Siemens SIMATIC ET 200pro - Page 152

Setting functions
8.7 Application-specific functions
SIMATIC ET 200pro FC-2 converter
152 Operating Instructions, 04/2015, FW V4.7.3, A5E34257324B AB
7. If the load sags after switching on the motor, then you must increase the motor torque
when opening the motor holding brake. Depending on the control mode, you must set
different parameters:
– U/f operation (p1300 = 0 to 3):
Increase p1310 step-by-step.
Increase p1351 step-by-step.
– Vector control (p1300 ≥ 20):
Increase p1475 in small steps.
8. Switch off the motor.
9. Check the braking behavior of the drive immediately after the motor has been switched
off:
– If the brake closes too late, the load briefly sags before the brake closes.
In this case, increase the closing time p1217.
– After closing the brake, if the motor waits too long before it switches off the motor,
then reduce the closing time p1217.
You have commissioned the "Motor holding brake" function.
Table 8- 17 Setting the control logic of the motor holding brake
Parameter
Description
p1215 = 1
Enable motor holding brake
0 Motor holding brake locked (factory setting)
1 Motor holding brake just like the sequence control
2: Motor holding brake permanently open
3: Motor holding brake just like the sequential control, connected via BICO
p1216
Motor holding brake opening time
(factory setting 0.1 s)
p1216 > braking signal relay runtimes + brake release time
p1217
Motor holding brake closing time
(factory setting 0.1 s)
p1217 > braking signal relay runtimes + brake closing time
r0052.12
"Open motor holding brake" command
Table 8- 18 Advanced settings
Parameter
Description
p0346
Magnetizing time
(factory setting 0 s)
During this time the induction motor is magnetized. The inverter calculates this pa-
rameter using p0340 = 1 or 3.
p0855
Open motor holding brake (imperative) (factory setting 0)
p0858
Close motor holding brake (imperative) (factory setting 0)
p1226
Stationary state detection speed threshold
(factory setting 20 rpm)
When braking with OFF1 or OFF3, when the speed falls below this threshold, stand-
still is detected and the monitoring time p1227 or p1228 is started
p1227
Stationary state detection monitoring time (factory setting 300 s)
p1228
Pulse deletion delay time (factory setting 0.01 s)