Hitachi NJI-350B manual Application instructions-11, BCD shift left, BSL d, n

Chapter 5 Instruction Specifications

Item number

Application instructions-11

Name

BCD shift left

Ladder format

Condition code

Processing time (∝s)

Remark

R7F4

R7F3

R7F2

R7F1

R7F0

Average

Maximum

BSL (d, n)

DER

ERR

SD

V

C

Upper case: W

32



Lower case: DW

z

z

z

z

z

Instruction format

Number of steps

Condition

Steps

BSL (d, n)

3

39



Bit

Word

Double word

Constant

Usable I/O

Other

X

Y

M

CU, CT

WX

WY

WM

TC

DX

DY

DM

R,

TD, SS,

WR,

DR,

d

I/O to be shifted

{

{

{

{

{

n

Number of digits to be

{

{

{

{

{

The constant is set in

shifted

decimal.

Function

•Shifts the contents of d to the left (toward the upper digits) by n digits (one digit is equivalent to 4 bits).

•“0” is set from the least significant bit to the nth digit.

•The digits from the most significant bit to the nth digit are discarded.

BSL (d, n)

Before execution	n digits	d
Discarded

After execution

Most significant bit (MSB)

0000 0000 0 n digits

Least significant bit (LSB)

If d is a word:	Designates the shift amount, depending on the contents (0 to 3) of the lower 2 bits (b1, b0) of n (WX,
	WY, WR, WM, TC). (Upper bits are ignored and considered as “0.”)
	The n (constant) can be set to 0 to 3 (decimal).
If d is a double word:	Designates the shift amount, depending on the contents (0 to 7) of the lower 3 bits (b2 to b0) of n
	(WX, WY, WR, WM, TC). (Upper bits are ignored and considered as “0.”)
	The n (constant) can be set to 0 to 7 (decimal).

Notes

•If n is equal to “0,” the shifting is not performed.

Program example

X00001 DIF1			LD	X00001
	BSL	(WR0000 ,1 )	AND	DIF1
			[
			BSL	(WR0000 ,1)
			]

Program description

•When X00001 rises, the content of WR0000 is regarded as BCD code and shifted to the left by four bits. At this time, the data of the lower four bits are deleted and “0000” is set in the upper four bits.

		Before the shift				After the shift
H	1	2	3	4	H	2	3	4	0
Deleted	0001	0010	0011	0100		0010	0011	0100	0000
									Set to “0”

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