Honeywell SmartVFD HVAC MR4, Руководство пользователя

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HVAC A
PPLICATION
Honeywell
• 34
3.5.3.2 Motor Control Settings
Table 23. Advanced motor settings
Code Parameter Min Max Unit Default ID Description
M3.1.2.1 Switching frequency 1.5 Varies kHz Varies 601
Motor noise can be mini-
mised using a high switch-
ing frequency. Increasing
the switching frequency
reduces the capacity of the
drive. It is recommended to
use a lower frequency when
the motor cable is long in
order to minimize capaci-
tive currents in the cable.
M3.1.2.3 Motor preheat function 0 3 0 1225
0 = Not used
1 = Always in stop state
2 = Controlled by DI
3 = Temperature limit (heat-
sink)
NOTE:
Virtual digital input
can be activated by RTC
M3.1.2.4
Motor preheat temper-
ature limit
-20 80 °C 0 1226
Motor preheat is switched
on when the heatsink tem-
perature goes below this
level (if par. M3.1.2.3 is set
to
Temperature limit
.
If limit is e.g. 10°C feeding
current starts at 10 °C and
stops at 11°C (1-degree
hysteresis).
M3.1.2.5 Motor preheat current 0
0.5*I
L
A Varies 1227
DC current for pre-heating
of motor and drive in stop
state. Activated by digital
input or by temperature
limit.