Schneider Electric Industries Sas

Mireille Roger

Alain Tardivon

Herve Dallet

Francis Chauvet

Marc Auger

Loïc Caseras

Gilles Gressier

Hervé Dallet

The invention relates to a universal interface (INT) arranged to be positioned between a detector (D) and a monitoring-control unit of equipment and comprising:

Universal interface for detector

A method is provided for monitoring a communication between a transmitting equipment item and a receiving equipment item, the transmitting equipment item transmitting control frames (TC_i) toward the receiving equipment item. The method makes it possible to optimize the frequency of transmission of diagnostic frames (TDx_i), thereby making it possible to avoid saturating the communication link and causing an overconsumption of electrical energy, while guaranteeing a high reliability concerning the state of the communication. The method makes it possible notably to adapt in real time the transmission of the diagnostic frames (TDx_i) to the state of the communication, by taking account of the fact that disturbances prevent the control frames (TC_i) from being correctly transmitted by the transmitting equipment item or received by the receiving equipment item and to adapt the transmission of the diagnostic frames (TDx_i) to the value of the rate of probability of occurrence of a communication failure (&#x3c4;), this rate being recalculated on each transmission of a control frame.

Method for monitoring communication between a transmitter and a receiver

A method for monitoring a communication between a transmitting equipment item and a receiving equipment item, said transmitting equipment item transmitting control frames (TC_i) to the receiving equipment item. The method makes it possible to take account of the fact that the control frames (TC_i) are not necessarily transmitted at fixed frequency and to adapt the transmission of the diagnostic frames (TDx_i) to the frequency of transmission of the control frames. Upon a significant variation of this transmission frequency, if no diagnostic frame has been transmitted between the two control frames, the instant of transmission of the next diagnostic frame will take account of this aspect. The method of the invention makes it possible to optimize the frequency of transmission of the diagnostic frames while guaranteeing a high reliability concerning the state of the communication, in order to avoid saturating the communication link and causing an overconsumption of electrical energy, and to adapt in real time the transmission of the diagnostic frames to the frequency of transmission of the control frames.

The invention relates to a method for monitoring a communication between a transmitter entity and a receiver entity. It consists of the transmission of diagnostic frames D dedicated to the monitoring of the communication. The objective of the monitoring is to ascertain the state of the communication before the next data communication frame C so as to be able to ensure that the latter has the maximum chance of taking place. Accordingly, at least one diagnostic frame D must be transmitted before the probable next transmission of a data communication frame C. The instant of transmission Tdiag[0] of the first diagnostic frame D is determined from the minimum period to be complied with between the transmission of two communication frames C. The instants of transmission Tdiag[i] of the diagnostic frames D which follow the first diagnostic frame transmitted at the instant Tdiag[0] are determined on the basis of an increasing function.

Method for monitoring a communication between a transmitter entity and a receiver entity

A reflector for use in a reflex mode detection device, said reflector being positioned in alignment with a detector and including a reflective region for reflecting a light beam to send the light beam back towards the detector, a signalling interface configured to indicate a state of alignment of the reflective region of the reflector with respect to an emitter, a detector configured to detect the presence of the light beam against the reflector, interpretation circuitry configured to control the signalling interface to indicate the state of alignment, and a power supply having autonomous electric power and configured to supply electric power to the signalling interface and the interpretation circuitry.

Reflector having a detector to detect the presence of light beam against the reflector and to indicate a state of alignment used in a reflex mode detection device

The invention relates to a safety detection system comprising a detection chain formed by a number of interconnected safety detectors (D, . . . D). The detectors (D, . . . D) in the chain are also interconnected in order to form a diagnostic line in parallel with the safety chain. The first detector thus comprises means for generating diagnostic information comprising its surveillance state, and means for sending this diagnostic information, on the diagnostic line, to the second detector in the chain, which in turn enriches the diagnostic information. At the end of the chain, the last detector is connected to a diagnostic module (MD) intended to receive the diagnostic information, to interpret it, and to control the start-up of the application to be secured.

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Ruelle-sur-Touvre, France

Mireille Roger