Abstract: The present invention provides a communication device, an industrial machine, and a communication-quality-determining method. A communication device is provided with: a transmission unit for transmitting a serial signal; a first phase difference determination unit for determining a first phase difference which is a phase difference between a first reference clock signal having the same period as the 1-bit period of a serial transmission signal which is the serial signal transmitted from the transmission unit and an edge of the serial transmission signal transmitted from the transmission unit; and a determination unit for determining that there is an abnormality with the serial transmission signal transmitted from the transmission unit when the first phase difference exceeds a first phase difference threshold.

Abstract: Provided are a communication device, an industrial machine, and a communication method that contribute to accurate evaluation of communication quality. The present invention comprises: a reception unit that receives a serial signal; and a signal string acquisition unit that samples the serial signal at second periods that are shorter than a first period, which is a 1-bit period of the serial signal, thereby acquiring a signal string corresponding to 1 bit of the serial signal.

Abstract: In a communication system for performing serial communication between a transmitting device and a receiving device, the transmitting device transmits, to the receiving device, a first data signal including at least information on a transmission clock in one frame, and transmits, to the receiving device, a second data signal including at least information on the transmission clock in one frame, during a time period from transmission of the first data signal until transmission of the first data signal in the next transmission cycle. The receiving device receives the first data signal and the second data signal transmitted from the transmitting device.

Abstract: An encoder that receives, from a control device, a request signal for requesting position data and transmits a response signal including the position data to the control device by serial communication, at a predetermined communication cycle, includes: a response signal generating unit configured to generate a response signal including the position data and associated data associated with the position data; and a transmitting unit configured to transmit the generated response signal. The transmitting unit is configured to transmit the associated data prior to transmission of the position data when transmitting the response signal.

Abstract: In a communication system for performing serial communication between a transmitting device and a receiving device, the transmitting device transmits, to the receiving device, a first data signal including at least information on a transmission clock in one frame, and transmits, to the receiving device, a second data signal including at least information on the transmission clock in one frame, during a time period from transmission of the first data signal until transmission of the first data signal in the next transmission cycle. The receiving device receives the first data signal and the second data signal transmitted from the transmitting device.

Abstract: An encoder that receives, from a control device, a request signal for requesting position data and transmits a response signal including the position data to the control device by serial communication, at a predetermined communication cycle, includes: a response signal generating unit configured to generate a response signal including the position data and associated data associated with the position data; and a transmitting unit configured to transmit the generated response signal. The transmitting unit is configured to transmit the associated data prior to transmission of the position data when transmitting the response signal.

Abstract: An encoder signal processor comprises an analog signal adjustment circuit for adjusting, based on an adjusting signal, at least one of an offset and an amplitude of a sinusoidal analog signal with two phases having a 90-degree difference outputted in accordance with a travel of a target to be measured, a position detection circuit for calculating position data of a target to be measured based on a digital signal obtained through analog/digital conversion of an analog signal adjusted, a velocity change amount detection circuit for detecting a change amount of velocity per predetermined detection cycle from a velocity calculated based on position data outputted while a target to be measured is traveling at a constant velocity, and an adjusting signal generation circuit for generating an adjusting signal that minimizes the change amount of velocity detected and transmitting the adjusting signal to the analog signal adjustment circuit.

Abstract: An encoder signal processor comprises an analog signal adjustment circuit for adjusting, based on an adjusting signal, at least one of an offset and an amplitude of a sinusoidal analog signal with two phases having a 90-degree difference outputted in accordance with a travel of a target to be measured, a position detection circuit for calculating position data of a target to be measured based on a digital signal obtained through analog/digital conversion of an analog signal adjusted, a velocity change amount detection circuit for detecting a change amount of velocity per predetermined detection cycle from a velocity calculated based on position data outputted while a target to be measured is traveling at a constant velocity, and an adjusting signal generation circuit for generating an adjusting signal that minimizes the change amount of velocity detected and transmitting the adjusting signal to the analog signal adjustment circuit.