9/9/2015 7:05 AM | |
Joined: 1/28/2009 Last visit: 9/10/2024 Posts: 6849 Rating: (1365)
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Hello, Hi i have a S7-400F-H, redundant CPU's but when i try to download some changes ( making a new FB's or change some FB) the CPU goes stop. It's not possible to download a configuration without stop the CPU's with a Redundants CPU? I think that i don't have idea to make it because this is so expensive CPU to don't mek it. First of all , there is required list of OBs to present in the CPU to avoid entering CPU in STOP Mode.I think you can the list in the Fault-tolerant system manual.The other point, changing structure of FBs and then updating the IDB may cause read/write access error or cause unpredictable result in a running machine.It is recommended to download such a case when your machine is out of service.If the required error OBs present, changing structure of FBs and updating and downloading them to system may not lead to a CPU entering in STOP mode. The most serious case in this position would be excessive cycle time if you developed your program in a wrong basis. If your system is working continuously (ESD/F&G and safety systems) , it is wise to modify the system in major shutdowns .In this case, you need to consider spare parameters in your FB beforehand to avoid risk of structure change.A complete range of possible changes during runtime is listed in section 17 (System modifications during operation) Fault-tolerant system manual for both STEP 7/PCS 7.
I hope this helps, hdhosseini |
Last edited by: hdhosseini at: 9/9/2015 7:10:51 AM |
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10/22/2015 1:44 PM | |
Joined: 9/3/2014 Last visit: 3/13/2019 Posts: 4767 Rating: (123) |
New question published by SmartPlant is split to a separate thread with the subject Download the entire program(CFC) to S7-400H redundant system, without CPU stop. Best regards |
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