5.3 Motor holding brake
A 24V / max. 2A holding brake in the motor can be controlled directly by the amplifier.
CAUTION
This function does not ensure functional safety! Danger by falling load (in
case of suspended load, vertical axes). An additional mechanical brake is
required for funktional safety, which must be safely operated, e.g. via the
Safety Card S1-2 (see p.155).
The brake only works with sufficient voltage level (ð p.30). Check voltage drop, measure
the voltage at brake input and check brake function (brake and no brake).
The brake function must be enabled through the BRAKE setting (screen page: Motor). In
the diagram below you can see the timing and functional relationships between the
ENABLE signal, speed setpoint, speed and braking force. All values can be adjusted with
parameters, the values in the diagram are default values.
During the internal ENABLE delay time of 100ms (DECDIS), the speed setpoint of the
servo amplifier is internally driven down along an adjustable ramp to 0V. The output for
the brake is switched on when the speed has reached 5 rpm (VELO), at the latest after 5s
(EMRGTO). The release delay time (t
brH
) and the engage delay time (t
brL
) of the holding
brake that is built into the motor are different for the various types of motor (see motor
manual), the matching data are loaded from the motor database when the motor is selec
-
ted. A description of the interface can be found on page 74.
32 S701x2-S724x2 Instructions Manual
Technical description 07/2014 Kollmorgen
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