone unit or using its PROFIBUS interface. 1.2 Product features • Transmitter with bus connection according to IEC 61158-2 and EN 50170 • Transmitter designs with intrinsic safety against explosion can be installed in SITRANS P. Series OS III PA A5E00053276-04 11 EFTA01216728 Technical description areas where there is an explosion hazard. • The certificate of conformity meets the European rules (CENELEC). • Data transmission and auxiliary power (9 to 32 V) via bus connection together • Bus connection independent of polarity and fixed bus current limiting in the event of an error • Contact separation (test voltage 500 V AC) • Intrinsically -safe and flameproof version for use in explosion protected area (Ex- area) • Can communicate through PROFIBUS-PA (profile version 3.0, Class B); • The transmitter can be parameterized locally using three buttons or externally via SIMATIC PDM. 1.3 Measuring type 1.3.1 Pressure This version of the device measures the pressure of non-corrosive and corrosive as well as critical gases, vapors and liquids. Can be operated with measuring cells from 1 to 400 bar. 1.3.2 Differential pressure and flow This version of the device is used to measure • the differential pressure, e.g. the active pressure, • of a small positive or negative excess pressure, • of the flow q 1670 (together with a flow control valve) non-corrosive and corrosive and ciritical gases, vapors and liquids. Can be operated with measuring cells from 20 mbar to 30 bar 1.3.3 Filling level This version of the device with mounting flange measures the filling level of non- corrosive and corrosive as well as critical liquids in open and closed containers. Can be operated with measuring cells from 250 mbar to 5 bar The nominal width of the mounting flange is DN 80 or DN 100 or 3 or 4 inch. In the filling level measurement on an open container the low pressure connection of the measuring cell remains open (measurement "compared to atmospheric"), in the measurement on a closed container this connection is usually connected to the vessel to compensate the static pressure. SITRANS P. Series DS III PA 12 ASE00053276-04 EFTA01216729 Technical description The wetted parts are made of different materials (see chapter 9, pg. 103) according to the required corrosion resistance. 1.3.4 Absolute pressure This version of the device measures the absolute pressure of non-corrosive and corrosive as well as critical gases, vapors and liquids. There are two series: one "differential pressure" series and one "pressure" series. The "differential pressure series' is characterized by a high overload capacity. Can be operated with measuring cells from 250 mbar to 30 bar 1.4 Design and functional principle 1.4.1 Design The device consists of different components depending on what the customer has specified in the order. The possible variants are listed in chapter 12, pg. 123. The rating plate (Figure 1, pg. 13 and Figure 4, pg. 15) with the order number is on the side of the housing. You can determine the optional constructional details and the possible measuring range (physical properties of the built-in sensor element) with the specified number and specifications in chapter 12, pg. 123. 1 Order number 2 Serial number • SIEMENS 0.76101 Karlsruhe • SITRANS P PED:SEP ( 0032 Transmitter for pressure 7MF0034-1EB10-1DA1 Fab. Nr. N1 LN11-004711 Us:DC 9-321/ (no, inlr.savel PROF IBUS-PA Mat.:Connoc. Dianne. Filling 1.4404 2 4819 Silikon61 Measuring span Overrange limits : -63 bar : -1 - 100 bar oleetiOniPe$ Figure 1 Example for a rating plate SITRANS P. Series OS III PA A5E00053276-04 13 EFTA01216730 Technical description Opposite it is the license plate (Figure 2, pg. 14 and Figure 4, pg. 15). This contains information about the hardware and firmware versions among other thing. • SIEMENS 0.76131 Kadsruha • SITRANS P '1102 G GEN d NC 7.1/70 U.:DC S 32V I PRODOUS.PA) FIBSOKIEX 1160 Observe EC rod ExaminMIonConiIoaoI •..85,60°G FVt. 0300.01.01 ION: 02.01 01 • FW: )OOOCYY.ZZ FM: XX.YY.ZZ I I I I I L — — Compatibility identifier I I I I L - - - Terminal board product status L - - — Serial number I I I _ — FW edition — Function range identifier Profile revision (0300 = 3.00) Figure 2 Example of approval plate The electronics housing is made of diecast aluminum or stainless steel precision casting. There is an unscrewable, round cover on the front and rear. The front cover (4, Figure 3, pg. 15) can be designed as a window in order to be able to