fawads

Hello experts

I have an array of type character that is present in a datablock DB48.The array contains 13 numbers , I want to compare this to a string constant . How can this be done . I tried using S_Comp instruction but it doesnt accept array of type character .

how can array of char type can be converted in to string or is there any other better way ?

I m using Siemens S7 . TIA portal v12

Thanks in advance

Dear fawads,


there are different approaches to solve your problem, one of them I've described in detail for you.

You can convert your array of characters to a stringand later on compare both strings. To do so, you first need to convert you array of chars to a string by using theAT keyword. Then definethe maximumand the actual length of your string.

I've attached a file which described my idea in a bit more detail.

Let me note, this might not be the best method, but by using this you will understand how strings are constructed and the connection between characters and strings.


Another thing you could do is convert your string to characters and compare character by character.

(And possibly other possibilities which my dear friends willcertainly mention.)

Hope this helps.


Kind regards,
Jens

fawads

Hello experts

I have an array of type character that is present in a datablock DB48.The array contains 13 numbers , I want to compare this to a string constant . How can this be done . I tried using S_Comp instruction but it doesnt accept array of type character .

how can array of char type can be converted in to string or is there any other better way ?

I m using Siemens S7 . TIA portal v12

Thanks in advance

Jens_app

Dear fawads,


there are different approaches to solve your problem, one of them I've described in detail for you.

You can convert your array of characters to a stringand later on compare both strings. To do so, you first need to convert you array of chars to a string by using theAT keyword. Then definethe maximumand the actual length of your string.

I've attached a file which described my idea in a bit more detail.

Let me note, this might not be the best method, but by using this you will understand how strings are constructed and the connection between characters and strings.


Another thing you could do is convert your string to characters and compare character by character.

(And possibly other possibilities which my dear friends willcertainly mention.)

Hope this helps.


Kind regards,
Jens

 Hi, your application is very nice. Could you make another PDF tutorial with "How to link the program you made with WinCC". I have to make something similar in WinCC. I will be thankful to you if you have the time to make a tutorial.

Best regards.