AB电机MPL-B330P-SJ72AA

MPL-B330P-SJ72AA

应用程序的好坏，根本的一条就是正确。所谓正确的程序能经得起系统运行实践的考验，离开这一条对程序所做的评价都是没有意义的。

NO.2 程序的可靠性好

好的应用程序可以保证系统在正常和非正常（短时掉电再复电、某些被控量超标、某个环节有故障等）工作条件下都能可靠地运行，也能保证在出现非法操作（如按动或误触动了不该动作的按钮）等情况下不至于出现系统控制失误。

NO.3 参数的易调整性好

PLC控制的性之一就是灵活性好，容易通过修改程序或参数而改变系统的某些功能。例如，有的系统在情况下需要变动某些控制量的参数（如定时器或计数器的设定值等），在设计程序时考虑怎样编写才能易于修改。

NO.4 程序要简练

编写的程序应尽可能简练，减少程序的语句，一般可以减少程序扫描时间，提高PLC对输入信号的响应速度。当然，如果过多地使用那些执行时间较长的指令，有时虽然程序的语句较少，但是其执行时间也不短。

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