Setpoint 1; Setpoint 2; Pid Normal/Inverse Control; Pid Proportional Gain - Danfoss vlt FC 102 Operating Instructions Manual

®
VLT HVAC Drive Operating Instructions

20-21 Setpoint 1

Range:
*
0.000 [Ref par.3-02 - Ref
MIN
par. 3-03 UNIT (from par. 20-12)]

20-22 Setpoint 2

Range:
*
0.000 [Ref - Ref UNIT (from
MIN MAX
par. 20-12)]

20-81 PID Normal/Inverse Control

Option:
*
Normal
[0]
[1] Inverse

20-93 PID Proportional Gain

Range:
*
0.50 [0.00 = Off - 10.00]
20-94 PID Integral Time
Range:
*
[0.01 - 10000.00 = Off s] The integrator adds over time (integrates) the error between the feedback and the setpoint reference. This is
20.00 s
22-21 Low PowerDetection
If selecting Enabled, the Low Power Detection commissioning must be carried out in order to set the parameters in
group 22-3* for proper operation!
*
Disabled
[0]
[1] Enabled
22-22 Low Speed Detection
Select Enabled for detecting when the motor operates with a speed as set in par. 4-11 or 4-12,
* Disabled
[0]
[1] Enabled
Function:
Setpoint 1 is used in Closed Loop Mode to enter a setpoint reference that is used by the frequency converter's
MAX
PID Controller. See the description of
NB!
Setpoint reference entered here is added to any other references that are enabled (see par.
group 3-1*).
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
NB!
The setpoint reference entered here is added to any other references that are enabled (see
par. group 3-1*).
Function:
Normal
[0] causes the frequency converter's output frequency to decrease when the feedback is greater than
the setpoint reference. This is common for pressure-controlled supply fan and pump applications.
Inverse
[1] causes the frequency converter's output frequency to increase when the feedback is greater than
the setpoint reference. This is common for temperature-controlled cooling applications, such as cooling towers.
Function:
This parameter adjusts the output of the frequency converter's PID Controller based on the error between the
feedback and the setpoint reference. Quick PID Controller response is obtained when this value is large. However,
if too large a value is used, the frequency converter's output frequency may become unstable.
Function:
required to ensure that the error approaches zero. Quick frequency converter speed adjustment is obtained when
this value is small. However, if too small of a value is used, the frequency converter's output frequency may
become unstable.
MG.11.A6.02 - VLT ® is a registered Danfoss trademark
6. How to programme the frequency converter
Feedback Function
, par. 20-20.
Feedback Function , par. 20-20.
Motor Low Limit
.
97
6