DVD Player User Manual

Issue 07/04 3 Functions

MICROMASTER 420 Operating Instructions

6SE6400-5AA00-0BP0

119

3.13 Motor holding brake (MHB)

Parameter range: P1215

P0346, P1216, P1217, P1080

r0052 bit 12

Warnings -

Faults -

Function chart number: -

For drives which must be secured when powered-down to prevent them

undesirably moving, the MICROMASTER brake sequence control (enabled via

P1215) can be used to control the motor holding brake.

Before opening the brake, the pulse inhibit must be removed and a current

impressed which keeps the drive in that particular position. In this case, the

impressed current is defined by the min. frequency P1080. A typical value in this

case is the rated motor slip r0330. In order to protect the motor holding brake from

continuous damage, the motor may only continue to move after the brake has been

released (brake release times lie between 35 ms and 500 ms). This delay must be

taken into account in parameter P1216 "Holding brake release delay" (refer to Fig.

3-48).

fmin

(P1080)

P1217P1216

OFF1/OFF3

ON / OFF1/OFF3:

r0052.C

Point 2Point 1

P0346

Motor excitation

finished

r0056 Bit04

Fig. 3-48 Motor holding brake after ON / OFF1