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Old June 18th, 2021, 01:36 PM   #1
James Mcquade
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Help with Beckoff PLC

Hi all,
i'm now working full time for a company that has a few Beckoff plc's.
i have links to training material, but i have a question.
Allen Bradley has a format scheme for their systems: B3,T4,C5, and so on.

My question is, where can i find this information for Beckoff and what is the address ranges?
any help and links to information is much appreciated.
thanks in advance,
James
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Old June 18th, 2021, 05:17 PM   #2
kolyur
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Tag addressing in Beckhoff works more similar to RSLogix 5000 than the older SLC/Micro formats you mentioned. When you create variables, it generally isn't necessary to specify an address... the compiler does it automatically and it is invisible to the user. The one main exception with Beckhoff is that if you want a variable to be linked with I/O, you have to put it in the correct address space, which means typing either %I* or %Q* in the address spot. You do have to assign a datatype to every variable, like BOOL, INT, DINT, etc.

Here's a good series of TwinCAT 3 tutorials that explains a lot of this:
http://www.contactandcoil.com/twincat-3-tutorial/
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Last edited by kolyur; June 18th, 2021 at 05:27 PM.
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Old June 19th, 2021, 08:50 AM   #3
James Mcquade
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thank you for your reply,

we also have twincat2 programs also.
so there is no mapping scheme for beckoff plc's?
i am looking at one of our programs and i see the variable declarations
variable name AT %IX201.0 and then the comment of the input.
if i am correct, we get the %IX201.0 from the electrical print.
is that true?
thanks in advance,
james
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