ABB SC610

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描述

ABB SC610
计算机面向对象编程的优点也有重用性和易管理型，在PLC中也曾在，以Step7为例，需要讨论FC和FB的差异。观察数据类型，FB比FC只不过多一个“STAT”类型，在使用上FB需要背景DB，FC不需要，但就这个差别导致FB拥有自己独立的数据储存空间，而FC的数据储存却必须借助公有变量（如中间变量M或者共享DB），有这样一种准则，程序块的独立性越强，其重用性也越好，产生数据访问冲突的可能性也更少，则更易于管理。有些公司生产的PLC，其程序语言没有类似FB的这种特性，这时可以采用类似“FC+共享DB”的替代方案解决，但它的独立性已经大大降低。
同样的代码的独立性是标准制定的一个重要环节，很难想象一个与其他功能块之间有着千丝万缕联系的功能块能够被作为标准块在不同工程中有效的重复使用。
纵观计算机语言的发展，最开始的编程都是令人恐怖的，而当今的编程让人们得到很大的解脱，有很多现成的标准类库实用，人们可以把更多的编程精力放在实现功能本身上，plc编程也应该朝这种方向发展，应该让更多的人从事应用层面的设计，那些标准功能块不应该重复的被不同人员开发，虽然各大PLC厂开发了大量的程序库，但工业控制对象各式各样，不同行业都应该拥有自己的程序库，而代码的可重用性是评价这些功能块好坏的关键。

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选择深圳长欣，选择放心，售后无忧大量现货，当天顺丰发货！
主营：本特利，英维思，伍德沃德，福克斯波罗、西屋、瑞恩、施耐德莫迪康、ABB、AB、西门子、摩托罗拉、GE发那科、安川、博世力士乐，ACSO，力士乐等各大品牌的DCS系统配件，机器人系统配件，大型伺服系统备件。

先介绍几点经验。
1、先通读一遍“系统手册”（不管能不能看懂，先了解个大概，以便学习编程时查找）；
2、由位控逻辑入手，逐渐增加定时、计数等条件，把或、与、非关系理顺；
3、进而练习整数运算、实数运算、类型转换；
4、量程转换、PID调节回路的建立及P、I、D参数的理解（最好是有个物理回路验证，比如变频器+电机+测速传感器）；
5、循环、顺序、跳转等程序控制（尽量避免跳转，非跳不可时也是跳的越近越好）；
6、中断、通讯、位置控制....

本人以ABB工业机器人配件DSQC系列和Motorola MVME系列，GE 卡件 模块 驱动器系列为主攻。各位电工朋友可根据自己的条件选择适合自己的PLC品牌，由于PLC的基本框架大同小异，学会一种至于其它的学习起来也就简单了。

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