Actual value sensor configuration

Actual value sensor

The actual value sensor provides:

 

Possible signal types when selecting the analogue input as actual value input:

Actual value sensor signal types:

0 – 10 V: voltage range of 0 to 10 V for transfer of measurement values.

2 – 10 V: voltage range of 2 to 10 V for the transfer of measurement values. Cable break is detected for a voltage below 2 V.

0 – 20 mA: electric current range of 0 to 20 mA for transfer of measured values.

4 – 20 mA: electric current range of 4 to 20 mA for transfer of measured values. A cable break is detected in case of electric current below 4 mA.

PT1000: The analogue input evaluates a PT1000 temperature sensor.

 

Actual value sensor configuration

NOTICE

notice

The selection of the analogue input as a connection for a sensor requires the corresponding configuration of the analogue input.

First open the overview menu to view the current configuration and use of analogue input.

To do this, in the “Settings” menu , select

  1. “External interfaces”
  2. “Function analogue input AI1” or “Function analogue input AI2”
  3. “Overview of the analogue input”.

Type of use, signal type and other set values for selected analogue input will be displayed. In order to make or change settings:

In the “Settings” menu , select

  1. “External interfaces”
  2. “Function analogue input AI1” or “Function analogue input AI2”
  3. “Set analogue input”.

First select type of use:

Settings dialogue actual value sensor

Select one of the types of use “Differential pressure sensor”, “Temperature sensor” or “External sensor” as one of the usage types.

NOTICE

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If another usage type has been set to “Not configured” in the “Select type of use” menu, check whether the analogue input is already used for another type of use.
If necessary, select a different source.

Select the “Signal type” after selecting the actual value sensor:

Signal type

When selecting the signal type “PT1000”, all settings for the sensor input are completed and all other signal types require additional settings.

For the transfer of analogue signal values to actual values, only the transfer ramp is now defined. For this purpose, the minimum and maximum support point of the characteristic curve is specified and the respective actual values are amended (MIN signal/value assignment and MAX signal/value assignment).

NOTICE

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If the analogue input has been configured to the signal type PT1000 for a temperature sensor, a “temperature correction value” can be set to compensate for the electrical resistance if the sensor cable is longer than 3 m.
The temperature correction value in Kelvin (K) can be set in the range of +/-15 K.

Minimum signal/value assignment, actual value sensor

The value for the minimum signal describes the lower signal value of the transmission ramp with an associated value of 0 %. This is the equivalent of 0.0 mA for -10 °C in this example.

Maximum signal/value assignment, actual value sensor

Data input is complete once the minimum and maximum characteristic curve support points have been entered.

The value for the maximum signal describes the upper signal value of the transmission ramp with an associated value of 100 %. This is the equivalent of 20.0 mA for 120 °C in this example

NOTICE

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If the signal type PT1000 was selected, it is possible to set a temperature correction value for the measured temperature. With this the electrical resistance of a long sensor cable can be compensated.
The temperature correction value in Kelvin (K) can be set in the range of +/-15° K.

In the “Settings” menu , select

  1. “External interfaces”
  2. “Function analogue input AI1” or “Function analogue input AI2”
  3. “Temperature correction” and set correction value (offset).

NOTICE

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Optionally specify the position of the sensor for better understanding of the connected sensor’s function.
This configured position does not influence the function or sensor use.

In the “Settings” menu , select

  1. “External interfaces”
  2. “Function analogue input AI1” or “Function analogue input AI2”
  3. “Select the sensor position”.

The following positions are available: