Operation; Frequency Control Mode - Embraco Fullmotion CF10C Product Manual

Chapter 4

OPERATION

! !
The Fullmotion CF10C Inverter have support for Serial, Frequency and Drop-In com-
munication modes. WARNING
! ! ! !
CAUTION

4.1 Frequency control mode

NOTICE
In this operation mode the compressor speed is controled through a frequency sig-
nal sent to the inverter. Usually this signal is provided by an electronic thermostat.
The frequency signal is a digital square wave and its characteristics are described
on Signal specification table and Figure below.
Signal specifications
Voltage range
OFF state
ON state
Maximum duty-cycle
Minimum duty-cycle
Maximum current
0.7 V to 4.5 V the inverter behaviour is indefinite, therefore, it is not recommended
to use signals within this range. The following figure presents a graphic example of
an input frequency signal of 125 Hz sent to the inverter. The digital signal duty-cycle
can vary in the range from 30% to 70%.
• The inverter is assembled with all commu-
nication modes and the control mode is
chosen automatically by the inverter.
-5 V to +15 V
-5 V to +0.7 V
+4.5 V to +15 V
70%
30%
15 mA @ 15 V
29
15V
On state
4.5V
Indefinite state
0.7V
Off state
-5V
From