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STEP 7 / STEP 7 Lite

fifo buffer and block move

Thread Starter: playerslight Started: 4/27/2012 7:44 PM Replies: 10

4/27/2012, 7:44 PM

playerslight

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I created a udt of the data that i need to move in a fifo buffer 25 words time 20 occurences . I want to use a loop in stl to move the data but i can figure out how to indirect address the move parameters or if it is even possible .this is going in a data collector (s7-400) and willl recieve data from approx 150 plc'sand the most effiennt way is indirect addressing and run loops .s o any ideas will help

Thank you in advanca

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Steve

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4/27/2012, 9:22 PM

IBN-Service

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Build a pointer to supply SFC20 is very easy,
do you need an example?

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4/27/2012, 9:37 PM

playerslight

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I can do the pointer as i had it working last night for 1 block move What i was trying to do is loop through the 20 calls . all data is in 1 data block instead of calling the blockmove 20 time i wanted to loop it . so what i need to do is use a temp variable for the datablock and a temp variable for the pointer so i can make function called by a loop for the 150 different data blocks and 20 udts in each function .i did have working using load and transfer but with 20 elements for 5 element but for 20 the function is just to big and had to follow and prone to mistakes

=== Edited by playerslight @ 4/28/2012 12:32 AM [GMT ] ===

=== Edited by playerslight @ 4/27/2012 9:40 PM [GMT ] ===

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Steve

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4/27/2012, 9:59 PM

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playerslight wrote:

... so what i need to do is use a temp variable for the datablock and a temp variable for the pointer ...

Have a look at the attached example.

=== Edited by IBN-Service @ 4/28/2012 8:46 AM [GMT ] ===
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Thank you for this post from:

SudhirS, playerslight

4/28/2012, 12:19 AM

playerslight

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Thank you very much that is perfect I will try it tonight and let you know

=== Edited by playerslight @ 4/28/2012 12:20 AM [GMT ] ===

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Steve

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4/28/2012, 8:33 AM

playerslight

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Works great and again thank you Rnf:lblSmileyTooltip_

Regards

Steve

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they are really good for nothing
but they still bring a smile to your
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Thank you for this post from:

IBN-Service

4/28/2012, 8:37 AM

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playerslight wrote: