Step 3: Active testing of the brake
In step 3, the brake is tested to verify whether it can hold the Test torque. The test torque is the sum of the applicative load torque during the brake test and the motor torque, which is set via the Torque specification parameter.
The brake is loaded with the Test torque for the set Individual test steps duration. The proportional motor torque builds up over the Duration of torque buildup and reduces again over the Duration of torque reduction. Possible movement of the machine is monitored during brake loading. A movement during active testing must be smaller than the sum of Permitted movement during idle state and Mechanical backlash of the respective brake.
The magnitude and direction of the actual torque supplied by the inverter is monitored. The recorded actual torque (arithmetic mean value) must be greater than the Torque specification minus the Tolerance torque specification of the respective brake.
If two brakes are to be tested, this test step is first carried out with the brake on the safe digital output F-DO00, the second brake on the safe digital output F-DO01 remains released. This test step is then repeated for the second brake, and the first brake remains released.
INFORMATION
- Depending on the direction of the test and load torque, the torque acting on the brake can be increased or reduced. The Load torque configured in the brake test must be adhered to whenever the brake test is performed.
- All torques relate to the motor shaft.