read measured values directly from the digital display. The inlet (2, Figure 3, pg. 15) to the electrical connection box is located on the side, either left or right. The opening which is not used is sealed by a blanking plug (e.g. 5, Figure 4, pg. 15). The PE conductor terminal (2, Figure 4, pg. 15) is mounted at the front of the housing. The electrical connection box is accessible for power supply and screen when the rear cover (1, Figure 4, pg. 15) is removed. The bottom part of the housing contains the measuring cell with process connection (8, Figure 3, pg. 15). This is secured turning by a locking screw (7, Figure 3, pg. 15). The modular concept of the SITRANS P, Series DS III PA allows the measuring cell and electronics to be exchanged as required. At the top of the housing you can see a plastic cover (3, Figure 3, pg. 15) which can be opened. The input keyboard is beneath this. 14 SITRANS P. Series DS III PA A5E00053276-04 EFTA01216731 Technical description Figure 4 Rear view of device SITRANS P. Series DS III PA. pressure series Figure 3 Front view of device SITRANS P, Series DS III PA, pressure series Rating plate Inlet with cable gland Plastic access cover to the input keys Screwable cover, optional with window Digital display Measuring point plate Locking screw Process connection Unscrewable cover for access to electrical connection box PE conductor connection Alternative measuring point plate License plate Blanking plug SITRANS P. Series DS III PA A5E00053276-04 15 EFTA01216732 Technical description 1.4.2 Mode of operation This chapter describes how the transmitter operates and what protection and safety measures you need to observe. First of all the electronics are described on a Funktionsplanebene (functional level), then the sensors used for the individual measuring modes in the various versions of the device. The process variable to be measured is referred to generally in the following sections as the input variable. 1.4.2.1 Mode of operation of the electronics The input variable provided by the sensor (1, Figure 5) is amplified by an instrument amplifier (2) and converted into a digital signal via an analog-digital converter (3). This is evaluated in a microprocessor (4), its linearity and temperature behavior cor- rected and made available using the isolated interface (5) on the PROFIBUS-PA (7). The measuring cell-specific data of the electronics and the data for transmitter parameterization are stored in two non-volatile memories (6). You can parameterize the transmitter directly at the measuring point with the three input keys (8) and view measuring results, error messages and modes of operation on the digital display (9), which is securely screwed onto the device. You can get the measuring results with status values and diagnosis using the PROFIBUS-PA's cyclical data transmission (see chapter 3.1, pg. 33). Using the acyclical data transmission (see chapter 3.2, pg. 41), you carry out the parameterization and can view all results and error messages. To do this, you require a tool, for example the SIMATIC PDM. SITRANS P. Series DS III PA 16 ASE00053276-04 EFTA01216733 Technical description OOO IIIIIIIIIII 111,11,11,11,11 0 0 - Liu 7 Power supply 10 1 Sensor of the measuring cell 2 Instrument ampii er 3 Analog-digital converter* 4 Microcontroller 5 Isolation 6 two non-volatile memories in the measuring cell and in the electronics 7 Proflbus-PA interface 8 three input keys (local operation) 9 Digital display 10 Auxiliary power source 11 DP/PA coupler or link 12 Bus master Figure 5 Transmitter SITRANS P, Series DS III PA, electronics SITRANS P. Series DS III PA A5E00053276-04 17 EFTA01216734 Technical description Figure 6 Pressure measuring cell, functional diagram 1.4.2.2 Pressure The pressure pe is fed in through the process connection (3, Figure 6, pg. 18) of the measuring cell (2). It is passed further through the seal diaphragm (4) and the filling liquid (5) to the silicon pressure sensor (6) and its measuring diaphragm flexes as a result Four piezo-resistors in bridge circuit doped in the measuring diaphragm change their resistance as a result. The change in resistance causes a bridge output voltage proportional to the input pressure. The transmitters with measuring spans 5 63 bar measure the input pressure compared with atmospheric, those with measuring spans z 160 bar compared with a vaccum. CAUTION If the measuring signal fails due to a sensor break, the isolating