M-Maxâ„¢ Series Adjustable Frequency Drive - Eaton Corporation
M-Maxâ„¢ Series Adjustable Frequency Drive - Eaton Corporation
M-Maxâ„¢ Series Adjustable Frequency Drive - Eaton Corporation
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Protective Functions, continued<br />
PNU ID<br />
Access<br />
RUN Value/Range Description<br />
P8.10 1430 X — Analog minimum reference error, reaction time 0.5<br />
0.0–10.0s (see parameter P8.1)<br />
P8.11 1473 — — (Not used) 0<br />
P8.12 714 — Underload low torque limit 60.0<br />
10–50% Motor torque<br />
The underload protection enables faults such as a torn drive belt<br />
or the dry running of a pump to be detected without any<br />
additional sensors<br />
The reaction to a detected underload can be set at P8.5<br />
The value set here determines the lowest permissible torque<br />
limit. This function can also be used with output frequencies<br />
that are above the cutoff frequency (P11.2, field weakening<br />
point)<br />
Note: The value set here is reset automatically to the factory<br />
setting (50.0%) if the parameter for the motor rated current<br />
(P7.1) is changed<br />
Underload Limit<br />
M ~ I<br />
P8.12<br />
P8.13<br />
5 Hz<br />
P8.13 715 — Underload, low torque limit at zero frequency 10.0<br />
5–150% Motor torque<br />
The value set here determines the lowest permissible torque<br />
limit at zero frequency (range 0–5 Hz)<br />
Note: The value set here is reset automatically to the factory<br />
setting (50.0%) if the parameter for the motor rated current<br />
(P7.1) is changed<br />
P11.2<br />
f<br />
Parameters<br />
Factory Setting<br />
(P1.3)<br />
M-Max <strong>Series</strong> <strong>Adjustable</strong> <strong>Frequency</strong> <strong>Drive</strong> MN04020003E—April 2011 www.eaton.com 91
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