A control device includes a controller that executes a control arithmetic calculation controlling a control target; a communication device that executes processing for secure communication using a certificate; a detector that detects that an end of the certificate approaches; and a notification device that notifies that the end of the certificate approaches.

A master device manages a plurality of slave devices constituting a network including a ring topology. The plurality of slave devices includes: a first slave device serving as a starting point and a terminal point of the ring topology; and a plurality of second slave devices connected between a first output port of the first slave device and a second output port thereof and constituting the ring topology. On the basis of a network configuration detected when the second output port and the output port of a second slave device paired with the second output port are available and of a network configuration detected when the second output port and the output port paired therewith have been made unavailable, the master device determines an incorrect wiring path between the first output port and the second output port and outputs information indicating the incorrect wiring path to an information processing device.

A programmable display device includes: an obtaining section for obtaining data; a setting accepting section for accepting, via a setting screen displayed in response to predetermined operation, a process setting for a content of a process to be executed for the data and information for executing the process; and a process executing section for executing the process in accordance with the process setting, the setting accepting section accepting the process setting in a state where the obtaining section is executing the obtaining of the data.

According to the disclosure, a position of a main control valve and a position of an auxiliary control valve are adjusted. In particular, a position of the auxiliary control valve is adjusted by determining whether a change in the position of the main control valve is in a preset deadband range, thereby preventing a periodic water level fluctuation of a steam generator.

According to the disclosure, a position of a main control valve and a position of an auxiliary control valve are adjusted. In particular, a position of the auxiliary control valve is adjusted by determining whether a change in the position of the main control valve is in a preset deadband range, thereby preventing a periodic water level fluctuation of a steam generator.

A control system includes a first control device and a second control device. The first control device can control a control target. The first control device includes a first control unit, a first communication unit, a first monitoring unit, and a first determination unit. The first control unit can control the control target. The first communication unit can communicate with the control target. The first monitoring unit monitors communication between the second control device and the control target. The first determination unit determines execution or standby of control of the control target by the first control unit on the basis of a monitoring result of the first monitoring unit. The second control device includes a second control unit and a second communication unit. The second control unit can control the control target. The second communication unit can communicate with the control target.

A management device according to an aspect of the present invention transmits and receives information to and from a relay device that is able to communicate with a field device installed in a plant. The management device includes a storage unit including a first setting storage area configured to store first setting information that is setting information of the relay device and a second setting storage area configured to store second setting information that is setting information of the field device and a first setting management unit that writes the first setting information and the second setting information to the relay device.

A management device according to an aspect of the present invention transmits and receives information to and from a relay device that is able to communicate with a field device installed in a plant. The management device includes a storage unit including a first setting storage area configured to store first setting information that is setting information of the relay device and a second setting storage area configured to store second setting information that is setting information of the field device and a first setting management unit that writes the first setting information and the second setting information to the relay device.

The junction device includes a first error detection means that detects a transmission error by monitoring the periodic reception of a first communication frame, and a state switching means that switches, when a transmission error is detected by the first error detection means, a state of the junction device to either a first state in which the signal output from all of the functional units connected to the junction device is disabled or a second state in which the signal output from some of the functional units connected to the junction device is continuously updated based on the configuration of each functional unit connected to the junction device.

An ultrasonic device may include an electromechanical ultrasonic system defined by a predetermined resonant frequency, the electromechanical ultrasonic system including an ultrasonic transducer coupled to an ultrasonic blade. A method of controlling energy delivered to the ultrasonic device may include determining an impedance of the ultrasonic transducer during a transection process, analyzing the impedance of the ultrasonic transducer, profiling the ultrasonic blade based on the impedance, and adjusting a power delivered to the transducer during the transection process based on the profile of the blade. The method may further include pulsing, the power delivered to the ultrasonic transducer, determining changes in tissue characteristics of tissue located in an end effector, wherein the changes in tissue characteristics is determined between pulses, and adjusting power delivered to the ultrasonic transducer based on the tissue changes throughout the transection. An ultrasonic instrument may include components configured to effect the method.