D to A conversion from a function block

[lamboom 7]

Thanks to much help from the Forum, I have a G5 servo motor wiggling back an' forth randomly in rotary mode.           

                           

 The position signal for that motion, is coming from the MC-SyncMoveAbsolute function block. (MC_Axis000)

  Is there a way to convert that signal to Analog , ideally +&- 10 VDC .. for analog output on I/O ?

Thanks, much,  Regards... Michael Lambert

[Michael Walsh 268]

Absolutely.  Lets say you were taking the analog signal to an NX-DA2603 which is a -10 to plus 10 signal with a range from 0 - 7999.  I believe that this means that 0 = -10 VDC, 3999 = 0 VDC and 7999 = 10 VDC.  Lets also say that CSine ranges from -100 to +100.  Then, you would simply write a bit of structured text to convert the from one to the other using the old slope-intercept equation.  For my example, it would look like this:

Then, simulating, I get the values that would be expected:

This could easily be turned into a function as well.  Of course you could calculate the slope and intercept using your calculator and then just put the constants in the structured text for each.