[en] The description of software of communication of SM-4 computer and microprocessor crate controllers on the base of K580IK80 microprocessor in the tokamak technological equipment control system is given. The developed communication system ensures the solution of the problems of collection of large (up to hundreds of K byte) data array in acceptable time. This system can be applied for realization of automated control by a sufficiently wide class of electrophysical devices. Simple realizability, software, compactness, conservation of universal possibilities of base operation systems should be considered as advantages of the system