Artesis AMT Toolkit - Page 29

AMU Use
27
Load threshold %
Used by the phase ordering algorithm to set the
loading threshold. If the ratio of actual current to
nominal current is more than the value of the Load
threshold (in %) then the motor is considered to be
working under load and the appropriate phase ordering
selected. Otherwise, the motor is assumed to be
unloaded.
Run Settings
Learn iterations
The number of data acquisition iterations required for a
LEARN period. A value between 15 – 30 is
recommended.
Improve
iterations
The number of data acquisition iterations required for
the IMPROVE phase. A value between 7 – 10 is
recommended.
Update
iterations
The number of data acquisition iterations required for
an UPDATE phase. A value between 1000 - 2000 is
recommended.
Flash update
rate
AMU does not update the flash with new values at
each iteration, as this could shorten the flash lifetime.
On the other hand, the longer data are stored in
volatile memory, the greater the potential for data loss
if power fails. As a compromise, the user can set a
suitable time (measured in complete iterations) after
which all outstanding data are automatically saved to
flash.
Local lockout
When this setting is on, passwords have to be supplied
in order to start or quit a Check Motor or Monitor
mode. Its purpose is to prevent any unauthorized
tampering with AMU. Remote commands over the
serial line are unaffected.
Relay thresholds
Set the fault level for activating the output relay in
MONITOR mode. If set, the relay is triggered by a
change from a lower to a higher fault level any time the
level is equal to or above the set level.
Current stability
%
When obtaining data, AMU requires relatively
unchanging current signals. If the variation in the
amplitude of the current exceeds this threshold, AMU
will reject the data. The alarm UNSTABLE LINE is often
seen when the current stability is set too low.