Siemens MICROMASTER 420 - Manual (Page 121)

Issue 07/04 3 Functions
MICROMASTER 420 Operating Instructions
6SE6400-5AA00-0BP0 121
NOTE
Motors have optional holding brakes which are not designed to be used as
brakes for normal operation. The holding brakes are only designed for a limited
number of emergency braking operations / motor revolutions with the brake
closed (refer to the Catalog data).
When commissioning a drive with integrated holding brake it is therefore
absolutely imperative that it is ensured that the holding brake functions
perfectly. A "clicking noise" in the motor indicates that the brake has been
correctly released.
WARNING
It is not sufficient to select the status signal r0052 bit 12 "Motor holding brake
active" in P0731 – P0733. In order to activate the motor holding brake, in
addition, parameter P1215 must also be set to 1.
If MICROMASTER controls the motor holding brake, then a series
commissioning (refer to Section 3.5.6) may not be carried-out for potentially
hazardous loads (e.g. suspended loads for crane applications) unless the load
has been secured. Potentially hazardous loads can be secured as follows
before series commissioning is started:
♦ Lower the load to the floor, or
♦ Clamp the load using the motor holding brake
(Caution: During the series commissioning, MICROMASTER must be
prevented from controlling the motor holding brake).