UserCurrentLimit

General

Type	EF
Offline editable	Yes
Devices supporting the parameter	Lexium LXM52 Drive, Lexium LXM52 Linear Drive, Lexium LXM62 Drive, Lexium LXM62 Linear Drive, Lexium ILM62 Drive Module, Sercos Drive
Traceable	Yes

Functional Description

The parameter is used to limit the reference current of the drive during motion jobs and is specified as percentage value relative to MaxDrivePeakCurrent. Modifications to the parameter UserCurrentLimit are passed on to the servo amplifier via the Sercos real-time channel.

WARNING
	UNINTENDED MOTION OF THE DRIVE Do not use the parameter UserCurrentLimit if the drive might collide with an obstacle and UserDefinedStopMode is parameterized with actual values. Failure to follow these instructions can result in death, serious injury, or equipment damage.

The UserCurrentLimit parameter only refers to the torque producing current of the drive. The magnetizing current is not limited with this parameter (for more information, see Current parameter).

By an emergency stop that was caused because of

a detected error in the own drive or
switching off ControllerEnable,

this limitation is not active. This means that in these cases the drive is shutdown max. with MaxDrivePeakCurrent.

NOTE: The parameter value is transferred from the master to the slave via the real-time channel of the Sercos. Modifications to the parameter can be applied every Sercos cycle.

This parameter has no effect for asynchronous motors in open-loop V / f mode (ControlMode = open-loop control / 1).

The following graphic shows the dependency with other object parameters for rotary drives:

The following graphic shows the dependency with other object parameters for linear drives:

Example:

Entering J_Load has a direct impact on the parameter MaxAcc. A revision of MaxAcc only has an impact on ControllerStopDec if,

a Sercos phase up takes place or
the parameter ControllerStopDec is modified.