Rockwell Automation 1769-SM2 Compact I/O DSI/Modbus Communication Module - Manual (Page 122)

7-20 CompactLogix Example Ladder Programs
A “17486” equates to Parameter 78 (17486 - 17408 = 78), since 17408 is
Instance 0 in the drive (17409 is Parameter 1). For additional information
about the message setup, refer to
page 5-3 .
Write Message (Rung 17)
A “17486” equates to Parameter 78 (17486 - 17408 = 78), since 17408 is
Instance 0 in the drive (17409 is Parameter 1). For additional information
about the message setup, refer to
page 5-3 .