Functions
7.9 Technological functions
Inverter with CU240B-2 and CU240E-2 Control Units
Operating Instructions, 07/2010, FW 4.3.2, A5E02299792B AA
201
Commissioning
WARNING
The following applications require special settings of the motor holding brake. In these
cases, the motor holding brake control may only be commissioned by experienced
personnel:
All applications that involve moving and transporting people
Hoisting gear
Elevators
Cranes
● Before commissioning, secure any dangerous loads (e.g. loads on inclined conveyors)
● Suppress the motor holding brake control, e.g. by disconnecting the control cables
● When opening the motor holding brake, ensure that a torque is established that prevents
the load from briefly dropping.
– Check the magnetizing time P0346; the magnetizing time is pre-assigned when
commissioning the system and must be greater than zero
– V/f control (P1300 = 0 to 3):
Set the boost parameters P1310 and P1311.
Define the motor torque when switching on using P1351 and P1352.
– Vector control (P1300 ≥ 20):
Define the motor torque when switching on using P1475.
● Assigning parameters for the opening and closing times of the motor holding brake.
It is extremely important that electromechanical brakes are controlled with the correct
timing in order to protect the brakes against long-term damage. The exact values can be
found in the technical data of the connected brake. Typical values:
– Depending on the brake size, brake opening times lie between 25 ms and 500 ms.
– Depending on the brake size, brake closing times lie between 15 ms and 300 ms.
● Reestablish the control of the motor holding brake.
r0052.12 ("Motor holding brake open") controls the brake.
When a motor with a built-in holding brake is commissioned, a "clicking" sound in the motor
indicates that the brake has been properly released.