Hoist

Set the following parameters:

• Preload hoist (index 8404.9): This parameter determines the behavior of the integrator when re-entering control. Example: When the output stage is inhibited (e.g. with FCB 02, FCB 01, FCB 13, FCB 14), the I component (which corresponds to the preload in the case of the hoist) is deleted. The following selections are available to prevent this:
• "Off" (= default): The integrator always starts with the value "0". Adjustment is made to an existing load torque. The speed controller can usually compensate for sagging of the hoist without additional settings.
• "Save": The value that was present at the time of opening the speed control loop is retained. If the load torque has not changed, no adjustment is necessary when closing the speed control loop.
• "Initialization value": If the load torque is known, this can be specified on the speed controller as an initial value via the parameter "Torque bias" in the range -1000% to 1000% of the nominal motor torque. This can be done during startup or optimization of the drive with the MOVISUITE^® engineering software or you can use a local setpoint or a channel of the process data buffer. If the direction of rotation is positive in the stroke direction, enter a positive value and vice versa.
• Activate speed monitoring (index 8550.1). You must set the monitoring time (index 8550.2) for the specific application.
• For hoists without encoder, activate the stop by setpoint function (index 8570.1) and set it.