6F3B0250
7. Instructions
FUN 069
SHL1
1 bit shift left
Expression
Input
Function
When the input is ON, the data of register A is shifted 1 bit to the left (MSB direction). 0 is stored in the right most bit (LSB). The pushed out bit state is stored in the carry flag (CF = S050). After the operation, if the left most bit (MSB) is ON, the output is turned ON.
Execution condition
Input |
| Operation | Output | CF |
OFF | No execution | OFF | - | |
ON | Execution | When MSB = 1 | ON | Set or reset |
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| When MSB = 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 | Operation data |
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| Ö | Ö | Ö | Ö | Ö | Ö | Ö | Ö | Ö |
| Ö |
Example
When X008 is changed from OFF to ON, the data of RW15 is shifted 1 bit to the left. The figure below shows an operation example.
CF 1
(MSB) |
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| F E D C B A 9 8 7 6 5 4 3 2 1 0 |
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| 1 |
| 1 | 1 | 0 | 0 | 1 | 1 | 1 | 0 | 0 | 1 | 1 | 1 | 0 | 1 |
| 0 |
| RW15 | ||
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| RW15 (Result) | ||
| 1 |
| 1 | 0 | 0 | 1 | 1 | 1 | 0 | 0 | 1 | 1 | 1 | 0 | 1 | 0 |
| 0 |
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| R002 is turned ON |
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| 0 |
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Basic Hardware and Function 183
CTi Automation - Phone: 800.894.0412 - Fax: 208.368.0415 - Web: www.ctiautomation.net - Email: info@ctiautomation.net
