logix5000 verify process ascii string against array?

Greetings,

I am currently working on a bit of code reset a work cell after a specific fault. It will be the scanning of a supervisors barcode to reset the fault in question.

My quandry: How to take the input ascii string from the barcode scanner and compare it to an ascii array of authorized supervisors in order to process the reset (without hundreds of compare blocks)?

5000 L63 version 13

Use a For/Next loop to index through the array one at a time. If the input string == that string of the current array position or if you reach the end of the array, exit the loop.

I understand the for/next loop, but what instruction do you use to analyze the next string in the array?

Fsc

In RSLogix 5000 there is an instruction FSC (File Search and Compare). This will do exactly what you want it to do. Just go to the online help and type in FSC to see the example of how to use it. One instance of the instruction will perform the function you are looking for.

Every time you loop through the For/Next loop you will increment the 'index' number by one.

You will use the same instruction as if you had a hundred separate instructions, but instead of addressing each element of your array directly like AuthorizedSupervisor[0], AuthorizedSupervisor[1], you will use AuthorizedSupervisor[index].



I agree the FSC seems like a better approach.

Thank You Gentlemen,

The FSC block seems like the cleanest execution.

Coop, I didn't know you could do [index]. Thanks for that.