Hi Philip,
Apologies for not getting back to you on this.
Request(Hex Format)=010400000015EB15
Response(Hex Format)=010420435A999A00000000000000003E7EF9DB000000000000000041D80000000000002EEA
I got the 2368 bits by converting the HEX String to total bits.
I considered your suggestion by separating the each of the SCM 485 I/O per chart. It may indeed speed up the process.
Also on this postPost by OptoMary,that subroutine can be called at the same time by different chart.
Thank you everyone for your input on this query.
KNH