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Method for effecting controlled synchronization on unstable clock pulse system, and corresponding receiving unit

A clock pulse and receiving unit technology, which is applied to the control synchronization of an unstable clock pulse system and the corresponding receiving unit field, can solve the problem that the machine tool can no longer determine the position of the axis.

Inactive Publication Date: 2004-02-18
SIEMENS AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] However, the absence of a stable clock pulse generated by the PLL will cause the machine tool to no longer determine the position of its axes, and the machine operator must relearn the axes

Method used

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  • Method for effecting controlled synchronization on unstable clock pulse system, and corresponding receiving unit
  • Method for effecting controlled synchronization on unstable clock pulse system, and corresponding receiving unit
  • Method for effecting controlled synchronization on unstable clock pulse system, and corresponding receiving unit

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Embodiment Construction

[0028] according to figure 1 , the distributed control system consists of a sending unit 1 and a receiving unit 2 connected to each other via a bus system 3 . The sending unit 1 periodically sends telegrams to the receiving unit 2, and the receiving unit 2 reacts accordingly to the received telegrams. For example, the receiving unit 2 reads input values ​​from the controlled technical device or application 4 and transmits output values ​​to the controlled technical device or application 4 . this is in figure 1 is indicated by an arrow between the receiving unit 2 and the controlled technical device or application 4 .

[0029] The communication between sending unit 1 and receiving unit 2 is usually implemented in the following periodic processing mode:

[0030] First, the sending unit 1 sends to the receiving unit 2 the output values ​​it is to output to the technical device / application 4 . It then transmits a command telegram to the receiving unit 2 . When transmitting a ...

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PUM

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Abstract

The invention discloses a method for controlled synchronization to an astable clock system, and reception unit corresponding thereto Soft synchronization using a slight change in the period duration of the clock signal (a) produced makes it possible to alter said clock signal such that a phase difference (c) between the stable clock signal (b) produced by a PLL (6) upon a synchronization signal (S) and the clock (signal (a) produced for the application (4) is slowly reduced until the two clock signals (a, b) are in synchronism with on another after a certain time. This means that the clock signals a produced largely keep their period duration, so that there is the assurance that applications called cyclically with this clock pulse can be executed to the full extent with the necessary degree of accuracy. By virtue of fluctuations in the period duration of the first clock transmitter which are corrected by the PLL (6) being mapped onto the second clock transmitter, a phase difference (c) which is to be compensated for remains constant. The process of soft synchronization thus barely differs from the normal operating state.

Description

technical field [0001] The invention relates to a synchronization method for a receiving unit and a corresponding receiving unit, wherein the receiving unit receives a synchronization signal periodically sent by a transmitting unit and sends the synchronization signal to a first clock pulse generator, which The first clock pulse generator sends out a clock pulse signal with a substantially stable quantity between two synchronization signals. Background technique [0002] Such synchronization methods and corresponding receiving units are generally known. They are used, for example, in fieldbus systems such as PROFIBUS. Such a fieldbus system is a distributed control system and generally comprises a sending unit (master component (Kopfbaugruppe), bus master) and a plurality of receiving units (slaves). The control of the individual slave components is usually carried out in that the transmitting unit sends command telegrams to the individual receiving units. After receiving...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05B19/418H04J3/06H04L12/413
CPCH04J3/0685
Inventor 亨德里克·罗奇迪特马·万纳
Owner SIEMENS AG