Correcting MBPoll bug

(temp change on trial basis to get first function up and running)

First let us try to get one function running, Once it is done, remaining should be a couple of day's job. 
Try only following function in grid1 (refer to the mail sent).

(ID = 255, F = 03, SR = 1000, Address = 0, Quantity = 100) 

Thank you.