Operating Instructions

Siemens Application Siemens Industry, Inc. • 81
24-hour support [phone] (Dial 2)
3
Response to external fault (P3.9.2)
An alarm message or a fault action and message is generated by an external fault external fault signal
in one of the programmable digital inputs (DI3 by default) using parameters P3.5.1.7 and P3.5.1.8. The
information can also be programmed into any of the relay outputs.
Motor thermal zero speed cooling (P3.9.8)
Defines the cooling factor at zero speed in relation to the point where the motor is running at nominal
speed without external cooling. See Table 39.
The default value is set assuming that there is no external fan cooling the motor. If an external fan is
used this parameter can be set to 90% (or even higher).
If you change the parameter P3.1.1.4 (Motor nominal current), this parameter is automatically restored
to the default value.
Setting this parameter does not affect the maximum output current of the drive which is determined by
parameter P3.1.1.7 alone.
The corner frequency for the thermal protection is 70% of the motor nominal frequency (P3.1.1.2).
Figure 22. Motor thermal current I
T
curve.
24 Reserved
25 PID1 supervision limits PID1 feedback value is beyond supervision limits.
26 PID2 supervision limits PID2 feedback value is beyond supervision limits.
27 Motor 1 control Contactor control for Multi-pump function
28 Motor 2 control Contactor control for Multi-pump function
29 Motor 3 control Contactor control for Multi-pump function
30 Motor 4 control Contactor control for Multi-pump function
31 Reserved (Always open)
32 Reserved (Always open)
33 Reserved (Always open)
34 Maintenance warning
35 Maintenance fault
Table 56. Output signals via RO1.
Selection Selection name Description
f
f
n
Par.
P3.9.8=40%
0
11098.emf
I
T
100%
Over load area
P
cool ing
Cor ner freq