Abstract: An I/O module includes a base plate, a plurality of universal circuits, and an option module. The base plate includes a plurality of connection terminals. A plurality of field devices is electrically connectable to the connection terminals. The universal circuits correspond to the connection terminals. The universal circuits are provided on the base plate, and configured to perform an input of analog signals from the field device, an output of analog signals to the field device, an input of discrete signals from the field device, and an output of discrete signals to the field device. The option module is detachably provided in the base plate. The option module is provided between a first connection terminal of the connection terminals and a first universal circuit of the universal circuits. The option module includes a first circuit configured to performing transmitting and receiving of signals between the first connection terminal and the first universal circuit.

Abstract: A data processing apparatus includes an acquisition circuit that acquires time-series data comprising a plurality of values observed in a plurality of channels at a plurality of points in time; a change trend calculation circuit that calculates a change trend of the observed values at each of the points in time on a channel-by-channel basis; a memory that stores a plurality of judgment tables each indicating a change trend of previous values at each of the points in time within a predetermined time period up to the current point in time; a comparison circuit that compares change trend data comprising a set of change trends of the observed values for each of the channels within the predetermined time period with the judgment tables; and a notification output circuit that outputs a notification related to a temporal change in the observed values on the basis of a result of the comparison.

Abstract: A process control system includes: one or a plurality of field devices configured to be placed in a plant; and a control apparatus configured to perform at least one of input and output on the field device to control the plant; and a change trend calculation device configured to calculate a change trend in time-series data including an observed value at each point in time of the field device.

Abstract: A display apparatus includes: an operation input device configured to designate a data range of an observed value; an analysis condition setting device configured to determine an analysis range or an analysis parameter of the observed value, corresponding to the number of samples included in the data range; a computation device configured to analyze a waveform or a trend of the observed value on the basis of the analysis range or analysis parameter; and a display screen generation device configured to cause a display device to display a waveform or a straight line as a computation result of the computation device.

Abstract: An I/O module includes a base plate, a plurality of universal circuits, and an option module. The base plate includes a plurality of connection terminals. A plurality of field devices is electrically connectable to the connection terminals. The universal circuits correspond to the connection terminals. The universal circuits are provided on the base plate, and configured to perform an input of analog signals from the field device, an output of analog signals to the field device, an input of discrete signals from the field device, and an output of discrete signals to the field device. The option module is detachably provided in the base plate. The option module is provided between a first connection terminal of the connection terminals and a first universal circuit of the universal circuits. The option module includes a first circuit configured to performing transmitting and receiving of signals between the first connection terminal and the first universal circuit.

Abstract: A plant simulation device includes a first storage that stores a model that models a state of a facility in a plant, a first parameter that is fixed at a start operation of the plant, and a second parameter that is varied during an operation of the plant, the first parameter and the second parameter being set in the model, and a simulator that compares a process value of the facility with a simulated value calculated using the model and that adjusts the first parameter and the second parameter.

Abstract: A processing device according to one aspect of the present invention includes a provider configured to provide a process to a first device connected to a network of a process control system in a plant, an acquirer configured to acquire a live list generated by the first device based on diagnostic communication packets transmitted from the first device at predetermined time intervals, the live list comprising information indicating whether communication between the first device and another processing device that provides a process to the first device is norma, the processing device and the another processing device constituting a redundant pair 1, and a switch configured to switch a state of the provider from a standby state in which the provider is on standby to provide the process to the first device to an active state in which the provider provides the process to the first device based on the acquired live list.

Abstract: A plant state displaying apparatus displaying information representing a state of a plant includes a generator that: acquires plant information from at least one of devices, apparatuses, and facilities installed in the plant; calculates a state value representing the state of the plant using the plant information; and generates a plant state diagram in which at least one of a color and a density of at least one of devices, apparatuses, and facilities from which the plant information is acquired is changed according to magnitude of the state value; and a display that displays the plant state diagram generated by the generator as the information representing the state of the plant.

Abstract: A maintenance support system include includes: a first storage unit which stores first specification information indicating a specification of a process control system which performs control of an industrial process implemented in a plant; an actual condition information extraction unit configured to extract actual condition information indicating an actual condition for the process control system; and a first comparison unit configured to output first information indicating a result of comparing the first specification information stored in the first storage unit with the actual condition information extracted by the extraction unit.

Abstract: A service providing device included in a process control system in a plant, the service providing device includes a communicator configured to perform communication via a network, a service provider configured to provides a service via the communicator by exclusively assigning first identification information to one of the service providing device and an alternative service providing device, the first identification information being common to the alternative service providing device which provides the service instead of the service providing device, and a heartbeat transmitter configured to transmit heartbeat information for notifying that the service is normal to the alternative service providing device via a relaying device by using second identification information which is different from the first identification information.

