Danfoss VLT HVAC Drive FC 102 Operating Instructions Manual page 93

How to Programme
6-50 Terminal 42 Output
Option: Function:
[107] Speed 0-HighLim 0 - Speed High Limit
(parameter 4-13 Motor Speed High Limit
[RPM] and parameter 4-14 Motor Speed
High Limit [Hz]), (0-20 mA)
[113] Ext. Closed Loop 0-100%, (0-20 mA)
1
[114] Ext. Closed Loop 0-100%, (0-20 mA)
2
[115] Ext. Closed Loop 0-100%, (0-20 mA)
3
[130] Out frq 0-100 0-100 Hz
4-20mA
[131] Reference Minimum Reference - Maximum
4-20mA Reference
[132] Feedback -200% to +200% of 20-14 Maximum
4-20mA Reference/Feedb.
[133] Motor cur. 0 - Inverter Max. Current (16-37 Inv.
4-20mA Max. Current)
[134] Torq.0-lim 4-20 0 - Torque limit (4-16 Torque Limit
mA 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
(parameter 4-13 Motor Speed High Limit
[RPM] and parameter 4-14 Motor Speed
High Limit [Hz])
[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%
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 are 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.
MG11F502
Operating Instructions
6-51 Terminal 42 Output Min Scale
Range:
6-52 Terminal 42 Output Max Scale
Range:
100
% 200
*
%]
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 6.14 Example 1
Danfoss A/S © 08/2014 All rights reserved.
Function:
Set the value to be the percentage of the full
range of the variable selected in
parameter 6-50 Terminal 42 Output.
Function:
[0 - Scale for the maximum output (20 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.
Current
(mA)
20
0/4
0% Analogue Analogue
100%
output Output
Min Scale Max Scale
par. 6-93 par. 6-94
Illustration 6.13 Output Current vs Reference
Variable
It is possible to obtain a value lower than 20 mA
at full scale by programming values >100% by
using a formula as follows:
mA
20
× 100% = 200%
mA
10
50%
50Hz
6
Variable
for
output
example:
Speed
(RPM)
100%
100Hz
91
6