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DE4233301C1 - Position regulator using pneumatically-operated electromagnetic valves - uses microprocessor evaluating setting disparity to indicate fault in setting regulator or setting device. - Google Patents

Position regulator using pneumatically-operated electromagnetic valves - uses microprocessor evaluating setting disparity to indicate fault in setting regulator or setting device.

Info

Publication number
DE4233301C1
DE4233301C1 DE19924233301 DE4233301A DE4233301C1 DE 4233301 C1 DE4233301 C1 DE 4233301C1 DE 19924233301 DE19924233301 DE 19924233301 DE 4233301 A DE4233301 A DE 4233301A DE 4233301 C1 DE4233301 C1 DE 4233301C1
Authority
DE
Germany
Prior art keywords
setpoint
setting
difference
control
value
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Revoked
Application number
DE19924233301
Other languages
German (de)
Inventor
Vidal Fausto Crespo
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Samson AG
Original Assignee
Samson AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Samson AG filed Critical Samson AG
Priority to DE19924233301 priority Critical patent/DE4233301C1/en
Priority to DE9219140U priority patent/DE9219140U1/en
Application granted granted Critical
Publication of DE4233301C1 publication Critical patent/DE4233301C1/en
Anticipated expiration legal-status Critical
Revoked legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B19/00—Programme-control systems
    • G05B19/02—Programme-control systems electric
    • G05B19/18—Numerical control [NC], i.e. automatically operating machines, in particular machine tools, e.g. in a manufacturing environment, so as to execute positioning, movement or co-ordinated operations by means of programme data in numerical form
    • G05B19/406—Numerical control [NC], i.e. automatically operating machines, in particular machine tools, e.g. in a manufacturing environment, so as to execute positioning, movement or co-ordinated operations by means of programme data in numerical form characterised by monitoring or safety
    • G05B19/4062—Monitoring servoloop, e.g. overload of servomotor, loss of feedback or reference

Landscapes

  • Engineering & Computer Science (AREA)
  • Human Computer Interaction (AREA)
  • Manufacturing & Machinery (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Automation & Control Theory (AREA)
  • Control Of Position Or Direction (AREA)

Abstract

The regulator has a final control device (16) controlled by 2 electromagnetic values (12,14) converting a control current received via a control signal line into a corresp. control pressure. A microprocessor (10) detects the variation in the setting device required value indicated by the control signal and compares the difference between the required and actual values or the integral of this difference after the variation of the required value with an acceptable tolerance value, to allow a fault status signal to be supplied. Pref. the fault status signal is supplied as a digital signal to the control signal line when the disparity between the difference or the difference integral and the tolerance value is outside a defined range obtained via a calibration procedure. ADVANTAGE - Rapid fault identification.

Description

Die Erfindung betrifft einen Stellungsregler mit zwei ein Stellgerät steuernden, pneumatisch betriebenen elektromagnetischen Ventilen, die einen über eine Steu­ ersignalleitung zugeführten Steuerstrom in einen Steuer­ druck wandeln.The invention relates to a positioner with two an actuator controlling, pneumatically operated electromagnetic valves that have a control ersignalleitung supplied control current in a tax change pressure.

Die Zuverlässigkeit derartiger aus der DE 41 05 062 A1 bekannter Stellungsregler und die Erkennung etwaiger Fehlfunktionen eines solchen Stellungsreglers und des von diesem gesteuerten Stellgerätes sind von großer Wichtigkeit.The reliability of such from DE 41 05 062 A1 known positioner and the detection of any Malfunctions of such a positioner and the of this controlled actuator are great Importance.

Der Erfindung liegt die Aufgabe zugrunde, einen Stel­ lungsregler zu schaffen, der ein frühzeitiges und zuver­ lässiges Erkennen einer Fehlfunktion von Stellungsregler oder Stellgerät ermöglicht. The invention has for its object a Stel to create a regulator that ensures early and reliable casual detection of a malfunction of the positioner or actuator.  

Erfindungsgemäß wird diese Aufgabe durch die Merkmale des Anspruchs 1 gelöst. Die Unteransprüche geben vor­ teilhafte Ausgestaltungen der Erfindung an.According to the invention, this object is achieved by the features of claim 1 solved. The sub-claims specify partial embodiments of the invention.

