目前手工编程已无法满足工厂生产进度的要求，且手工编制的程序无法保证正确性和可靠性。

Manual programming can not meet the requirement of timely factory production now, and the accuracy and the reliability of the manual programs can not be ensured.

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使用该方法设计出的通讯程序可靠性高、潜在故障少，可保证高质量的数据块通讯的要求。

The communication program which USES the given method has the characteristics of high reliability and less latent faults, and it could guarantee the high quality data communication.

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因此注意保证可编程序控制器的可靠性，对于PLC更好的应用，是非常重要的。

Therefore, it is very important for the application of PLC to ensure the reliability of the programmable logic controller-PLC.

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