6 Commissioning

Issue 10/06

6.4.18.3Holding brake

¾Series / commissioning for hazardous loads

lower the load to the floor

when replacing the frequency inverter, prevent (inhibit) the frequency inverter from controlling the motor holding brake (MHB)

secure the load or inhibit the motor holding brake control (so that the brake cannot be controlled) and then – and only then – carry-out quick commissioning / parameter download using the PC-based tool (e.g.

STARTER, AOP)

¾Parameterize the weight equalization for hoisting gear applications

magnetizing time P0346 greater than zero

min. frequency P1080 should approximately correspond to the motor slip r0330 (P1080 r0330)

adapt the voltage boost to the load

a)V/f (P1300 = 0 ...3): P1310, P1311

b)SLVC (P1300 =20): P1610, P1611

¾It is not sufficient to just 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 be set to 1.

¾It is not permissible to use the motor holding brake as operating brake. The reason for this is that the brake is generally only dimensioned/designed for a limited number of emergency braking operations.

¾The brake closing / opening times can be taken from the appropriate manual. The following typical values have been taken from Motor Catalog M11 2003/2004, Page 2/51:

Motor size

Brake type

Opening time [ms]

Closing time [ms]

63

2LM8 005-1NAxx

25

56

71

2LM8 005-2NAxx

25

56

80

2LM8 010-3NAxx

26

70

90

2LM8 020-4NAxx

37

90

100

2LM8 040-5NAxx

43

140

112

2LM8 060-6NAxx

60

210

132

2LM8 100-7NAxx

50

270

160

2LM8 260-8NAxx

165

340

180

2LM8 315-0NAxx

152

410

200

2LM8 400-0NAxx

230

390

225

 

 

 

P1215 =...

Holding brake enable

0

Enables/disables holding brake function (MHB).

0Motor holding brake disabled

1Motor holding brake enabled

NOTE

The following must apply when controlling the brake relay via a digital output: P0731 = 52.C (= 52.12) (refer to Section 6.4.4 "Digital outputs (DOUT)").

56

MICROMASTER 440

Operating Instructions (Compact)

Page 56
Image 56
Siemens 440 operating instructions Motor size Brake type Opening time ms Closing time ms, Holding brake enable