diaphragms may also be destroyed. In this case,process medium may leak from the threaded collar of the device in pressure transmitters with relative pressure cell (5 63 bar). Reference pressure Measuring cell Process connection Seal diaphragm Filling liquid Silicon pressure sensor Input variable pressure 1.4.2.3 Differential pressure and flow The differential pressure is transmitted via the seal diaphragms (7, Figure 7, pg. 19) and the filling liquid to the silicon pressure sensor (5). On exceeding the measuring limits, the overload diaphragm (6) flexes until one of the seal diaphragms (7) comes into contact with the body of the measuring cell (4) and protects the silicon pressure sensor (5) against overloading. The seal diaphragm is deflected by the resulting differential pressure. Four piezo-resistors in bridge circuit doped in the measuring diaphragm change their resistance as a result. The change in resistance causes a bridge output voltage proportional to the differential pressure. 18 SITRANS P. Series DS III PA A5E00053276-04 EFTA01216735 Technical description Input pressure P, Process flange O-ring Body of the measuring cell Silicon pressure sensor Overload diaphragm Seal diaphragm Filling liquid Input pressure P_ Figure 7 Measuring cell for differential pressure and flow, functional diagram 1.4.2.4 Filling level The input pressure (hydrostatic pressure) acts through the seal diaphragm (10, Figure 8, pg. 19) at the mounting flange hydraulically on the measuring cell. The differential pressure applied at the measuring cell is transmitted via the seal diaphragms (6) and the filling liquid (7) to the silicon pressure sensor (3). On exceeding the measuring limits, the overload diaphragm (5) is deflected until one of the seal diaphragms (6) comes into contact with the body of the measuring cell (4) and protects the silicon pressure sensor (3) against overloading. The measuring diaphragm is flexed by the differential pressure. Four piezo-resistors in bridge circuit doped in the measuring diaphragm change their resistance as a result. The change in resistance causes a bridge output voltage proportional to the differential pressure. Process flange 2 O-ring 3 Silicon pressure sensor 4 Body of the measuring cell 5 Overload diaphragm 6 Seal diaphragm at the measuring cell 7 Filling liquid of the measuring cell 8 Capillary tube with filling liquid of the mounting flange 9 Flange with tube 10 Seal diaphragm at the mounting flange Figure 8 Measuring cell for filling level, functional diagram 1.4.2.5 Absolute pressure from the differential pressure series The absolute pressure is transmitted via the seal diaphragm (6, Figure 9, pg. 20) and the filling liquid (7) to the silicon pressure sensor (3). On exceeding the measuring limits, the overload diaphragm (5) is deflected until the seal diaphragm (6) comes into contact with the body of the measuring cell (4) and protects the silicon pressure sensor (3) against overloading. The pressure difference between the input pressure (pe) and the reference pressure (8) on the low pressure side of the measuring cell flexes the measuring diaphragm. Four piezo-resistors in bridge circuit doped in the measuring diaphragm change their resistance as a result. The change in resistance causes a bridge output voltage proportional to the absolute pressure. SITRANS P. Series DS Ill PA ASE00053276-04 19 EFTA01216736 Technical description Process flange Seal diaphragm at the measuring cell O-ring Body of the measuring cell Silicon pressure sensor Overload diaphragm Filling liquid of the measuring cell Reference pressure Input variable pressure Figure 9 Measuring cell for absolute pressure, functional diagram 1.4.2.6 Absolute pressure from the pressure series The pressure is transmitted via the seal diaphragm (3, Figure 10, pg. 20) and the filling liquid (4) to the absolute pressure sensor (5) and flexes its measuring diaphragm. Four piezo-resistors in bridge circuit doped in the measuring diaphragm change their resistance as a result. The change in resistance causes a bridge output voltage proportional to the input pressure. Measuring cell Pressure connection Seal diaphragm Oil filling Absolute pressure sensor Input variable pressure 20 Figure 10 Measuring cell for absolute pressure from pressure series, functional diagram SITRANS P, Swiss DS III PA ASE00053276-04 EFTA01216737 Sensor Communication structure for PROFIBUS PA 2 This chapter describes the mode of operation of the device-specific function blocks with the aid of a graphic block model, which is broken up sequentially into its individual levels. Knowledge of the physical block is assumed: Therefore it is not described in this chapter. 