V90 PN - TO data exchange with absolute encoder

Hello,

I wonder what are correct parameters to set in Technology Object TIA V13 SP1 for data exchange with absolute encoder (steps per resolution and fine resolution settings), when using standard telegram 3 with servo drive V90 absolute multi-turn encoder.

Where is possible to find this data?

Thank you.

Yes I am working with S7-1511 with TIA V13, V90 PN is connected via profinet using standard telegram 3.

In the configuration of TO in the tab Data exchange with encoder:

I selected Encoder type Rotary absolute, and the other data is set by default, but I am not sure if this data corresponds with the S-1FL6 motor with 20bit absolute encoder.

I made some test and it was working OK until I restart the drive, then the absolute position is lost. Every time I restart the system (PLC and drive V90), the absolute position is lost. I also make homing, and the position "TO".StatusSensor[1].AbsEncoderOffset is set and also TO.Homed bit is 1. This status and value still remains after restart, but the actual position is lost, every time after reset the actual position is something near 0.

I suspect, that parameters Data exchange with encoder are not correct. I don,t know where to find this technical data?

Thank you.

Regards

Uros

I think you have to check encoder type data in Motor plate data and parameter p29244(Absolute encoder virtual rotary revolutions)

This paramter Description: Sets the number of rotations that can be resolved for an encoder with activated position tracking function (p29243 = 1).

and also refer to V90PN manual.

https://support.industry.siemens.com/cs/ww/en/view/109742518

I hope this is supposed to be solution..

If you do the referencing with the referencing button in the V-assistant and save to rom, the referencing and position is kept after power failure...

any other methode failed me

Seems to be necessary ( when drive is used in Speed not in EPOS ) put in a high state bit 13 of G1_STW ( encoder command word ).

Hello,

I hope I don't brake any forum rules but here is a tutorial with video that might help you:

http://tiaportalhowto.com/en/blog/how-to-configure-technology-object-positioning-axis/

It has absolute encoder configuration shown in it.