Danfoss VLT AutomationDrive FC 300 Programming Manual page 181

3 Parameter descriptions
3.14.3 13-1* Comparators
Comparators are used for comparing continuous variables (i.e. output frequency, output current, analog input etc.) to fixed preset values. In addition,
there are digital values that will be compared to fixed time values. See explanation in par. 13-10
in each scan interval. Use the result (TRUE or FALSE) directly. All parameters in this parameter group are array parameters with index 0 to 5. Select index
0 to programme Comparator 0, select index 1 to programme Comparator 1, and so on.
3
13-10 Comparator Operand
Array [6]
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.
[12] Analog input AI53
[13] Analog input AI54
[14] Analog input AIFB10
[15] Analog input AIS24V
[17] Analog input AICCT
[18] Pulse input FI29
[19] Pulse input FI33
[20] Alarm number
[21] Warning number
[22] Analog input x30 11
[23] Analog input x30 12
[30] Counter A
[31] Counter B
[50] FALSE
[51] TRUE
180
Function:
Choice [1] to [31] are variables which will be compared based on their values. Choice [50] to [186]
are digital values (TRUE/FALSE) where the comparison is based on the amount of time during which
they are set to TRUE or FALSE, respectively. See par. 13-11
Select the variable to be monitored by the comparator.
DISABLED
[0] The comparator is disabled.
Reference [1] The resulting remote reference (not local) as a percentage.
Feedback
[2] In the unit [RPM] or [Hz]
Motor speed
[3] [RPM] or [Hz]
Motor current
[4] [A]
Motor torque [5] [Nm]
Motor power
[6] [kW] or [hp]
Motor voltage
[7] [V]
DC-link voltage
[8] [V]
Motor thermal [9] Expressed as a percentage.
VLT thermal
[10] Expressed as a percentage.
Heat sink temp
[11] Expressed as a percentage.
Analog input AI53 [12] Expressed as a percentage.
Analog input AI54 [13] Expressed as a percentage.
Analog input AIFB10
[14] [V]. AIFB10 is internal 10 V supply.
Analog input AIS24V
[15] [V] Analog input AICCT [17] [°]. AIS24V is switch mode power supply:
SMPS 24 V.
Analog input AICCT [17] [°]. AICCT is control card temperature.
Pulse input FI29
[18] Expressed as a percentage.
Pulse input FI33
[19] Expressed as a percentage.
Alarm number [20] The error number.
Counter A
[30] Number of counts
Counter B
[31] Number of counts
False
[50] Enters the fixed value of false in the comparator.
True [51] Enters the fixed value of true in the comparator.
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MG.33.M8.02 - VLT is a registered Danfoss trademark
FC 300 Programming Guide
Comparator Operand
. Comparators are evaluated once
Comparator Operator
.