Comparators; Comparator Operand - Danfoss VLT AutomationDrive FC 302 Programming Manual

Parameter Descriptions

3.13.2 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.
3 3
Par. 13-10

Comparator Operand

Par. 13-12
Comparator Value
Illustration 3.54 Comparators
There are digital values that are compared to fixed time
values. See the explanation in parameter 13-10 Comparator
Operand. Comparators 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 0–5. Select index 0 to program comparator 0,
select index 1 to program comparator 1, and so on.
13-10 Comparator Operand
Option:
[0] DISABLED
[1] Reference %
[2] Feedback %
[3] Motor speed
[4] Motor Current
[5] Motor torque
[6] Motor power
[7] Motor voltage
[8] DC-link voltage
[9] Motor Thermal
[10] Drive thermal
[11] Heat sink temp. Value is in percent.
[12] Analog input
AI53
170
®
VLT AutomationDrive FC 301/302
Par. 13-11
Comparator Operator
=
TRUE longer than.
. . .
. . .
Function:
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.
Select the variable to be monitored by
the comparator.
The comparator is disabled.
The resulting remote reference in
percent.
[RPM] or [Hz], as set in
parameter 0-02 Motor Speed Unit.
[RPM] or [Hz], as set in
parameter 0-02 Motor Speed Unit.
Value is in percent.
Value is in percent.
Value is in percent.
Danfoss A/S © 10/2018 All rights reserved.
13-10 Comparator Operand
Option: Function:
[13] Analog input Value is in percent.
AI54
[14] Analog input AIFB10 is internal 10 V supply.
AIFB10
[15] Analog input AIS24V is a 24 V switch mode power
AIS24V supply.
[17] Analog input Value is in [°]. AICCT is control card
AICCT temperature.
[18] Pulse input FI29 Value is in percent.
[19] Pulse input FI33 Value is in percent.
[20] Alarm number The number of registered alarms.
[21] Warning
number
[22] Analog input
x30 11
[23] Analog input
x30 12
[30] Counter A
[31] Counter B
[32] Process PID Value of the PID error
Error (parameter 18-90 Process PID Error).
[33] Process PID Value of the PID output
Output (parameter 18-91 Process PID Output).
[34] Analog Input
x48/2
[35] Temp Input
x48/4
[36] Temp Input
x48/7
[37] Temp Input
x48/10
NOTICE
[38] Actual Position
This option is only available for
software version 48.XX
[39] Safe Opt. Speed
Error
[50] FALSE Use to enter the fixed value of false in
the comparator.
[51] TRUE Use to enter the fixed value of true in
the comparator.
[52] Control ready The control board receives supply
voltage.
[53] Drive ready The frequency converter is ready for
operation and applies a signal on the
control board.
[54] Running The motor runs.
[55] Reversing The output is active when the frequency
converter runs counterclockwise (the
MG33MP02