Analog Value Representation for Analog Input Channels

Analog Modules

STEP 7 blocks for analog functions

4.3 Analog Value Representation

4.3.1 Analog Value Representation for Analog Input Channels

Introduction

The tables in this chapter contain the measured value representations for the various measuring ranges of the analog input modules. The values in the tables apply to all modules with the corresponding measuring ranges.

Notes for readers of the tables

Tables 4-7 to 4-8 contain the binary representation of the measured values.

Since the binary representation of the measured values is always the same, starting at 4-9 these tables only contain the measured values and the units.

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Measured value resolution

The resolution of the analog values can vary depending upon the analog module and its parameterization. With resolutions < 15 bit all bits identified with ”x” will be set to ”0”.

Note: This resolution does not apply to temperature values. The transformed temperature values are the result of a conversion within the analog module (see tables 4-15 through 4-29).

Table 4-6 Possible Resolutions of the Analog Values

Resolution in bits Units Analog value

(+sign)

decimal hexadecimal High Byte Low Byte

8 128 80_H VZ 0 0 0 0 0 0 0 1 x x x x x x x

9 64 40_H VZ 0 0 0 0 0 0 0 0 1 x x x x x x

10 32 20_H VZ 0 0 0 0 0 0 0 0 0 1 x x x x x

11 16 10_H VZ 0 0 0 0 0 0 0 0 0 0 1 x x x x

12 8 8_H VZ 0 0 0 0 0 0 0 0 0 0 0 1 x x x

13 4 4_H VZ 0 0 0 0 0 0 0 0 0 0 0 0 1 x x

14 2 2_H VZ 0 0 0 0 0 0 0 0 0 0 0 0 0 1 x

15 1 1_H VZ 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1

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Binary representation of the input ranges

The input ranges shown in Tables 4-7 to 4-8 are defined in two’s complement representation:

Table 4-7 Bipolar Input Ranges

Units Measured Data Word Range

Value

in % ²¹⁵ ²¹⁴ ²¹³ ²¹² ²¹¹ ²¹⁰ ²⁹ ²⁸ ²⁷ ²⁶ ²⁵ ²⁴ ²³ ²² ²¹ ²⁰

32767 118.515 0 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 Overflow

32511 117.589 0 1 1 1 1 1 1 0 1 1 1 1 1 1 1 1 Overrange

27649 100.004 0 1 1 0 1 1 0 0 0 0 0 0 0 0 0 1

27648 100.000 0 1 1 0 1 1 0 0 0 0 0 0 0 0 0 0

1 0.003617 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1

0 0.000 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Rated

– 1 – 0.003617 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 range

– 27648 – 100.000 1 0 0 1 0 1 0 0 0 0 0 0 0 0 0 0

– 27649 – 100.004 1 0 0 1 0 0 1 1 1 1 1 1 1 1 1 1

Under-– 32512 – 117.593 1 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 range

– 32768 – 117.596 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Underflow

Table 4-8 Unipolar Input Ranges

Units Measured Data Word Range

Value

in % ²¹⁵ ²¹⁴ ²¹³ ²¹² ²¹¹ ²¹⁰ ²⁹ ²⁸ ²⁷ ²⁶ ²⁵ ²⁴ ²³ ²² ²¹ ²⁰

32767 118.515 0 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 Overflow

32511 117.589 0 1 1 1 1 1 1 0 1 1 1 1 1 1 1 1

Over-27649 100.004 0 1 1 0 1 1 0 0 0 0 0 0 0 0 0 1 range

27648 100.000 0 1 1 0 1 1 0 0 0 0 0 0 0 0 0 0 Rated

1 0.003617 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 range

0 0.000 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0

– 1 – 0.003617 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1

Under-– 4864 – 17.593 1 1 1 0 1 1 0 1 0 0 0 0 0 0 0 0

range

– 32768 – 17.596 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Underflow

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Analog value representation in voltage measuring ranges

