System for data transfer protection during module

Abstract

A plurality of digital modules on a Futurebus Plus common system bus means in a network are connected by the Futurebus Plus system bus for transfer of data between modules. A sending module (master) transmits address and message data on the bus to a receiving module (slave). Each module provides an interface having a Longitudinal Redundancy Checker such that the sending module transmits a first check word to the receiving module which generates a second check-word. If these check words match, then the data is accepted as good. Thus, the network can work continuously using the system bus even while new digital modules are inserted onto the system bus or detached from the system bus.