Ein Ausführungsbeispiel der Erfindung wird im folgenden anhand einer Zeichnung erläutert. Dabei zeigt die einzige Figur eine schemati­ sche Darstellung des Stellungsreglers nach der Erfin­ dung.An embodiment of the invention is described below with reference to a drawing explained. The only figure shows a schematic cal representation of the positioner after the Erfin dung.

Der Stellungsregler besteht - in üblicher Weise - aus zwei elektromagnetischen Systemen 12, 14, über die ein Stellgerät 16 gesteuert wird. Ein an dem Stellgerät an­ geordneter Sensor 18 erfaßt den Istwert des Stellgerä­ tes. Der über eine Steuersignalleitung als Steuerstrom dem Stellungsregler zugeführte Sollwert wird von einem Mikroprozessor 10 abgefragt. Bei einer erheblichen Ände­ rung des Sollwerts (die sich anhand der absoluten Ände­ rung oder aber aus einer zeitlichen Differenzierung des Sollwerts ergeben kann) wird ein Zeitgeber gestartet. Alternativ (oder zusätzlich) kann ein Integrator, der den Sollwert numerisch integriert, gestartet werden. Nach einer vorgegebenen Zeitdauer mißt der Mikroprozes­ sor die Differenz zwischen Sollwert und Istwert. Der Wert des numerischen Integrals über die Regelabweichung wird solange gebildet, bis der Istwert sich dem Sollwert bis auf eine vorgegebene Regelabweichung annähert. Die sich dabei ergebenden Werte der Regelabweichung bzw. des Integrals über die Regelabweichung werden mit einem Wert verglichen, der der zulässigen Abweichung entspricht. Fällt der Wert der Regelabweichung bzw. des zeitlichen Integrals über die Regelabweichung aus einem zulässigen Bereich hinaus, wird ein Fehlerstatussignal als digita­ les Signal auf eine gesonderte Signalleitung bzw. auf die Steuersignalleitung aufgegeben. The positioner consists - in the usual way - of two electromagnetic systems 12 , 14 , via which an actuator 16 is controlled. A sensor 18 arranged on the control device detects the actual value of the control device. The setpoint value supplied to the positioner as a control current via a control signal line is queried by a microprocessor 10 . If the setpoint changes significantly (which can result from the absolute change or from a time differentiation of the setpoint), a timer is started. Alternatively (or additionally) an integrator can be started that numerically integrates the setpoint. After a predetermined period of time, the microprocessor measures the difference between the setpoint and the actual value. The value of the numerical integral over the control deviation is formed until the actual value approaches the setpoint except for a predetermined control deviation. The resulting values of the control deviation or the integral over the control deviation are compared with a value that corresponds to the permissible deviation. If the value of the control deviation or the time integral falls beyond the control deviation from a permissible range, an error status signal is sent as a digital signal to a separate signal line or to the control signal line.

Der Bereich der zulässigen Abweichung kann dabei durch das Ausführen von Initialisierungsläufen vorgegeben wer­ den: Der Mikroprozessor erfaßt die bei Normalbetrieb auftretende Regelabweichung. Diese ergibt mit einem Fak­ tor K < 1 multipliziert den Bereich der zulässigen Ab­ weichung. Der Faktor K gibt dabei die Sensibilität an, mit der der Mikroprozessor Fehler des Systems anzeigen soll.The range of the permissible deviation can be determined by the execution of initialization runs den: The microprocessor detects the during normal operation occurring control deviation. With a fac tor K <1 multiplies the range of the permissible Ab softening. The factor K indicates the sensitivity which the microprocessor uses to display system errors should.

Claims (4)

