Yes , we can use "WRITE_INPUT_INT"  EF for moving holding registers to input registers but considered the 3X register should not be mapped on IO module or somewhere in configuration to avoid any conflict .

Restrictions with WRITE_INPUT_INT:

• The function block provides access to one variable at a time (elementary data types and not arrays of elementary data types).
• Only variable addresses are allowed, you cannot use declared variables even if they are mapped on a %IW direct address.
• The simulation block WRITE_INPUT_INT does not work if the I/O module is configured in a RIO rack but works properly if the I/O module is configured in a local or DIO rack.

Released for: Schneider Electric India