Table 4-9 Analog Value Representation in Voltage Measuring Ranges ± 10 V to ± 1 V

System Voltage Measuring Range

Dec. Hex. ± 10 V ± 5 V ± 2.5 V ± 1 V

118.515 % 32767 7FFF 11.851 V 5.926 V 2.963 V 1.185 V Overflow 117.593 % 32512 7F00

117.589 % 32511 7EFF 11.759 V 5.879 V 2.940 V 1.176 V Overrange 27649 6C01

100.000 % 27648 6C00 10 V 5 V 2.5 V 1 V

75.000 % 20736 5100 7.5 V 3.75 V 1.875 V 0.75 V 0.003617 % 1 1 361.7 V 180.8 V 90.4 V 36.17 V

0 % 0 0 0 V 0 V 0 V 0 V Rated range

– 1 FFFF

– 75.000 % – 20736 AF00 – 7.5 V – 3.75 V – 1.875 V – 0.75 V – 100.000 % – 27648 9400 – 10 V – 5 V – 2.5 V – 1 V

– 27649 93FF Underrange

– 117.593 % – 32512 8100 – 11.759 V – 5.879 V – 2.940 V – 1.176 V

– 117.596 % – 32513 80FF Underflow

– 118.519 % – 32768 8000 – 11.851 V – 5.926 V – 2.963 V – 1.185 V

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Table 4-10 Analog Value Representation in Voltage Measuring Ranges ± 500 mV to ± 80 mV

System Voltage Measuring Range

Dec. Hex. ± 500 mV ± 250 mV ± 80 mV

118.515 % 32767 7FFF 592.6 mV 296.3 mV 94.8 mV Overflow 117.593 % 32512 7F00

117.589 % 32511 7EFF 587.9 mV 294.0 mV 94.1 mV Overrange 27649 6C01

100.000 % 27648 6C00 500 mV 250 mV 80 mV

75.00 % 20763 5100 375 mV 187.5 mV 60 mV 0.003617 % 1 1 18.08 V 9.04 V 2.89 V

0 % 0 0 0 mV 0 mV 0 mV Rated range

– 1 FFFF

– 75.00 % – 20763 AF00 – 375 mV – 187.5 mV – 60 mV – 100.000 % – 27648 9400 – 500 mV – 250 mV – 80 mV

– 27649 93FF Underrange

– 117.593 % – 32512 8100 – 587.9 mV – 294.0 mV – 94.1 mV

– 117.596 % – 32513 80FF Underflow

– 118.519 % – 32768 8000 – 592.6 mV – 296.3 mV – 94.8 mV

Table 4-11 Analog Value Representation in Voltage Measuring Ranges 1 to 5 V and 0 to 10 V

System Voltage Measuring Range

Dec. Hex. 1 to 5 V 0 to 10 V

118.515 % 32767 7FFF 5.741 V 11.852 V Overflow

117.593 % 32512 7F00

117.589 % 32511 7EFF 5.704 V 11.759 V Overrange

27649 6C01

100.000 % 27648 6C00 5 V 10 V

75 % 20736 5100 3.75 V 7.5 V

0.003617 % 1 1 1 V + 144.7 V 0 V + 361.7 V Rated range

0 % 0 0 1 V 0 V

– 1 FFFF Underrange

– 17.593 % – 4864 ED00 0.296 V No negative values

– 4865 ECFF possible

Underflow

–17.596 % – 32768 8000

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Analog value representation in current measuring ranges

Table 4-12 Analog Value Representation in Current Measuring Ranges ± 20 mA to ± 3.2 mA

