Superimposed Motion

So here is what I would like to know if there is someway to accomplish.  I would like with a S7-1200 to initiate a "MoveVelocity" command on an axis and then say at some time later, superimpose on this move a MoveIncremental or MoveAbsolute command.  Think about it this way, the axis is moving in time with a clock, and then a move is made while keeping it in time with the clock.

Now I think this could be down with the 1511T/1515T as it has a MC_MoveSuperImposed command, but I don't need or want the cost as compared to a 1214 or 1215.  Is this something that I might be able to write a custom FB/FC for?  Anyone have any ideas?

Your thoughts are appreciated....

 Hello.

mrphysics

So here is what I would like to know if there is someway to accomplish.  I would like with a S7-1200 to initiate a "MoveVelocity" command on an axis and then say at some time later, superimpose on this move a MoveIncremental or MoveAbsolute command.  Think about it this way, the axis is moving in time with a clock, and then a move is made while keeping it in time with the clock.

Now I think this could be down with the 1511T/1515T as it has a MC_MoveSuperImposed command, but I don't need or want the cost as compared to a 1214 or 1215.  Is this something that I might be able to write a custom FB/FC for?  Anyone have any ideas?

Your thoughts are appreciated....

The task is possible. See the attachment - study the right hand side of the timing graph.

For this example, two absolute move blocks are used. The same can be done with a high absolute move target set.

Your idea will also work where the first absolute move block is a velocity motion instead.

BR