Servo control

3.15 Dynamic Servo Control (DSC)

3.15Dynamic Servo Control (DSC)

Description

The function 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.

The following prerequisites are necessary to use the "Dynamic Servo Control" function:

n-set mode

Isochronous PROFIBUS DP or PROFINET IO with IRT

The position controller gain factor (KPC) and the system deviation (XERR) must be included in the PROFIBUS-DP setpoint telegram or PROFINET IO with IRT (refer to P0915).

The position actual value must be transferred to the master in the actual value telegram of PROFIBUS-DP or PROFINET IO via the encoder interface Gx_XIST1.

When DSC is activated, the speed setpoint N_SOLL_B from the PROFIBUS DP or PROFINET IO with IRT 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) or the position actual value from the additional encoder system (telegrams 06, 106, 116 or free telegrams).

The following PROFIdrive telegrams support DSC:

Standard telegrams 5 and 6,

SIEMENS telegrams 105, 106 ,116.

Further PZD data telegram types can be used with the telegram extension. It must then be ensured that SERVO supports a maximum of 16 PZD setpoints and 19 PZD actual values.

Note

Synchronization is required on the control side and on the drive side for the operation of DSC.

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Drive Functions

Function Manual, (FH1), 07/2007 Edition, 6SL3097-2AB00-0BP4

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Efficient Networks S120 manual Servo control Dynamic Servo Control DSC