System Current Measuring Range

Dec. Hex. ± 20 mA ± 10 mA ± 3.2 mA

118.515 % 32767 7FFF 23.70 mA 11.85 mA 3.79 mA Overflow 117.593 % 32512 7F00

117.589 % 32511 7EFF 23.52 mA 11.76 mA 3.76 mA Overrange 27649 6C01

100.000 % 27648 6C00 20 mA 10 mA 3.2 mA

75 % 20736 5100 15 mA 7.5 mA 2.4 mA

0.003617 % 1 1 723.4 nA 361.7 nA 115.7 nA

0 % 0 0 0 mA 0 mA 0 mA Rated range

– 1 FFFF

– 75 % –5100 AF00 – 15 mA – 7.5 mA – 2.4 mA – 100.000 % – 27648 9400 –20 mA –10 mA –3.2 mA

– 27649 93FF Underrange

– 117.593 % – 32512 8100 –23.52 mA –11.76 mA –3.76 mA

– 117.596 % – 32513 80FF Underflow

– 118.519 % – 32768 8000 –23.70 mA –11.85 mA –3.79 mA

Table 4-13 Analog Value Representation in Current Measuring Ranges 0 to 20 mA and 4 to 20 mA

System Current Measuring Range

Dec. Hex. 0 to 20 mA 4 to 20 mA

118.515 % 32767 7FFF 23.70 mA 22.96 mA Overflow 117.593 % 32512 7F00

117.589 % 32511 7EFF 23.52 mA 22.81 mA Overrange 27649 6C01

100.000 % 27648 6C00 20 mA 20 mA

75 % 20736 5100 15 mA 15 mA

0.003617 % 1 1 723.4 nA 4 mA + 578.7 nA Rated range

0 % 0 0 0 mA 4 mA

– 1 FFFF Underrange

– 17.593 % – 4864 ED00 – 3.52 mA 1.185 mA

– 4865 ECFF Underflow

–17.596 % – 32768 8000

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Analog value representation for resistance-type transmitters

Table 4-14 Analog Value Representation for Resistance-Type Transmitters 10 k and from 150 to 600

System Resistance-Type Transmitter Range

Dec. Hex. 10 k 150 300 600

118.515 % 32767 7FFF 11.852 k 177.77 355.54 711.09 Overflow 117.593 % 32512 7F00

117.589 % 32511 7EFF 11.759 k 176.38 352.77 705.53 Overrange (negative values physically

not possible)

Analog value representation for RTD resistance temperature detectors Pt x00 standard

Table 4-15 Analog Value Representation for RTD Resistance Temperature Detectors PT 100, 200, 500,1000

Pt x00

> 1000.0 32767 7FFF_H > 1832.0 32767 7FFF_H > 1273.2 32767 7FFF_H Overflow 1000.0

Analog value representation for RTD resistance temperature detectors Pt x00 climate

Table 4-16 Analog Value Representation for RTD Resistance Temperature Detectors Pt 100. 200, 500,1000

Pt x00

> 155.00 32767 7FFF_H > 311.00 32767 7FFF_H Overflow 155.00

< – 145.00 –32768 8000_H < – 229.00 –32768 8000_H Underflow

Analog value representation for RTD resistance temperature detectors Ni x00 standard

Table 4-17 Analog Value Representation for RTD Resistance Temperature Detectors Ni100, 120, 200, 500, 1000

Ni x00

> 295.0 32767 7FFF_H > 563.0 32767 7FFF_H > 568.2 32767 7FFF_H Overflow

295.0 2950 B86_H 563.0 5630 15FE_H 568.2 5682 1632_H

: : : : : : : : : Overrange

250.1 2501 9C5_H 482.1 4821 12D5_H 523.3 5233 1471_H

250.0 2500 9C4_H 482.0 4820 12D4_H 523.2 5232 1470_H

: : : : : : : : : Rated range

–60.0 –600 FDA8_H –76.0 –760 FD08_H 213.2 2132 854_H

–60.1 –601 FDA7_H –76.1 –761 FD07_H 213.1 2131 853_H

: : : : : : : : : Underrange

–105.0 –1050 FBE6_H –157.0 –1570 F9DE_H 168.2 1682 692_H

< –105.0 –32768 8000_H < –157.0 –32768 8000_H < 168.2 32768 8000_H Underflow

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Analog value representation for RTD resistance temperature detectors Ni x00 climate

