Parker Products COMPAX-M /-S (L) manual P24 damping of drive, P56 D section rpm controller

Operating Instructions		COMPAX-M / -S
Optimization parameters
Main effect:	P23>100%	P23=100%
speed
reference
value,
actual
value		P23<100%

t

P24: damping of drive

Increase damping

Reduce damping

Main effect:

P56: D section rpm controller

P57: Lag D section rpm controller

P58: Lag rpm filter

P27: moment of inertia

Note:

Damping influences the height of the harmonies and reduces the vibrations. Nominal value: 100% Range: 0%...500%

Harmonies become smaller. The drive vibrates at high frequency from a specific value.

The harmonies of the actual value increase and it vibrates longer around the nominal value. The drive vibrates permanently from a specific value.

P24<100%

speed

reference P24>100% value,

actual P24=100% value

t

P56: D section rpm controller

Nominal value: 0 Range: 0%...500%

The D section should generally be set for elastically coupled double mass systems. These are systems in which the connection between the motor and the load is not rigid. It must be noted here, that with sufficiently high torques being transmitted, even supposedly rigid connections can become elastic.

P57: Lag D section rpm controller

Nominal value: 100%	Range: 0%...550%
P58: Lag rpm filter
Nominal value: 100%	Range: 0%...550%

Use this parameter to adapt the controller to very large changes in load.

Nominal value: 100% Range: 10%...500%

COMPAX is informed of the relative change in moment of inertia which occurs before a change in load when the motor is idle (e.g. via the RS232 interface).

The nominal value (100%) corresponds to the value calculated by parameters P81 to P92.

After changing P27, P23 usually needs modification P23 in order to achieve optimal control results.

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