Danfoss VLT AutomationDrive FC 302, Programming Manual, Page: 172 / 346

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.
Par. 13-11
Comparator Operator
=
TRUE longer than.
. . .
. . .
Par. 13-10
Comparator Operand
Par. 13-12
Comparator Value
130BB672.10
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: 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.
[0] DISABLED The comparator is disabled.
[1] Reference % The resulting remote reference in
percent.
[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 Value is in percent.
[10] Drive thermal Value is in percent.
[11] Heat sink temp. Value is in percent.
[12] Analog input
AI53 Value is in percent.
13-10 Comparator Operand
Option: Function:
[13] Analog input
AI54 Value is in percent.
[14] Analog input
AIFB10 AIFB10 is internal 10 V supply.
[15] Analog input
AIS24V AIS24V is a 24 V switch mode power
supply.
[17] Analog input
AICCT Value is in [°]. AICCT is control card
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
Error Value of the PID error
(
parameter 18-90 Process PID Error ).
[33] Process PID
Output Value of the PID 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
[38] Actual Position
NOTICE
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
Parameter Descriptions
VLT
®
AutomationDrive FC 301/302
170 Danfoss A/S © 10/2018 All rights reserved. MG33MP02
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