The Left(string,count) function can be used to determine the characters in a string, starting from the left side of the string and returning the characters based on the count in the function.
APPLICABLE PRODUCTS
Crimson 2.0
Crimson 3.0
Crimson 3.1
Crimson 3.2
ISSUE / QUESTION / SYMPTOM
How to use the Left(string,count) function in Crimson programming.
Use Case:
To determine the first three characters in a string tag starting from the left of the string.
String=the string of characters you want to extract the characters from. A string tag can be used or characters inside quotations ex:”Test1234”
Count=the number of characters to return from the extraction.
Application:
When you scan a barcode/input a long string of characters in a text box.
You can extract the characters from the left of the string to use as a verification to setup a machine.
Example Programming:
LeftStringExtract=Left(String,3);//This will extract the first three characters from the tag called string and put them in tag called LeftStringExtract
If the tag labeled String=ABCDEFG when this function is run, the characters that will show in tag LeftStringExtract will be ABC.
You can use this in other programming for example to choose setting for a machine.
Example:
LeftStringExtract=Left(String,3);
MachineSpindleLeft=0;
MachineSpindleRight=0;
if(LeftStringExtract == ”ABC”)
{MachineSpindleLeft=1;}
else if( LeftStringExtract != “ABC”)
{MachineSpindleRight=1;};
Explanation:
This function will extract the number of characters starting at the Left of the string and put them in a string tag.
POSSIBLE CAUSES / ANSWER
Using the Left() function can extract characters from a string tag or value starting from the left first character. It returns the number of characters in the count value.
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