Lenze 8400 motec - Manual (Page 274)

8 Basic functions
8.2 Holding brake control
274 Lenze · 8400 motec · Reference manual · DMS 4.1 EN · 08/2013 · TD05
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Related topics:
 Behaviour in case of pulse inhibit ( 281)
 Feedforward control of the motor before release ( 282)
8.2.1.4 Switching thresholds
Upper speed threshold for brake release:
Switching threshold (
C02581/1 ) + hysteresis for release ( C02581/2 )
Lower speed threshold for brake application:
Switching threshold (
C02581/1 ) - hysteresis for application ( C02581/3 )

Tip!
The lower speed threshold for brake application should be set to approximately 5 ... 20 % of
the maximum speed to minimise the wear of the brake and provide for an optimum brake
reaction by a low grinding of the brake.
Related topics:
 Process when brake is released ( 278)
 Process when brake is closed ( 279)

Stop!
Do not set the lower speed threshold for closing the brake too high to prevent excessive
wear of the brake!

Note!
When comparing speeds, only the absolute value of the motor speed and not the
direction of rotation is considered.
Avoid a conflict between the mechanical holding brake and the "
DC-injection braking "
function by setting the auto-DCB threshold ( C00019 ) to 0 rpm for DC-injection braking.