Brake test (700, 701, 702)
INFORMATION
The operating mode is available when using the MOVIKIT® StackerCrane MultiMotion and MOVIKIT® StackerCrane MultiAxisController. To use the function with MOVIKIT® StackerCrane MultiAxisController Torque, the option "With FCB 01 release brake/deactivate DynaStop® – enable" must be activated in the "Functions" > "Drive functions" > "FCB 01 Output stage inhibit" configuration menu. The MOVIKIT® MultiAxisController addon Cascading is not supported by the operating mode.
Testing the function and performance of up to 2 brakes using the inverter function "FCB 21 brake test". The inverter function loads the closed brake(s) separately with a torque (static) that can be set in the "Drive functions" > FCB 21 Brake test configuration menu of the inverter according to the application requirements. The test result "OK" (passed) and "NOK" (failed) and optionally other measured values are available as feedback for each brake via the fieldbus interface.
For information on determining the correct torque for the brake test and the permissible movement during testing, refer to the project planning manuals for BK.., BZ.., BR.., BY.., BZ.. brakes and BE.. brakes.
An application-specific load torque should be taken into account in the torque specification by the user specifying a value for it. Alternatively, if the load is not constant during operation, FCB 21 can determine the current load situation itself.
The inverter drive function "FCB 21 Brake test" works with drive train 1 (DT1). An encoder feedback (motor encoder or distance encoder) that matches the required VFCPLUS, CFC or servo control mode is required. When executing the FCB 21 brake test for testing a brake, the brake control is integrated via DB 0/DB 00.
When executing the FCB 21 brake test to test two brakes, the two brakes will be tested separately. This requires additional wiring for separate control of the two brakes. System examples 3 and 4 show the additional relays K1 and K2 required during brake control DB 0/DB 00. When FCB 21 brake test is active, the two relays K1 and K2 are switched alternately by FCB 21. This applies the brake to be tested while the other brake remains released. The wiring of the brake control DB 0/DB 00 must be routed to relays K1 and K2 via NC contacts (low-active).
Relays K1 and K2 are controlled by FCB 21 via control signals. These can be freely assigned, e.g. to process input data, digital outputs or I/O extension of the inverter. SEW‑EURODRIVE recommends using the digital outputs of the inverter or the I/O extension.
Assign the following signals of FCB 21 to the required digital outputs:
- For brake 1 (DOx in the example): "FCB 21 Brake test – apply brake 1"
- For brake 2 (DOY in the example): "FCB 21 Brake test – apply brake 2"
For more information on configuring digital inputs/outputs, refer to chapter Digital inputs/outputs.
