SOE event recording method and system

Abstract

The invention provides an SOE event recording method and system. The method comprises the following steps: firstly, carrying out time calibration on equipment of each level in a control system level by level according to an external time calibration clock; specifically, clock calibration information is sent to equipment of a next level in a level by level manner by taking a main controller as a starting point to carry out clock calibration. When an SOE module detects that a switching value input channel is changed, the change event is stored, and the calibrated timestamp is inserted to generate an SOE event. And then, starting from the SOE module, the upper-level equipment is notified level by level to read a new SOE event until the main controller reads the new SOE event. By means of thesolution, clock synchronization of all the equipment in the control system comprising the equipment adopting different communication protocols can be achieved, and therefore that the timestamps in theSOE events generated by the SOE module are accurate can be guaranteed. And meanwhile, the equipment of each level in the control system has a non-periodic communication mechanism, and the equipment of each level reads the SOE event in the equipment of the next level through the non-periodic communication mechanism, and therefore the SOE events are uploaded to the main controller level by level.

Description

technical field [0001] The invention belongs to the technical field of industrial control, in particular to a SOE event recording method and system. Background technique [0002] Sequence of event recording (sequence of event, SOE) is mainly used to record the accurate time of multiple switching input signal displacements when an accident occurs, so as to distinguish the sequence of multiple displacements. The SOE event is a switch input displacement event with a synchronous time stamp, that is, the SOE module not only needs to collect the state of the switch, but also needs to synchronously record the synchronization time stamp of the state change of the switch. [0003] SOE event records have been widely used in the field of industrial control technology, but most of them are for simple system applications, for example, SOE modules are directly connected to the main controller. As the control objects and / or control networks of industrial control systems become more and mo...

AI Technical Summary

Problems solved by technology

However, the above-mentioned SOE event recording method in the system in which the SOE module is directly connected to the main controller cannot be applied to such a complex control system. Therefore, there is an urgent need for a SOE event recording method suitable for complex control systems

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