Simulating a REAL value

I'm simulated a few different styles of dosing with my rslogix5000 emulator and a wonderware application I made for it. Everything works great and I'm about to display the dosing and all the functions but I have to manually enter the GPM value in the program ( obviously because there isn't a flow sensor, its just a simulation)..

Anyone have a good way of simulating my values to change and bounce around from the 4.00 - 8.00 GPM range.. I guess I could figure it out doing a lot of computation instructions but I figured there has to be an easier way? I basically don't want it to stay at a steady flow rate because I'm testing my deviation displays and a few other things. Plus it looks more realistic. Muchas gracias

I would create a sine wave generator in your logic that you can reference. The forums have some examples such as:

http://www.plctalk.net/qanda/showthread.php?t=98682&highlight=sine+wave

Personally I have added sine wave functionality to all my analog input AOI blocks. Helps when testing and simulating the process, but also helps ensure my trending and historian data are being tested as well.

Paully's5.0 said:

I would create a sine wave generator in your logic that you can reference. The forums have some examples such as:

http://www.plctalk.net/qanda/showthread.php?t=98682&highlight=sine+wave

Personally I have added sine wave functionality to all my analog input AOI blocks. Helps when testing and simulating the process, but also helps ensure my trending and historian data are being tested as well.

Click to expand...

After playing around with the instruction I was able to randomize numbers every second in the 4.00 - 8.00ish range I was looking for. Thanks for the lead.