SINA_POS - Cannot get the 2nd motor enabled and runnig with a CU320-2 PN

Hello,

I cannot get the 2nd motor connected to a CU320-2 working  with SINA_POS !

I cannot enable it, jog it, etc.  I did exactly the same configuration (I think) for both motors.

I have the same problem if I try the 'BasicPosControl' technology object...

Should I use the same telegram number ? I try telegram 111  for both axis or 110 and 111, same problem... (Motor 2 is seen, if I move the shaft by hand, the encoder value changes but why is it impossible to get it enabled and running?)

Thank you

Dear Christoph

I'm using HW submodule 272 & 269

Hi,

first of all you definetely need to change the telegram 110 back to 111. 

SINA_POS only works with telegram 111!

And then: The variable SIDEA_Enable is not connected to the input of the SINA_POS Block for SIDEA?? Probably this is the simple reason why the axis is not switched on?!

Dear All,

Shame on me... yes, the EnableAxis was missing.... (it was there, in my mind...)

Thank you very much for pointing it !!

So, now, I'm finally able to Jog the 2 motors with this SINA_POS object library and go ahead in my project

Don't know which one is the best to use (vs. the TO BasisPos) ?

I will give a try again with the TO this evening

Thanks again,

Jerome

The SINA_POS FB and the TO_BasicPos is more or less the same. They both use the EPOS (Basic Positioner) function inside the drive and just give the control commands to the drive via the telegram

TO_BasicPos has just the following advantages in V17:

- you can assign the axis (drive) to the TO in a graphical mask instead of giving the HW ID at the FB input

- you can use physical units (like °, mm, µm, ...) within the PLC program (on the drive confiuration side you still have the LU settings) - the function block internally calculates from physical units to LU values and sends it to the drive

So if you already have your program running with SINA_POS FB it does not really make sense to switch over. 
A real difference in programming etc. would be to use the PLC's Technology Object for positioning so the motion intelligence is on the PLC side instead in the drive. Then you would use the PLC open blocks in your PLC program which is different to SINA_POS.