Lenze 8400 - Manual (Page 543)

Lenze · 8400 protec HighLine · Reference manual · DMS 3.0 EN · 03/2013 · TD05
543
8 Basic drive functions (MCK)
8.12 Holding brake control
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8.12.2.4 Application and release time
[8-34] Definition of the application and release time with the example of the PM brake

Tip!
The application and release times do not only vary between the brake types but also
depend on the basic conditions in the plant:
• Parameters of the hardware (cable length, temperature, level of supply voltage etc.)
• Contact elements used (brake module or contactor at the digital output)
• Type of overvoltage limitation/suppressor circuit
For optimisation purposes, detect in individual cases the response times by measurement.

Danger!
A wrong setting of the application and release time can cause a faulty control of the
brake!
• If the application time is set too low, the controller is inhibited and the drive becomes
torqueless before the brake is applied completely.
 C02589/1 : Application time
 C02589/2 : Release time
CINH = controller inhibit
• Every mechanical holding brake comes
with a construction-conditioned
application and release time which must
be considered by the holding brake control
and is set in C02589 .
• The application and release time of the
Lenze holding brake is indicated in the
supplied operating instructions in the
"Technical data" chapter.
• If the application and release times are too
long, this is uncritical in respect of safety
but leads to unnecessarily long delays
during cyclical braking processes.
t
t
Œ 
t
CINH
bBRKReleaseOut
I
BRK