Delta-electronics Extension Digital I/O Module DOP-EXIO14RAE Manual de usuario descargar pdf (Pagina 132)

Appendix D Use of Application Instructions|DOP-EXIO Series

Revision March, 2008, Doc. Name: 2007PDD23000014 D-51

Mnemonic Operands Function

SFTR

Bit Shift Right

Bit Devices Word Devices

X Y M S K H KnX KnY KnM KnS T C D E F

   

  

 

y Note:

1. Range of n

: 1~ 1,024

2. Range of n

: 1~ n

16-bit instruction (9 Steps)

SFTR

Continuous

execution

32-bit instruction

- - - -

y Flags: None

Operands:

: Start No. of the shifted device

: Start No. of the device to be shifted

: Length of data to be shifted

: Number of bits to be shifted in 1 shift

Explanations:

This instruction shifts the bit device of n

bits (desired length for shifted register) starting from D to the

right for

bits. S is shifted into D for n

bits to supplement empty bits.

Program Example:

When X0 = Off→On, M0 ~M15 will form 16 bits and shifts to the right (4 bits as a group). The figure

below illustrates the right shift of the bits in one scan.

n M3 ~ M0 → carry

o M7 ~ M4 → M3 ~ M0

p M11 ~ M8 → M7 ~ M4

q M15 ~ M12 → M11 ~ M8

r X3 ~ X0 → M15 ~ M12 completed

SFTR X0 M0 K16 K4

X3 X2 X1 X0

M15 M14 M13 M12 M11 M10 M9 M8 M7 M6 M5 M4 M3 M2 M1 M0

1234

carry

4 bits as a group shifting to the right

1 2 ... 127 128 129 130 131 132 133 134 135 136 137 ... 156 157

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Delta-electronics Extension Digital I/O Module DOP-EXIO14RAE Manual de usuario Pagina 132

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