System analyzer and method for analyzing an impact of a change in a component of a distributed control system

摘要

A system analyzer and a method for analyzing an impact of a change in a component of a distributed control system (DCS) are disclosed. The system can collect and store data representing the DCS components and their interconnection as well as signals of the DCS components. The DCS can be graphically modeled with nodes and directed edges, wherein a node represents either a type of DCS component or a signal of a DCS components, and wherein an edge is an “influence”-edge, or a “contains”-edge. Information on a change of a DCS components is received, a depth first or breadth first search is performed over the “influence”-edges and “contains”-edges and determine unchanged DCS components which would be affected by a malfunction, a removal or a taking out of operation of the at least one DCS component, and information on the affected DCS components is transmitted to an operator interface.

主权项

1. A system analyzer for analyzing an impact of a change in a component of a distributed control system (DCS), the system analyzer comprising:
a data collecting unit with data storage means for collecting and storing data representing DCS components and their interconnection; a model generating unit for modeling a DCS; and a model analyzing unit, wherein: the data collecting unit is configured to collect the data from at least a network infrastructure tool and from a control logic tool, wherein the collected data includes data on signals which are generated, processed, and/or transmitted by DCS components; the model generating unit is configured to model a DCS using a graphic representation with nodes and directed edges, wherein a node represents: either a type of a DCS component, with each type being defined to include at least network switches, routers, network cables, controllers, actuators and sensors; or a signal generated, processed and/or transmitted by a DCS component; and wherein: an edge belongs to one of two categories: an “influence”-edge which reflects that a change in a starting node of the “influence”-edge results in a change in an ending node of the “influence”-edge; or a “contains”-edge which reflects that a failure in a starting node of the “contains”-edge results in a failure in an ending node of the “contains”-edge, and a failure in the ending node leads to a partial failure in the starting node; and wherein the model analyzing unit is configured to: receive information on a change concerning at least one DCS component; perform a depth first or breadth first search over the “influence”-edges and “contains”-edges and determine which of unchanged DCS components would be affected by a malfunction, a removal or a taking out of operation of a DCS component; and transmit information on affected DCS components to an operator interface for display on a screen.