Connection of the Components
5.12 Brake Control
Guide for the SINUMERIK 840D sl machine configuring
Manual, 07/2006 Edition, 6FC5397-6CP10-0BA0
5-77
5.12 5.12 Brake Control
For the brake control, a differentiation is made between:
● Conventional brake control and
● Safe brake control
The control command to open or close the holding brake is transferred directly to the Motor
Module over the DRIVE-CLiQ from the Control Unit that logically links and monitors the
signals with the system-internal execution sequences. The Motor Module then performs the
action and controls the output for the holding brake appropriately.
Conventional brake control
The exact execution control is described in the SINAMICS S [2701…2704] Parameter
Manual. For example, the p1215, p1219, p1224 and p0855 parameters can be used to
configure the operation of the holding brake.
The control (open/close) of the holding brake is differentiated as follows:
● Open the holding brake after pulse enable (e.g. using ON/OFF1).
● Immediate close of the holding brake after a successful pulse suppression (e.g. using
ON/OFF2)
The brake acts immediately after pulse suppression. It is possible that the holding brake
operates against any motion that occurs. In the long term, this will damage the holding
brake. Consequently, the direct pulse suppression and closing of the holding brake
should be avoided.
● Close the holding brake only after braking with pulse suppression (e.g. using
ON/OFF1=1->0)
The holding brake acts when the motor has been brought to a standstill. The pulse
suppression results after a deceleration time.
● Unconditional opening of the holding brake using the execution control command and the
p0855 parameter.
Note
For the selection/deselection of the brake, any pending pulse enable will not be further
influenced. The unconditional opening of the holding brake, for example, can lead to
dangerous motions for hanging axes. Additional safety measures may need to be
adopted.
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