Danfoss FC 300 Design Manual page 39

FC 300 Design Guide
Example of Process PID Control set-up
Function
Initialize the adjustable frequency
drive
1) Set motor parameters:
Set the motor parameters according to
nameplate data
Perform a full Automation Motor
Adaptation
2) Make sure that motor is running in the right direction.
When motor is connected to an adjustable frequency drive with straight forward phase order as U - U;
V- V; W - W motor shaft usually turns clockwise seen into shaft end.
Press "Hand On" LCP key. Check shaft
direction by applying a manual refer-
ence.
If motor turns opposite of required di-
rection:
1. Change motor direction in par. 4-10
2. Turn off line power - wait for DC
link to discharge - switch two of the
motor phases
Set configuration mode.
Set Local Mode Configuration
3) Set reference configuration, i.e., the range for reference handling. Set scaling of analog input in par.
6-xx
Set reference/feedback units
Set min. reference (50° F [10° C])
Set max. reference (176° F [80° C])
If set value is determined from a preset
value (array parameter), set other ref-
erence sources to No Function.
4) Adjust limits for the adjustable frequency drive:
Set ramp times to an appropriate value
as 20 sec.
Set min. speed limits
Set motor speed max. limit
Set max. output frequency
Set S201 or S202 to desired analog input function (Voltage (V) or milli-Amps (I))
NOTE! Switches are sensitive - Make a power cycling keeping default setting of V
5) Scale analog inputs used for reference and feedback
Set terminal 53 low voltage
Set terminal 53 high voltage
Set terminal 54 low feedback value
Set terminal 54 high feedback value
Set feedback source
6) Basic PID settings
Process PID Normal/Inverse
Process PID Anti Wind-up
Process PID start speed
Save parameters to LCP
Par. Setting
no.
14-22 [2] Initialization - perform power cycling - press reset
1-2* As stated on motor nameplate
1-29 [1] Enable complete AMA
4-10 Select correct motor shaft direction.
1-00 [3] Process
1-05 [0] Speed Open-loop
3-01 [140]° F [[60]° C] Unit shown on display
3-02 23° F [-5° C]
3-03 95° F [35° C]
3-10 [0] 35%
Ref
Par. 3-14 to par. 3-18 [0] = No Function
3-41 20 sec.
3-42 20 sec.
4-11 300 RPM
4-13 1500 RPM
4-19 60 Hz
6-10 0 V
6-11 10 V
6-24 23° F [-5° C]
6-25 95° F [35° C]
7-20 [2] Analog input 54
7-30 [0] Normal
7-31 [1] On
7-37 300 rpm
0-50 [1] All to LCP
MG.33.B9.22 - VLT ® is a registered Danfoss trademark.
3. Introduction to FC 300
P
3 − 10 (
0 )
× (( P 3 − 03 ) − (
=
100
3
p 3 − 02 )) = 24, 5° C
39