Setpoint - Danfoss VLT Programming Manual

3 Parameter Description
3
Example 2 – Multi zone, multi setpoint
The previous example can be used to illustrate the use of multi zone, multi setpoint control. If the zones require different pressures for each VAV box,
each setpoint may be specified in par. 20-21
Feedback Function
par. 20-20
speed of the fan if all feedbacks are above their individual setpoints.

20-21 Setpoint 1

Range:
0.000 Proc- [-999999.999 - 999999.999 Proc-
essCtrlU- essCtrlUnit]
nit*
20-22 Setpoint 2
Range:
0.000 Proc- [-999999.999 - 999999.999 Proc-
essCtrlU- essCtrlUnit]
nit*
NB!
The set-point reference entered here is added to any other references that are enabled (see par. group 3-1*).
20-23 Setpoint 3
Range:
0.000 Proc- [-999999.999 - 999999.999 Proc-
essCtrlU- essCtrlUnit]
nit*
182
Setpoint 1
, par. 20-22
, the PID Controller will increase the speed of the fan if any one of the feedbacks is below its setpoint and decrease the
Function:
Setpoint 1 is used in Closed Loop Mode to enter a setpoint reference that is used by the frequency
converter's PID Controller. See the description of par. 20-20
Function:
Setpoint 2 is used in Closed Loop Mode to enter a setpoint reference that may be used by the
frequency converter's PID Controller. See the description of
Function
.
Function:
Setpoint 3 is used in Closed Loop Mode to enter a setpoint reference that may be used by the
frequency converter's PID Controller. See the description of par. 20-20
MG.11.C9.02 - VLT
Setpoint 2 Setpoint 3
and par. 20-23
NB!
Setpoint reference entered here is added to any other references that are enabled
(see par. group 3-1*).
NB!
The setpoint reference entered here is added to any other references that are
enabled (see par. group 3-1*).
® is a registered Danfoss trademark
®
VLT HVAC Drive Programming Guide
Multi setpoint minimum
. By selecting
Feedback Function .
Feedback Function Feedback
, par. 20-20
Feedback Function
, [5], in
.