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IEC 61131-3, Standardized functions

Created by: AutoGen_867742 at: 7/11/2024 5:04 PM (3 Replies)

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7/11/2024 5:04 PM	Rate (0)
AutoGen_867742 Member Joined: 4/28/2015 Last visit: 7/13/2024 Posts: 2 Rating: (0)	Hello, I am a trainer and I would like to present the programming of S7-1200 (TIA v19) PLCs as closely as possible to the IEC 61131-3 standard. I'm using this document [STEP 7 Standards compliance according to IEC 61131-3 (3rd Edition)] dated April 2015. I don't know if there is a more recent one? In this document, page 23, table 25. It is written that the normalized function ADD_TIME is available in LD and FBD. In TIA, the function is called T_ADD. Is it the same ? Attachment IEC_61131_compliance_en_US.pdf (346 Downloads)
	Last edited by: Wit_Moderator at: 07/12/2024 12:54:27 File attached from link
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7/12/2024 7:26 AM	Rate (0)
jacek d Platinum Member Joined: 9/23/2005 Last visit: 12/20/2024 Posts: 4828 Rating: (738)	I don't know if there's a newer compliance statement available. But for sure this one doesn't reflect current state.
	Regards, Jacek What is confusing you is the fact that you never see a number but always its digit representation. So you end up thinking that the number is the representation. - Andrej Bauer Any claims against me - based on whatever legal reason - resulting from the use of any code and/or ideas presented on this forum shall be excluded. #StayWithUkraine
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7/12/2024 8:15 AM	Rate (0)
AutoGen_867742 Member Joined: 4/28/2015 Last visit: 7/13/2024 Posts: 2 Rating: (0)	An other example The standard contains the mentions of CONCAT_DATE_TOD and CONCAT_DATE_LTOD. In the help : T_COMBINE: Combine times (S7-1200, S7-1500) « Note Use of T_COMBINE in SCL programs When you drag the instruction "T_COMBINE" from the "Instructions" task card to the SCL programming window, the internal instruction CONCAT_DATE_TOD or CONCAT_DATE_LTOD is displayed there. » Standard and TIA STEP 7 use different names.

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7/12/2024 5:57 PM	Rate (0)
0_Einstein Diamond Expert Joined: 7/7/2010 Last visit: 12/20/2024 Posts: 15527 Rating: (2461)	Be sure and enable IEC check for every created block in that case. It's a property for OBs/FCs/FBs (or attribute depending on your thoughts). Default is unchecked. AutoGen_867742 Hello, I am a trainer and I would like to present the programming of S7-1200 (TIA v19) PLCs as closely as possible to the IEC 61131-3 standard. I'm using this document [STEP 7 Standards compliance according to IEC 61131-3 (3rd Edition)] dated April 2015. I don't know if there is a more recent one? In this document, page 23, table 25. It is written that the normalized function ADD_TIME is available in LD and FBD. In TIA, the function is called T_ADD. Is it the same ?
	science guy
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