Danfoss VLT Automation VT Drive FC 322 Programming Manual page 194

2 Parameter Description
2
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 setpoint reference entered here is added to any other references that are enabled (see par. group 3-1*).
20-23 Setpoint 3
Range:
0.000* [Ref - Ref
MIN
20-12)]
2.17.4 20-7* PID autotuning
The frequency converter PID Closed Loop controller (parameters 20-**, FC Closed Loop) can be auto-tuned, simplifying and saving time during com-
missioning, whilst ensuring accurate PID control adjustment. To use auto-tuning it is necessary for the frequency converter to be configured for closed
loop in par. 1-00 Configuration Mode
192
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all feedback signals are below their corresponding setpoints, the PID Controller will use the feed-
back/setpoint pair in which the difference between the feedback and the setpoint reference is the
least.
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:
UNIT (from par. Setpoint 3 is used in Closed Loop Mode to enter a setpoint reference that may be used by the
MAX
frequency converter's PID Controller. See the description of par. 20-20 Feedback Function.
.
MG.20.W1.22 - VLT is a registered Danfoss trademark
NB!
If only two feedback signals are used, the feedback that is not to be used must
No Function
be set to in par. 20-00, 20-03 or 20-06. Note that each setpoint
reference will be the sum of its respective parameter value (20-21, 20-22 and
20-23) and any other references that are enabled (see par. group 3-1*).
NB!
Setpoint reference entered here is added to any other references that are enabled
(see par. group 3-1*).
NB!
If the min and max references are altered, a new PI - Autotune may be needed.
NB!
The setpoint reference entered here is added to any other references that are
enabled (see par. group 3-1*).
VLT Automation VT Drive FC322
Programming Guide
Feedback Function
.
Feedback Function , par. 20-20 Feedback