L33354-XA28UEN-E1-S01, REV. A CLOSED-LOOP TUNING
Copyright © 2020 Amatrol, Inc.
S01-4
SKILL 1 TUNE A CONTROL LOOP USING THE AUTO-TUNE METHOD
3. Remove the lockout/tagout.
4. Press pushbutton switch
PB1
to the off (out) position.
PB1 is used to turn the circulation pump on and off.
5. Perform the following substeps to configure the parameters in the PID controller as a closed loop system.
Typically, most of the parameters will already be configured as needed.
A. Turn on the main circuit breaker to apply power to the system.
B. Press and hold the
P
key for 3 seconds to go to the hidden loop and the configuration loop.
Typically, tunE will appear if additional parameters have not been hidden.
C. Press the
P
key repeatedly until
CnFP
(configuration loop) displays in the lower display area.
D. With CnFP/no displaying, press the up
arrow key to enter the configuration loop.
The first parameter group to display is the input parameters module (1-In).
E. Press the up
arrow to go to the
1-In
(input menu), if 1-In is not already showing.
F. With 1-In displaying, press the
P
key to enter the input parameters module.
The first parameter, which is input type (tyPE), will display.
G. Under type, use the up
or down
arrow keys to change the parameter to
4-20
(4-20 mA input).
H. Press the
P
key, which accepts that value and goes to the next parameter.
When a parameter is showing, use the up
or down
arrow keys to change the value and press the
P
key to
accept that value and move to the next parameter.
I. Continue configuring the input parameters to have the values shown in figure 1-5.
When dual values are shown in the setting column, the first number is in centimeters, and the second number is in
inches. You will use one or the other. If you are not sure which one to use, ask your instructor.
Module 1-Input Parameters (1-In)
Parameter
Description
Setting (cm/in.)
tyPE
Input type
4-20
dCPt
Decimal resolution
0.00
FLtr
Digital fi ltering
8
bANd
Input fi lter band
.1
SHFt
Shift/offset
-1.8
dSP1
Display value scaling point 1 (low)
0.00
dSP2
Display value scaling point 2 (high)
70.36/27.70
SPLO
Setpoint low limit
1.00/0.50
SPHI
Setpoint high limit
6.50/2.50
USr1
User input function 1
SPSL
USr2
User input function 2
ALrS
F1In
F key function 1
Trnf
F2In
F key function 2
None
Figure 1-5. Input Parameter Values
Notice that the setting for dCPt (decimal resolution) is 0.00, which means two decimal places. This two-decimal
place setting will apply to other parameter settings that take decimal places.
Once the last parameter is entered for that module, the display will return to CnFP.
J. Press the up
arrow key until
2-OP
(Output Parameters Module) shows.
K. With 2-OP displaying, press the
P
key to enter the output parameters module.
