Lenze 8400 motec - Manual (Page 275)

Lenze · 8400 motec · Reference manual · DMS 4.1 EN · 08/2013 · TD05 275
8 Basic functions
8.2 Holding brake control
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
8.2.1.5 Application and release time
[8-1] Chronological sequence of the brake output signal

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 (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