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Type |
EF |
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Offline editable |
Yes |
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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 |
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.
NOTE: If the current has been limited with UserCurrentLimit in normal operation and the drive has been stopped mechanically and has been pushed out if its defined path, an acceleration of the drive can occur when triggering UserDefinedStop in the Start with reference values mode. This acceleration is caused by disabling UserCurrentLimit during the UserDefinedStop start-up if the drive with the higher current is able to follow the defined reference value course again.
In this case, use the Start with actual values mode or the reconfiguration to a different reaction (for example, reaction BD1 BestPossibleStop).
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|
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UNINTENDED MOTION OF THE DRIVE |
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Do not use the parameter UserCurrentLimit if the drive might collide with an obstacle and UserDefinedStopMode is parameterized with actual values. |
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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
oa detected error in the own drive or
oswitching 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 indicates the dependency with other object parameters for rotary drives:
The following graphic indicates the dependency with other object parameters for linear drives:
Yellow parameters are input parameters, whose values are taken into account by the Sercos phase up. Green parameters are input parameters, whose values are taken into account immediately. Gray parameters are output parameters. Thick arrows show that a parameter makes an impact on another parameter immediately by the input. Thin arrows show that a parameter does not have an impact until the next Sercos phase up or when the dependent parameter is entered. The arrow indicates the effective direction of the dependency.
Example:
Entering J_Load has a direct impact on the parameter MaxAcc. A revision of MaxAcc only has an impact on ControllerStopDec if,
oa Sercos phase up takes place or
othe parameter ControllerStopDec is modified.
