Industrial Automatic Control Systems and Controllers Annotation << Back Implementation of Switching on the Controller Unit to the Backup Channel B.G. Sevastyanov To improve the recognition of failure or channel failure in the program is based on the principle of caution. In most cases, to improve the reliability of the information used is information redundancy. For example, when the transfer of bytes of information transmitted by the control bits. In this case, to improve the reliability of recognition of accurate information in the program temporal redundancy: an analysis of the reliability of the signal is performed for two cycles of the controller. The program involves two multivibrator: fast (short period) and slow (long period), and the timer provides a reset trigger of the failure of the channel with delay. The algorithm of automatic recognition of health two measurement channels in General is quite complicated. The article discusses the situation in case e is close (within the error of measurement channels) values of the main and backup channel. Keywords: detection of failure or malfunction signal; check reliable signal; memorizing reliable signal; the trigger of failure; multivibrator; the cycle controller. Contacts: E-mail: seva-boris@yandex.ru Pp. 54-60.