則把0送至第2個(gè)字。如果-16位字中的最有效的位為-1(負(fù)),則傳送-1或十六進(jìn)制0FFFh至第2個(gè)字。如果低16位字(第-一個(gè)寄存器)是-DINT32位字的INT部分,則.把DINT轉(zhuǎn)換成INT就容易一些,高16位或第2個(gè)字應(yīng)是0(正)或-1(負(fù)),否則DINT數(shù)太.大不能轉(zhuǎn)換成16位。

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