4/29/2016 12:00 PM | |||||||||||||||||||
Joined: 7/2/2008 Last visit: 8/26/2024 Posts: 928 Rating:
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Hello gqhuang, I truly understand your situation (Same complaint from few of my customers). I'm not a PCS7 expert but there's a possibility to use FLASH memory as long as you don't have 410CPU. You will have to accept the fact that online modifications are not possible without STOP.
Clarification: The PCS7 is mainly a DCS. The main target is processes that work 24/7/365 and may require frequent change. It should be a piece of cake to add a PID loop for example in few minutes and download without disturbing operation because STOP for a change in such applications is not acceptable at all. I understand that marine applications do not require frequent change. So, it should be no problem if you use FLASH memory as long as you don't have the latest 410 CPU. For CPUs V6.X (e.g. 6ES7414-5HM06-0AB0) the load memory is expandable with FLASH.
While for the new 410 CPU (which is going to be the core of PCS7), you can't use FLASH as the load memory is not expandable at all.
Best regards, H-H |
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4/29/2016 10:38 PM | |
Joined: 9/7/2007 Last visit: 8/30/2023 Posts: 550 Rating:
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Hi gqhuang I totally agree with your request and I also accepts H-H reply,but I have some concerns on your case: 1) As you mentioned that there is a critical S7-400H system running with PCS7 so there is at least 4 back-up batteries (the installed Power supply must be at least 10Amp. * 2 which requires 2 batteries in each one) 2) For a PCS7 project there is a self test from time to time, regarding the back-up batteries, if there is any faulty battery from the four installed batteries you will get an error message on the workstation. 3) you need at least 1 back-up battery healthy to change the other faulty batteries. 4) For a marine offshore rigs there must be well trained specialist that knows essentials of this critical system, how to keep it alive without losing control. |
Best Regards |
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This contribution was helpful to
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11/10/2017 8:57 AM | |
Joined: 9/27/2017 Last visit: 11/30/2022 Posts: 1 Rating:
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With Firmware v8.2 of CPU 410-5H all load memory became ROM. You also can load changes. You can update CPU just via install new FW version. See there: https://support.industry.siemens.com/cs/ww/en/view/109476571 |
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