Danfoss VLT HVAC Drive FC 102 Operating Instructions Manual page 82

How to Programme
6-50 Terminal 42 Output
Option:
[0] No operation
[100] Output freq.
0-100
[101] Reference Min-
Max
[102] Feedback +-200%
[103] Motor cur. 0-Imax
6 6
[104] Torque 0-Tlim
[105] Torque 0-Tnom
[106] Power 0-Pnom
[107] Speed 0-HighLim
[113] Ext. Closed Loop
1
[114] Ext. Closed Loop
2
[115] Ext. Closed Loop
3
[130] Out frq 0-100
4-20mA
[131] Reference 4-20mA Minimum Reference - Maximum
[132] Feedback 4-20mA -200% to +200% of 20-14 Maximum
[133] Motor cur.
4-20mA
[134] Torq.0-lim 4-20
mA
[135] Torq.0-nom
4-20mA
[136] Power 4-20mA
[137] Speed 4-20mA
[139] Bus ctrl.
[140] Bus ctrl. 4-20 mA
[141] Bus ctrl t.o.
[142] Bus ctrl t.o.
4-20mA
[143] Ext. CL 1 4-20mA
[144] Ext. CL 2 4-20mA
80
Operating Instructions
Function:
Select the function of Terminal 42 as
an analog current output. A motor
current of 20 mA corresponds to I
0-100 Hz, (0-20 mA)
Minimum reference - Maximum
reference, (0-20 mA)
-200% to +200% of 20-14 Maximum
Reference/Feedb., (0-20 mA)
0 - Inverter Max. Current (16-37 Inv.
Max. Current), (0-20 mA)
0 - Torque limit (4-16 Torque Limit
Motor Mode), (0-20 mA)
0 - Motor rated torque, (0-20 mA)
0 - Motor rated power, (0-20 mA)
0 - Speed High Limit
(parameter 4-13 Motor Speed High Limit
[RPM] and parameter 4-14 Motor Speed
High Limit [Hz]), (0-20 mA)
0-100%, (0-20 mA)
0-100%, (0-20 mA)
0-100%, (0-20 mA)
0-100 Hz
Reference
Reference/Feedb.
0 - Inverter Max. Current (16-37 Inv.
Max. Current)
0 - Torque limit (4-16 Torque Limit
Motor Mode)
0 - Motor rated torque
0 - Motor rated power
0 - Speed High Limit (4-13 and 4-14)
0-100%, (0-20 mA)
0-100%
0-100%, (0-20 mA)
0-100%
0-100%
0-100%
Danfoss A/S © Rev. 06/2014 All rights reserved.
6-50 Terminal 42 Output
Option:
[145] Ext. CL 3 4-20mA
NOTICE
.
max
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.
Current
(mA)
20
0/4
0%
Illustration 6.13 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:
20 mA / desired maximum current × 100%
20 mA
i . e . 10 mA :
× 100% = 200%
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%
Function:
0-100%
Analogue Analogue 100% Variable
output Output for
Min Scale Max Scale output
par. 6-93 par. 6-94
example:
Speed
(RPM)
MG16B202