Step 1: Moving clear

In step 1, the system availability for a brake test and the correct starting conditions are checked, e.g. the load torque setting. Errors in the overall system can be detected, e.g. a blocked mechanism or a brake that fails to release. Applicative effects on the result of the brake test are reduced.

A jerk time set in the inverter is not taken into consideration when moving clear. Moving clear takes place without jerk limitation.

Moving clear takes place in the following sub-steps:

• The drive moves to the set target position. The movement takes place in the set direction of movement. The target position is specified via the Track.
• The brake test calculates the expected duration of the movement and checks the actual movement, its direction and the duration required for it.
• After reaching the target position, the brake test waits for the duration of the set Waiting time. If position control is in operation, the drive remains in the target position. Then the next step is performed.
• The drive moves back in the opposite direction to 50% of the set target position. The movement takes place against the set direction of movement. The target position is specified via the Track.
• The brake test calculates the expected duration of the movement and checks the actual movement, its direction and the duration required for it.
• After reaching the target position, the brake test waits for the duration of the set Waiting time. If position control is in operation, the drive remains in the target position. Then the next step is performed.

During moving clear, all brakes are released via the brake control DB00 and via the safe digital outputs F-DO.. configured with function SBC.