Method of synchronizing clock signal of multi-event sequence recording station

Abstract

The invention relates to a method and device for synchronizing clock signals for multiple sequence of events (SOE) stations, where the method is characterized by: connecting GPS system with serial interface of computer; compiling corresponding application software; connecting a computer with at least two SOE stations through a multiple communication card whose communication interfaces correspond to the SOE stations one to one; and the device is characterized by comprising a GPS system, a computer, at least two SOE station and a multiple communication card. And the advantages: time synchronizing accuracy of various SOE stations is within 1 ms; it is easy to obtain materials, and the cost is relatively low.

Description

Technical field: [0001] The present invention relates to a kind of method for synchronizing the clock signal of multi-event sequence recording station, in particular, relates to the method for large-scale distributed control system ( DCS )middle. Background technique: [0002] In a large distributed control system ( DCS ), it is often necessary to use the event sequence record ( SOE ) function, in the past large-scale distributed control system (DCS), if you want to use the function of sequence of events (SOE), usually only one SOE station is set, so that there is no need for synchronization, or even if there are several SOE stations , and the event signals between the stations of the SOE station are irrelevant, so there is no need for synchronization. With the continuous increase of the functions of the distributed control system (DCS) and the amount of input / output signals and the flexibility of the system design , several SOE stations are often used, and some event si...

AI Technical Summary

Problems solved by technology

[0002] In a large distributed control system ( DCS ), it is often necessary to use the event sequence record ( SOE ) function, in the past large-scale distributed control system (DCS), if you want to use the function of sequence of events (SOE), usually only one SOE station is set, so that there is no need for synchronization, or even if there are several SOE stations , and the event signals between the stations of the SOE station are irrelevant, so there is no need for synchronization. With the continuous increase of the functions of the distributed control system (DCS) and the amount of input / output signals and the flexibility of the system design , several SOE stations are often used, and some event signals between the SOE stations are related, so it is necessary to synchronize the different SOE stations. In the past, the time broadcast method on the Ethernet was mostly used for synchronization. The advantage of the synchronization method is that there is no need to add additional hardware resources, but the disadvantage is that the time accuracy of its synchronization can only reach a few milliseconds at most. Another method is to set up a set of GPS system, its advantage is that the synchronization accuracy is very high, but this often makes the system cost very high

However, the resolution required by the SOE station is 1 millisecond or hundreds of microseconds, so the previous methods generally cannot meet the actual needs

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