Yaskawa VS-616G5 Modbus Plus Communication Card - Manual (Page 114)

Data Registers A-34
Special Registers (Write only)
REGISTER FUNCTION DATA DESCRIPTION
(in hex) SET
F200 Global Write Enable Global Write Source Address (0=disabled)
F201 Global Frequency Reference Multiplier Multiplies global freq. reference before being written to drive (1000 = 1.000 multiplier)
FFDDh ‘ACCEPT’ Command 0 Writes data into Volatile memory
FFFDh ‘ENTER’ Command 0 Writes data into Non-Volatile memory