Auber RDK-150-DC Ergänzende Anweisungen Handbuch - Seite 2

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AUBER INSTRUMENTS

The contents below are for reference and advanced applications. Most

users do not need to read beyond this point.

2.2 PID parameter setting (accessed by code 0036)

The values of P, I and D parameters are critical for good response time,

accuracy and stability of the system. The values of the PID parameters

have been optimized for hot runner coil heater. User should not change it

unless the result is not satisfactory.

Setting PID parameters is similar to the setting of the Temperature and

Alarm Parameter as shown in the flow chart of Figure 1. The difference is

that these parameters are accessed by enter code 0036 instead of 0001.

Table 2. PID and relevant parameters

Symbol

Description

Proportional Constant

Integral Constant

Derivative Constant

souf

SouF

Damp Constant

Cycle Rate

FILt

Digital Filter Strength

file

End

Exit

END

Note 3. Proportional Constant (P): When P increases, the system is

more stable. When P decreases, the system is less stable. If the P is too

small, the system would be oscillatory or even non-convergent.

Note 4. Integral time (I): Brings the system up to the set value by adding

a constant to the output that is proportional to how far the process value

(PV) is from the set value (SV) and how long it has been there. When I

decreases, the response speed is faster but the system is less stable.

When I increases, the respond speed is slower, but the system is more

stable. When I is 0, then it turns to be PD control.

Note 5. Derivative time (d): Responds to the rate of PV change, so that

the controller can compensate in advance before |SV-PV| gets too big. A

larger number increases its action. Setting d-value too small or too large

would decrease system stability, cause oscillation or even non-

convergence.

Note 6. Damp constant (SouF): The parameter is controlled by the

artificial intelligence of the controller. This constant helps the PID control

quality. When its value is too high, the system will be over damped.

When its value is too low, the system may overshoot.

SouF too low

Figure 4. Damp constant

Note 7. Cycle rate (ot): It is the time period that the controller uses to

calculate its output. The initial value is set to 2. Short time causes the fan

to pulse at higher frequency. Longer time may reduce the quality of

control.

Note 8. Digital Filter (Filt): can be set as 0, 1, 2, 3. Filt=0, filter disabled;

Filt=3, strongest filtering effect. Stronger filtering increases the stability of

readout display, but causes more delay in the response to changes in

temperature.

2015.05

Range

Initial

0.1~99.9(%)

2.0

2~1999(Sec)

0-399(Sec)

0.1~1.0

0.4

2~199(Sec)

002

0~3

SouF too high

SouF acceptable

2.3 System Configuration Parameters (accessed by code 0089)

Table 3. System configuration parameter setting

Symbol

Inty

Outy

adtu

Adtu

psb

Psb

Corf

corf

End

end

Note

Note 3

Note 4

Operation Mode

SET

XXXX

Note 5

Note 6

Note 7

Note 8

Note 9. Display unit selection CorF: 0 for Celsius (° C); 1 for Fahrenheit

(° F). By default, CorF is set to 1 (Fahrenheit). For Celsius display, you

need to set CorF to 0 and divide your original P value by 1.8.

For example, assuming your original P value is 2.0. To change to Celsius

display, you need to set CorF=0 and P = 1.1 (2.0/1.8=1.11).

E-mail: [email protected] Tel: 770-569-8420

No part of this manual shall be copied, reproduced, or transmitted in any way

without the prior, written consent of Auber Instruments. Auber Instruments

retains the exclusive rights to all information included in this document.

WWW.AUBERINS.COM

Description

Range

Not applicable

Display Unit

0: ° C 1:° F

Exit

Parameter Display

Enter Code

SET

0089

inty

SET

outy

SET

atdu

SET

psb

SET

corf

SET

end

Figure 5. The system setup flow chart

Auber Instruments Inc.

5755 North Point Parkway, Suite 99,

Alpharetta, GA 30022

www.auberins.com

Initial

Note

Note 9

SET

XXXX

SET

XXXX

SET

Display Unit(C/F)

SET

P2/2