6F3B0250
7. Instructions
FUN 070
SHR
n bit shift right
Expression
Input
Function
When the input is ON, the data of register A is shifted n bits to the right (LSB direction) including the carry flag (CF = S050), and stored in B. 0 is stored in upper n bits. After the operation, if the right most bit (LSB) is ON, the output is turned ON.
Execution condition
Input |
| Operation | Output | CF |
OFF | No execution | OFF | - | |
ON | Execution | When LSB = 1 | ON | Set or reset |
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| When LSB = 0 | OFF | Set or reset |
Operand
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| Constant | Index | ||
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| X | Y | R | S | T. | C. | XW | YW | RW | SW | T | C | D | I | J | K |
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A | Source |
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| Ö | Ö | Ö | Ö | Ö | Ö | Ö | Ö | Ö | Ö | Ö | Ö |
n | Shift bits |
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| 1 - 16 |
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B | Destination |
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| Ö | Ö | Ö | Ö | Ö | Ö | Ö | Ö | Ö |
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Example
When X007 is changed from OFF to ON, the data of RW18 is shifted 5 bits to the right and the result is stored in RW20.
The figure below shows an operation example.
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| (LSB) | ||||
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| F E D C B A 9 8 7 6 5 4 3 2 1 0 | |||||||||||||||||||||||||||||||||||||||||||||
RW18 |
| 0 | 1 | 0 | 0 | 0 |
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| 1 |
| 0 |
| 1 | 0 |
| 0 |
| 1 | 1 | 0 | 1 | 0 |
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RW20 0 0 0 0 0 0 1 0 0 0 0 1 0 1 0 0 (Result)
CF
1
0
R001 is turned OFF
184 T1/T1S User’s Manual
CTi Automation - Phone: 800.894.0412 - Fax: 208.368.0415 - Web: www.ctiautomation.net - Email: info@ctiautomation.net
