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how to creat array

Created by: boazeventall at: 4/18/2012 5:02 PM (12 Replies)

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4/19/2012 2:37 PM	Rate (0)
Anchobi Posts: 139 Rating: (25)	boazeventall i want to create 10 inputs and if the person will like to change the size i will only need to change the number of the array Hi Boazevental Excuse me, I am a little rusty at doing tricky things on the S7 PLC I dont know what you are trying to do. But one way of making a variable sized array is using an ANY pointer. You may need to declare the any pointer in the temp memory of a FC and access its elements by directly addressing the local memory i.e %LB0 (be very careful the local memory offset does not change) An Excerpt from the TIA portal Help (look up ANY in the help "index" for complete detail) An ANY type parameter points to the start of a data area and specifies its length. -Data type:Data type of the elements of the data area -Repetition factorNumber of elements of the data area -DB numberData block that contains the declaration of data area elements. -Memory area:Memory area of the CPU that stores the data area elements. -Start address of the data in the format "byte.bit" So what you now have is complete control over access to a variable size block of I/O or memory or whatever you want. Again I am not sure what you are try to do or acheive, so i guess that you want variable memory block declaration. I am not sure how you want to use or access. If you can explain in more detail what you are trying to do it will help us find the solution for you.
Anchobi Posts: 139 Rating: (25)
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7/25/2016 4:29 PM	Rate (0)
Min_Moderator Platinum Member Joined: 9/3/2014 Last visit: 3/13/2019 Posts: 4766 Rating: (122)	New question published by manhar71 is split to a separate thread with the subject how to access DB based on 3d array field using dynamic array in LAD language. Best regards Min_Moderator

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7/26/2016 1:38 PM	Rate (1)
SMJE Silver Member Joined: 1/30/2006 Last visit: 9/16/2024 Posts: 310 Rating: (59)	Hi You can't create a dynamic Array. However you can create an array based on a constant. It's not possible to change anything during Runtime, but it gives som flexibility if you have to change several Arrays, Functions or FunctionBlocks. If you open the Default Tag table you must find the User Constants Panel. Add a ConstandName ie. MaxSize Type Integer and set it's value to ie. 100 Create a DB Create a Variabel of type Array. In Size of the Array set 0.."MaxSize" If you have to change the ArraySize later on, just change your constant and compile. Se Attachment for short example Attachment Screenshot - 26-07-2016 , 13_31_12.png (386 Downloads)
	Last edited by: SMJE at: 7/26/2016 1:38:32 PM BR. Sven
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