A control circuit includes a latching relay, a power loss activation circuit, and a watchdog circuit. A microcontrol unit (MCU) communicates with the watchdog circuit in a normal operation of the control circuit. As an action of a failsafe precaution in the event of a main power loss or a component failure, the MCU stops communicating with the watchdog circuit, at which point the watchdog circuit instructs the power loss activation circuit to continue operation of the control circuit. The control circuit further operates to implement mitigation operations in the event of a main power loss or component failure.

In accordance with one embodiment, a fan controller operates in a standard mode when main power is provided to the power supply unit in which speed of the fan is controlled in response to a primary pulse width modulation (PWM) signal from a power controller. A loss of the main power to the power supply unit may be detected at a logic circuit, which provides a secondary PWM signal to the fan controller in response to the loss of the main power. In certain embodiments, the fan controller is operated in a power loss mode in response to the secondary PWM signal to direct the speed of the fan to a low-power consumption target speed.

An object is to realize a technology in which a more appropriate power failure operation can be performed when the configuration of a servo system is selected. A selection device 20 includes: a servo system selection unit 21b which selects a servo amplifier corresponding to the specification of a motor and a drive condition of the motor in a servo system; a UI display control unit 21a which receives the setting of a condition on a power failure operation in the servo amplifier selected by the servo amplifier selection unit; and a power failure operation determination unit 21d which determines, based on the condition on the power failure operation received in the power failure operation condition setting unit, a method for the power failure operation in the selected servo amplifier, and the UI display control unit 21a outputs the method for the power failure operation which is determined by the power failure operation determination unit.

An air conditioner includes a main control unit, and a motor-driving control unit. The main control unit transmits, at every first time, an instruction for rotating the motor to the motor-driving control unit. The motor-driving control unit outputs, on the basis of the instruction, an instruction for rotating the motor to the inverter output unit. When the motor-driving control unit does not receive a new instruction for rotating the motor from the main control unit before the first time elapses from a time when the motor-driving control unit receives the instruction for rotating the motor from the main control unit last, the motor-driving control unit outputs an instruction for continuing operation based on the instruction for rotating the motor received from the main control unit at an immediately preceding time to the inverter output unit.

This system is a data collection system collecting a robot operation-related data/signal from a robot controller. The data collection system includes a data collection condition setting unit setting a collection condition of the robot operation-related data/signal from the robot controller and a data storage unit storing the robot operation-related data/signal collected from the robot controller. A shared memory inside which the data storage unit and the data collection condition setting unit are formed is formed in a substrate which can be mounted on an expansion slot of the robot controller. According to this system, a data collection function can be post-installed to an existing robot controller so as to arbitrarily select and collect various data on the robot operation.

A control device configured to control an industrial machine, the control device having: a plurality of memories including a first memory configured to hold data when a power supply is off and a second memory configured to inhibit data from being held when the power supply is off; and circuitry configured to: set, in each of a plurality of data units, an attribute indicating whether the data unit is to be held when the power supply is off; and set an address of each data unit such that each data unit is stored in one of the plurality of memories corresponding to the attribute.

In accordance with one embodiment, a fan controller operates in a standard mode when main power is provided to the power supply unit in which speed of the fan is controlled in response to a primary pulse width modulation (PWM) signal from a power controller. A loss of the main power to the power supply unit may be detected at a logic circuit, which provides a secondary PWM signal to the fan controller in response to the loss of the main power. In certain embodiments, the fan controller is operated in a power loss mode in response to the secondary PWM signal to direct the speed of the fan to a low-power consumption target speed.

An object is to realize a technology in which a more appropriate power failure operation can be performed when the configuration of a servo system is selected. A selection device 20 includes: a servo system selection unit 21b which selects a servo amplifier corresponding to the specification of a motor and a drive condition of the motor in a servo system; a UI display control unit 21a which receives the setting of a condition on a power failure operation in the servo amplifier selected by the servo amplifier selection unit; and a power failure operation determination unit 21d which determines, based on the condition on the power failure operation received in the power failure operation condition setting unit, a method for the power failure operation in the selected servo amplifier, and the UI display control unit 21a outputs the method for the power failure operation which is determined by the power failure operation determination unit.

An air conditioner includes a main control unit, and a motor-driving control unit. The main control unit transmits, at every first time, an instruction for rotating the motor to the motor-driving control unit. The motor-driving control unit outputs, on the basis of the instruction, an instruction for rotating the motor to the inverter output unit. When the motor-driving control unit does not receive a new instruction for rotating the motor from the main control unit before the first time elapses from a time when the motor-driving control unit receives the instruction for rotating the motor from the main control unit last, the motor-driving control unit outputs an instruction for continuing operation based on the instruction for rotating the motor received from the main control unit at an immediately preceding time to the inverter output unit.

A laser processing system including a laser processing unit, a controller controlling the processing unit according to a laser processing program, and a restart preparation apparatus performing a preparation process of the controller to resume the program execution after being suspended. The restart preparation apparatus includes an operating state judging section judging whether an operating state of the processing unit when suspending the program execution is in course of laser processing, and a restart condition specifying section specifying a restart condition of the processing unit when resuming the program execution, from among predetermined conditions, based on a judgment result. The operating state judging section judges that the operating state is in course of laser processing, if a predetermined operation command for processing the workpiece is output from the controller, or predetermined external information for processing the workpiece is input to the controller, at the instant of suspending the program execution.