2.1 Block model for recording and processing measured values The functions of the device are divided into blocks for different areas or responsibility (Figure 11). They can be parameterized by acyclic data transfer (see chapter 3.2, pg. 41). T Pressure measuring block, absolute pres- sure, differential pres- sure, also filling level, flow and Measuring block for electronics temperature _IIAnalog input function block Counter function block: Local operation .- - and display PROFIBUS• Figure 11 Block connection diagram for recording and processing measured values SITFtANS P. Series OS III PA A5E00053276-04 21 EFTA01216738 Communication structure for PROFIBUS PA 2.1.1 Pressure measuring block The pressure measuring block (Figure 11) carries out adjustments to the sensor. Its initial value is the linearized and temperature -compensated measuring result. For measurement of the filling level and flow, the required conversions take place here. An example is the conversion of an input pressure into level or volume for hydrostatic filling level measurement. The pressure sensor temperature measurement is also processed here and the pressure and temperature limits are constantly monitored. 2.1.2 Electronics temperature measuring block The electronics temperature measuring block (Figure 11) carries out the required temperature measurement functions and monitors the permitted temperature limits. 2.1.3 Analog input function block In the analog input function block (Figure 11), the selected measured value is processed further and is adjusted to the automation task. Example: For a flow measurement, the volume flow needs to be converted into the number of containers filled. The output of this block supplies the measured value and the associated status information to the PROFIBUS. 2.1.4 Counter function block For flow measurement, the volume or mass which has flowed through can be totalled in the counter function block (Figure 11). Its function, therefore, is very similar to that of a water clock. The output of this block supplies the total values and the associated status information to the PROFIBUS. 2.1.5 Local operation and display With local operation (Figure 11), the desired measured value can be set and displayed with its physical unit. SITRANS P. Series DS III PA 22 ASE00053276-04 EFTA01216739 Communication structure for PROFIBUS PA 2.1.6 Connection between the blocks using parameters The output values of the pressure and electronics temperature measuring blocks can be fed into the analog input and counter function blocks as input values for further processing. For this, the parameter "Channel" must be set accordingly in the relevant function block. Measuring block Output value (Parameter) Usable in analog input function block Usable in counter function block Pressure Temperature X Secondary variable 1 X Secondary variable 2 X Primary variable X X Secondary variable 3 X X Electronics temperature Electronics temperature X Table 2 Connection between the blocks 2.1.7 Parameters for measured value display The values of the following parameters from the measuring and function blocks can be presented on the digital display For this, the parameter -Source for the display" must be set accordingly (see chap er 4.2.6, pg. 49). Block Parameter Can be presented on the digital display Pressure measuring block Temperature X Secondary variable 1 X Secondary variable 2 Primary variable X Secondary variable 3 X Non-linearized pressure value X Electronics temperature measuring block Electronics temperature X Analog input function block Output X Counter function block: Counter output X Table 3 SITRANS P. Series DS 111 PA A5E00053276-04 Display on the digital display 23 EFTA01216740 Communication structure for PROFIBUS PA 2.2 Description of individual blocks 2.2.1 Pressure measuring block (Transducer Block 1) Figure 12 shows the signal flow of measured values from the measuring cell through the pressure measuring block (which also processes filling level, flow and sensor temperature) into the respective output values (temperature, measured value (primary variable) etc.). The parameters of the individual functions (measuring range, output range etc.) can be changed via acyclic access. Parameters vla acydical