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L33354-XA28UEN-E1-S01, REV. A   CLOSED-LOOP TUNING
Copyright © 2020 Amatrol, Inc.

S01-3

SKILL 1   TUNE A CONTROL LOOP USING THE AUTO-TUNE METHOD

 

Figure 1-3 shows the wiring diagram for the closed loop level control circuit.

Figure 1-3. 

Wiring Diagram for a Level Sensor Connected to an Electronic Controller

 

Figure 1-4 shows the P&ID for the 990-PC1. The active components and wiring are highlighted.

Figure 1-4. 

990-PC1 P&ID

24

VDC

+

-

+

-

+

-

CONTROLLER INPUTS

PRESSURE

SENSOR

+

-

+

-

CONTROLLER

OUTPUT

4-20mA

+

-

I/P

CONVERTER

+

-

DC POWER

SUPPLY

PB1

PB2

AI 1

LT1

A01

FV1

CIRC. PUMP

P1

SV3

ANALOG OUTPUT

CONNECTIONS

S

S

S

PI

100-A

HV

100-A

HV

100-B

SV

100-A

FV

100

PI

100-B

FCV

100

LSH

200-B

LSH

200-A

LET

200-A

HV

300

SV

100-B

HV

100-C

SV

100-C

FI

100

FIC
100

IY

100

PC

100

PI

100-C

FE

100

FIT

100

RESERVOIR

TANK

DUAL-COMPARTMENT

PROCESS TANK

OVERFLOW

LEVEL

SENSOR

PROPORTIONAL

VALVE

CONTROLLER

I/P

CONVERTER

PLANT

AIR

WATER

PUMP

Summary of Contents for 990-PC1

Page 1: ...out tagout 2 Perform the following substeps to set up the 990 PC1 as shown in figure 1 1 NOTE The appearance of the electrical outlet will differ based on the electrical power supplied at your locatio...

Page 2: ...e D Close fully clockwise the two process tank manual drain valves HV 300 HV3 and HV 100C HV4 E Open fully counterclockwise the manual flow control valve FV 100 HFV F Open fully counterclockwise the f...

Page 3: ...tive components and wiring are highlighted Figure 1 4 990 PC1 P ID 24 VDC CONTROLLER INPUTS PRESSURE SENSOR CONTROLLER OUTPUT 4 20mA I P CONVERTER DC POWER SUPPLY PB1 PB2 AI1 LT1 A01 FV1 CIRC PUMP P1...

Page 4: ...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...

Page 5: ...ameters Module shows N With 3 LC displaying press the P key to enter the lockout parameters module O Configure the lockout parameters to have the values show in figure 1 7 Module 3 Lockout Parameters...

Page 6: ...D If the PV value on the display is not approximately 0 00 then adjust the value in the display shift offset SHFt parameter which is in the input parameters module 1 In E If not in the display loop p...

Page 7: ...process tank until the level is about 3 5 cm or 1 5 in C Open the solenoid drain valve SV 100C SV3 PB2 on D Start the circulation pump PB1 on E Record the value of the PV every five seconds in a tabl...

Page 8: ...to plot the response of the system Figure 1 9 Graph of PV inches vs Time Figure 1 10 Graph of PV cm vs Time 2 3 2 2 2 1 2 0 1 9 1 8 1 7 1 5 1 6 1 4 1 3 1 2 1 1 1 0 0 70 80 90 100 110 120 130 140 150...

Page 9: ...l dropped while you were calculating the new tuning parameters Your response may have little overshoot which is good also Figure 1 11 Response of the System PV in inches Figure 1 12 Response of the Sy...

Page 10: ...llations C Determine if the process is currently too slow and sluggish If you determine it is too sluggish the proper correction depends on the cause of the sluggishness If the proportional band is se...

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