COMMUNICATION SAFETY SYSTEM FOR DATA HIGHWAY

摘要

A procedure to prevent that a master computer of data acquisition, when consulting a slave computer of control of the process can alter the state of the memory and of condition of danger in the process or well in the control of the same. A part of the memory of each process control slave computer (64, 66, 68, 70, 72) is separated as an intermediate memory, which is accessible both for the slave process control computer as well as for the master computer of data acquisition (58). (Machine-translation by Google Translate, not legally binding)