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Burster 9221 IP 230, Руководство пользователя

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Page 23 of 82 

Date: 27.01.06 

6.9.1.3 

Calibration of strain gage sensors 

Calibration is necessary in order to specify the relationship between the electrical 
signals measured by the connected sensors and the measured values to be 
displayed. A two-point calibration procedure is used here. Normally the sensors 
have a test and calibration certificate containing details of the electrical signals. 
The typical certificate might look like the example shown below, where the most 
important values are labeled. 

 

2 

1 

3 

4 

5 

6 

Содержание 9221 IP 230

Страница 1: ...ng information may be amended without notice No part document may be reproduced or processed using electronic systems without prior consent in writing burster provides no warranty of any kind with res...

Страница 2: ...y remarks 2 Description of operation 3 Technical data 4 Operating instructions for the IP20 version 5 Operating instructions for the IP65 version 6 Configuring for use and testing 7 Profibus configura...

Страница 3: ...it 16 6 3 Before switching on 17 6 4 Terminal assignments 17 6 5 Supply voltage 17 6 6 Grounding and surge protection 18 6 7 After switching on 18 6 8 Configuring addresses and calibration 18 6 8 1 Ad...

Страница 4: ...Excel spreadsheet 46 6 14 Electromagnetic compatibility 46 6 15 Behavior in the event of a fault 46 7 PROFIBUS CONFIGURATION 47 7 1 RS485 interface 47 7 2 Bus structure 47 7 3 Number of bus stations 4...

Страница 5: ...ut drive level 78 10 2 3 Increasing the resolution by averaging and filtering 79 10 2 4 Optimum device configuration 79 10 3 Factory settings 80 10 4 Maintenance Customer service and Warranty 80 10 4...

Страница 6: ...to life and property Please note the specific requirements that must be observed for applications in a hazardous area EExi 1 3 Unpacking The unit is packaged for protection against shock during shipm...

Страница 7: ...r external control resetting MIN MAX buffer tare and limit status The module generates its own stable and precise sensor supply voltage The calibration and configuration data is saved in an EEPROM to...

Страница 8: ...n be used for zero point triggering via proximity switch for instance or for rapid alerting when a setpoint value is exceeded Industry compatible connection and installation technologies makes it easi...

Страница 9: ...pm K approx 6 VA approx 2 kHz 3 dB integral reversible overcurrent and overvoltage protection reverse voltage protection 500 V 0 60 C 30 85 C complies with EMC Directive 89 336 EEC Case Material Dimen...

Страница 10: ...5 50 100 200 400 Hz 1 kHz Analog output Function Monitor output Process status configuration mode approx 8 V max Digital outputs Limits Logic 2 limit outputs 1 classification output too high too low O...

Страница 11: ...clip forwards to release the module from the rail The module must only be installed by a qualified person 4 2 Degree of protection The Sensor Profibus Module type 9221 has IP20 degree of protection T...

Страница 12: ...than two wires should be connected to one terminal Ferrules are recommended for connecting stranded wires Shielded cables must be used for the voltage supply lines and signal conductors to avoid inte...

Страница 13: ...type 9221 has IP65 degree of protection The module is therefore protected against ingress of dust and water jets 5 3 Ambient temperature The permitted ambient temperature range for the Sensor Profibu...

Страница 14: ...Date 27 01 06 Status LEDs Plan view Profibus port RS485 B coded Plan view Address setting Mounting holes Configuration interface RS232 Sensor connectio n Input Output Supply voltage Profibus terminati...

Страница 15: ...nded for connecting stranded wires Shielded cables must be used for the voltage supply lines and signal conductors to avoid interference on sensor signals or in the module 1 5V 2 A 1 4 24 V PLC supply...

Страница 16: ...The processor then linearizes scales and stores the signal in programmable units ready for bus transmission In addition the processor monitors the measured value with respect to user selectable limits...

Страница 17: ...Input Protective ground 3 Input supply voltage ground Terminal block 3 1 Sensor strain gage excitation potentiometer excitation 2 Sensor strain gage sensor lead 3 Sensor strain gage signal input pote...

Страница 18: ...8 1 Address configuration The address must be specified before a controller or a computer can exchange data with a Sensor Profibus Module via a bus The following point must be observed when assigning...

Страница 19: ...Perform teach ins of sensor signals Perform graphical test measurements including data storage in Excel files The configuration software can run on the following operating systems Windows 98 98SE Win...

