Technical data

Technology objects
CPU 317T: Technology Functions
3-6 A5E00251798-03
3.1.5 Dynamic Servo Control (DSC)
The position of position-controlled axes (positioning and synchronization axes) can
be controlled either in the CPU or in the drive, provided the control method
Dynamic Servo Control (DSC) is supported.
DSC imposes the effective dynamic action of the position controller in the drive on
the frequency of the velocity control loop.
DSC allows you to set a higher K
v sampling rate. This increases the dynamic
response to sequential control variables and compensation of manipulated
variables in highly dynamic drives. DSC is supported by all drives which support
telegram 5 or 6, or 105 and 106.
DSC is only useful in P-action mode of the position controller.
Note
The position controller must be tuned, see chapter "Commissioning the position
controllers of positioning axes".
Position control loop without DSC
Structure of a position-control loop with the velocity setpoint interface to the drive
without DSC.
n
cmd : command speed Tpc : position controller sampling rate
x
cmd : command position kpc : position controller gain
x
act : actual position