12/30/2019 1:01 PM | |
Joined: 9/27/2006 Last visit: 9/10/2024 Posts: 12282 Rating:
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Hello LongLe; Not only (as suggested by Legacy Support) must you be very sure that the failed S7-400H master CPU needs replacement, but the requirements for a replacement CPU are precise: you need a CPU of the same hardware and firmware version as the original (and the standby CPU that is now operating as a stand-alone PLC), and a similar memory card for both CPUs. Since the best information source for Siemens PLCs is always the System manual, look at the screnshot below, detailing the minimal conditions and procedure to replace a CPU in a S7-400H sytem: SIMATIC Fault-tolerant systems S7-400H (V6.0) https://support.industry.siemens.com/cs/us/en/view/82478488 Hope this helps, Daniel Chartier |
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