Table 4-18 Analog Value Representation for RTD Resistance Temperature Detectors Ni 100, 120, 200, 500, 1000

Ni x00

> 295.00 32767 7FFF_H > 325.11 32767 7FFF_H Overflow 295.00

< – 105.00 –32768 8000_H < – 157.00 –32768 8000_H Underflow

Analog value representation for RTD resistance temperature detectors Cu 10 standard

Table 4-19 Analog Value Representation for RTD Resistance Temperature Detectors Cu 10 Cu 10

> 312.0 32767 7FFF_H > 593.6 32767 7FFF_H > 585.2 32767 7FFF_H Overflow 312.0

< – 240.0 –32768 8000_H < – 400.0 –32768 8000_H < 33.2 32768 8000_H Underflow

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Analog value representation for RTD resistance temperature detectors Cu 10 climate

Table 4-20 Analog Value Representation for RTD Resistance Temperature Detectors Cu 10 Cu 10

> 180.00 32767 7FFF_H > 325.11 32767 7FFF_H Overflow 180.00

< – 60.00 –32768 8000_H < – 76.00 –32768 8000_H Underflow

Analog value representation for Thermocouple temperature detectors type B

Table 4-21 Analog Value Representation for Thermocouple Temperature Detectors Type B

Units Units Units

Type B

in C dec. hex. Type B

in F dec. hex. Type B

in K dec. hex. Range

> 2070.0 32767 7FFF_H > 3276.6 32767 7FFF_H > 2343.2 32767 7FFF_H Overflow 2070.0

< –120.0 –32768 8000_H < –184.0 –32768 8000_H < 153.2 32768 8000_H Underflow

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Analog value representation for Thermocouple temperature detectors type E

Table 4-22 Analog Value Representation for Thermocouple Temperature Detectors Type E Type E

Units Type E

Units Type E Units

in C

dec. hex. in F

dec. hex. in K

dec. hex. Range

> 1200.0 32767 7FFF_H > 2192.0 32767 7FFF_H > 1473.2 32767 7FFF_H Overflow 1200.0

< –270.0 < –2700 < F574_H < –454.0 < –4540 <EE44_H < 0 <0 <0000_H Underflow In the case of incorrect wiring (e.g. polarity reversal or open inputs) or of a sensor error in the negative

range (e.g. incorrect thermocouple type), the analog input module signals underflow below ...

... F0C4_H and outputs 8000_H. ... FB70_H and outputs 8000_H. ... E5D4_H and outputs 8000_H.

Analog value representation for Thermocouple temperature detectors type J

Table 4-23 Analog Value Representation for Thermocouple Temperature Detectors Type J

Units Units Units

Type J

in C dec. hex. Type J

in F dec. hex. Type J

in K dec. hex. Range

> 1450.0 32767 7FFF_H > 2642.0 32767 7FFF_H > 1723.2 32767 7FFF_H Overflow 1450.0

< –210.0 < –2100 <F7CC_H < –346.0 < –3460 <F27C_H < 63.2 < 632 < 0278_H Underflow In the case of incorrect wiring (e.g. polarity reversal or open inputs) or of a sensor error in the negative

range (e.g. incorrect thermocouple type), the analog input module signals underflow below ...

... F31C_H and outputs 8000_H. ... EA0C_H and outputs 8000_H. ... FDC8_H and outputs 8000_H.

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Analog value representation for Thermocouple temperature detectors type K

Table 4-24 Analog Value Representation for Thermocouple Temperature Detectors Type K

Units Units Units

Type K

in C dec. hex. Type K

in F dec. hex. Type K

in K dec. hex. Range

> 1622.0 32767 7FFF_H > 2951.6 32767 7FFF_H > 1895.2 32767 7FFF_H Overflow 1622.0 In the case of incorrect wiring (e.g. polarity reversal or open inputs) or of a sensor error in the negative

range (e.g. incorrect thermocouple type), the analog input module signals underflow below ...

