Comparing Strings in Step 7

Hi,

I will be scanning in a barcode. Here I will compare the scanned string against a table (DB) of known barcodes. Has anyone used FC10 EQ_STRNG in a looping situation?

How do I referance a data address of a string. (i.e. suppose there is a string of 8 char's in DB5. How do I address this string within DB5 using DB5.DXXX ?

One method is to copy the relevant entry from the table to a temporary string variable whilst looping - you will then be able to call FC10 with two string variables.

Here's an example project that uses FC10 in a loop. The strings are of length 8. The code has been run using plcsim.