Danfoss VLT HVAC Series Programming Manual page 210

3 Parameter Description
21-12 Ext. 1 Maximum Reference
Range:
100.000 Ex- [par. 21-11 - 999999.999 Ex-
tPID1Unit* tPID1Unit]
3
NOTE!
Always set the desired value for par.21-12
21-13 Ext. 1 Reference Source
Option:
[0] * No function
[1] Analog input 53
[2] Analog input 54
[7] Pulse input 29
[8] Pulse input 33
[20] Digital pot.meter
[21] Analog input X30/11
[22] Analog input X30/12
[23] Analog Input X42/1
[24] Analog Input X42/3
[25] Analog Input X42/5
[30] Ext. Closed-loop 1
[31] Ext. Closed-loop 2
[32] Ext. Closed-loop 3
3-186
Function:
Select the maximum for the Closed-loop 1 Controller.
The dynamics of the PID controller will depend on the value set in this parameter. Please see also
par.21-21 Ext. 1 Proportional Gain .
Ext. 1 Maximum Reference before setting the values for the PID controller in par. 20-9*.
Function:
This parameter defines which input on the adjustable frequency drive should be treated as the
source of the reference signal for the closed-loop 1 controller. Analog input X30/11 and Analog input
X30/12 refer to inputs on the General Purpose I/O.
MG.11.C6.22 - VLT ® is a registered Danfoss trademark
VLT ® HVAC Drive Programming Guide