An analysis system includes detectors provided in an apparatus, first analysis devices each configured to generate processed data by performing predetermined processing on detection information from each of the detectors, and to evaluate an object to be evaluated based on the detection information from each of the detectors and on an evaluation pattern, and a second analysis device configured to update the evaluation pattern based on the processed data generated by each of the first analysis devices.

A tandem control system for a machine tool, according to the present invention, comprises: a numerical control unit; a main operation unit; a PLC which executes a control command via communication with the numerical control unit or the main operation unit; a servo drive which includes a notch filter unit and executes the control command from the PLC; a servo motor unit which is driven under the control of the servo drive; and a power conversion unit which is electrically connected to the servo motor unit and the servo drive so as to apply current to the servo motor unit, wherein the servo drive suppresses resonance due to the operation of the servo motor unit by controlling the application state of current transferred to the power conversion unit according to changes of notch &; filter coefficients calculated in real time at the notch filter unit.

A ladder diagram monitoring device displays an operation situation of a ladder program executed on a programmable controller built in a CNC on a monitor. A comment added to a circuit of the ladder program is provided with a region for displaying information on an operation situation of the CNC, the operation situation of the ladder program is reflected in the region, and display data in which the operation situation of the CNC is displayed is displayed.

A numerical controller includes a programmable controller that performs input and output of a signal based on a ladder program and performs control of a machine based on an NC program. The numerical controller includes a first table associating the function used for control of the machine, an input signal, and an output signal and a second table associating the input signal, the output signal, and a signal in a dependent relation with the input signal and the output signal. Based on a function code of a function commanded by a block of the NC program that is preread, the numerical controller refers to the first and the second tables, identifies a signal to be subjected to automatic trace, and performs trace.