User Manual 08/2003 Edition

2
2 Installing and Connecting–up 02.99
2.2 Electrical system requirements
Withdrawing/
inserting the
connection cover
under voltage
i 2 t limiting
2-32
The connection cover can be withdrawn and inserted under voltage
with the motor stationary (OFF 1).
If the PROFIBUS terminating resistor is not switched in on this node,
i.e. if this drive is not the first or last node, then communications to the
other bus nodes is not interrupted.
Notice
When the connection is withdrawn, the actual position is not saved.
This means that the drive must be re–referenced after the cover has
been inserted.
This limiting function protects the positioning motor against permanent
overload.
If the positioning motor is operated for an excessive time over the
permissible load limit, then the available motor current is automatically
limited according to a characteristic.
I [A]
9
4.5
0
15
Warning
801 / P953.1 (refer to Chapter 6.2.2)
Fig. 2-7 i 2 t characteristic for the 75 W motor
21
10.5
I [A]
20
15
10
5
0
15
Warning
801 / P953.1 (refer to Chapter 6.2.2)
60
Fig. 2-8 i 2 t characteristic for the 300 W motor
not to scale
t [s]
not to scale
Warning
801 / P953.1 (refer to Chapter 6.2.2)
t [s]
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SIMODRIVE POSMO A User Manual (POS1) – 08.03 Edition