Electrical computers and digital data processing systems: input/ – Intrasystem connection – Bus access regulation
Reexamination Certificate
1999-02-01
2001-08-14
Ray, Gopal C. (Department: 2181)
Electrical computers and digital data processing systems: input/
Intrasystem connection
Bus access regulation
C710S120000, C710S008000, C709S253000
Reexamination Certificate
active
06275881
ABSTRACT:
BACKGROUND OF THE INVENTION
The invention relates to a device for an inherently safe matching of signals and more specifically to a device that allows the safe and efficient exchange of input/output modules within an automating system.
Such a device is known from WO 92/04813. Such a device for an inherently safe signal matching is intended to provide a safe separation, in the sense of an explosion protection, of the signal flow between an automating system and so-called field devices, i.e. sensors and actuators, in connection with an explosion-endangered process.
With the known device, a number of input/output modules can be plugged into a backwall plate with an assembly rail. These input/output modules are connected by means of a communications unit, also plugged into the assembly rail, with a computer of the automating system, wherein the setting of parameters and the initialization of the device takes place directly by the automating system.
This applies in the same way for performing a diagnosis, which is also performed directly by the automating system.
SUMMARY OF THE INVENTION
This invention is, therefore, based on the object of improving a device for the inherently safe signal matching of the type mentioned at the outset to the effect, that a modular construction of the device with automatic configuration is possible.
The device in accordance with the invention operates with input/output modules, which are connected via a communications module with devices for data processing and data storage with the automating system via a field bus. By means of this, and by means of at least one further standard interface connected with the communications module, it is possible to store and recall parameters for the initialization and automatic configuration of the device in accordance with the invention in the communications module, safely in case of a current supply net failure. Furthermore, the setting of parameters performed by the communications module, in particular with the modular construction of the backwall plate, furthermore is used for an easier adaptation of the device in accordance with the invention, for example in case of the removal of this device.
In the article “Sensorsysteme für die Betriebsme&bgr;technik und Kommunikation im Feld” [Sensor Systems for Industrial Measuring Technology and Communications in the Field] in ATM, Automatisierungstechnische Praxis+Messen, Steuern, Regeln 34 [Practical Technical Automation+Measuring, Controlling, Regulating] (1991, pages 511 to 516) various sensor systems are known, of which one system can be connected, for example by means of a further interface card, with the field apparatus from other manufacturers in order to operate it. Furthermore, this system has a bus, by means of which further field devices can be connected via measuring transformers without the interposition of a communications module in the conventional manner.
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Schneider, Hans-Josef, “Sensor Systems for Measuring and Communication Technology in Production Plants”, Automatisierungstechnische Praxis—ATP, vol. 33, No. 10, Oct. 1991, pp. 511-516, Munchen, Germany.
Karsten, Andreas, “Individualisten”, Elektrotechnik, vol. 76, No. 4, Apr. 1994, pp. 40-42, Wurzburg, Germany.
Becker Udo
Doege Ralf
Horstmann Rolf
CEAG Sicherheitstechnik
Fish & Richardson P.C.
Ray Gopal C.
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