Hi all,

 Is It Possible to Move 2 axis at a time(closed loop) in S7-1200 by analog setpoint ? Like CNC in S7-1200 PLC is it possible to do circular interpolation? 

Short answer is no.  Longer answer is it depends.

You can move two axis at one time.  However, they are not synchronized, so they are essentially two independent motions.  There is also no virtual axis to coordinate a reference.

If you can tolerate Circleish but not a perfect circle, you can do the old school method of one axis runs a Sine function and one Axis runs a Cosine function.

I'm not sure that even the S7 1500 does circle interpolation, although I believe it does support multi-axis motions.  SIMOTION can do it using PATH commands.

Very true, a real motion controller would be the way to go.  As for accuracy, If the OP is using +-10V as a reference, the limitation would be the resolution of the DAC at the output.

It would be simple with SIMOTION. Essentially, you just tell it to make a circle.  If the OP is forced for whatever reason to only use a PLC, then the solution becomes far more complicated.

Hi all,

Thanks for Answers. 

 In my project the tolerance is high so we are not using SIMOTION or Motion Control Module. Planning to use  S7-1200 and Analog Drive and 2 external encoders(X & Y). Is there any example program for this kind of application Like Linear and Circular Interpolation?