Danfoss VLT HVAC Drive FC 102 - Page 155

3.19.2 21-1* Closed Loop 1 Ref/Feedback
FC
MCB101
130BA355.11
External
Reference
Set
point
Feedback
Output
Signal
Ext.
Closed
Loop
controller
1
Output
Signal
P 21-13
P 21-14
P 21-15
P 6-60
P 6-50
Illustration 3.49 Closed Loop 1 Ref/Feedback
21-10 Ext. 1 Ref./Feedback Unit
Option: Function:
Select the unit for the reference and feedback.
[0] None
[1] * %
[5] PPM
[10] 1/min
[11] RPM
[12] Pulse/s
[20] l/s
[21] l/min
[22] l/h
[23] m³/s
[24] m³/min
[25] m³/h
[30] kg/s
[31] kg/min
[32] kg/h
[33] t/min
[34] t/h
[40] m/s
[41] m/min
[45] m
[60] °C
[70] mbar
[71] bar
[72] Pa
[73] kPa
[74] m WG
[75] mm Hg
[80] kW
[120] GPM
[121] gal/s
21-10 Ext. 1 Ref./Feedback Unit
Option: Function:
[122] gal/min
[123] gal/h
[124] CFM
[125] ft³/s
[126] ft³/min
[127] ft³/h
[130] lb/s
[131] lb/min
[132] lb/h
[140] ft/s
[141] ft/min
[145] ft
[160] °F
[170] psi
[171] lb/in²
[172] in WG
[173] ft WG
[174] in Hg
[180] HP
21-11 Ext. 1 Minimum Reference
Range: Function:
0 ExtPID1Unit* [ -999999.999 - par.
21-12 ExtPID1Unit]
Select the minimum
reference for the closed
loop 1 controller.
21-12 Ext. 1 Maximum Reference
Range: Function:
100
ExtPID1Unit*
[ par. 21-11 -
999999.999
ExtPID1Unit]
NOTICE
Always set the desired value
for parameter 21-12 Ext. 1
Maximum Reference before
setting the values for the
PID controller in parameter
group 20-9* PID Controller.
Select the maximum reference for
the closed loop 1 controller.
The dynamics of the PID
controller depend on the value
set in this parameter. See also
parameter 21-21 Ext. 1 Propor-
tional Gain.
Parameter Descriptions Programming Guide
MG11CE02 Danfoss A/S © 03/2015 All rights reserved. 153
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