Hello i am into the programming of DIO 6509,I have problem in that programming.I have port 0/line0,port0/line1,port0/line2 as input signals..when give the input signal it passes through one IC and get me a signal at port0/line3. As i send the data to the following ports "port 0/line0,port0/line1,port0/line2 " i am getting the proper output in the IC pin(which is connected to port0/line3 measured using the DMM) but when i use the program to read the particular port-line the value its was there in following ports "port 0/line0,port0/line1,port0/line2 " goes off ..so iam not getting any output in port0/line3....if u have any solution for these please inform.