Abstract: A field device energy management unit for a field device with an energy store for temporarily storing energy for a load of the field device includes a first current path connected or connectable to the energy store on the input side and in which a first diode is arranged on the output side, at least one second current path connected or connectable to a voltage supply of the field device on the input side, and in which a second diode is arranged on the output side, where the first and the second diode are operable such that, when the energy consumption of the load is low, the first diode is connected in the reverse direction and the second diode is connected in the forward direction and, when the energy consumption of the load is high, the first diode is connected in the forward direction.

Abstract: A field device includes functional units and an energy supply, wherein the sum of consumed energy of all functional units is greater than the maximum energy suppliable to the field device from the energy supply, where priority is assignable to at least two functional units, a higher priority functional unit influences the energy consumption of a lower priority functional unit such that the total energy consumption from the energy supply by all functional units is not greater than the maximum energy suppliable to the field device from the energy supply, and a line to the energy supply thereof passes through the higher priority functional unit to influence the energy consumption of the lower priority functional unit, such that functional units can be flexibly retrofitted, upgraded, or replaced, and the complexity involved in adapting the energy management of the functional units can be kept low.

Abstract: A field device energy management unit for a field device with an energy store for temporarily storing energy for a load of the field device includes a first current path connected or connectable to the energy store on the input side and in which a first diode is arranged on the output side, at least one second current path connected or connectable to a voltage supply of the field device on the input side, and in which a second diode is arranged on the output side, where the first and the second diode are operable such that, when the energy consumption of the load is low, the first diode is connected in the reverse direction and the second diode is connected in the forward direction and, when the energy consumption of the load is high, the first diode is connected in the forward direction

Abstract: A field device and method for parameterizing a field device via a parameter, wherein to provide validation, a first checking characteristic is calculated by the field device based on the parameter and a device ID stored, where the first checking characteristic is transferred to an engineering system, the parameter to be validated and the device ID are additionally transferred to the engineering system and are output on a display, where to confirm correct parameterization, a user can input the read first checking characteristic at an operating unit of the engineering system, which first checking characteristic is then transferred back to the field device, where the received checking characteristic is compared with the calculated checking characteristic to validate the parameter such that external calculations of checking characteristics are advantageously unrequired and relation of the validation to the correct field device is ensured.

Abstract: A method for accurately acquiring multiple analog input signals that are converted using a plurality of A/D converters into corresponding digital single measured values. A first measurement averaging cycle having a predetermined total number of measuring intervals is predetermined by a higher-order control unit. First and second input signals are acquired by first and second A/D converters in a first and second number of measuring intervals, the second number being smaller than the first number. The first and second input signals are averaged to form first and second measured values, respectively. The first input signal is acquired by the second A/D converter in a third number of measuring intervals as at least one further single measured value.

Abstract: A method for securely acquiring multiple analog input signals that are converted using a plurality of A/D converters into corresponding digital single measured values. A first measurement averaging cycle having a predetermined total number of measuring intervals is predetermined by a higher-order control unit. First and second input signals are acquired by first and second A/D converters in a first and second number of measuring intervals, the second number being smaller than the first number. The first and second input signals are averaged to form first and second measured values, respectively. The first input signal is acquired by the second A/D converter in a third number of measuring intervals as at least one further single measured value.

Abstract: A measuring transducer for process instrumentation that comprises a sensor for sensing a physical or chemical variable, wherein the sensor includes at least one electrical element embedded in a substrate comprising semiconducting material and is electrically separated therefrom by a blocked PN junction during normal operation. In order to monitor the condition of the sensor, the PN junction is connected in the conducting direction in a test mode, and the electrical property of the PN junction, i.e., the forward voltage, is determined and used to monitor the sensor condition. Additionally, a temperature sensor mounted on the sensor can be monitored by determining, based on the dependence of the forward voltage on the temperature, a comparative value for the temperature sensed by the temperature sensor. If major differences occur, a conclusion can be reached that there is a failure of the sensor, and a corresponding error message can be output over a field bus.

Abstract: In a transducer, a sensor signal (2) is digitized and subsequently processed in an arithmetic-logic unit (7) into a setpoint value (A), which is finally converted into an analog output signal (I). The output signal (I) is detected, digitized and then supplied to the arithmetic-logic unit (7), which determines any deviation between the output signal (I) and the setpoint value (A). This makes it possible to determine and display the measuring error of the transducer in the conversion of the digital setpoint value (A) into the analog output signal (I) and, where necessary, to correct it in the arithmetic-logic unit (7).