Siemens CPU 943

BASP mostly point towards power suply to rack. It may be 24V or 5V. Somestimes any I/O module loose check for 24V supply.
This may help
 
Omar Gannameh said:
At any time even the machine is idle, our CPU 943 stops with a BASP fault.Anyone could help to solve my problem. Thanks in advance.

You need to go online with the PLC and look at the ISTACK to identify where in the program the fault occured. The BASP just indicates the outputs have been disabled after the CPU has stopped.
 

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