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Showing results for tags 'element name'.
Found 3 results
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Hello, I upgraded Panasonic FPWin Pro 7 to the latest edition and now the long element names do not wrap anymore! I do not see an option for it. Is there a trick now to get those long names to wrap like before? Thanks.
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Mapping to a Single Element in an Array
dmturner posted a topic in Allen Bradley / Rockwell Automation
I have 23 Micrologix 1400s and I want to take the same register, N100:99, out of each one and put in a single array in a CompactLogix L18ER. From what I have tried, it only seems like I can only map a range of integers, N100:77-N100:100, to the array and not an individual register to a particular element. (For example, mapping N100:99 from machine 16 to Selected_Model[15]) Can you map to individual elements in an array? If so, are there any instructions on how to do so? Thank you in advance for reading my post!- 2 replies
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- studio 5000
- rslogix 5000
- (and 5 more)
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How big is a sub-element ? (SLC/MicroLogix)
gazroo posted a topic in Allen Bradley / Rockwell Automation
Hi there, As a software engineer, but a newbie to the Allen-Bradley world, sorry if this question doesn't make sense. I'm enhancing an existing driver by trying to add the ability to read/write structured and array data types - rather than just the elementary data types it supports right now. This following question is only in the context of SLC/500 & MicroLogix 1400. And I'm currently working on a Counter as a test case, but any solution obviously needs to take into account other structured (and array) data types. One of the requirements is that the user should be able to select a specific atomic item within a parent structure/array that they want to read/write. So, using the Counter as an example, they might want to define a field which holds just the value of the accumulator. I know that I can achieve this with a CIP command. I specify file type 87 for counter, file number as 5 (my test example happens to be the standard C5 data file of counters), and element is 0 (for the first counter in C5). Bit number is irrelevant so remains as zero. I ask CIP to return me 2 bytes of data (to hold just the accumulator word). Finally, I tell CIP that I want sub-element 2 (because the accumulator is Word 2 of the whole structure). Sure enough, the CIP response gives me exactly the 2-byte accumulator value I was expecting, nothing more, nothing less. Success. My question is this: I knew I had to specify the sub-element as 2; this happens to work for a Counter because of the way it is structured as 3 words. However, it implies that the value I specify for sub-element is ALWAYS measured in units of 16-bit words. Is this a universal truth (i.e. works for other structured types too ?), or does the size of a sub-element depend on other factors, such as the file type ? Thank you in anticipation.- 1 reply
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- slc
- micrologix
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