Abstract: A redundancy device which is configured to communicate with a redundancy opposite device and perform a redundancy execution, the redundancy device includes receivers configured to receive individually HB signals transmitted from the redundancy opposite device, a calculator configured to calculate a number of normal communication paths among communication paths of the HB signals based on a reception result of the receivers, a comparator configured to compare a calculation result of the calculator with a predetermined threshold value, and a changer configured to change the redundancy device from a standby state to an operating state, or change the redundancy device from the standby state to a not-standby state in which the redundancy execution is released, based on the calculation result of the calculator and a comparison result of the comparator.

Abstract: A plant performance evaluation apparatus includes a first storage storing a first static model indicating a model of a first steady state in a plant, a second storage storing a first dynamic model indicating a model of a dynamic state of the plant, a model converter configured to convert the first dynamic model to a second static model indicating a model of a second steady state of the plant, and to store the second static model into the first storage, the first steady state indicating a steady state of the plant temporally before the second steady state, a comparator configured to compare parameters included in the first static model with parameters included in the second static model and to output a comparison result, and a display configured to display the comparison result output from the comparator.

Abstract: An input-output apparatus which is used in a process control system is provided. The input-output apparatus includes a first interface to which a lower-level apparatus is connected; a second interface to which a higher-level apparatus is connected; a third interface to which an external setting apparatus is connected; a switcher which switches between a connection of the second interface to the first interface and a connection of the third interface to the first interface; and a control device which, when in a first state in which the second interface is connected to the first interface by the switcher and the connection of the third interface to the first interface is permitted, controls the switcher to cause transitioning to a second state in which the third interface and the first interface are connected when a connection request to the first interface is input through the third interface.

Abstract: Provided is an I/O module including: a first interface including connectors each of which is connected to a field device; a second interface connected to a controller that controls the field device; a third interface connected to an external setting device that outputs a setting instruction; and a setting adjustor configured to set tag information, which identifies each of the connectors, to each of the connectors based on the setting instruction input from the setting device via the third interface.

Abstract: An I/O module includes a base plate, a plurality of universal-circuits, and an option-module. The base plate includes a plurality of connection terminals. A plurality of field devices is electrically connectable to the connection terminals. The universal-circuits correspond to the connection terminals. The universal-circuits are provided on the base plate, and configured to perform an input of analog signals from the field device, an output of analog signals to the field device, an input of discrete signals from the field device, and an output of discrete signals to the field device. The option-module is detachably provided in the base plate. The option-module is provided between a first connection terminal of the connection terminals and a first universal-circuit of the universal-circuits. The option-module includes a first circuit configured to performing transmitting and receiving of signals between the first connection terminal and the first universal-circuit.

Abstract: A maintenance support system include includes: a first storage unit which stores first specification information indicating a specification of a process control system which performs control of an industrial process implemented in a plant; an actual condition information extraction unit configured to extract actual condition information indicating an actual condition for the process control system; and a first comparison unit configured to output first information indicating a result of comparing the first specification information stored in the first storage unit with the actual condition information extracted by the extraction unit.

Abstract: A swept-wavelength loss measuring system is provided with an arrangement including a tunable laser source that outputs light to a DUT with the wavelength being continuously varied, and outputs measuring trigger signals at arbitrary intervals, at least one optical power meter for measuring an intensity of light transmitted through the DUT in response to reception of each of the measuring trigger signals, a wavelength measuring unit for measuring a wavelength of the outputted light from the tunable laser source in response to reception of each of the measuring trigger signals, and an arithmetic operation unit carrying out an arithmetic operation of the outputs from the optical power meter and the wavelength measuring unit to output a light intensity value relative to each wavelength. The arrangement assures accuracy of the measured wavelength.

Abstract: An optical coupler 13, a reflection attenuation amount measurement photodetector 14, and an APC photodetector 15 are provided in a variable-wavelength light source apparatus 1 and the reflection attenuation amount can be measured simply by connecting a device under test without using any external optical power meter, etc, and when wavelength calibration is executed, an external wavelength calibration gas cell 18 and a total reflection termination 20 are connected, whereby the wavelength of an optical signal output from a variable-wavelength light source 11 can be measured and controlled with higher accuracy.

Abstract: A variable-wavelength light source unit for sending output light of an arbitrary wavelength selected in a variable-wavelength light source section 1 has an optical variable attenuator 2 placed on the output side of the variable-wavelength light source section and a control circuit 4 for controlling the attenuation amount of the optical variable attenuator in response to light output provided by splitting a part of the output light.

Abstract: In a tunable laser source device for branching a light output from a tunable laser source portion 1 to supply to a wavelength measuring device 6 and a wavelength calibrating reference device 5 and then controlling the tunable laser source portion in response to an output of the wavelength measuring device, at least one peak and one notch or two peaks or two notches or more in a measurement interference period of the wavelength measuring device are included between a plurality of reference wavelengths of the wavelength calibrating reference device.