access I l measiming cell a c S 8.E.E i !'d E Ileeics g Of C > e ea CC roal g 2 co , CO 0202MCe 1. e.a t 5 . t2,- . CIS P 13,2 S 2 a , • i a. 13`35 3. Ng. 21 i § 0 s a , E.e il 1 r, a e g a a a e li e .11 2 x b i; 3 . ..i C q1 I E s l 3 I 2 a 81 21 c. P Calbra- fit= Normal-0 1 Linea- swing It ton (Posnon error cotton- Lion) rdniril ;sal izaton nzabon tyPe d PicalionAlul0- e z Secondary variable 2 c co 2, Secondary vanabte 3 Figure 12 Functioning mode Pressure measuring block function groups The non-linearized pressure value first of all passes through an adjustment. The resulting corrected pressure value is checked for its sensor limits. If the limits are 24 SITRANS P. Series DS III PA ASEOOO53276-O4 EFTA01216741 Communication structure for PROFIBUS PA exceeded, this results in a "Bad" status and the error message "Error in recording measured value". The corrected pressure value is stored in Secondary variables 1. Next, it undergoes normalization, whereby the input signal is mapped onto the range 0 to 1 (percent/100). The normalized pressure value is stored in Secondary variables 2. After this — depending on the measuring task — it goes through one of four types of linearization (see following chapter). The scaling maps the normalized and linearized measured value (pressure, level, volume or volume flow) onto the actual process value using the specification of the operating range. This is stored in measured values (Primary variables). By multiplying by the density, for a volume flow, the mass flow can be calculated It is stored in Secondary variables 3. The pressure sensor temperature value is available in the "Temperature" parameter. 2.2.1.1 Type of linearization function group The normalised pressure is passed through linearization algorithms, which are presented in Table 4, to adjust it to the relevant process requirements. The algorithm is changed using the "Characteristic curve type" parameter. Figure 13 Linearization type function group SITRANS P, Series DS III PA ASE00053276-04 25 EFTA01216742 Communication structure for PROFIBUS PA Measuring task Linearization symbol Characteris- tic curve type Description Pressure measurement - Linear No linearization Filling level: Level - Linear No linearization Filling level: Volume User- defined (table) Linearization of container characteristic curves. The relationship between filling level and volume is described by a maximum of 31 points with any intervals. Flow: Mass-/ Volume flow without correction Extracted Root extraction of the input value for measurement according to the screening method. Additional parameters for the root function Root function application point and creep quantity suppression, see Table 5 r Flow: Mass-/ volume flow with correction Extracted and table Root extraction of the input value for measurement according to the screening method with linearization. For the screening method, the high- est level of accuracy is achieved when the operating point is at the design point. If there are deviations, the measured deviation also increases, therefore the measuring accuracy is corrected using a charac- teristic curve with a maximum 31 points. ---- / —/—/ Table 4 Linearization functions available Table 5 describes the manufacturer -specific parameters, which are used in the flow measuring type to supplement the root function. See also PROFIBUS profile parameters in the Appendix. To enter a characteristic curve, select the characteristic curve type "User-defined (table)". Enter the "New number of interpolation points", which you subsequently want to enter. The interpolation points must always be entered in pairs. For each point x[n) in the operating range, a point yin] is required. The device checks between which two interpolation points the pressure (secondary variable 1) related to the measuring range lies and uses the characteristic curve sec- 26 SITRANS P, Series DS III PA ASE00053276-04 EFTA01216743 Communication structure for PROFIBUS PA tion (straight line) to map the pressure to the measured value (primary variable) in the operating range. Operating range (y) e.g. Volume measured value (primary variable) 451,151 Pressure Measuring (secondary variable 1) range (x) Figure 14 Entry of user-defined characteristic curve using interpolation points x(i). y(i) Parameter Description Application point of the root function This parameter determines the flow point in %, below which the differential pressure is set in a linear relationship