Hi 

We have an Servomotor with sinamics S120 servo drive. that connected to a S7-1500 PLC by Profinet.

The application is Perforating of lable films with special length and print mark references.

I connected print mark to the S120 and I want to use it to stop the film in same position in each cycle Perforating it and move again to next step.

Perforating motor has a separate mechanism that goes up and down.

How can I use the print mark that I connected to drive input to receive to accurate stopping in same positions. Is there any simple solution.

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Split from Distance between Marks using Sinamics S120 CU320 2 DP.

Hello,

I see more possibilities with the basic positioner.

1.) Using direct the homing procedure. There you can start the axis and after detection of the digital input you can define a position where the axis come to standstill

2.) mode MDI: start with jogging and activated passive homing. After detection of digital input change to  absolute positioning with a defined position setpoint (that is more flexible than variant 1).

Or do you use the Technology Object from the S7-1500?

Best regards

  Zako

 Hello Zako,

Thank you very much.

I connected registration mark sensor to one of the fast inputs of S120 drive directly and I can see it on the PLC by using the last word of telegram 111 for CU I/Os.

in every cycle I am reading the position of registration mark sensor and compare it with previous position to find error for compensation by adding or reducing to target position value in the PLC Program.

But I have around 1-3mm swing in load position and it is not acceptable and we need maximum 0.5mm.

our drives were connected by Profinet to PLC. can it be because of delay time in PLC / Drive communication on Profinet?

Is there any more accurate solution. our application is Perforating of films.

Regards

Kevin

zako_

Hello,

 

I see more possibilities with the basic positioner.

1.) Using direct the homing procedure. There you can start the axis and after detection of the digital input you can define a position where the axis come to standstill

 

2.) mode MDI: start with jogging and activated passive homing. After detection of digital input change to  absolute positioning with a defined position setpoint (that is more flexible than variant 1).

 

Or do you use the Technology Object from the S7-1500?

 

Best regards

  Zako

Hello,

do you compare r2521? Then you have deviation because of cycle times in PLC / communication / time slice on drive.

You have to use the r2523. If you want to do an evaluation in the PLC, you can use a telegram extension, or a new slot for "supplementary data".

Best regards

  Zako

 Zako,

Could you please explain a little more that how can I use r2523 , while I am using telegram 111 and SINA_POS [FB284] Function in the PLC?

Regards

Keyvan

zako_

Hello,

 

do you compare r2521? Then you have deviation because of cycle times in PLC / communication / time slice on drive.

You have to use the r2523. If you want to do an evaluation in the PLC, you can use a telegram extension, or a new slot for "supplementary data".

 

Best regards

  Zako