21-02 PID Output Change
Range:
Function:
0.10
*
[0.01 -
0.50 ]
This parameter sets the magnitude of step
change during autotuning. The value is a
percentage of full operating range. I.e. if
maximum analog output voltage is set to 10
V, 0.10 is 10% of 10 V, which is 1 V. This
parameter should be set to a value resulting in
feedback changes of between 10% and 20%
for best tuning accuracy.
21-03 Minimum Feedback Level
Range:
Function:
-999999.000
*
[ -999999.999
- par. 21-04 ]
The minimum allowable feedback
level should be entered here in
User Units as defined in
21-10 Ext. 1 Ref./Feedback Unit
for
EXT CL 1,
for EXT CL 2 or
21-50 Ext. 3 Ref./Feedback Unit
for
EXT CL 3. If the level falls below
PID autotuning is aborted and an
error message will appear on the
LCP.
21-04 Maximum Feedback Level
Range:
Function:
999999.000
*
[ par. 21-03 -
999999.999 ]
The maximum allowable feedback
level should be entered here in
User units as defined in
for EXT CL 1,
21-30 Ext. 2 Ref./Feedback Unit
for
EXT CL 2 or
for EXT CL 3 If the
level rises above
, PID autotuning is
aborted and an error message will
appear on the LCP.
21-09 PID Autotuning
Option:
Function:
This parameter enables selection of the
Extended PID controller to be autotuned
and starts the PID autotuning for that
controller. Once the autotuning has
successfully completed and the settings
have been accepted or rejected by the
user, by pressing [OK] or [Cancel]
buttons on the LCP at the end of
tuning, this parameter is reset to [0]
Disabled.
[0]
*
Disabled
[1]
Enabled Ext CL 1
PID
21-09 PID Autotuning
Option:
Function:
[2]
Enabled Ext CL 2
PID
[3]
Enabled Ext CL 3
PID
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
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
Parameter Description
VLT
®
HVAC Drive Programming Guide
140
MG.11.CC.02 - VLT
®
is a registered Danfoss trademark
3
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