Dynamic Servo Control (Dsc, From Sw 4.1) - Siemens SIMODRIVE 611 universal Function Manual

01.99 02.02
6.14

Dynamic servo control (DSC, from SW 4.1)

Description The "dynamic servo control" ( DSC) is a closed–loop control structure
which is computed in a fast speed controller clock cycle and is supplied
with setpoints by the control in the position controller clock cycle.
This allows higher position controller gain factors to be achieved.
Requirement The following prerequisites are necessary to use dynamic servo control:
S
S
S
S
S
S
E Siemens AG 2005 All Rights Reserved
SIMODRIVE 611 universal Description of Functions (FBU) – 04.05 Edition
6.14 Dynamic servo control (DSC, from SW 4.1)
n–set mode
Isochronous PROFIBUS–DP
The position controller gain factor (KPC) and the system deviation
(XERR) must be included in the PROFIBUS–DP setpoint telegram
(refer to P0915)
The position actual value must be transferred to the master in the
actual value telegram of PROFIBUS–DP via the encoder interface
Gx_XIST1 (refer to Chapter 5.6.4)
When DSC is activated, the speed setpoint N_SOLL_B from the
PROFIBUS telegram is used as speed pre–control value
The internal quasi–position controller uses the position actual value
from the motor measuring system (G1_XIST1)
6 Description of the Functions
6-603
6