Страница 20: ...e adequate In this case the sensor lines Pin 2 and Pin 5 are not connected 6 wire connection This connection should be used to achieve the best possible measurement accuracy with strain gages because...

Страница 21: ...e which you can find from the test and calibration certificate for the sensor Input range The input range is calculated and selected as follows Example calculation for a load cell type 8431 100 Input...

Страница 22: ...Page 22 of 82 Date 27 01 06 Input reference No ground reference is selected as the measurement signal input reference for measurement using strain gage sensors with Wheatstone Bridge circuit 7 6...

Страница 23: ...signals measured by the connected sensors and the measured values to be displayed A two point calibration procedure is used here Normally the sensors have a test and calibration certificate containin...

Страница 24: ...ve any load from the load cell and calibrate the zero point F 0 N Now press the Teach in lower calibration value button see A Now apply a known reference weight to the load cell e g F 100 N and set th...

Страница 25: ...data can be found from the certificate About the values These values are adopted directly from the test and calibration certificate This value must be calculated as follows Known Sensitivity in refer...

Страница 26: ...wish to verify that the instrument is working properly with sensors that produce a voltage signal you must measure the sensor excitation voltage using a precision digital voltmeter and then use it to...

Страница 27: ...ignal sensors The sensor is simulated by a precision voltage source The calibration process is identical to that described in 6 9 1 3 1 Calibration using a physical variable by the teach in method exc...

Страница 28: ...nt resistance and the associated calibration offset from the sensor test certificate and select the value under the menu option Channel settings Input reference see The required shunt resistance is li...

Страница 29: ...g a potentiometer Calibration is necessary in order to specify the relationship between the electrical signals measured by the connected sensors and the measured values to be displayed A two point cal...

Страница 30: ...in numbering for the potentiometric position sensor is given in the test and calibration certificate Drawing showing physical arrangement Circuit diagram Upper scale value e g 100mm Lower scale value...

Страница 31: ...certificate A low excitation voltage typically 2 5 5 or 10 volts is recommended to avoid high lead resistances Input range The maximum measurement signal output from potentiometers to the Sensor Profi...

Страница 32: ...ravel where the measurement signal does not change despite movement of the sliding shaft The monitor output from the Sensor Profibus Module can be used for identifying these dead regions The following...

Страница 33: ...tion value Now move the sliding shaft using a calibrated gage block e g S 100 mm and set the upper scale value Now press button B Teach in upper calibration value This calibration data must now be tra...

Страница 34: ...sors and the measured values to be displayed A two point calibration procedure is used here Normally the sensors have a test and calibration certificate containing details of the electrical signals Th...

Страница 35: ...DC in the test certificate the transmitter excitation must be provided by an external supply because the Sensor Profibus Module can provide a maximum supply voltage of 10 VDC Input range The measureme...

Страница 36: ...libration Displacement measurement using a transmitter e g type 8740 5001 Adjust the position sensor to give the zero setting 0 00 mm Now press button A Teach in lower calibration value Now move the s...

Страница 37: ...re adopted directly from the test and calibration certificate The calibration was performed as follows Electrical range of 0 to 5 V corresponds to a mechanical range 0 to 1 mm This calibration data mu...

Страница 38: ...t In order to increase the measurement accuracy in this case the user can select to use averaging as part of signal conditioning This method performs arithmetic averaging over a number of measured val...

Страница 39: ...nt gives the corresponding output value unbalance This output value can be compared to the value from the testing and calibration certificate Tolerance value For entering the tolerance value for the r...

Страница 40: ...stomized by defining threshold values limits For instance user definable thresholds GW1 and GW2 can be used for alarm or threshold monitoring at the outputs A1 A2 and the additional output A3 used for...

Страница 41: ...or static evaluation the evaluation result obtained once a threshold value is crossed is retained until the next evaluation reset 6 10 5 Minimum and Maximum value buffer To clear or reset the minimum...

Страница 42: ...n is executed Perform tare Clear tare Reset evaluation Reset minimum value buffer Reset maximum value buffer Inhibit evaluation freeze current evaluation result You can assign just one of these functi...

Страница 43: ...1 Idle LED yellow on off serious error program execution stopped flashing normal program execution 2 PROFIBUS LED green flashing rapidly no baud rate detected flashing slowly baud rate detected but no...

Страница 44: ...alue tare value and the minimum and maximum values in the selected cycle step options are displayed and updated Click on the corresponding Reset button to reset the minimum or maximum values during th...

