This is the control of Siemens frequency converter s7

PID是控制智能小车的经典算法在过程控制中，按偏差的比例（P）、积分（I）和微分（D）进行控制的PID控制器（亦称PID调节器）是应用最为广泛的一种自动控制器。它具有原理简单，易于实现，适用面广，控制参数相互独立，参数的选定比较简单等优点；而且在理论上可以证明，对于过程控制的典型对象──“一阶滞后＋纯滞后”与“二阶滞后＋纯滞后”的控制对象，PID控制器是一种最优控制-PID control of the smart car is the classic algorithm in process control, according to the percentage of deviation (P), Integral (I) and differential (D) control of PID controller (also known as PID regulators) is the most widely used as a automatic controller. It has simple, easy to realize, the application of a wide range of control parameters are independent of each other, the selection of relatively simple parameters, etc. and in theory can be proved that for a typical process control objects ─ ─

1． 电梯初始位置在第一层。 2． 算法完全模拟电梯工作。 3． 显示电梯所在层数和运动方向。 4． 按键复用，部分按钮在不同的时候表示两种功能。 -1. Elevator initial position in the first layer. 2. Algorithm fully simulated elevator work. 3. Show where the low-rise elevator direction and movement. 4. Key reuse, and some buttons at different times, said two functions.

因需要，单片机的键盘扫描和数码管显示共用一口，用定时器实现，原创-Due to the needs of single-chip microcomputer keyboard scanning and sharing a digital tube display with a timer to achieve the original

这是我在学校做电子钟留下的资料 希望能给你带来帮助-This is my electronic bell in the school do hope that they will be left behind by the information to help you

凌阳32位单片机开发的小游戏，大鱼吃小鱼，简单易学。-Sunplus 32-bit single-chip development game,大鱼吃小鱼, easy to learn.

C51 TIMER 0的使用 Timer_0_mode_1_timer_gate_hard-C51 TIMER 0 use Timer_0_mode_1_timer_gate_hard

另外一个RC531非接触式读卡器的全部源代码，实现全部功能-another RC531 non-contact reader the full source code, to achieve full functionality

用过采样和求均值技术提高模数转换器的分辨率.pdf-----针对目前单片机内嵌的模／数转换器的分辨率太低，而外接高分辨率成本又太高的情况，提出了用“过采样和求均值”的技术来使在有用的测量频带内的信噪比得到改善，从而提高测量的分辨. 率。并利用 60 - 7 0 /对其结论进行仿真，且在单片机上予以实现，结果表明测量分辨率明显提高。-Sampling and averaging techniques used to improve the resolution of ADC. Pdf----- targeted at the embedded microcontroller A/D converter resolution is too low, while the external high-resolution costs are too high situation, put forward with " Oversampling and Averaging" technology to make useful measurements in the frequency band signal to noise ratio to be improved, thereby enhancing the measurement resolution. rate. And a 60- 7 0/simulation of its conclusions, and in the SCM to be achieved, results show that the measurement resolution has improved significantly.

通过控制步进电机的驱动板来控制步进电机实现阀门流量的恒定，可作为反馈系统的参考-By controlling the stepper motor driver board to control the stepper motor to achieve a constant flow valve can be used as a reference feedback system