Abstract:
Disclosed herein are methods, apparatus and articles of manufacture that provide modular monitoring, control and device management in a process control system. According to one example a method of replacing a first field device of a process control system with a second field device, wherein the first field device includes a removable data storage device includes extracting the removable storage device from the first field device, removing the first field device from the process control system, installing the second field device into the process control system; and installing the removable data storage device into the second field device.
Abstract:
A method and apparatus is disclosed for providing a motion signal to a motion platform comprising a plurality of actuators. The apparatus comprises a formatting unit receiving a motion signal indication of a motion to perform on the motion platform and formatting the motion signal and a synchronized unit receiving the formatted signal and providing a synchronized and formatted motion signal to the motion platform.
Abstract:
A safety network system is constructed by connecting a safety PLC to a safety slave through a safety network. The safety slave obtains safety input informations from a plurality of safety devices connected thereto and transmits information based on the plurality of safety input informations in response to a request from the safety PLC. At this time, the safety slave determines whether or not a safety condition is satisfied based on the plurality of safety input informations, includes two notification modes, that is, a result notification mode in which a result of determination of safety determined by the above determination is transmitted and a detailed information mode in which the plurality of safety input informations are transmitted as they are as aggregated data, and returns a safety response in any of the modes according to a command from the safety PLC. In the result notification mode, the response can be returned at a high speed because an amount of data is small, and, in the detailed information mode, detailed information can be secured.
Abstract:
A control system for controlling a position of a mass, such as, for example, a substrate holder in a lithographic apparatus, is presented herein. The control system comprises a first input to receive a desired position of the mass, a second input signal to receive a feedback signal indicative of the actual position of the mass, a control unit that produces a signal indicative of the required control force based on the difference between the desired mass position and the actual mass position, and an estimator unit that calculates an estimated relation between the control force and mass status information indicative of at least one of a position of said mass, a velocity of said mass, and an acceleration of said mass, and a third input to receive a feed-forward signal indicative of the desired mass acceleration. The control system then determines the control force needed to accelerate the mass and move it to a desired position based on the estimated relation and the desired mass acceleration.
Abstract:
For operating a positioning device of a multi-axes processing device having at least one processing for improving its positioning accuracy, a position change of the processing device and the associated processing head is controlled with a computer, work poses of the processing device and the associated processing head controlled by a computation and control unit of the processing device are detected, and the work poses are adjusted if necessary.
Abstract:
Multiple methods of using two sensors to move an object in a one dimensional environment, a two dimensional environment or a three dimensional environment. A method of using two sensors to move a cursor in a secondary mode and edit data in a third mode. A method of using two sensors to edit changes. A method of using two sensors to move a cursor in two axis graphic arts programs. A method of using two sensors to move an object in two directions, three directions, four directions, eight directions, ten directions or fourteen directions. A method of using two sensors to increase or decrease the speed of movement of an object.
Abstract:
The invention provides a computer system for realtime control of machines. The computer system continually switches between a realtime programs EP providing control of peripheral devices A1, An, including control and/or regulation, and other programs within the realtime clock periods. The computer system has communications system KS and a a control system SS connected to the peripheral devices A1, An, particularly motor driver devices, over the communications system KS. A realtime clock signal T is generated from an independent cyclic communications clock T2 of the communications system KS, which has a communications processor KP that operates in realtime. When the control processor SP is remote from the communications processor KP, the realtime clock T may be regenerated an incoming bus clock signal B by a counter Z having upper and lower thresholds K2 and K1.
Abstract:
An on-screen calibration system for disc drives and the operating method thereof. The calibration system includes an autocollimator detecting the inclined angle of the stage of a disc drive. A control module is connected to the on-screen display module and a bar code scanner to receive the bar code of the pick-up module and compute a predetermined position data. A monitor displays a moving point according to the inclined angle and a target point according to the predetermined position data through an on-screen display module. The tilt-adjusting mechanism supporting the pick-up module is adjusted to shift the moving point overlapping the target point.
Abstract:
An electronic apparatus forming a sensor, an actuator or a control is described comprising a control engine and an integrated bus interface. The apparatus can be connected via the bus interface to a data bus for the communication of the apparatus with at least one further apparatus forming a sensor, an actuator or a control and connected to the data bus. Furthermore, the apparatus includes a device-specific definition engine in which parameters required for the communication, function and/or configuration of the electronic apparatus are stored, with the device-specific definition engine being present in a device-specific format and the parameters being able to be accessed via the control engine. In accordance with the invention, a universal definition engine is provided which is present in a device-independent, standardized format and in which all the parameters of the electronic apparatus required for the communication, function and configuration and additional parameters characterizing the electronic apparatus are stored. Furthermore, the device-specific definition engine can be generated automatically from the universal definition engine.
Abstract:
A movement control system useful for an apparatus comprising a movable member movable between two positions, a motor and a sensor device for producing an output value which changes during the movement of the movable member. The control system drives the motor in a first amount so as to move the movable member from one of the two positions to the other position and thereafter drives the motor in a second amount to move the movable member toward said one position when the output value of the sensor device remains unchanged. When the sensor device produces a changed output value, the system drives the motor in a third amount to move the movable member toward said one position. Subsequently, the system drives the motor in a fourth amount when the output value of the sensor device is different from the output value before the motor is driven in the first amount, so as to move the movable member toward said other position. The system drives the motor in the second amount when the output values are the same so as to move the movable member toward said one position.