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Analog value representation

4.3 Measuring ranges

2AI TC HF analog electronic module (6ES7134-4NB01-0AB0)
Manual, 04/2007, A5E01076892-01

4.3

Measuring ranges

4.3.1

Measuring ranges for thermocouples

Introduction

The following tables contain the digitized analog values for the measuring ranges of the

analog input modules.
Since the binary representation of the analog values is always the same, these tables only

compare the measuring ranges with the units.

Measuring range for thermocouple: Type B

Table 4-3

SIMATIC S7 format: Type B measuring range in °C and °F

Units

Type B in °C

Decimal Hexadecima

Type B in °F

Decimal

Hexadeci

mal

Range

> 2070,0

32767

7FFF

> 3276,6

32767

7FFF

Overflow

2070,0

1820,1

20700

18201

50DC

4719

3276,6

2786,6

32766

27866

7FFE

6CDA

Overshoot range

1820,0

0,0

18200

4718

0000

2786,5

27865

320

6CD9

0140

Nominal range

-0,1

-120,0

-1

-1200

FFFF

FB50

31,9

-184,0

319

-1840

013F

F8D0

Underrange

< -120,0

-32768

8000

< -184,0

-32768

8000

Underflow

Summary of Contents for 2AI TC HF

Page 1: ...B0 ______________ ______________ ______________ ______________ ______________ Preface Properties 1 Parameters 2 Diagnostics 3 Analog value representation 4 Connecting 5 SIMATIC ET 200S distributed I O 2AI TC HF analog electronic module 6ES7134 4NB01 0AB0 Manual 04 2007 A5E01076892 01 ...

Page 2: ...ntation Commissioning and operation of a device system may only be performed by qualified personnel Within the context of the safety notes in this documentation qualified persons are defined as persons who are authorized to commission ground and label devices systems and circuits in accordance with established safety practices and standards Prescribed Usage Note the following WARNING This device m...

Page 3: ...t describes the components that are valid at the time of publication Recycling and disposal Thanks to the fact that it is low in contaminants this ET 200S module is recyclable For environmentally compliant recycling and disposal of your electronic waste please contact a company certified for the disposal of electronic waste Additional support If you have any questions relating to the products desc...

Page 4: ...0 5050 223 For more information about our technical support refer to our Web site at http www siemens de automation service Service Support on the Internet In addition to our documentation services you can also make use of our comprehensive online knowledge base on the Internet http www siemens com automation service support There you will find Our Newsletter which constantly provides you with the...

Page 5: ...troduction 17 4 2 Analog value representation for measuring range with SIMATIC S7 17 4 3 Measuring ranges 19 4 3 1 Measuring ranges for thermocouples 19 4 3 2 Voltage measuring ranges 24 4 4 Effect on analog value representation 25 4 4 1 Effect of the supply voltage and the operating state on analog input values 25 4 4 2 Effect of the value range on the 2AI TC HF analog input 25 5 Connecting 27 5 ...

Page 6: ...Table of contents 2AI TC HF analog electronic module 6ES7134 4NB01 0AB0 6 Manual 04 2007 A5E01076892 01 ...

Page 7: ...mocouples Types E N J K L S R B T C resolution 15 bits sign Isolated from the load voltage L Linearization of the sensor characteristic curves Permitted common mode voltage 140 VDC 100 VAC Internal reference junction in connection with TM E15S24 AT or TM E15C24 AT General terminal assignment Terminal assignment for 2AI TC HF 6ES7134 4NB01 0AB0 Terminal Assignment Terminal Assignment Notes 1 M0 5 M...

Page 8: ...ble terminal modules Usable terminal modules for 2AI TC HF 6ES7134 4NB01 0AB0 TM E15C24 AT 6ES7193 4CL30 0AA0 Spring terminal TM E15S24 AT 6ES7193 4CL20 0AA0 Screw type terminal 0 0 6DPSOH FRQQHFWLRQ Block diagram 0 1 9 0 3 3 08 9 70 6 7 7 6 EDFNSODQH EXV LQWHUIDFH FRQQHFWLRQ DFNSODQH EXV QWHUQDO UHIHU HQFH MXQFWLRQ Figure 1 1 Block diagram of the 2AI TC HF ...

Page 9: ...Permissible potential difference Between MANA and the central grounding point Uiso 75 VDC 60 VAC Between the inputs and MANA UCM 140 VDC 100 VAC Insulation tested 500 VDC Current consumption From load voltage L Max 30 mA Power dissipation of the module Typically 0 6 W Status interrupts diagnostics Diagnostics function Group error Red SF LED Diagnostic functions readable Yes Analog value generation...

