8/27/2020 10:49 PM | |
Joined: 9/27/2006 Last visit: 7/14/2024 Posts: 12268 Rating: (2675)
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Hello balu; Since you are working with an uploaded program from a S7 CPU, it is difficult to give you a very exact reply. Uploaded programs have no symbols (Your function block parameters have names such as STAT 4) and your networks hold no explanatory comments. These exist only in the original program. However, this is the information I can provide. SFC 51 reads SSLs (system status lists) that contain information on the PLC ou are working with, such as you can see in the screenshot below. The screenshot was constructed from different pages from this manual: System and Standard functions for S7-300 and S7-400 https://support.industry.siemens.com/cs/ww/en/view/109751826 You are asking for SSL_ID w#16#B3, which is one diagnostic record of the CPU. Unfortunately for the calling conditions of your SFC 51 and the following instructions, I cannot even guess at what the original programmer was planning to do. Hope this helps, Daniel Chartier |
Last edited by: dchartier at: 08/27/2020 22:50:31 |
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