Страница 45: ...played in the graphical display You can also switch between displaying the graphs as a continuous trace or a complete cycle Start trigger settings Limit values A threshold limit value on the X or Y ax...

Страница 46: ...n and Remark texts can optionally be saved for reuse in another test measurement To change the file name and path click the Change button If you don t supply a file name the Excel file displayed will...

Страница 47: ...e allows up to 32 bus stations to be connected simultaneously in each bus segment Additional bus segments can be created using repeaters taking the maximum number of stations to 127 7 4 Transmission s...

Страница 48: ...connection Pin RS485 designation Signal Meaning 1 Shield Shield Protective Ground 3 B B RxD TxD P Receive Transmit Data P 5 C C DGND Data Ground 6 VP Voltage Plus 8 A A RxD TxD N Receive Transmit Data...

Страница 49: ...ded cables are recommended where there is increased risk of interference e g in an industrial environment The supply cables and signal leads should also be shielded in this case In general the shield...

Страница 50: ...e complies with the Profibus specification to DIN 19245 or EN50170 the Sensor Profibus Module supports both Profibus DP V0 and Profibus DP V1 functionality 8 2 1 Cyclic communication DP V0 8 2 1 1 Mod...

Страница 51: ...uffer Contents of max value buffer 2 2 4 4 4 16 bytes PLCout Upper limit Lower limit 2 4 4 10 bytes 7 PLCin Mirror Current measured value Tared value Contents of min value buffer Contents of max value...

Страница 52: ...of 2nd control byte MSB LSB State Shunt C State Shunt B State Shunt A Handshake adopt upper limit lower limit Handshake Save setup in EEPROM State Test method ALT DC B State Test method ALT DC A Hand...

Страница 53: ...ied as action oriented and state oriented Action oriented A positive edge on the control line concerned is intended to start an action e g tare Once the action has been started the control line can re...

Страница 54: ...ag is reset because the present evaluation is invalid Perform TARE A 0 1 edge on this bit starts a tare operation A measured value is obtained from 500 1ms readings The current measured value is subtr...

Страница 55: ...ore the instrument starts working in the new measuring mode This setting is not saved automatically in the EEPROM Save setup in EEPROM A 0 1 edge on this bit saves the current device setup in the EEPR...

Страница 56: ...0xA3 0xA3 0x93 0x93 0x93 Mode 5 0xA1 0x93 0x93 0x93 0x93 Mode 6 0xA1 0xA3 0xA3 0x93 0x93 0x93 0x93 Mode 7 0xA1 0x93 0x93 0x93 0x93 0x93 Mode 8 0xA1 0xA3 0xA3 0x93 0x93 0x93 0x93 0x93 Note By setting t...

Страница 57: ...1 0 1 Output byte 2 0 Data from slave to master Byte Meaning Section Comments 0 Input byte 1 0 1 Input byte 2 0 2 Mirror byte 1 0 3 Mirror byte 2 0 4 Current measured value byte 1 4 5 Current measured...

Страница 58: ...sd file 6 Lower limit byte 1 4 7 Lower limit byte 2 3 8 Lower limit byte 3 2 9 Lower limit byte 4 1 The byte sequence can be changed in the gsd file Data from slave to master Byte Meaning Section Comm...

Страница 59: ...byte 1 0 1 Input byte 2 0 2 Mirror byte 1 0 3 Mirror byte 2 0 4 Current measured value byte 1 4 5 Current measured value byte 2 3 6 Current measured value byte 3 2 7 Current measured value byte 4 1 T...

Страница 60: ...e 3 2 9 Lower limit byte 4 1 The byte sequence can be changed in the gsd file Data from slave to master Byte Meaning Section Comments 0 Input byte 1 0 1 Input byte 2 0 2 Mirror byte 1 0 3 Mirror byte...

Страница 61: ...measured value byte 3 2 7 Current measured value byte 4 1 The byte sequence can be changed in the gsd file 8 Contents of min value buffer byte 1 4 9 Contents of min value buffer byte 2 3 10 Contents o...

Страница 62: ...byte 1 0 1 Input byte 2 0 2 Mirror byte 1 0 3 Mirror byte 2 0 4 Current measured value byte 1 4 5 Current measured value byte 2 3 6 Current measured value byte 3 2 7 Current measured value byte 4 1 T...

