MVME162PA-344E

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描述

MVME162PA-344E

这样变频器寄存器的地址就变成了运转时间415010千瓦时计数器415020功率416100,本来寄存器地址就不连续,读起来不方便,这回更是拆成了6个。唉,先编程再说吧。先编的是23台变频器224,编着编着发现编译保存时,输出窗口出现一个警告,说程序太大14000多字节,不适合224,当时就哭了。想想也是23台变频器,每台6条指令,再加上数值的处理,程序量很可观啊,怎么办,首先想到的是换226,付款订226,226在快递中的时候。想到了西门子的指针,想着把变频器的从站地址放入V区,再用指针去读取V区里的变频器的从站地址,读到地址23就返回到1,这样就6条读取指令,可大大减小程序块。可是指针我从来没用过啊,于是看指令方面的知识,看看发现从站地址是字节型,心想能不能每读完一台变频器的数据后,从站地址加1,就是字节型加上,发现STEP-7-MicroWIN没有字节整数型运算指令,无意中发现字节递增指令INC_B,这样就可实现每次地址加1。程序修改后大小为9400左右。
    下载后进行通信,使用的速率为115200,无法通信,又是什么原因?用计算机串口在RS485中继器网络2上检测不到数据,网络1连接的PLC,网络1上有数据。一共两个中继器,互换一下看看吧,还是不好用。说一个这两个中继器,一个是朋友的工程余货,一个是在淘宝上淘的二手(这里可以鄙视我一下)。两个中继器的接线,开关位置都没问题,就是通信不上,原因还是待查。大胆的将CPU通信直接连入网络2,发现PLC指令还是显示从站无响应,因为此时速率还是115200,全部改成9600试试吧,改成后全部都可以读取啦。非常高兴的说。现在速率运行在38400的速度上,轮询23台变频的总时间在8秒左右,只监不控可以了。
    话说这样就结束了吗,还没有。可以看上面变频出来的数据不适合上位机监视,所以要经过数据转换。我程序的形式是每次读取一台变频器的数据传出,再进行整体的数据转换,发现每次从地址23再地址1时全部变频的数据会向后串一台变频器,就是地址1的数据是地址23的,只是一个周期。心里这应该是程序中有些指令是多周期的导致数据还没转换完就读取下一台的数据了。接着改程序,改成每次读取的数据传出,再用sm0.0启用数据转换。不再有上述现象。

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15天包退换 一年质保 大量现货  国内实力库存商家


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。