Page 10: ...c error limit for thermocouples operational limit at 25 C with reference to input range 1 1 K Basic error limit for thermocouples of type C operational limit at 25 C with reference to the input range 1 5 K Temperature error with reference to the input range 0 005 K Linearity error with reference to the input range 0 01 Repeatability in steady state at 25 C with reference to input range 0 05 Overal...

Page 11: ... Compensation of thermocouples with a compensating box As well as the error limits of the 2AI TC HF electronic module see Table Technical specifications 2AI TC HF 6ES7134 4NB01 0AB0 in this chapter you must also take the accuracy of the compensating box into account Internal compensation with TM E 15S24 AT or TM E15C24 AT Factors affecting the accuracy of the temperature measurement The connected ...

Page 12: ...Properties 1 1 2AI TC HF analog electronic module 6ES7134 4NB01 0AB0 2AI TC HF analog electronic module 6ES7134 4NB01 0AB0 12 Manual 04 2007 A5E01076892 01 ...

Page 13: ...hannel Smoothing None Weak Medium Strong None Channel Temperature unit Celsius Fahrenheit Celsius Module Comparison point None Yes i e internal None Channel Type range of measurement Deactivated Voltage 80 mV TC EL Type T Cu CuNi TC EL Type K NiCr Ni TC EL Type B PtRh PtRh TC EL Type C WRe WRe TC EL Type N NiCrSi NiSi TC EL Type E NiCr CuNi TC EL Type R PtRh Pt TC EL Type S PtRh Pt TC EL Type J Fe...

Page 14: ...adjusted in four steps in which the smoothing factor k multiplied with cycle time of the electronic module equals the time constant of the smoothing filter The greater the smoothing the greater the time constant of the filter The following diagrams show the step response with the various smoothing factors in relation to the number of module cycles 1RQH N HDN N 0HGLXP N 6WURQJ N 0RGXOH F FOHV 6WHS ...

Page 15: ... 3 1 Diagnostics using LED display LED display 1 6 Batch error red Status and error displays Event LED SF Cause Remedy On No configuration or incorrect module plugged in No load voltage present There is a diagnostic message Check the parameter assignment Check the load voltage Evaluate the diagnostics ...

Page 16: ...n Correct the parameter assignment wire break diagnostics only parameterized for the permitted measuring ranges 9D 01001 Error Internal module error diagnostic message at channel 0 applies to the entire module Replace the module 7D 00111 Upper limit exceeded Value is above the overshoot range Correct the module final controlling element tuning 8D 01000 Lower limit value undershot Value is below th...

Page 17: ...ng 4 2 Analog value representation for measuring range with SIMATIC S7 Analog value representation With the same nominal range the digitized analog value is the same for input and output values Analog values are represented in two s complement The following table shows the analog value representation of the analog electronic modules Table 4 1 Analog value representation SIMATIC S7 format Resolutio...

Page 18: ...and hexadecimal representation of the units of the analog values The table below shows the resolutions 11 12 13 and 15 bit sign Each analog value is entered left aligned in the ACCU The bits marked with x are set to 0 Table 4 2 Output values SIMATIC S7 format Units Analog value Resolution in bits Decimal Hexadecimal High byte Low byte 11 S 16 10H S 0 0 0 0 0 0 0 0 0 1 x x x x 12 S 8 8H S 0 0 0 0 0...

Page 19: ...e same these tables only compare the measuring ranges with the units Measuring range for thermocouple Type B Table 4 3 SIMATIC S7 format Type B measuring range in C and F Units Units Type B in C Decimal Hexadecima l Type B in F Decimal Hexadeci mal Range 2070 0 32767 7FFFH 3276 6 32767 7FFFH Overflow 2070 0 1820 1 20700 18201 50DCH 4719H 3276 6 2786 6 32766 27866 7FFEH 6CDAH Overshoot range 1820 0...

Page 20: ...ange 2315 0 0 0 23150 0 5A6EH 0000H 2786 5 32 0 27865 320 6CD9H 0140H Nominal range 0 1 120 0 1 1200 FFFFH FB50H 31 9 184 0 319 1840 013FH F8D0H Underrange 120 0 32768 8000H 184 0 32768 8000H Underflow Measuring range for thermocouple Type E Table 4 5 SIMATIC S7 format Type E measuring range in C and F Units Units Type E in C Decimal Hexadecima l Type E in F Decimal Hexadeci mal Range 1200 0 32767...

Page 21: ...20 21921 6734H 55A1H Overshoot range 1200 0 210 0 12000 2100 2EE0H F7CCH 2192 0 346 0 21920 3460 55A0H F27CH Nominal range 210 0 32768 8000H 346 0 32768 8000H Underflow Measuring range for thermocouple Type K Table 4 7 SIMATIC S7 format Type K measuring range in C and F Units Units Type K in C Decimal Hexadecima l Type K in F Decimal Hexadeci mal Range 1622 0 32767 7FFFH 2951 6 32767 7FFFH Overflo...

