VR10AscToSBy
V = Variables
R = Reading functions
ASCII —→ SIGNED BYTE
The VR10AscToSBy function converts an Ascii variable type in an Signed Byte type (byte with sign).
IMPLEMENTATION
VR10AscToSBy (array, index, return, errcode)
Parameters:
| IN/OUT | VARIABLE TYPE | EXAMPLE NAME | DIM | |
|---|---|---|---|---|
| IN | ARRGBL | array | B | Array containing the data to be converted (must be declared with at least “index + 1” items) |
| IN | GLOBAL | index | L | Index of the array element at the beginning of the data |
| OUT | GLOBAL | return | B | Data value converted |
| OUT | GLOBAL | errcode | F | Variable that indicates a possible error on function |
Errcode
After calling the function, 'errcode' can take certain values, the meaning of these values is summarized below:
0: No error
1: Error: ASCII value is not within 48÷57 or 65÷70
Example
Transforms the value -5 (ASCII) in an signed byte value
index = 1 array[1] = 49 array[2] = 52 VR10AscToSBy (array, index, return, errcode) ;On the return data you will find : ; return = 20 (14H)