[en] The on-line control system for dosimetric monitoring of the ''F'' installation is described. The system is designed for continuous measurements of the radiation in the accelerator rooms and for automatic alarm control of the accelerator operation and beam channels. The system may be subdivided in three parts according to its functions and location. The first part includes 34 ionizing radiation detectors; the second - express data processing; the third - display console, where the final data processing is performed. The second part operates on-line with periodical (once a few seconds) processing of data from the detectors. The results of operative control are output onto the screen and into the accelerator control system. The third system operates in dialogue mode. The operator chooses one of the given microcomputer variants for data processing