MOTOROLA MVME712/M循环指令FOR 、NEXT
• FOR与NEXT指令总是成对使用的，FOR指
令应放在NEXT的前面。
• 如果执行FOR-NEXT循环的时间太长，应
注意扫描周期是否超出警戒时钟的设定时
间。6.比较指令CMP
• CMP指令：比较指令。
• 功能：将源操作数[S1．]和[S2．]代数比较，结果
送到目标操作数[D．]中。
• 编号：FNC10。
• 源操作数为[S1]和[S2]可取任意数据格式。
MOTOROLA MVME712/M 目标操作数[D]可取为Y、M、S等。功能：将源操
作数[S1．]和[S2．]代数比较，结果送到目标操作
数[D．]中。6.比较指令CMP
• 当动合触点X000接通
时，执行CMP指令。比
较指令将十进制常数100
与计数器C10的当前值比
较，比较结果送到
M0~M2。
• X000为OFF时不进行比
较，M0~M2的状态保持
不变。
• 如比较结果为
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