1. Stellungsregler mit zwei ein Stellgerät (16) steu­ ernden, pneumatisch betriebenen, elektromagnetischen Ventilen (12, 14), die einen über eine Steuersignallei­ tung geführten Steuerstrom in einen Steuerdruck wan­ deln, gekennzeichnet durch einen Mikroprozessor (10), der eine sich aus dem Steuerstrom ergebende, erhebliche Änderung des Sollwerts des Stellgeräts (16) erkennt, die Differenz zwischen Sollwert und Istwert zu wenig­ stens einem vorgegebenen Zeitpunkt nach der erheblichen Änderung des Sollwerts oder das zeitliche Integral der Differenz zwischen dem Sollwert und dem Istwert nach der erheblichen Änderung des Sollwerts bis zur Annäher­ ung des Istwerts an den Sollwert bis auf einen vorgebe­ nen Toleranzwert ermittelt, den Wert der Differenz bzw. den Wert des Integrals zu diesem Zeitpunkt bzw. bei der Annäherung des Istwerts an den Sollwert mit einem die zulässige Abweichung angebenden Wert vergleicht und bei Überschreiten der zulässigen Abweichung ein Fehlersta­ tussignal abgibt.1. Positioner with two an actuator ( 16 ) control-generating, pneumatically operated, electromagnetic valves ( 12 , 14 ) which convert a control current led control current into a control pressure, characterized by a microprocessor ( 10 ), which is one the control current resulting, significant change in the setpoint of the actuator ( 16 ) recognizes the difference between the setpoint and the actual value at least a predetermined time after the significant change in the setpoint or the time integral of the difference between the setpoint and the actual value after the significant change in Setpoint until the actual value approximates the setpoint to a predetermined tolerance value, compares the value of the difference or the value of the integral at this time or when the actual value approaches the setpoint with a value indicating the permissible deviation and if the permissible deviation is exceeded, a fault status emits a signal. 2. Stellungsregler nach Anspruch 1, dadurch gekenn­ zeichnet, daß das Fehlerstatussignal als digitales Sig­ nal auf eine gesonderte Signalleitung abgegeben wird. 2. Positioner according to claim 1, characterized records that the error status signal as a digital Sig nal is delivered to a separate signal line.   3. Stellungsregler nach Anspruch 1, dadurch gekenn­ zeichnet, daß das Fehlerstatussignal der Steuersignal­ leitung als digitales Signal aufgegeben wird.3. Positioner according to claim 1, characterized records that the error status signal is the control signal line as a digital signal. 4. Stellungsregler nach einem der vorangehenden An­ sprüche, dadurch gekennzeichnet, daß die zulässige Abweichung durch Ausführen von Initialisierungsläufen vorgegeben ist.4. Positioner according to one of the preceding An sayings, characterized in that the permissible Deviation due to initialization runs is specified.
DE19924233301 1992-10-03 1992-10-03 Position regulator using pneumatically-operated electromagnetic valves - uses microprocessor evaluating setting disparity to indicate fault in setting regulator or setting device. Revoked DE4233301C1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE19924233301 DE4233301C1 (en) 1992-10-03 1992-10-03 Position regulator using pneumatically-operated electromagnetic valves - uses microprocessor evaluating setting disparity to indicate fault in setting regulator or setting device.
DE9219140U DE9219140U1 (en) 1992-10-03 1992-10-03 Positioner

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19924233301 DE4233301C1 (en) 1992-10-03 1992-10-03 Position regulator using pneumatically-operated electromagnetic valves - uses microprocessor evaluating setting disparity to indicate fault in setting regulator or setting device.

Publications (1)

Publication Number Publication Date
DE4233301C1 true DE4233301C1 (en) 1994-02-17

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
DE19924233301 Revoked DE4233301C1 (en) 1992-10-03 1992-10-03 Position regulator using pneumatically-operated electromagnetic valves - uses microprocessor evaluating setting disparity to indicate fault in setting regulator or setting device.

Country Status (1)

Country Link
DE (1) DE4233301C1 (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4419548A1 (en) * 1994-06-03 1995-12-07 Samson Ag Supervision equipment and procedure for electro-pneumatic position regulator
DE4445058A1 (en) * 1994-06-02 1995-12-07 Mannesmann Ag Control valve with a pressure medium operated drive and a positioner
DE29804811U1 (en) * 1998-03-17 1998-07-16 Bürkert GmbH & Co Werk Ingelfingen, 74653 Ingelfingen Binary electrically controllable fluidic power amplifier
FR2764712A1 (en) * 1997-06-05 1998-12-18 Samson Ag METHOD AND DEVICE FOR MONITORING A CONTROLLER
EP1736841A1 (en) * 2005-06-22 2006-12-27 Robert Bosch Gmbh Method for the automated testing of an actuator
DE102005049061B3 (en) * 2005-10-13 2007-03-29 Samson Ag Pneumatic positioner position control device for use in process automation, has pneumatic bypass booster that is switched and adjusted such that bypass booster operates with small changes of signals of position controller-reference value
DE102007037696B3 (en) * 2007-08-09 2009-01-22 Samson Ag Anti-surge protection device for pneumatic actuator, has position controller pneumatically controlling actuating drive, where two control signals are respectively produced by pressures of actuating drive and controller

