As any error in your SQL will cause an exit, not just a credential problem, you'll loop around when you don't want to, as you noted in a comment.
由于在SQL任何错误都将导致一个出口，不只是一个凭证问题，您周围的循环，当你不想要，因为你在评论中指出的。
Stepper motor control can be used as a special motor, do not use their accumulated error (accuracy of 100%) the characteristics of a wide range of open-loop control.
步进电机可以作为一种控制用的特种电机，利用其没有积累误差(精度为100%)的特点，广泛应用于各种开环控制。
Contrasted with the feedback loop this method is more accurate, the timing error is caught faster, the time resource is not necessary and it does not occupy resources of the hardware in DSP.
这种方法比反馈环法定时精度高，定时误差捕获快，并且不需要时钟源，不占用片内硬件资源，适合于全软件化设计要求。
It is proved that the proposed method can not only guarantee the stability of the closed-loop system, but also make the tracking error converge to the origin or its small neighborhood.
该方法不但能保证闭环系统稳定，而且可使跟踪误差收敛于原点或原点的一个小邻域内。
The PI observer has two feedback loops, a proportional loop and an integral loop of the estimation error; in this way, the PI observer can estimate not only the states but also the unknown inputs.
该观测器包含有估计误差的比例和积分回路，可同时得到状态和未知输入估计。
The error does not seem to ever appear now that I have introduced a new timer that resets the loop that runs a query against my linked tables.
似乎是错误不会永远出现，现在我已经介绍了新的计时器，重置运行对我的链接表的查询循环。
The error does not seem to ever appear now that I have introduced a new timer that resets the loop that runs a query against my linked tables.
似乎是错误不会永远出现，现在我已经介绍了新的计时器，重置运行对我的链接表的查询循环。
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