
Firmware
≤
02.00 - DMS 2.1 EN - 03/2011
L
191
8400 motec | Software Manual
Basic functions
Holding brake control
8.2.4
Behaviour in case of pulse inhibit
Setting the pulse inhibit causes a load-controlled coasting of the motor until the pulse is
enabled again. In the enabled controller, the pulse can be inhibited e.g. due to a DC
overvoltage, DC undervoltage or the "Safe torque off" request.
The brake response to pulse inhibit can be parameterised under
Activate brake immediately when pulse is inhibited
If bit 1 in
is set to "0" (Lenze setting), the brake is controlled to be closed
immediately when a pulse inhibit is set.
Especially in the case of hoist drives, immediate engagement of the brake is absolutely
necessary for safety reasons if the pulse inhibit function of the drive controller has been
activated!
Only activate brake below threshold for brake activation
are set to "1", the brake remains released until the lower speed
threshold is reached in order to avoid an excessive wear of the brake.
The braking action only takes places due to the friction in the load mechanics.
Only when the motor speed has reached the threshold for brake activation, the brake
will be closed. Thus, the function depends on the signal of the speed sensor.
During uncritical operation (horizontal loading condition), delayed brake application may
be required to protect the brake in case of high centrifugal masses.
In case of vertical movement (bit 3 = 0), this function is not active due to safety-related
reasons.
Related topics:
Stop!
For parameterising the response to pulse inhibit under
, the energy
conditions of the machine should be evaluated first.
The energy stored in the machine can be considerably higher than the
permissible switching energy and thus lead to the destruction of the brake if
applied directly!
Note!
Function only possible if speed feedback via the digital input terminals DI1/DI2
is available.
Содержание 8400 motec Series
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