L9_MUL: Multiply

Naming

Name in LL984 Editor	Function Block Name
name of legacy 984 instruction	name in other tools and editors like: Type Library Browser Data Editor Animation Tables Search Results

Function Description

The L9_MUL procedure multiplies unsigned VALUE1 by unsigned VALUE2, and then posts the RESULT in 2 contiguous words.

The multiply operation begins when the input to the ENABLE pin is turned ON. The OUT output turns ON upon the successful completion of the operation.

Formula

RESULT = VALUE1 × VALUE2

Representation

Parameters

Input Pin	Name	Data Type	Address Range	Meaning
Top	ENABLE	BOOL	–	OFF to ON initiates the operation.

Node	Node	Name	Data Type	Address Range	Meaning
Top	IN	VALUE1	UINT	%IW, %MW	The multiplicand. Can be displayed as an integer constant, can be stored in a variable located in a %IW input word or a %MW memory word, or can be in an unlocated word. Valid range: 0 to 65,535.
Middle	IN	VALUE2	UINT	%IW, %MW	The multiplier. Can be displayed as an integer constant, or can be stored in a variable located in a %IW input word, a %MW memory word or an unlocated word. Valid range: 0 to 65,535.
Bottom	IN/OUT	RESULT	ArrUINT2	%MW	The product. The first word stores the four high-order digits of the product, and the second word stored the low-order digits of the product. For example: if the product is 16000, the first word holds a value of 1 and the second word holds a value of 6000. Must be located in 2 %MW memory words or 2 unlocated UINT words.

Output Pin	Name	Data Type	Address Range	Meaning
Top	OUT	BOOL	–	ON indicates the multiplication operation succeeded. (Echoes the status of the ENABLE input).