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Which System Word in SoMachine basic can I use to indicate an I/O card is present or missing?

Published date: 30 October 2019

%SW120 Expansion I/O module status.
Bit 0: Reserved for the logic controller
  • 0 = Module is present and no error detected
  • 1 = Module not present or error detected.  The I/O expansion bus does not start unless the corresponding bit in %SW119 is set to TRUE (indicating the module is marked as optional). 


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