![background image](http://html1.mh-extra.com/html/danfoss/vlt-automationdrive-fc-301/vlt-automationdrive-fc-301_programming-manual_507840381.webp)
5.13.2 13-1* Comparators
Comparators are used for comparing continuous variables (that is output frequency, output current, analog input, and so on) to
fixed preset values.
Par. 13-11
Comparator Operator
=
TRUE longer than.
. . .
. . .
Par. 13-10
Comparator Operand
Par. 13-12
Comparator Value
e3
0b
b6
72
.1
0
Illustration 79: Comparators
There are digital values that are compared to fixed time values. See the explanation in
parameter 13-10 Comparator Operand
. Com-
parators are evaluated once in each scan interval. Use the result (true or false) directly. All parameters in this parameter group are
array parameters with index 0–9. Select index 0 to program comparator 0, select index 1 to program comparator 1, and so on.
Parameter 13-10 Comparator Operand
Table 674: Parameter 13-10 Comparator Operand
13-10 Comparator Operand
Default value: Size related
Parameter type: Option, Array [10]
Setup: 2 setups
Conversion index: -
Data type: Uint8
Change during operation: True
Options
[1] Reference %
to
[31] Counter B
are variables which are compared based on their values. Options
[50] FALSE
to
[186] Drive in
auto mode
are digital values (true/false) where the comparison is based on the amount of time during which they are set to true or
false. See
parameter 13-11 Comparator Operator
.
Option Name
Description
[0]
DISABLED
The comparator is disabled.
[1]
Reference %
The resulting remote reference in %.
[2]
Feedback %
[RPM] or [Hz], as set in
parameter 0-02 Motor Speed Unit
.
[3]
Motor speed
[RPM] or [Hz], as set in
parameter 0-02 Motor Speed Unit
.
[4]
Motor current
[5]
Motor torque
[6]
Motor power
[7]
Motor voltage
[8]
DC-link voltage
[9]
Motor thermal
The value is in %.
[10]
Drive thermal
The value is in %.
[11]
Heat sink temp.
The value is in %.
[12]
Analog input AI53
The value is in %.
[13]
Analog input AI54
The value is in %.
[14]
Analog input AIFB10
AIFB10 is internal 10 V supply.
[15]
Analog input AIS24V
AIS24V is a 24 V switch mode power supply.
AU275636650261en-000101 / 130R0334 | 381
Danfoss A/S © 2022.12
Parameter Descriptions
VLT AutomationDrive FC 301/302
Programming Guide