... F0C4_H and outputs 8000_H. ... E5D4_H and outputs 8000_H. ... FB70_H and outputs 8000_H.

Analog value representation for Thermocouple temperature detectors type L

Table 4-25 Analog Value Representation for Thermocouple Temperature Detectors Type L

Units Units Units

> 1150.0 32767 7FFF_H > 2102.0 32767 7FFF_H > 1423.2 32767 7FFF_H Overflow 1150.0

< –200.0 < –2000 < F830_H < –328.0 < –3280 <F330_H < 73.2 < 732 <02DC_H Underflow In the case of incorrect wiring (e.g. polarity reversal or open inputs) or of a sensor error in the negative

range (e.g. incorrect thermocouple type), the analog input module signals underflow below ...

... F380_H and outputs 8000_H. ... EAC0_H and outputs 8000_H. ... FE2C_H and outputs 8000_H.

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Analog value representation for Thermocouple temperature detectors type N

Table 4-26 Analog Value Representation for Thermocouple Temperature Detectors Type N

Units Units Units

Type N

in C dec. hex. Type N

in F dec. hex. Type N

in K dec. hex. Range

> 1550.0 32767 7FFF_H > 2822.0 32767 7FFF_H > 1823.2 32767 7FFF_H Overflow 1550.0 In the case of incorrect wiring (e.g. polarity reversal or open inputs) or of a sensor error in the negative

range (e.g. incorrect thermocouple type), the analog input module signals underflow below ...

... F0C4_H and outputs 8000_H. ... E5D4_H and outputs 8000_H. ... FB70_H and outputs 8000_H.

Analog value representation for Thermocouple temperature detectors type R, S

Table 4-27 Analog Value Representation for Thermocouple Temperature Detectors Type R, S

Units Units Units

> 2019.0 32767 7FFF_H > 3276.6 32767 7FFF_H > 2292.2 32767 7FFF_H Overflow 2019.0

< –170.0 –32768 8000_H < –274.0 –32768 8000_H < 103-2 < 1032 8000_H Underflow

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Analog value representation for Thermocouple temperature detectors type T

Table 4-28 Analog Value Representation for Thermocouple Temperature Detectors Type T

Units Units Units

Type T

in C dec. hex. Type T

in F dec. hex. Type T

in K dec. hex. Range

> 540.0 32767 7FFF_H > 1004.0 32767 7FFF_H > 813.2 32767 7FFF_H Overflow 540.0

1004.0 10040 2738_H 813.2 8132 1FC4_H

Overrange

< –270.0 < –2700 <F574_H < –454.0 < –4540 <EE44_H < 3.2 < 32 < 0020_H Underflow In the case of incorrect wiring (e.g. polarity reversal or open inputs) or of a sensor error in the negative

range (e.g. incorrect thermocouple type), the analog input module signals underflow below ...

... F0C4_H and outputs 8000_H. ... E5D4_H and outputs 8000_H. ... FB70_H and outputs 8000_H.

Analog value representation for Thermocouple temperature detectors type U

Table 4-29 Analog Value Representation for Thermocouple Temperature Detectors Type U

Units Units Units

> 850.0 32767 7FFF_H > 1562.0 32767 7FFF_H > 1123.2 32767 7FFF_H Overflow 850.0

< –200.0 < –2000 <F830_H < –328.0 < –3280 <F330_H < 73.2 < 732 <02DC_H Underflow In the case of incorrect wiring (e.g. polarity reversal or open inputs) or of a sensor error in the negative

range (e.g. incorrect thermocouple type), the analog input module signals underflow below ...

... F380_H and outputs 8000_H. ... EAC0_H and outputs 8000_H. ... FE2C_H and outputs 8000_H.

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