Position Deviation Xerr in Telegram 105

Kataeb

Member
Join Date
Jan 2007
Location
www.livelovelebanon.com
Posts
628
In Profinet (or Profibus) communication between S7-1500T (or Simotion) controller and S120 () drives, and when working with DSC (Dynamic Servo Control) , they send the Position Deviation Xerr (in Telegram 105) from the plc to the drive . Then they add to it the Position Actual Xact inside the drive to have the Psetpoint again !
Why not they simply send the Position Setpoint from the controller to the drive ?
Can someone please explain this concept ?

control structure with DSC and with precontrol.JPG
 

Similar Topics

Hi All, I could do with some advice on a hydraulic control system. It is necessary for me to accurately position a vertical hydraulic ram with...
Replies
34
Views
1,709
Hello I am trying to make a program work with a sqo instruction .The process has 5 steps ,and a starting step of zero.There should be 8 sec...
Replies
17
Views
969
It's been a long time since I've had to think of P&ID tag nomenclature myself (and not gone along with some scheme devised by someone else). I've...
Replies
1
Views
184
Out of interest, I'd like some thoughts on what would be considered best practice with regards to a 2-position turntable control scheme (see...
Replies
17
Views
1,031
i need to create a 3 position selector switch, Auto, Manual and Sanitation. Can someone layout the steps in creating this task? I saw a thread on...
Replies
1
Views
468
Back
Top Bottom