Is there a neater way to do this

[timmers]

I am revising some old code and was wondering if there was an easier way to do this

PARAM1 VAR WORD
PARAM2 VAR WORD
COMMAND VAR BYTE
TX_BUFF VAR BYTE [20]
LEN VAR BYTE

Old code

IF PARAM1.15 THEN
   PARAM1 = ABS PARAM1
   SerOut2 TX,6, ["SU ", #COMMAND, " -", #PARAM1]
ELSE
   SerOut2 TX,6, ["SU ", #COMMAND, " ", #PARAM1]
ENDIF

IF PARAM2.15 THEN
   PARAM2 = ABS PARAM2
   SerOut2 TX,6, [" -", #PARAM2]
ELSE
   SerOut2 TX,6, [" ", #PARAM2]
ENDIF

Same code but into an array so I can then send by using
HSEROUT [STR TX_BUFF\ LEN]

Is there an easy way to build the array and keep track of the length (LEN)

Thanks for looking,
Tim.