Danfoss VLT AQUA Drive FC 202 Operating Instructions Manual page 83

How to programme the freque...
6-50 Terminal 42 Output
Option: Function:
[134] Torq.0-lim 4-20 mA 0 - Torque limit (4-16 Torque Limit
Motor Mode)
[135] Torq.0-nom 0 - Motor rated torque
4-20mA
[136] Power 4-20mA 0 - Motor rated power
[137] Speed 4-20mA 0 - Speed High Limit (4-13 and 4-14)
[138] Torque 4-20mA
[139] Bus ctrl. 0-100%, (0-20 mA)
[140] Bus ctrl. 4-20 mA 0-100%
[141] Bus ctrl t.o. 0-100%, (0-20 mA)
[142] Bus ctrl t.o. 0-100%
4-20mA
[143] Ext. CL 1 4-20mA 0-100%
[144] Ext. CL 2 4-20mA 0-100%
[145] Ext. CL 3 4-20mA 0-100%
[146] Cascade Ref.
4-20mA
[147] Main act val
0-20mA
[148] Main act val
4-20mA
[150] Out frq 0-Fmax
4-20mA
[254] DC Link 0-20mA
[255] DC Link 4-20mA
NOTICE
Values for setting the minimum reference are found in
open loop parameter 3-02 Minimum Reference and for
closed loop 20-13 Minimum Reference/Feedb. - values for
maximum reference for open loop is found in
3-03 Maximum Reference and for closed loop
20-14 Maximum Reference/Feedb.
6-51 Terminal 42 Output Min Scale
Range: Function:
0 % [0 - 200 Scale for the minimum output (0 mA or 4 mA)
*
%] of the analog signal at terminal 42.
Set the value to be the percentage of the full
range of the variable selected in
parameter 6-50 Terminal 42 Output.
6-52 Terminal 42 Output Max Scale
Range: Function:
100 [0 - Scale for the maximum output (20 mA) of the
% 200 analog signal at terminal 42.
*
%] Set the value to be the percentage of the full
range of the variable selected in
parameter 6-50 Terminal 42 Output.
MG20Y202
Operating Instructions
6-52 Terminal 42 Output Max Scale
Range:
mA / desired maximum current × 100%
20
i . e . 10 mA :
Example 1:
Variable value=OUTPUT FREQUENCY, range=0-100 Hz
Range needed for output=0-50 Hz
Output signal 0 mA or 4 mA is needed at 0 Hz (0% of
range) - set parameter 6-51 Terminal 42 Output Min Scale to
0%
Output signal 20 mA is needed at 50 Hz (50% of range) -
set parameter 6-52 Terminal 42 Output Max Scale to 50%
20 mA
0/4 mA
0%
0Hz
Illustration 6.20 Example 1
Example 2:
Variable=FEEDBACK, range=-200% to +200%
Range needed for output=0-100%
Output signal 0 mA or 4 mA is needed at 0% (50% of
range) - set parameter 6-51 Terminal 42 Output Min Scale to
50%
Output signal 20 mA is needed at 100% (75% of range) -
set parameter 6-52 Terminal 42 Output Max Scale to 75%
Danfoss A/S © Rev. 06/2014 All rights reserved.
Function:
Current
(mA)
20
0/4
0% Analogue Analogue 100% Variable
output Output for
Min Scale Max Scale output
par. 6-93 par. 6-94 example:
Speed
(RPM)
Illustration 6.19 Output Current vs Reference
Variable
It is possible to get a value lower than 20 mA at
full scale by programming values >100% by using
a formula as follows:
mA
20
× 100% = 200%
10 mA
50%
50Hz
6 6
100%
100Hz
81