
Functions
5.10 Technological functions
Frequency inverter
136
Operating Instructions, 08.10. 2008, t.b.d.
Timing of the motor holding brake after an OFF2 or STO command
Contrary to a standard motor holding brake, after an OFF2 command, the brake is
immediately closed. The normal timing sequence of the motor holding brake function is
interrupted by the following signals, without taking into account the brake closing time:
●
OFF2 command, or
●
For fail-safe applications, in addition, after "Safe Torque Off" (STO)
P0346
t
t
t
t
t
212))
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 5-11 Function diagram, motor holding brake after an OFF2 command