Auber Instruments SYL-5342P-S Manual de instruções - Página 4

Procurar online ou descarregar pdf Manual de instruções para Controlador de temperatura Auber Instruments SYL-5342P-S. Auber Instruments SYL-5342P-S 10 páginas. Usb ramp and soak pid temperature controller

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AUBER INSTRUMENTS

SET

AL1

al1

200

Alar m 1

SET

AL2

al2

Alar m 2

SET

Input O ffset

SET

Pr oportional constant

SET

500

Integral time

SET

100

Der ivative time

SET

Cycle time

SET

filt

FILT

PV input filter

SET

0.5

Hysteresis Band

SET

Decimal point position

SET

OutH

outh

200

Output high limit

SET

outl

OutL

Output low limit

SET

Figure 4. Flow chart for system parameter menu

5.3.1. Alarm function & parameters

This controller has two alarm output relays: AL1 relay (terminal 1 & 2) and AL2

relay (terminal 13 & 14). AL1 relay is temperature alarm. AL2 relay is program

ending alarm.

This controller has three alarm parameters: AL1, AL2, ALP.

Parameter AL1: Temperature alarm value for AL1 relay. See ALP definition

below.

Parameter AL2: Duration time for program ending alarm. Unit is per seconds.

Available range is 0s to 200s. AL2 is set as 10s, it means once the ramp soak

program is completed, AL2 relay will be triggered continuously for 10s. Then it

will be dropped off.

ALP: Alarm output definition for AL1 relay. The temperature difference to release

the triggered alarm is 0.5° F (parameter CF = 1) or 0.5° C (parameter CF = 0).

2020.06

Auto Tuning

SET

Lock

lock

Configuration Privilege

SET

Input Sensor Type

SET

Op-a

Reserved

SET

Display Temp Unit

SET

alp

ALP

Alar m output definition

SET

Cool

cool

System Function Selection

SET

puh

PuH

1300

Display High Limit

SET

PuL

pul

Display Low Limit

SET

Addr

addr

Communication addr ess

SET

Baud

baud

Communication baud

SET

Table 3. ALP Definition

ALP

Alarm Type

Value

AL1 is disabled

Absolute high

alarm

Absolute low

alarm

Derivation high

alarm

Derivation low

alarm

Band alarm,

PV < SP – AL1 or

direct acting (out

of range alarm)

Band alarm,

reverse acting (in

range alarm)

Legend:

PV: current reading temperature

AL1: Value of parameter AL1

SP: Set temperature in current step (SV).

5.3.2. Input offset "Pb"

Input offset Pb is used to add an offset value to compensate the sensor error or

simply to shift the reading. For example, if the controller displays 2ºC when probe

is in ice/water mixture, setting Pb = -2, will make the shift the temperature reading

to 0ºC.

5.3.3. Control mode

1) PID control mode

Please note that because this controller uses fuzzy logic enhanced PID control

algorithm, the definition of the control constants (P, I and d) are different than

that of the traditional proportional, integral, and derivative parameters.

(1) Proportional constant "P"

Please note that the P constant is not defined as Proportional Band as in the

traditional model. Its unit is not in degrees. A larger constant results in larger and

quicker action, which is the opposite of the traditional proportional band value. It

also functions in the entire control range rather than a limited band.

(2) Integral time "I"

Integral action is used to eliminate offset. Larger values lead to slower action.

Increase the integral time when temperature fluctuates regularly (system

oscillating). Decrease it if the controller is taking too long to eliminate the

temperature offset. When I = 0, the system becomes a PD controller.

(3) Derivative time "D"

Derivative action can be used to minimize the temperature overshoot by

responding to its rate of change. The larger the number, the faster the action.

2) On/off control mode

It is necessary for inductive loads such as motors, compressors, or solenoid

valves that do not like to take pulsed power. It works like a mechanical thermostat.

When the temperature passes hysteresis band (Hy, see section 5.3.6), the

heater (or cooler) will be turned off. When the temperature drops back to below

the hysteresis band, the heater will turn on again.

To use the on/off mode, set P = 0. Then, set Hy to the desired range based on

control precision requirements. Smaller Hy values result in tighter temperature

control, but also cause the on/off action to occur more frequently.

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Alarm ON

Alarm OFF

Condition

PV > AL1

PV < AL1 – 0.5

PV < AL1

PV > AL1 + 0.5

PV > SP + AL1

PV < SP + AL1 – 0.5

PV < SP – AL1

PV > SP – AL1 + 0.5

and

PV > SP + AL1

PV < SP + AL1 -0.5

PV > SP – AL1

PV < SP – AL1 – 0.5

and

PV < SP + AL1

PV > SP + AL1 + 0.5

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