to the flow. Creep quantity suppression This parameter determines the flow point in %, below which the flow becomes 0. Table 5 SITFtANS P. Series OS III PA A5E00053276-04 Manufacturer -specific parameters for flow measurement 27 EFTA01216744 Communication structure for PROFIBUS PA 2.2.1.2 Units for the pressure measuring block In the pressure measuring block, there are four different points where you have the possibility of selecting units. Depending on the measuring type, units from the following measuring functions are permitted: Variable Pressure Filling level Measuring type Volume Volume Flow Mass flow Non-linearized pressure value P P P P P Secondary variable 1 P P P P P Measured value (Primary variable) P L V F F Secondary variable 3 — --- --- --- M Table 6 Overview of the available units P: Pressure L: Filling level V: Volume F: Volume flow M: Mass flow For all measuring types, you can set the unit "%" as a measured value (primary variable). For all measuring types, secondary variable 2 has a standardized value of 1. The unit is fixed as "none". For each of the measuring functions P, L, V, F and M, the physical units are listed in chapter 4.2.7, pg. 51. 2.2.2 Electronics temperature measuring block This measuring block is manufacturer -specific and is not described in the profile. It is responsible for monitoring the internal temperature of the device electronics and cannot change the pressure value, only its status. The permitted limits correspond to those of the permitted ambient temperature. If a limit is exceeded, the status changes to 'GOOD — Active Critical Alarm — High/Low- limit". The status of the corrected pressure value in the pressure measuring block (see chapter 2.2.1, pg. 24) receives the status "UNCERTAIN — Value not accurate — high/low-limit". This action is accompanied by a PROFIBUS diagnostic message "Electronics temperature too high". Furthermore, indicators for maximum and minimum values are available (see chapter 5.2.10, pg. 73) SITRANS P. Series DS III PA 28 ME00053276-04 EFTA01216745 Communication structure for PROFIBUS PA 2.2.3 Analog input function block The analog input function block is one of the standard functions of transmitters. Figure 15 shows the processing of measured values up to the output. Parameters via acyclical access Measured value from pressure measuring Nock 0 a 63 et:aSimulation enable 1 a Filter time constant Fault logic a si MAN if AUTO Simulation Scaling Mapping Damp- Limit value Replace- switch to 0-1 onto output ing testing mont value range behavior , ' O/S = Out of Service toto E et) rs Mode and status pro- cessing Output (value status) Figure 15 Analog input function block function groups Functioning mode The measured value from the pressure measuring block—or a simulation value given by the simulation switch — undergoes a further normalization (measured value scaling) and mapping onto the output range using output scaling (application -specific measured variable). The signal is then filtered (damping) and checked to see that it is within given limits. For this, upper and lower warning and alarm limits are available. If the measured value has the status "bad", the fault logic can output a preset safety value: This can be set as the last usable measured value or a given substitute value. Using the target mode selected in mode and status processing you can choose between output of the automatically -recorded measured value (AUTO setting) or a SITRANS P, Series DS Ill PA A5E00053276-04 29 EFTA01216746 Communication structure for PROF/BUS PA manually-set simulation value (MAN setting). If the function block is not working (O/S), the preset safety value will also be output. The analog input function block deals with the numerical value separately from the physical unit. This means that you can set around 1000 pre-defined units. The most important are listed in chapter 4.2.7, pg. 51. 