User`s guide

85
CHAPTER 6 - DETAILED PARAMETER DESCRIPTION
Thefrequencyreference (i.e.,the desired output frequency, or
alternatively, the motor speed)canbe defined in several ways:
The keypad -digital reference thatcanbe changed through
the keypad (HMI), by using the keys
and
(refer
to the parameters P221, P222 and P121);
Analog input - the analog input AI1 (XC1:6) or the AI2
(XC1:8) canbeused, or both (referto theparameters P221,
P222 and P234 to P240);
Multispeed - up to 8 preset digital references (refer to the
parameters P221, P222 and P124 to P131);
Electronic potentiometer (EP) - another digital reference,
its value is defined by using 2 digital inputs (DI3 and DI4) -
refer to the parameters P221, P222, P265 and 266;
Via serial.
Figure 6.1 shows through a diagram block the frequency
reference definition to be used by the inverter.
The block diagram in figure 6.2 shows the inverter control.
NOTE!
AI2 is only available in CFW-08 Plus version.
DIs ON when connected to 0V (XC1:5)with S1:1 OFF and
when connected to 24 V(external) with S1:1 to ON.
When F* < 0 one takes the module of F* and reverses the
direction of rotation
(
if this is possible
- P231
=
2
and if the
selected control is not forward run/reverse run).
6.2.4
FrequencyReference
Sources