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Keep the FM 458 hardware position, PROFIBUS station data and SIMOLINK sequence together as one controlled configuration. Commission both communication paths before the controller is returned to operation.
Important Notice: An EXM 448-1 replacement is acceptable only after its complete 6DD1607-0EA1 marking and both configured networks have been verified.
Use the reference for EXM 448-1 identity and interface boundaries; use the commissioning guide to restore FM 458, PROFIBUS DP and SIMOLINK relationships in a controlled sequence.