2.2.4 Counter function block The counter function block is one of the standard functions of transmitters. It is used for flow measurement. Figure 16 shows the processing of measured values up to the output values. Parameters via acyclical access Measured value from Fault Behavior last — "good' value Fault logic the pressure measuring block E E 1• 3 130LANCECP. POS ONLY: Ea .13 Mon 1 olio 0 NEG ONLY: Ea bMNon1NY0 HOLD: O. ----Time differential 1 E E E =C 23LL L (0 tv Nino kilt Ili a aJ O - Fault behavior behavior with bad Summation Integration/ status direction resetting Summation takes place weighted according to the length of the time period OrS = Out of Service L mit value test F.Es 1 O. O O I MAN 0/S. AUTO E 2,to Mode and status processing Counter output __„ 0„ (Vabe Sitars) Figure 16 Counter function block function groups 30 SITRANS P. Series DS Ill PA ASE00053276-04 EFTA01216747 Communication structure for PROFIBUS PA Functioning mode The function block processes the measured values from the pressure measuring block. If a value's status is -bad", the fault behaviour setting decides whether this value or the last "good" value is passed on for totalling. The measured values now pass through fixing of the summation direction, to which you allocate either forwards, backwards or net counting. Next, they are integrated with the time, so that the flow in a given time interval can be determined, and checked to see that they within the limits. Here, it is also possible to reset the total to a pre-loaded value. You can configure the counter function block in such a way that you can reset or pre- set it not only using the acyclic services but also from the user programme via the cyclic data traffic. For more details see chapter 3.1.2.1, pg. 34. Using the target mode selected in mode and status processing you can choose between output of the automatically -recorded measured value (AUTO setting) or a manually-set simulation value (MAN setting). The possible units correspond to the volume and mass variables for the pressure measuring block (see chapter 2.2.1.2, pg. 28). SITFtANS P. Series DS III PA ASE00053276-04 31 EFTA01216748 Communication structure for PROFIBUS PA SITFtANS P. Serbs DS III PA 32 A5E00053276-04 EFTA01216749 System integration 3.1 Cyclic data transmission 3 Using cyclic data transmission, the user data relevant for process automation is transferred between the class 1 Master (control or automation system) and the transmitter. 3.1.1 Setting the PROFIBUS address Upon delivery, the PROFIBUS address is set to 126. You can set it on the device (chapter 4.2.8, pg. 54) or via the bus, with a parameterization tool such as SIMATIC PDM or HWKonfig. The new address only becomes effective after a warm start or if the device has been disconnected from the bus for a short time. 3.1.2 Configuration Information on the input and output range, as well as the consistency of the cyclically transmitted data is defined in the DeviceMasterData file (DMD file) , tested with the device's configuration message and, if appropriate, declared to be valid. During the design, the user data which will be transmitted in cyclic operation is set. This means that it is possible to optimise the quantity of data to be transmitted. The DMD files for all common devices are already stored in the Siemens control system, however they are also accessible over the Internet (http://www.ad.siemens.deicsi_e/gsd) and can be subsequently imported. SITRANS P. Series DS III PA ASE00053276-04 33 EFTA01216750 System integration 3.1.2.1 Configuring the user data The user data which is made available to the control system or the open-loop control via the PROFIBUS depends on the desired configuration selected (see chapter 5.2.3, pg. 63). In principle, it is supplied by the function blocks (see chapter 2.1.3, pg. 22 ff.) and put together in the following order: The analog input function block supplies the content of the "Output" parameter, the counter function block supplies the content of the "Counter output" parameter. The configuration allows you to select the function block from which output data will be transmitted: 1. Output and/or 2. Counter output For the "Counter output" parameter, you can add the following additional functions: 3. Reset counter output 4. Operating mode Using "Reset counter output", you can reset the integrator from the operator programme and change its functioning mode using "Operating mode". NOTE For STEP 7. the configuring tool is HW-Konfig. For STEP 5, it is Function block/ Parameter byte User data sent to the Master User data, sent by the Master Meaning depending on further parameters Analog input/output 1.-4. Measured value --- Pressure, level Volume, mass flow 5. Status Volume flow. Sensor temperature Electronics temperature Counter/ counter output 6.