If we recieve NAk commnad during communication, firstly we need to check whether wiring has been done properly or not.If wiring is proper then we need to check the COm port of communcation is right or not and address is right or not.

To display the speed value(m/min or mm/sec) on MP5W connecting E50S8-100-3-T-24 to MP5W-42. 

We need to do following calculations:- 

In Parameter 1, we can see parameter MODE, in that set F1 mode.

Now for calculations, 
we have formula as,
Number of revolution(rpm)= 60*L/N
L= Length of conveyor moved for 1 pulse cycle,
N= Number of sensing target (number of pulse per revolution)
α= Prescale value

as per our encoder model & Pulley diameter,

α=60*200/100
α=120mm
These Value we need to set in Parameter 2,as "X" & "Y" in PSC.A.H & PSC.A.Y