Auber Instruments SYL-2362B Інструкція з експлуатації - Сторінка 3

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AUBER INSTRUMENTS

Instruction Manual

4 - Relay J1 as alarm output; J2 as On/off control relay contactor output;

SSR output disabled;

5 - Relay J1 as alarm output; J2 as Limit control relay contactor output;

SSR output disabled;

6 - Relay J1, J2 as alarm output; SSR for Limit control output.

Note 3. Hysteresis Band (also called dead band, or differential), Hy, is used for

On/off control and Limit control. Its unit is in degrees (

control mode, the output will be off when PV>SV and on again when PV <SV-

Hy for heating. For cooling, the output will be off when PV<SV and on again

when PV>SV+Hy. For Limit control mode, the controller can not be reset (to

turn on the output) when PV>SV-Hy for heating, and when PV< SV+Hy f o r

cooling.

Note 4 . The autotune offset will shift the SV value down by the Atdu value

during the autotune process. That will prevent the system from damage due to

overheating during the autotune.

Note 5. Calibration offset, PSb is used to set an input offset to compensate

the error produced by the sensor. For example, if the meter displays 5 ºC

when probe is in ice/water mixture, setting PSb=-5, will make the controller

display 0 ºC. To set negative value, shift to the very left digit, press down key

until it shows "-".

5.2 PID Parameters (accessed by code 0036)

The PID and relevant parameters are listed in table 3. To change the

parameters, press

, enter code "0036", and press

SET

parameter flow chart is similar to Figure 3.

Table 3. PID and relevant parameters

Sy mbol

Description

Proportional Constant

Integral Time

Deriv ativ e Time

SouF

Damp Constant

SouF

Cy cle Rate

FILt

Digital Filter Strength

FILt

End

Ex it

End

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

accuracy and stability of the system. Using the Auto-tune function to

automatically determine these parameters is recommended for the first time

user. If the auto-tuning result is not satisfactory, you can manually fine-tune

the PID constants for improved performance.

Note 6. Proportional Constant (P): P is also called the proportional band. Its

unit is the percentage of the temperature range. e. g. For a K type

thermocouple, the control range is 1500 °C. P=5 means the proportional

band is 75 °C (1500x5%). Assuming the set temperature (SV) = 200. When

integral, I, and derivative, d, actions are removed, the controller output power

will change from 100% to 0% when temperature increases from 125 to

200°C. The smaller the P value is, the stronger action will be for the same

temperature difference between SV and PV.

Note 7. Integral time (I): Brings the system up to the set value by adding 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.

Note 8. 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, causing oscillation or even non-convergence.

Note 9. Damp constant: This constant can help the PID controller further

improve the control quality. It uses artificial intelligence to dampen the

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

overshoot. When its value is too high, the system might be over damped.

2018.07

C or

F). For On/off

again. The

SET

Setting Range

Initial

Note

0.1~99.9(%)

5.0

2~1999(Sec)

100

0~399(Sec)

0.1~1.0

0.2

2~199(Sec)

0~3

SouF too low

SouF acceptable

Figure 4. Damp constant

Note 10. Cycle rate (ot): It is the time period (in seconds) that the controller

use to calculate its output. e.g. If ot=2, and the controller output is set to 10%,

the heater will be on 0.2 second and off 1.8 seconds for every 2 seconds.

Smaller ot value result in more precision control. For SSR output, ot is

normally set at 2. For relay or contactor output, it should be set longer to

prevent contacts from wearing out too soon. It normally set to 20~40 seconds.

Note 1 1 . Digital Filter (FILt): FILt=0, filter disabled; FILt=1, weak filtering

effect; FILt=3, strongest filtering effect. Stronger filtering increases the stability

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

temperature.

5.3 Temperature setting and Alarm setting (accessed by code 0001)

The temperature and alarm parameters are listed in table 4. To change the

parameters, press

, enter code "0001" an d press

SET

parameter flow chart is similar to Figure 3.

Table 4. Temperature and alarm parameters

Sy mbol

Description

Target temperature(Set Value)

AH1

J1 on temperature

AH1

AL1

J1 off temperature

AL1

AH2

J2 on temperature

AH2

AL2

J2 off temperature

AL2

END

Note 12. There are two ways to set the target temperature.

a. During the normal operation mode, press

display from PV to set value. The display will start to blink. Press

again to increase or decrease the SV. When finished, wait 8 seconds and the

settings will take effect automatically (the display will stop blinking).

b. Press

key once. Use

SET

key to confirm, then the display would be SV (Su). Press

SET

to display the SV setting. Use

and press

to confirm. Press

SET

press

to exit. You can also ignore the steps after confirmation of SV. The

SET

controller will returns to normal operation mode automatically if no key is

pressed for 1 minute.

Note 13. Alarm setting. The J1 relay is controlled by parameters AH1 and

AL1. And the J2 relay is controlled by parameter AH2 and AL2. AH1 (or AL2)

is the temperature to turn the J1 (or J2) relay on; AL1 (or AL2) is the

temperature to turn the J1 (or J2) relay off. When AH1>AL1 (or AH2>AL2), the

J1 (or J2) alarm is set for absolute high alarm as shown in Figure 5 below.

When AH1 <AL1 (or AH2<AL2) , the J1 (or J2) alarm is set for absolute low

alarm as shown in Figure 6 below. When AH1=AL1 (or AH2=AL2), the J1 (or

J2) alarm is deactivated.

Please note that J2 can't be used as alarm when Outy is set to 1, 4 or 5.

AH1

AL1

Relay on

Figure 5. Absolute high alarm

6. Auto-Tuning

The auto-tuning function (also called self tuning) can automatically optimize

the PID parameters for the system. The auto-tuning function will use the On/

off mode to heat up the system until it passes the set point. Then let it cool

down. It will repeat this about three times. Based on the response time of the

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SouF too high

again. The

SET

Initial Setting

800

900

800

900

Ex it

once to switch the

and

keys to enter code 0001. Press

SET

and

keys to enter the new SV value

key to change the display to END. Then,

AL1

AH1

Relay on

Figure 6. Absolute low alarm

Note

key again

P3/5