Abstract: A positioner operating mode identifying function is provided in a calculating unit. A pressure value of an amplified pneumatic pressure signal, from a single-mode pilot relay, is detected by a pressure sensor and sent to the calculating unit. The calculating unit, through the positioner operating mode identifying function, monitors a change in the amplified pneumatic pressure signal corresponding to a change in the control signal, and if the direction of change in the control output and the direction of change of the amplified pneumatic pressure signal are the identical direction, identifies the operating mode of the positioner as the positive operating mode. The operating mode of the positioner is identified as the negative operating mode if the direction of change in the control output and the direction of change of the amplified pneumatic pressure signal are the opposite directions. The identification results displayed on a screen of a display unit.

Abstract: An operating mode of an electro-pneumatic converting unit is stored in advance in an electro-pneumatic converting unit operating mode storing unit. A blockage location identifying function is provided in a calculating unit. The operating unit monitors the magnitude of shift and the direction of shift of the control output, relative to the nozzle back pressure, through the blockage location identifying function, and identifies whether a blockage has occurred in the fixed orifice or the nozzle/flapper mechanism based on the magnitude of shift and direction of shift of the control output, relative to the nozzle back pressure, and based on the operating mode of the electro-pneumatic converting unit, stored in the electro-pneumatic converting unit operating mode storing unit.

Abstract: Two controlling devices, namely a combustion controlling device controlling the combustion of a combustion furnace, and a safety controlling device checking the operation of the devices wherein the operations are controlled by the combustion controlling device. This enables safer control of combustion because if there is a fault in either the combustion controlling device or the safety controlling device, a process can be performed by the other device to stop the combustion. Additionally, because the controlling device for controlling the structural elements that control the combustion in the boiler system and the controlling device for operational checks of the outputs from those structural elements are separate, if there is a failure in any of the structural elements or controlling devices, that failure can be detected reliably, enabling safer control of the combustion.

Abstract: Power that is supplied to a primary coil of a transformer from a DC power supply that is connected to the primary coil is modulated based on continuous pulses supplied from a microcontroller, and power that is induced between terminals of a secondary coil of the transformer is supplied to a relay. A large driving current can be supplied to the relay thereby, thus making it possible to reduce the ripple component, and, as a result, to achieve stabilized operation.

Abstract: A flame sensor is provided with a focusing member. Ultraviolet light emitted from a tight source is reflected by an inner surface of the focusing member to be focused on an electrode of an electrode pair, to increase the sensitivity.

Abstract: With the non-magnetic-excitation period until a specific amount of time elapses from the commencement of the transition from the positive magnetic excitation period to the non-magnetic-excitation period defined as a first period T1 and the non-magnetic-excitation period until a specific amount of time elapses from the commencement of the transition from the negative magnetic excitation period to the non-magnetic-excitation period defined as a second period T2, the sum of a voltage produced at a detecting electrode and a voltage produced at a detecting electrode, at the time of each first period T1 and second period T2, is calculated as a sum of voltages between electrodes, and a fault in an electromagnetic flow meter, such as detection of an empty state, adhesion of an electrically insulating object to an electrode, and so forth, is evaluated based on the sum of voltages between electrodes.

Abstract: A moisture exchange status monitoring device is provided. The moisture exchange status monitoring device is provided with: a temperature difference detecting portion; an evaluating portion; a setting value storing portion; and an evaluation result outputting portion. The temperature difference detecting portion detects a temperature difference ?t in the air on the treating side before and after passing through a desiccant rotor. The evaluating portion receives the temperature difference ?t from the temperature difference detecting portion and compares the temperature difference ?t to a setting value ?tth that is stored in the setting value storing portion, to evaluate the status of moisture adsorption of the moisture from the air on the treating side of the desiccant rotor. The evaluation result outputting portion outputs the evaluation result for the status of moisture adsorption, from the evaluating portion, as the monitoring result for the status of exchange of the moisture of the desiccant rotor.

Abstract: First through third relays are connected in series, and a load 4 does not operate unless all are in the ON state. This enables the prevention of failures such as spilling of fuel due to a malfunction of the load, even when there is a fault in any of the first through third relays.

Abstract: A positioner operating mode identifying function and an use parameter selecting function are provided in a calculating unit. A positive operating parameter and a negative operating parameter are stored in a storing portion. The positioner operating mode identifying function identifies the operating mode of a positioner or from the direction of change of a control output and the direction of change of an amplified pneumatic pressure signal Pout, and the identification result is set automatically as the current operating mode of the positioner. In accordance with the current operating mode identified for the positioner, the use parameter selecting function selects, as the use parameter from the storing portion, the positive operating parameter if the positive operating mode, and the negative operating parameter if the negative operating mode, and sets the selected use parameter automatically.

Abstract: Forecasting the end of the service life of a relay more accurately due to the effects of the load conditions and the environmental conditions can occur through diagnosing the end of service life of the relay based on the time, until the point in time that the actual opening or closing of the relay is detected, from the point in time of the application of the power to the relay or the point in time of the end of application of power to the relay coil by the controlling portion. Forecasting the end of the service life of the relay based on time, increases accuracy because time is a value that is not affected by the external environment. Additionally, because the end of the service life is forecasted based on the actual opening/closing of the relay, not only is it possible to detect immediately a fault in the relay, but it is also possible to eliminate the effects due to individual differences.

Abstract: Two temperature controllers, a first temperature controller and a second temperature controller are provided, and combustion in the furnace is controlled based on a first signal and a second signal outputted therefrom. Doing so enables safe control of the furnace even when a failure occurs in one of the temperature controllers.