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2630433A1 (en) * 1976-07-07 1978-01-12 Torwegge Maschf F Woodworking machine control mechanism with coaxial chain wheels - has tachometers to feed speed signals to comparator also supplied with control signals and correction values
GB2026203A (en) * 1978-03-23 1980-01-30 Fujitsu Fanuc Ltd Profile control system
DE4105062A1 (en) * 1990-09-19 1992-03-26 Helmut Prof Dipl Ing Hoenicke Electropneumatic regulator with pulse width control - provided by operating solenoid valve in reduced current drive mode around set point

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2630433A1 (en) * 1976-07-07 1978-01-12 Torwegge Maschf F Woodworking machine control mechanism with coaxial chain wheels - has tachometers to feed speed signals to comparator also supplied with control signals and correction values
GB2026203A (en) * 1978-03-23 1980-01-30 Fujitsu Fanuc Ltd Profile control system
DE4105062A1 (en) * 1990-09-19 1992-03-26 Helmut Prof Dipl Ing Hoenicke Electropneumatic regulator with pulse width control - provided by operating solenoid valve in reduced current drive mode around set point

Non-Patent Citations (4)

* Cited by examiner, † Cited by third party
Title
Hartmann & Braun, Schoppe & Faeser, Technische Information: Automatisierungssystem Contronic 3, 1980, S. 7, 8 *
Mannesmann, Hartmann & Braun, Technische Infor- mation 30/66-5501-4: Automatisierungssystem Contronic 3, S. 1-21 *
Mannesmann, Hartmann & Braun, Technische Infor- mation 30/66-7702-2, Automatisierungssystem Contronic 3, S. 1-23 *
SAMAL, E., Dr.-Ing.: Grundriß der praktischen Regelungstechnik, 16. überarbeitete Auflage, bearbeitet von Prof. Dr.-Ing. W. Brecker, R. Oldenbourg Verlag, MÜnchen, Wien 1990, S. 33-37 und 278-291 *

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4445058A1 (en) * 1994-06-02 1995-12-07 Mannesmann Ag Control valve with a pressure medium operated drive and a positioner
DE4419548A1 (en) * 1994-06-03 1995-12-07 Samson Ag Supervision equipment and procedure for electro-pneumatic position regulator
DE4419548B4 (en) * 1994-06-03 2004-02-19 Samson Ag Procedure for monitoring the functionality of a pneumatic actuator
FR2764712A1 (en) * 1997-06-05 1998-12-18 Samson Ag METHOD AND DEVICE FOR MONITORING A CONTROLLER
DE19723650C2 (en) * 1997-06-05 2001-10-18 Samson Ag Method and device for monitoring an actuator
DE19723650B9 (en) * 1997-06-05 2004-04-29 Samson Ag Method and device for monitoring an actuator
DE29804811U1 (en) * 1998-03-17 1998-07-16 Bürkert GmbH & Co Werk Ingelfingen, 74653 Ingelfingen Binary electrically controllable fluidic power amplifier
EP1736841A1 (en) * 2005-06-22 2006-12-27 Robert Bosch Gmbh Method for the automated testing of an actuator
DE102005049061B3 (en) * 2005-10-13 2007-03-29 Samson Ag Pneumatic positioner position control device for use in process automation, has pneumatic bypass booster that is switched and adjusted such that bypass booster operates with small changes of signals of position controller-reference value
US7406910B2 (en) 2005-10-13 2008-08-05 Samson Ag Device and method for controlling the position of a pneumatic actuator
DE102007037696B3 (en) * 2007-08-09 2009-01-22 Samson Ag Anti-surge protection device for pneumatic actuator, has position controller pneumatically controlling actuating drive, where two control signals are respectively produced by pressures of actuating drive and controller

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8100 Publication of the examined application without publication of unexamined application
D1 Grant (no unexamined application published) patent law 81
8363 Opposition against the patent
8331 Complete revocation