RKC INSTRUMENT COM-JC Manual de usuario descargar pdf (Pagina 3)

Features

Temperature/Process Controller FB900/400

PID control algorithm is selectable in the FB Series to achieve

the most precise control for various applications.

PV Derivative PID : suitable for fixed setpoint control (Factory

setting)

Deviation Derivative PID : suitable for ramp control using ramp-

to-setpoint function and cascade control.

Selectable sampling time makes the FB Series suitable for any

application ranging from pressure control requiring fast

response to precise control requiring highest resolution. The

selections are 100ms (factory setting) usually suitable for most

of standard applications, 50ms for fast response applications,

and 250ms for precise control requiring high-resolution. The PID

parameters can be set in 1/10 unit which supports fast and

accurate control. Ramp-to-setpoint and output-change-limiter

functions are each settable for UP and DOWN so that a special

heater can be controlled precisely.

Advanced Heat/Cool PID algorithm achieves stable control by

the Undershoot Suppression (USS) function, and independent

P-I-D settings for both Heat and Cool which are effective for

applications with strong cooling gain. Control Response type

selection is settable to avoid overshoot at start-up and against

external disturbance. The FB Series also offers selection of

water cool and air cool PID control algorithm.

The control type is configurable among Heat, Cool, Heat/Cool,

and position proportioning.

Brilliant II PID Control

200

SV PV

100

200

SV PV

100

FAST

MEDIUM

SLOW

SV SV

PV PV

PV derivative type PID control

Deviation derivative type PID control

Overshoot

Hunting

Most adaptive to conventional

fixed value control

Follow-up

Most adaptive to

conventional

fixed value control

250ms sampling controller

50ms sampling controller

1 sec 1 sec

(˚C) (˚C)

Control response parameter

USS (Under Shoot Suppression) gain

USS gain : Small

USS gain : Large

* USS setting range : 0.000 to 1.000

Only execution at

power ON

Only execution at

SV change

Execution at power ON and

SV change

AT function when limiter is effective.

AT function when limiter is not effective.

Tuning

Power ON

SV2

SV1

SV2

SV1

SV change

Power ON

SV change

AT output limiter

High

AT output limiter

Low

Output 100%

Output 0%

Output 100%

Output 0%

AT ON AT ON

Selectable PID control algorithm

The improved Autotuning alrogithm calculates optimum PID

parameters. For Heat/Cool control, PID parameters for both

sides (Heat and Cool) are calculated.

Autotuning

Autotuning to calculate optimum PID parameters

Output limiters high and low for autotuning enables autotuning

to be used with any application in which the output has to be

within limited range, even during autotuning. High and low are

independently settable.

Output limiters high and low for autotuning

Start-up tuning eliminates time required for conventional

autotuning as it calculates optimum PID values by temperature

characteristics at start up. It is useful in applications which

require a long time for conventional autotuning. The timing of

activation of start-up tuning can be selected from at power-up,

at setpoint change, and at power-up/setpoint change. It is also

settable to Only-once or always-ON.

Start-up tuning to eliminate time for autotuning

Selectable sampling time among 50ms, 100ms, and 250ms.

Advanced Heat/Cool PID algorithm with Undershoot

Suppression

Configurable control type

• Startup tuning is not available with Heat/Cool PID control type.

• Validity/invalidity of the startup tuning function can be set.

• Heater power needs to be turned on simultaneously with or before turning on power

to the temperature controller.

• If start-up tuning does not calculate suitable PID values due to characteristics of

application, use Autotuning function.

3FB_01E

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RKC INSTRUMENT COM-JC Manual de usuario Pagina 3

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