三菱的编程软件从早期的FXGPWIN到近期的GX8.0(小编所知道新的)，和所有的日系品牌一样，该软件的编程思路是自上而下的单一 纵向结构，而西门子的MicroWIN则是纵向和横向兼备的结构，而且子程序支持局部变量，相同的功能只需要编一次程序即可，大大减少了开发难度和时间。2、S7-200一直以来支持强大的浮点运算，编程软件直接支持小数点输入输出，而三菱直至近年推出的FX3U系列才有此种功能，以前的FX2N系列的浮点功能都是假的。3、S7-200的模拟量输入输出程序非常简单方便，AD、DA值可以不需编程直接存取的，三菱的FX2N及其以前的系列都需要非常繁琐的FROMTO指令。FX3U如今倒支持此功能了，但足足晚了五年甚至更多。4、当然三菱的FX2N系列也有它自己的优势，一是高速计数器指令比S7-200方便，二是422口比西门子的PPI口皮实（因为200系列的PPI口是非光电隔离的非规范操作和仿制的编程电缆可能会导致串口损坏）。以上的比较仅仅是小型机，至于西门子的300和400系列以及更大型的TDC系列，这里就无需多言了。学PLC，三菱是很容易上手的，因为直来直去思路简单，但从学习的角度讲，肯定是西门子更好。
Mitsubishi's programming software is from the early fxgpwin to the recent gx8.0 (the latest known by Xiaobian). Like all Japanese brands, the programming idea of this software is a single vertical structure from top to bottom, while Siemens' microwin is a structure with both vertical and horizontal structures. Moreover, the subroutine supports local variables, and the same function only needs to be programmed once, which greatly reduces the difficulty and time of development. 2. S7-200 has always supported powerful floating-point operation, and the programming software directly supports decimal point input and output. Mitsubishi didn't have this function until the FX3U series launched in recent years. The floating-point function of the previous FX2N series is false. 3. The analog input and output program of S7-200 is very simple and convenient. AD and Da values can be accessed directly without programming. Mitsubishi FX2N and its previous series require very cumbersome fromto instructions. FX3U now supports this function, but it is five years or more late. 4. Of course, Mitsubishi FX2N series also has its own advantages. First, the high-speed counter instruction is more convenient than S7-200, and second, the 422 port is more compact than Siemens' PPI port (because the PPI port of 200 series is non photoelectric isolation, non-standard operation and imitation programming cable may cause serial port damage). The above comparison is only for small computers. As for Siemens' 300 and 400 series and larger TDC series, there is no need to say more here. Mitsubishi is easy to learn PLC, because it is straightforward and simple, but from the perspective of learning, Siemens is definitely better.
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