Chapter 6 Applied Instruction API 1801 Symbol: S 1 ： Unit address Word S 2 ： Operation frequency of the AC motor drives Word n ： Mode Word 6-399 Instruction code Operand Function FWD S , S , n 1 2 The AC motor drive runs clockwise. Device X Y M S T C HC D L SM SR E PR K 16# “$” DF S 1 S 2 n Pulse instruction 16-bit instruction (7 steps) 32-bit instruction - AH500 -