9/1/2015 2:02 PM | |
Posts: 2 Rating: (0) |
Dears, Processor: CPU 414-4H 1.CPU B failed on 17 Jul 2015 whose diagnostic buffer data is as in Diagnose-BMS A-CPU B-FAILED on 17 Jul 2015.txt 3.Hence replaced the CPU B with new one of the same firmware of 4.0.7 using the procedure as in Simatic Fault tolerant systems S7-400H system manual section 13.2.1 upto step 5. 4.It was observed that at step 5 of the manual,the new CPU B 's STOP LED which was blinking in orange color, stabilized. 5.There was no valid indication in the HMI. The plant had tripped. Both CPU 's MSTR LED was glowing. Synchronization module LED was not glowing in MSTR CPU A, but was glowing in the new replaced CPU B. Evidently there was some communication issue. Hence turned the power off for the CPUB rack. 6.Again all the indication in the HMI restored and were able to operate the faceplates. The diagnostic buffer which was collected after the failed attempt of new CPU B replacement is attached as in Diagnose-BMSA-31AUG2015-AFTER NEW CPU B RESTORATION FAILED.txt We would like to know, 1. Whether the sync module of the current online CPU A has failed. 2.The Memory card of the CPU B is failed. 3. The New CPU B processor is failed.
AttachmentCPU414-4H CPU B FAILED-REPLACEMENT UNSUCCCESSFUL.zip (256 Downloads) |
9/1/2015 2:44 PM | |
Posts: 2 Rating: (0) |
Yes the rack ID was set to 1 for the new CPU B. |
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