-9- Measured value --- Mass or volume 5. Status Table 7 34 User data. depending on the function block selected SITRANS P. Series DS III PA ASE00053276-04 EFTA01216751 System integration Additional function byte User data sent to the Master -User data sent by the Master Meaning Reset counter output 1. -•• Reset counter output Counter reset function 0: Normal operation of the counter Integration is running 1: Stop integration and reset integrator to 0 2: Stop integration and preset integrator with the pre-loaded value Operating mode 2. — Operating mode Counter operating mode 0: Net counter, count upwards and downwards 1: Forward counter. 2: Backward counter 3: Stop count Table 8 User data depending on the additional functions selected for the counter output function block 3.1.2.2 Transmission of user data via PROFIBUS The user data is continuously updated by the cyclic service of PR0FIBUS. Bits 7 6 5 4 3 2 1 0 byte 1 VZ 2725E 25 24232221 2 E 262-12_2 M 2-22-42-62_6 22 3 2-82-62_10 M 2_il 2_12 2_i3 2_14 2_15 4 2_16 2_17 2_18 M 2_19 2-2o 2_21 2_22 2_23 Table 9 Floating point illustration for the measured value according to IEEE standards VZ: preceding sign; 0 = positive, 1 = negative M: Mantissa E: Exponent SITRANS P, Series DS III PA A5E00053276-04 35 EFTA01216752 System integration 3.1.2.3 Status Status provides information about: 1. the usability of the measured value in the user programme 2. the device status (self-diagnosis/system diagnosis) 3. additional process information (process alarms) The coding of the status byte is listed on the following pages. In addition, possible causes of an error are given, along with measures to remove it. Hex Digital display PDM display Cause Measure 80 G_128 — Normal operation -- 84 G_132 update.event A parameter relevant for the behavior of the device has been changed . The display is extinguished after 10 s. Note to the control system 89 G_137 Fallen below warning limit Fallen below lower parameterized waming limit. Correct error using user programme. 8A G_138 Warning limit exceeded Upper parameterized waming limit exceeded. Correct error using user programme. 8D G_141 Fallen below alarm limit Fallen below lower parameterized alarm limit. Correct error using user programme. 8E G_142 Alarm limit exceeded Upper parameterized alarm limit exceeded. Correct error using user programme. A4 G_164 Maintenance required Maintenance interval has expired: Calibration or service Maintenance work, calibration of the electronics or servicing of the measuring cell is required. Table 10 36 Status coding for "Good quality" SITFtANS P. Serbs DS III PA A5E00053276-04 EFTA01216753 System integration Hex Digital display PDM display Cause Measure 00 8_000 -- Is used if no other information is available. -- 04 B_004 Configuration error Adjustment range too small Repeat the adjustment process with pressure values which are further apart from one another. 08 B_011 Bad, not connect led, value con- slant Variable Is not calculated Correct the "Measuring transducer type" setting 0C B_012 Bad, device error Device has an irrepara- ble error Replace the electronics. OF B_015 Device error. value constant Device has an irreparable error. Change the electronics. 10 B_016 Sensor error Sensor shows error. Have the measuring cell checked by service personnel. 11 B_017 Sensor error, Fallen below limit value Negative pressure too high Fallen below lower overload limit Increase the pressure in a positive direction. (<-20% of nominal measuring range). 12 B_018 Sensor error, Limit value exceeded Positive pressure too high Upper overload limit exceeded (>120% of nominal measuring range). Reduce the pressure. 1F B_031 Out of order, value constant The function block is put out of order with a target mode command. A parametrized safety value is supplied. For normal operation, reset the target mode to "AUTO-. Table 11 SITRANS P, Series DS III PA ME00053276-04 Status coding for "Quality bad" 37 EFTA01216754 System integration Hex Digital display PDM display Cause Measure 47 U_071 Last usable value, value constant Input condition "Fail Safe" is met. the parameterized safety setting is set to 'keep last valid value". Check the recording of measured values. 48 U_072 Substitute value Use of the totalizer block, if the measured value status = "Bad* and the parameterized safety setting is set to "keep last valid value". The total value changes. Fault behavior = Safe operation Chock the recording of measured data. 48 U_075 Substitute value constant Value is not an automatic measured value. This Identifies a parameterized, static substitute value or a preset value. Chock the recording of measured values. 4F U_079 Initial