Abstract: To provide a drive system provided with a plurality of control units configured to control electric motors, in which a wiring line is further simplified, the wiring line allowing a signal related to stopping of the electric motor to be input to the drive system. The drive system includes a plurality of control units each controlling a corresponding electric motor according to a command supplied from a host device via a first wiring line, a management unit including an input port that receives input of a first signal related to stopping of the electric motor, and a second wiring line that connects the management unit to the plurality of control units and is different from the first wiring line. The management unit distributes the first signal input to the input port to each of the plurality of control units via the second wiring line.

Abstract: A main control section (30) of a slave device (3) include a slave controller (31), a processor (32), and a watchdog circuit (33) which are configured as a one-chip integrated circuit. In a case where the watchdog circuit (33) has detected that a malfunction has occurred in an operation of the main control section (30), the watchdog circuit (33) resets the processor (32) while not stopping an operation of the slave controller (31).

Abstract: An aspect of the present invention provides a digital noise filter capable of reducing jitter. A digital noise filter (11) which receives, as an input signal, an OFF signal or an ON signal, and removes noise from the input signal, includes: a sampling processing section (11a) configured to carry out sampling of the input signal at a predetermined cycle; and a noise processing section (11b) configured to set the ON signal or the OFF signal as a signal to be outputted, on the basis of a proportion of the ON signal in the sampling which is consecutively carried out a predetermined number of times.

Abstract: A main control section (30) of a slave device (3) include a slave controller (31), a processor (32), and a watchdog circuit (33) which are configured as a one-chip integrated circuit. In a case where the watchdog circuit (33) has detected that a malfunction has occurred in an operation of the main control section (30), the watchdog circuit (33) resets the processor (32) while not stopping an operation of the slave controller (31).

Abstract: A slave device is realized that establishes a link with a master device or another slave device such that a large link delay hardly occurs. The slave device includes a PHY unit, a COM unit, and a MPU unit. The PHY unit starts an operation according to the specification of the AutoMDI/MDI-X function when the slave device is turned on or the PHY unit itself is reset. After a predetermined time period has elapsed, the MPU unit resets the COM unit, and the PHY unit is reset in response to the reset of the COM unit.

Abstract: On a circuit board configured to transmit a signal, a pulse transformer is provided on a path used for transmitting the signal of the circuit board. A shield member is provided on the circuit board to prevent noise, which is generated due to noise current flowing in a noise line pattern, from entering the pulse transformer. The shield member covers a part of a surface of at least one pulse transformer, the part intersecting concentric circles (which represent a magnetic field generated by the noise current) whose central axis extends along the direction in which the noise current flows.

Abstract: A slave device is realized that establishes a link with a master device or another slave device such that a large link delay hardly occurs. The slave device includes a PHY unit, a COM unit, and a MPU unit. The PHY unit starts an operation according to the specification of the AutoMDI/MDI-X function when the slave device is turned on or the PHY unit itself is reset. After a predetermined time period has elapsed, the MPU unit resets the COM unit, and the PHY unit is reset in response to the reset of the COM unit.

Abstract: On a circuit board configured to transmit a signal, a pulse transformer is provided on a path used for transmitting the signal of the circuit board. A shield member is provided on the circuit board to prevent noise, which is generated due to noise current flowing in a noise line pattern, from entering the pulse transformer. The shield member covers a part of a surface of at least one pulse transformer, the part intersecting concentric circles (which represent a magnetic field generated by the noise current) whose central axis extends along the direction in which the noise current flows.