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 –
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 | 25 | 56 | |
71 | 2LM8 | 25 | 56 | |
80 | 2LM8 | 26 | 70 | |
90 | 2LM8 | 37 | 90 | |
100 | 2LM8 | 43 | 140 | |
112 | 2LM8 | 60 | 210 | |
132 | 2LM8 | 50 | 270 | |
160 | 2LM8 | 165 | 340 | |
180 | 2LM8 | 152 | 410 | |
200 | 2LM8 | 230 | 390 | |
225 | ||||
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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) |