Why does the S7-300 enter STOP mode when error 16#4548 “Stop by I/O administration” occurs?

2009-04-07View Original

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Description: The error status 16#4548 “Stop by I/O administration” occurs in the following situations: · The expansion rack cannot be recognized. · Due to the disconnection of the CP (loss of load power), the system bus ceases to function. Most accidental errors are caused by voltage fluctuations in the power supply of the interface module IM361 or the CP of the expansion device. The reason may be the switching operation of the output module, with the load of the output module being powered by the same voltage as that supplied to the IM module or the CP. This error appears when the CPU itself is not affected by voltage fluctuations, and as a result, it is not possible to diagnose this error. Remedial measure: The power supply for the output module is powered separately.

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Why does the S7-300 enter STOP mode when error 16#4548 “Stop by I/O administration” occurs?

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