Abstract: An RTC, having a crystal oscillator of different characteristics from those of a crystal oscillator, is provided, and the pulse period of the pulse signal from the RTC and the pulse signal based on the crystal oscillator are compared to detect a fault in the crystal oscillator. As a result, even if, for example, located in a high temperature environment, the degrees to the decrease in frequency will be different, thus making it possible to detect reliably a fault in the crystal oscillator.

Abstract: A physical quantity sensor includes: a semiconductor laser which emits laser light to a measurement target; an oscillation wavelength modulating device that operates the semiconductor laser such that at least one of a first oscillation period and a second oscillation period alternately exists; a detector that detects an electrical signal including interference waveforms, the interference waveforms being caused by a self-coupling effect of the laser light and return light from the measurement target; a signal extracting device that measures each cycle of the interference waveforms whenever the interference waveform is input; a cycle correcting device that compares each cycle of the interference waveforms with a reference cycle to correct the cycles of the interference waveforms; and a calculating device that calculates at least one of displacement and velocity of the measurement target based on each of the cycles of the interference waveforms corrected by the cycle correcting device.

Abstract: For example, a regulator valve may be controlled from the outside through a positioner, or may be controlled autonomously by an adjusting mechanism in the valve. The result of the control is a change in the dislocation of the valve stem (movable portion). Additionally, there will be a change in a process change magnitude, such as the magnitude of flow of a fluid that passes through the regulator valve, in accordance with the magnitude of dislocation of the valve stem. In this way, the diagnosing operation controlling portion controls the operation of the diagnosing portion based on the magnitude of dislocation of the valve stem or on the magnitude of change of the measurement results (the measurement value) of a process change magnitude.

Abstract: A register circuit having a plurality of registers enabling the writing and reading of data by the specification of an address; a register controlling circuit monitoring data of a plurality of registers of the register circuit through the specification of an address, and writing, to a register pre-established in the register circuit, for activating devices; and a signal transmitting circuit causing a device to execute a specific operation, based on a specified address and on data read from the register circuit are provided; and not only is a collection of first bits for controlling jointly the individual operations of the plurality of devices assigned in a first register that is established in advance in the plurality of registers, but also second bits for controlling individually the individual operations in the plurality of devices are assigned respectively in a plurality of respective second registers that differ from the first register.

Abstract: Equipment information including an installation height, which is an elevation, is stored as equipment information in an equipment management DB as location information for the location wherein an applicable piece of equipment is installed, and in a terminal device, the equipment information for the applicable equipment is acquired from the equipment management DB by a location information displaying unit in response to a display request operation, and a differential height, acquired through subtracting the current height, detected by a height detecting unit, from the installation height of the equipment, included in the equipment information that was acquired, is displayed on the screen of a screen displaying unit.

Abstract: A control model calculating portion for calculating a control model using analysis data, a control model updating portion for updating by accepting the control model, and a data suitability evaluating portion for evaluating the suitability of analysis data are provided. The data suitability evaluating portion comprises a function characteristic prior knowledge storing portion for storing prior knowledge regarding a characteristic obtained in advance regarding the subject of control, a quadratic polynomial calculating portion for calculating a quadratic polynomial wherein the analysis data is approximated by a quadratic function, and a characteristic evaluating portion for comparing a characteristic of the quadratic polynomial, calculated by the quadratic polynomial calculating portion, to prior knowledge stored in the function characteristic prior knowledge storing portion. The control model updating portion updates the control model if the two match in the comparison.

Abstract: An interface of the present invention includes a first inverter circuit that inverts a logic level of an input signal given to an external input terminal and outputs the inverted logic level, a second inverter circuit that outputs a potential in which a logic level of an output signal of the first inverter circuit is inverted, that is, a potential higher or lower than a logic of an input signal applied to the first inverter circuit by the amount of a predetermined potential, and a feedback path that positive feedbacks an output signal of the second inverter circuit to the external input terminal. The interface circuit of the invention positive-feedbacks a potential of the output signal of the second inverter circuit and shifts the potential of the external input terminal in a floating state to an H or L level potential.

Abstract: The calculating device has first and second Fourier transform portions performing Fourier transforms on two respective inputted signals; a complex conjugate deriving portion deriving a complex conjugate of a value outputted from the first Fourier transform portion; a multiplier multiplying the complex conjugate with the value outputted from the second Fourier transform portion, and outputting the value after the multiplication; a Hilbert transform portion performing a Hilbert transform on the value after multiplication; first and second inverse Fourier transform portions performing respective inverse Fourier transforms on the value after multiplication and the value outputted from the Hilbert transform portion; a phase relationship deriving portion deriving a phase relationship between the two inputted signals based on the values outputted from the first and second inverse Fourier transform portions; and a time difference deriving portion deriving a time difference between the two inputted signals based on th

Abstract: An electric actuator is provided having the same configuration whether used as an ordinary electric actuator or as an electric actuator having an emergency shutoff function. A power failure detection circuit, a portion for supplying power during a power failure, a motor power supply switching circuit, a power failure control signal generation circuit, and a control signal switching circuit are provided in a module detachably coupled to the electric actuator. When failure of the primary power is not detected, the motor power supply switching circuit and the control signal switching circuit send the primary power and a signal indicative of a setting of an aperture of a valve of the electric actuator, respectively, to the electric actuator. When failure of the primary power is detected, the motor power supply switching circuit and the control signal switching circuit send the secondary power and the signal indicative of the setting of the aperture during a power failure to the electric actuator.