ProControl gjr2310500r0001 st370c-e BBC st307e ST 370 E ABB

2711P-B12C4D8
PC832-001-T
2711-T10C8
6181P-15TPXP
1747-L551
PC-9821As/U7
1756-L73/A
3HAC14549-1/10A

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描述

本指令与ADD指令相似,是把两个四位BCD数作带借位减法,差值送入指定通道,其操作数同ADD指令。在编写SUB指令语言时,必须指定被减数,减数和差值的存放通道三个数

说明:执行减法运算前必须加一条清进位位指令CLC(41);被减数和减数必须是BCD数,否则25503置ON,不执行SUB指令;若运算结果有借位,则进位标志继电器25504为ON;若运算结果为零,则专用继电器25506变为ON。

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