Operating instructions

Functions
5.10 Technological functions
CU240S and CU240E Control Units, FW 3.2
Operating Instructions, 03/2009, A5E02440075B AA
137
P0346
t
t
t
t
t
212))
0
1
OFF2
U%LW
I
PLQ
3
3
I
Brake Release Time
Brake Closing Time
Motor excitation
finished
Open
Closed
Inaktiv
Active
U%LW
%UDNH
6WDWXV
Figure 5-13 Function diagram, motor holding brake after an OFF2 command
Commissioning the control logic of a motor holding brake
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
1. Before commissioning, secure any dangerous loads (e.g. loads on inclined conveyor
belts)
2. Suppress the motor holding brake control, e.g. by disconnecting the control cables
3. 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
– For V/f operation (P1300 = 0 to 3), set the boost parameters P1310, P1311.