Abstract
The safety control system, which is defined as machine operation controlled according to safety confirmation information, is explained as an interlocking model that functions so that energy output from the machine is permitted only while the information (safety information) reports safety. The information transmission properties presented in this model are applied to all devices in this interlocking system, including the sensors for producing safety information and the devices for transmitting/outputting energy. A small energy-level signal signifying safety is normally produced in a pickup element in the sensor. Enormous power generated by amplifying the energy of the safety signal is supplied to the machine for use in its powerful operation. This paper discusses the condition of the energy transmission process in which energy is produced in a safety sensor as a signal indicating safety and is amplified in the interlocking system up to the sufficient level for performance of machine duties. Firstly, in this paper, the characteristics of information to be provided with the means of information processing in the interlocking system are clarified. Secondly, a logical fail-safe model is proposed for clarifying the production condition of the safety information. Lastly, this fail-safe energy-transmitting system with the safety information can be applied to not only electrically but mechanically processed safety information.
