Connect-Tek Transa PRO 17 Manual de instrucciones descargar pdf (Pagina 31)

The ON-OFF control may introduce excessive process oscillation

even if hysteresis is minimized to the smallest. If ON-OFF con-

trol is set (i.e., PB1=0), TI1, TD1, CYC1, OFST, CPB and PL1

will be hidden and have no function to the system. The manual

mode, auto-tuning, self-tuning and bumpless transfer will be dis-

abled too.

Heat only P ( or PD ) control:

Select REVR for OUT1, set TI1 to 0,

SP1 is used to adjust set point value,

TIME is used to adjust the dwell timer

(enabled by selecting TIMR for A1FN

or A2FN). OFST been enabled in case

of TI1=0 is used to adjust the control

offset (manual reset). Adjust CYC1

according to the output 1 type (O1TY).

Generally, CYC1=0.5~2 seconds for

SSRD and SSR, CYC1=10~20 seconds

for relay output. CYC1 is ignored if lin-

ear output is selected for O1TY. O1HY

is hidden if PB1 is not equal to 0.

OFST Function: OFST is measured by % with range

0–100.0%. In the steady state (i.e., process has been stabilized),

if the process value is lower than the set point a definite value, say

5°C, while 20°C is used for PB1, that is lower 25%, then increase

OFST 25%, and vice versa. After adjusting OFST value, the

process value will be varied and eventually coincide with set

point. Using the P control (TI1 set to 0), the auto-tuning and self-

tuning are disabled. Refer to section 3-21 “manual tuning” for the

adjustment of PB1 and TD1. Manual reset (adjust OFST) is not

practical because the load may change from time to time and

often need to adjust OFST repeatedly.

The PID control can avoid this situation.

Heat only PID control: Selecting

REVR for OUT1, SP1 is used to adjust

set point value. TIME is used to adjust

the dwell timer (enabled by selecting

TIMR for A1FN or A2FN). PB1 and TI1

should not be zero. Adjust CYC1

according to the output 1 type (O1TY).

Generally, CYC1=0.5~2 seconds for

SSRD and SSR, CYC1=10~20 seconds

for relay output. CYC1 is ignored if lin-

ear output is selected for O1TY. In most

cases, self-tuning can be used to substi-

tute for auto-tuning. See section 3-19. If

self-tuning is not used (select NONE for

SELF), then use auto-tuning for the new

process, or set PB1, TI1, and TD1 with

historical values. See section 3-20 for

auto-tuning operation. If the control

result is still unsatisfactory, then use

manual tuning to improve control. See

section 3-21 for manual tuning. TEC-

9300 contains a very clever PID and

Fuzzy algorithm to achieve a very small

overshoot and very quick response to

the process if it is properly tuned.

3–4 Heat Only Control continued…

Setup P:

OUT1 =

TI1 = 0

CYC1 (if RELAY,

SSRD or SSR is

selected for

O1TY)

Adjust:

SP1, OFST, TIME

(if enabled),

PB1(≠0), TD1

Setup PID:

OUT1 =

O1TY

CYC1 if RELAY,

SSRD or SSR is

selected for O1TY)

SELF=NONE or

YES

Adjust:

SP1, TIME (if

enabled), PB1(≠0),

TI1(≠0), Td1

Auto-tuning:

Used for new

process during ini-

tial tuning

Self-tuning:

Used for a process

any time.

Manual Tuning:

May be used if

self-tuning and

auto-tuning are

inadequate.

3–5 Cool Only Control

ON-OFF control, P (PD) control,

and PID control can be used for

cool control. Set OUT1 to DIRT

(direct action). The other func-

tions for cool only ON-OFF control, cool only P (PD) control and

cool only PID control are the same as the descriptions in section

3-5 for heat only control except that the output variable (and

action) for the cool control is inverse to the heat control, such as

the following diagram shows:

Refer to section 3-5, in which similar descriptions for heat only

control can be applied to cool only control.

Setup Cool Control:

OUT1 =

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Connect-Tek Transa PRO 17 Manual de instrucciones Pagina 31

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