Nord Drivesystems SK 180E Series, User Manual

Page: 141 / 212

5 Parameter
BU 0180 en-4118 141
A warning C12.5 is always given after the elapse of half of the set error triggering time (P528).
This also applies if a mode is selected for which no fault message is generated. If only a
maximum or minimum value is to be monitored, the other limit must be deactivated or must
remain deactivated. The torque current and no the calculated torque is used as the reference
value. This has the advantage that monitoring in the "non field weakened range" without servo
mode is usually more accurate. Naturally however, it cannot display more than the physical
torque in the weakened field range.
All parameters depend on parameter sets. No differentiation is made between motor and
generator torque, therefore the value of the torque is considered. As well as this, there is no
differentiation between "left" and "right" running. The monitoring is therefore independent of the
prefix of the frequency. There are four different load monitoring modes (P529).
The frequencies, and the minimum and maximum values belong together within the various array
elements. The frequencies do not need to be sorted according to their magnitude in the elements
0, 1 and 2, as the frequency inverter does this automatically.
P533
Factor I 2 t-Motor
(Factor I 2 t- Motor)
S
50 ... 150 %
{ 100 } The motor current for the I 2 t motor monitoring P535 can be weighted with the parameter P533.
Larger factors permit larger currents.
P534
[-01]
[-02]
Torque disconn. limit
(Torque disconnection limit)
S P
0 ... 400 % / 401
{ all 401 }
Via this parameter both the drive [-01] and the generator [-02] switch-off value can be adjusted.
If 80% of the set value is reached, a warning status is set. At 100% switch-off is performed with
an error message.
Error 12.1 is given on exceeding the drive switch-off limit and 12.2on exceeding the generator
switch-off limit.
[01] = drive switch-off limit [02] = generator switch-off limit
401 = OFF means that this function has been disabled.