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Which Modbus functions are used for reading/writing multiple data on IO scanning in Modicon Quantum range.

In Modicon Quantum range, I/O scanning works with following Modbus function codes:
 
  1. FC3 for Reading Multiple 4X registers.
  2. FC16 for Writing Multiple 4X registers.
  3. If both the read and write are filled out then FC23 for Read/Write Multiple 4X registers is used.
FA21082  |  21-Dec-2012  | Programming
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