Danfoss VLT AQUA Drive FC 200 Operating Instructions Manual page 91

How to Programme the Low Ha...
20-12 Reference/Feedback Unit
Option:
[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
6 6
[70] mbar
[71] bar
[72] Pa
[73] kPa
[74] m WG
[75] mm Hg
[80] kW
[120] GPM
[121] gal/s
[122] gal/min
[123] gal/h
[124] CFM
[125] ft³/s
[126] ft³/min
[127] ft³/h
[130] lb/s
[131] lb/min
[132] lb/h
[140] ft/s
[141] ft/min
[145] ft
[160] °F
[170] psi
[171] lb/in²
[172] in WG
[173] ft WG
[174] in Hg
[180] HP
20-21 Setpoint 1
Range:
0.000
ProcessCtrlUnit
90
Function:
This parameter determines the unit that is used
for the setpoint reference and feedback that the
PID Controller will use for controlling the output
frequency of the frequency converter.
Function:
[ par. 20-13 - Setpoint 1 is used in
par. 20-14 Closed Loop Mode to enter
*
ProcessCtrlUnit] a setpoint reference that is
used by the frequency
converter's PID Controller.
MG20T202 - VLT
VLT AQUA Low Harmonic Drive Operating Instructions
20-21 Setpoint 1
Range:
20-81 PID Normal/ Inverse Control
Option:
[0] Normal [0] Normal causes the frequency converter's output
*
[1] Inverse [1] Inverse causes the frequency converter's output
20-82 PID Start Speed [RPM]
Range:
Size
related
*
20-93 PID Proportional Gain
Range:
0.50
*
If (Error x Gain) jumps with a value equal to what is set in
20-14 Maximum Reference/Feedb. the PID controller will try
to change the output speed equal to what is set in
4-13 Motor Speed High Limit [RPM]/4-14 Motor Speed High
Limit [Hz] but in practice of course limited by this setting.
®
is a registered Danfoss trademark
Function:
See the description of
20-20 Feedback Function.
NOTE
Setpoint reference
entered here is added
to any other references
that are enabled (see
parameter group 3-1*).
Function:
frequency to decrease when the feedback is
greater than the setpoint reference. This is
common for pressure-controlled supply fan and
pump applications.
frequency to increase when the feedback is greater
than the setpoint reference.
Function:
[ 0 - When the frequency converter is first
par. 4-13 started, it initially ramps up to this output
RPM] speed in Open Loop Mode, following the
active Ramp Up Time. When the output
speed programmed here is reached, the
frequency converter will automatically
switch to Closed Loop Mode and the PID
Controller will begin to function. This is
useful in applications in which the driven
load must first quickly accelerate to a
minimum speed when it is started.
NOTE
This parameter will only be visible if
0-02 Motor Speed Unit is set to [0],
RPM.
Function:
[0.00 - 10.00 ] The proportional gain indicates the
number of times the error between the
set point and the feedback signal is to be
applied.