Page 22: ...20 16521 521CH 4089H Overshoot range 900 0 200 0 9000 2000 2328H F830H 1652 0 328 0 16520 3280 4088H F330H Nominal range 200 0 32768 8000H 328 0 32768 8000H Underflow Measuring range for thermocouple Type N Table 4 9 SIMATIC S7 format Type N measuring range in C and F Units Units Type N in C Decimal Hexadecima l Type N in F Decimal Hexadeci mal Range 1550 0 32767 7FFFH 2822 0 32767 7FFFH Overflow ...

Page 23: ...shoot range 1769 0 50 0 17690 500 451AH FE0CH 3216 2 58 0 32162 580 7DA2H FDBCH Nominal range 50 1 170 0 510 1700 FE0BH F95CH 58 1 274 0 581 2740 FDBBH F54CH Underrange 170 0 32768 8000H 274 0 32768 8000H Underflow Measuring range for thermocouple Type T Table 4 11 SIMATIC S7 format Type T measuring range in C and F Units Units Type T in C Decimal Hexadecima l Type T in F Decimal Hexadeci mal Rang...

Page 24: ...0H Underflow Measured values in the event of a wire break depending on the diagnostics enabled for voltage measurement In the case of the measuring ranges for types B C E J K L N R S and T thermocouples the following additional information applies Table 4 13 Measured values in the event of a wire break depending on the diagnostics enabled for voltage measurement Measured values Format Parameter as...

Page 25: ...le on the CPU of the DP master Process values L present 7FFFH until first conversion after startup or after assignment of parameters for the module is completed POWER ON RUN L missing 7FFFH L present Process value POWER ON STOP L missing 7FFFH L present POWER OFF L missing 4 4 2 Effect of the value range on the 2AI TC HF analog input The way electronic modules respond to analog inputs depends on w...

Page 26: ...Analog value representation 4 4 Effect on analog value representation 2AI TC HF analog electronic module 6ES7134 4NB01 0AB0 26 Manual 04 2007 A5E01076892 01 ...

Page 27: ...e case you should only ground the shield at one end of the cable Analog input modules The analog input modules are electrically isolated Between the logic and backplane bus Between the load voltage and the channels Electrical isolation No link between MANA and the central grounding point UISO Note Ensure that this difference in potential UISO does not exceed the permitted value If there is a possi...

Page 28: ...measuring encoders The isolated measuring encoders are not connected to the local ground potential These can be potential free Depending on local conditions or interference potential differences UCM static or dynamic can occur between the measuring lines M of the input channels and the reference point of the measuring circuit MANA The permitted value for UCM must not be exceeded even in environmen...

Page 29: ...namic can occur between the locally distributed measuring points If the permitted value for UCM is exceeded there must be equipotential bonding conductors between the measuring points The following schematic representation illustrates the connection of non isolated measuring encoders to an optically isolated analog input module 5 4 1 2 3 0 0 0 0 0 8 0 8 8 62 Logic Backplane bus Ground bus Equipote...

Page 30: ... is incorrect None Using a compensating box on the supply lines of a single thermocouple You compensate using a compensating box The compensating box is the transition point from the Cu line to the thermocouple line No further processing is necessary using the 2AI TC ST None Internal compensation in the case of the 2AI TC HF There is a temperature sensor in the TM E15S24 AT and TM E15C24 AT termin...

Page 31: ...ve or negative compensation voltage occurs this is added to the thermo electromotive force Compensating boxes with a comparison point temperature of 0 C must be used for the compensation of the analog input modules Note The power supply to the compensating box must be isolated The power supply unit must have adequate interference filtering by means of a grounded shielding winding for example 5 3 W...

Page 32: ... 04 2007 A5E01076892 01 5 4 Using the shield connection Rules To prevent interference we recommend the following for analog electronic modules Use shielded wires to the sensors and actuators Lay out the wire shields on the shield connection Connect the shield connection to the ground bus with low impedance ...

Page 33: ...27 Compensation of the comparison point temperature 30 Connecting 27 30 Connecting measuring encoders to analog inputs 27 D Disposal 3 I Internet Service Support 4 Isolated measuring encoders 28 L LED display 15 M Measured value resolution 18 Measuring ranges with SIMATIC S7 17 N Non isolated measuring encoders 29 Non isolated thermocouples 29 R Recycling 3 Response of the analog modules 25 During...

Page 34: ...Index 2AI TC HF analog electronic module 6ES7134 4NB01 0AB0 34 Manual 04 2007 A5E01076892 01 ...

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