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Find an Item Within an array

Created by: Omer Ron at: 5/19/2014 6:12 PM (5 Replies)

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5/19/2014 6:12 PM	Rate (0)
Omer Ron Posts: 64 Rating: (2)	Hello, I'm a newbie to the Simatic HW/SW. Is there a tool/command in STEP-7 to find anitem in an array, or is it something I need to build? For example, I have an array of string and I'm looking for "glass". I Want to know the first index of the array that matches. Thanks
Omer Ron Posts: 64 Rating: (2)
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5/19/2014 6:15 PM	Rate (0)
0_Einstein Diamond Expert Joined: 7/7/2010 Last visit: 2/7/2023 Posts: 13084 Rating: (2125)	Omer Ron Hello, I'm a newbie to the Simatic HW/SW. Is there a tool/command in STEP-7 to find anitem in an array, or is it something I need to build? For example, I have an array of string and I'm looking for "glass". I Want to know the first index of the array that matches. Thanks You will want to build that search. I would suggest SCL as it is much easier to loop through an array with an index variable than doing it in ladder.
	science guy
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5/19/2014 6:25 PM	Rate (1)
hdhosseini Diamond Expert Joined: 1/28/2009 Last visit: 12/28/2022 Posts: 6785 Rating: (1336)	Omer Ron Hello, I'm a newbie to the Simatic HW/SW. Is there a tool/command in STEP-7 to find anitem in an array, or is it something I need to build? For example, I have an array of string and I'm looking for "glass". I Want to know the first index of the array that matches. Thanks For S7-300/400 ,I also suggest the following clustered topics: Searching Patterns in DBs-Compare DBs
	Demo Channel on Youtube
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5/19/2014 8:23 PM	Rate (2)
Jens_app Gold Member Joined: 1/5/2011 Last visit: 2/7/2023 Posts: 810 Rating: (118)	Omer Ron Hello, I'm a newbie to the Simatic HW/SW. Is there a tool/command in STEP-7 to find anitem in an array, or is it something I need to build? For example, I have an array of string and I'm looking for "glass". I Want to know the first index of the array that matches. Thanks Hi Omer Ron, Like said before, you can easily achieve your goal using the program language SCL. Once you have mastered the basics I'd advice you to create a function that loops true your array, comparing each individual component with the string you are looking for, let the function return an index number that refers to the component of the array that matches the string you are looking for. take a look at the program language SCL : https://support.automation.siemens.com/WW/llisapi.dll?query=SCL&func=cslib.cssearch&content=adsearch%2Fadsearch.aspx&lang=en&siteid=cseus&objaction=cssearch&searchinprim=&nodeid99= Here's a sample code for once you've mastered the basics: FUNCTION "FC_FindString" : Void VAR_INPUT StringLookup : String; // 'String to look for END_VAR VAR_OUTPUT StringIndex : Int; // 'Returns the position of the string inside the array ReadyIndication : Bool; // 'Indicates if the function is done searching and the result is reliable END_VAR VAR_TEMP loop : Int; END_VAR BEGIN FOR #loop := 0 TO 10 DO // loop from 0 to 10 by +1 IF #StringLookup ="DB_FindString".StringContainer[#loop] THEN // compare string you are looking for with strings in array if they match then execute following #StringIndex := #loop; // return index value (location inside array of matching string) #ReadyIndication := 1; // set ready to one, indicate that match is found RETURN; // exit function ELSE // if nothing matches then #StringIndex := 9999; // set stringindex to 9999 #ReadyIndication := 0; // set ready to false, indicate that no match is found END_IF; END_FOR; END_FUNCTION I hope you choose to learn SCL and that my example helps. Kind regards, Jens
	Last edited by: Jens_app at: 5/19/2014 8:24 PM layout bug using [code] (removed) Keep it simple and on-topic. A simple straight-to-the-point answer is often of more quality than a complicated one.
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5/19/2014 8:26 PM	Rate (0)
Madhava Silver Member Joined: 11/26/2011 Last visit: 12/7/2022 Posts: 508 Rating: (20)	There is no such tool available . But you can easily write the search code in SCL.

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12/16/2019 8:18 AM	Rate (0)
AutoGen_8147733 Regular Member Joined: 9/24/2019 Last visit: 12/13/2022 Posts: 2 Rating: (0)	I'm pretty late but in case anyone finds this topic: perhaps the TBL_FIND function (FC86) will be useful... https://support.industry.siemens.com/cs/ww/en/view/16792091
	Last edited by: Jen_Moderator at: 12/16/2019 13:21:05 Optimized link.
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