Страница 63: ...nce can be changed in the gsd file 8 Tared value byte 1 4 9 Tared value byte 2 3 10 Tared value byte 3 2 11 Tared value byte 4 1 The byte sequence can be changed in the gsd file 12 Contents of min val...

Страница 64: ...measured value byte 1 4 5 Current measured value byte 2 3 6 Current measured value byte 3 2 7 Current measured value byte 4 1 The byte sequence can be changed in the gsd file 8 Tared value byte 1 4 9...

Страница 65: ...nterpret the addressed value properly What sort of variable type is this value how many bytes must be read how should these bytes be interpreted There is no point e g reading just 3 bytes of a 4 byte...

Страница 66: ...ues Load default settings from the user area This does not affect the factory calibration write any byte 6 write user settings to EEPROM read user settings from EEPROM U8 rw 1 EVENT Valid values Load...

Страница 67: ...yte 7 Measure lower calibration value U8 wo 1 EVENT Valid values Sensor reading currently at input is measured as lower calibration value write any byte 8 Compute calibration U8 wo 1 EVENT Valid value...

Страница 68: ...values Function not supported 0 Function supported 1 7 Input A function Reset mean value U8 rw 1 Valid values Function not supported 0 Function supported 1 6 Input B function 1 Input B function Perfo...

Страница 69: ...asure sensor test reference value U8 wo 1 EVENT Valid values Adopt current measured value as new sensor test reference value write any byte 2 Sensor test reference value REAL32 rw 4 Valid values New s...

Страница 70: ...Tare value REAL32 rw 4 Valid values Write read tare value 11 Measured values 1 ADC value S16 ro 2 Valid values Current uncalibrated measured value in LSB 2 Measured value REAL32 ro 4 Valid values Cali...

Страница 71: ...ts The number is composed from this formula 0 1 2 1 127 mant x ex sign Equation 71 1 The mantissa is thus saved without the leading 1 hence the term 1 0 mant The exponent is represented with a bias of...

Страница 72: ...t 6 Bit 5 Bit 4 Bit3 Bit 2 Bit 1 Bit 0 LSB S E7 E6 E5 E4 E3 E2 E1 2nd byte second byte bit 7 bit 6 bit 5 bit 4 Bit3 bit 2 bit 1 bit 0 E0 M22 M21 M20 M19 M18 M17 M16 3rd byte third byte bit 7 bit 6 bit...

Страница 73: ...11 1110b M 100 0000 0000 0000 0000 0000b S 0 E 0x7E dec 126 M 0x400000 The value in the mantissa field is interpreted as places after the decimal point in the following way 1 0 0 0 0 0 0 0 0 0 0 0 0 0...

Страница 74: ...0000 0000 0000b Taking into account the exponent A negative exponent shifts the decimal point to the left a positive exponent to the right Thus if an exponent of 3 was calculated the decimal point is...

Страница 75: ...Page 75 of 82 Date 27 01 06 9 Dimensioned drawings 9 1 IP 20 version 9 2 IP 65 version View from below Rear view Rear view View from side View from side...

Страница 76: ...Page 76 of 82 Date 27 01 06 View with fixing clips for rail mounting type 9221 Z001 Side view View from below Mounting plate 155x100x5 for clips IP65 enclosure Clip fastening...

Страница 77: ...measurement quality In addition the examples should make it easier to use the system in practice Ground reference open circuit 9221 Ground reference short circuit Preferably also grounded externally 9...

Страница 78: ...sume that a load cell with an upper range value of 50 kN and a sensitivity of 2 mV V is connected to a Sensor Profibus Module 9221 whose input range is set to 12 5 mV and which supplies the load cell...

Страница 79: ...practical sense to select a value of N 1000 for quasi static processes max 6500 are possible The resolution of the transferred measurements does not equal the quantization error this error can be sig...

Страница 80: ...er calibration value 0 0 Scale Upper calibration value 1 0 PROFIBUS ID 2 Full calibration factor 1 0 Full calibration offset 0 0 These values are set by invoking the command DEFA and then saving them...

Страница 81: ...s required during this time will be made without charge If the instrument needs to be returned for repairs please note the following requirements for packing and shipping if you have a problem with th...

Страница 82: ...ype 9900 V225 Female coupling connector for PLC interface 5 pin M12 type 9900 V525 Snap fit rail mounting kit type 9221 Z001 Options Calibration of a complete measuring chain type 9221 Z001 This servi...

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