8/28/2020 7:20 AM | |
Joined: 3/30/2020 Last visit: 9/23/2024 Posts: 4782 Rating: (982) |
This is a user's forum. My point of view is less aggressive as it sounds. I suggest you contact Siemens Support with your query. Even better if you go through your local Siemens contact. With Siemens' official response as base, it would be more easy (opinion) for users to fill in blanks and debate the case. Best to mention the industry segment the query targets. |
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8/28/2020 4:32 PM | |
Joined: 3/25/2008 Last visit: 1/28/2022 Posts: 232 Rating: (20) |
Hello, i really do not expect some one on this forum will issue a certificate for my system. What i will like to know, is if some one else has handled this kind of situation before, and perhaps know how the requirement was meet. In the other hand i also will like to know more about on how Simatic plattaform meets the IEC61131 points mentioned in the original post. Thanks. |
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8/28/2020 5:20 PM | |
Joined: 9/27/2006 Last visit: 9/22/2024 Posts: 12282 Rating: (2685) |
Hello Tebanch; Siemens has provided a compliance table of S7 programming wth IEC 61131-3, based on its 2003 version,and a compliance certificate for the standard: - IEC 61131-3 and SIMATIC S7 https://support.industry.siemens.com/cs/ww/en/view/8790932 - General Product Approval, Manufacturer declartion, Manufacturer https://support.industry.siemens.com/cs/ww/en/view/109476748 You can download the IEC 61131-3 2003-01, 2nd edition, as a pdf in this link, for example: INTERNATIONAL STANDARD IEC 61131-3 https://d1.amobbs.com/bbs_upload782111/files_31/ourdev_569653.pdf Note that S7 CPUs are not in complete compliance with the newer edition 3, 2013, of the standard.as uyou can see in the following discussion: STEP-7 -- IEC61131-3 Certification Hope this helps, Daniel Chartier |
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9/11/2020 5:52 PM | |
Joined: 3/25/2008 Last visit: 1/28/2022 Posts: 232 Rating: (20) |
Hello, i finally got an answer from tech support team, they send me the certificate for S7-300 CPUS, but unfortunately it is not very explicit. So there is a certificate for the CPUs but still it is not clear for me which mechanisms in S7300 CPUs are available for the user to check internal memory integrity and data consistency. (Please find attached the CPUs certificate, may be helpfull for other users ) So i guess i will re-elaborate my questions to the followings: 1. Wich SFC/SFB/OB do you recommend me to use/review in order to try to detect CPU memory issues? 2. Do you konow about which are possibble message/error codes in diagnostic buffer that i should lookup for CPU memory errors? 3. Can you recommend any (Simatic or third part) software tool that may be used to check memory and data inegrity in S/300 CPUs? Any help or comment on this will be very much appreciated. Thanks. Attachments7_300_v11_2013_d_e.pdf (251 Downloads) |
Last edited by: TEBANCH at: 09/11/2020 17:53:45Keep working! |
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9/11/2020 9:47 PM | |
Joined: 9/27/2006 Last visit: 9/22/2024 Posts: 12282 Rating: (2685) |
Hello Tebanch; The certificate provides little apparent information when read alone, but examine it in parallel with the IEC 61131-3 part 2 standard (for example, there are others mentionned in the certifcate document that I am less familiar with) and you can understand which tests need to be passed by the PLCs listed in the certificate document. Here is a link to a 2007 version of the standard: http://read.pudn.com/downloads523/ebook/2171018/IEC%2061131-2.pdf Look at the screenshot below to see the description of the selt-tests and diagnostics section of the PLC memory that the document certifies the S7-300 CPUs have passed in order to be certified..There are many more types of test required before the certificate can be applied to all the standards it is linked to. In the case of the S7-300, this means that the S7-300 CPUs have: - a hardware or software means to check the memory integrity... and - a means to monitor the status of MPU. In S7-300 CPUs, this type of system evaluation is done through the operating system of the CPU, and results in alarming through the diagnostic LEDs of the CPU or various modules, along with the diagnostic buffer logging all error states and failure events. There is nothing that works faster or more reliably in the CPU than its internal hard-coded operating system programs for self diagnostics. And from experience they are very credible. You will receive warning of memory loss or discrepancies, of loss of backplane exchanges with modules, and in case of total memory dysfunction all the LEDs on the CPU will warn you by blinking together continuously. I do not believe there are any system functions that can be used to evaluate the state of the memory of your CPU, and error codes will appear in the diagnostic buffer when events are detected. The certificate you received basically assures you of the reliability of the automatin system you are working with. Hope this helps, Daniel Chartier |
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