Watlow Series 93 User Manual download pdf (Page 24)

4.6 ■ Setup Watlow Series 93

Setup

NOTE:

Shaded parameters

may not appear,

depending on the

controller’s configu-

ration and model

number.

Operation Parameters

Proportional Band 1 and 2: A proportional band, expressed in degrees or % of

span, within which a proportioning function is active for Output 1 or 2. When

[`Pb1] is set to 0, the unit functions as an on-off control on Output 1 and 2.

[`Pb2] will not appear if [`Pb1] is set to 0 or [`Ot2] is not set to [`Con]. The

switching differential is determined by the [`HSC] parameter.

Range if [`dFL] is set to [``US]: [`Pb1]: 0 to 555°C/0 to 999°F/0 to 999 Units; 0.0

to 55.5°C/0.0 to 99.9°F/0.0 to 99.9 units, [`Pb2]: The same as [`Pb1] except lower

limit is 1 or 0.1. Defaults: [`Pb1] is set to 25°F/2.5°F. [`Pb2] is set to 25.

Range if [`dFL] is set to [``SI]: 0 to 999.9% of span

Defaults: [`Pb1] is set to 3.0% [`Pb2] is set to 3.0%

Reset /Integral 1 and 2: An integral control action for Output 1 or 2 that auto-

matically eliminates offset, or "droop," between set point and actual process tem-

perature. [`rE1]/[`It1]: Will not appear if [`Pb1] is set to 0. [`rE2]/[`It2]:

Appears if [`Pb1] is not set to 0 and [`Ot2] is set to [`Con]. Either reset [``rE]

or integral [``It] will appear depending on how the [`dFL] parameter is set in

the Calibration Menu. See the Appendix.

Range if [`dFL] is set to [``US]: 0 to 9.99 repeats/minute Default: 0.00

Range if [`dFL] is set to [``SI]: 00.1 to 9.99 minutes per repeat Default: 0.00

Rate/Derivative 1 and 2: The rate (derivative) function for Output 1 or Output

Eliminates overshoot on startup, or after the set point changes. [`rA1]/[`dE1]:

Will not appear if [`Pb1] is set to 0. [`rA2]/[`dE2]: Appears if [`Pb1] is not set

to 0 and [`Ot2] is set to [`Con]. Either rate [``rA] or derivative [``dE] appears

depending on how [`dFL] is set in the Calibration Menu.

Range if [`dFL] is set to [``US] or [``SI]: 0 to 9.99 minutes Default: 0.0

Cycle Time 1 and 2: Time for a controller to complete one time-proportioned cycle

for Output 1 or Output 2; expressed in seconds. [`Ct1]: Will not appear if [`Pb1]

is set to 0, or Output 1 is 4-20mA. [`Ct2]: Will not appear if [`Pb1] is set to 0 or

[`Ot2] is not set to [`Con].

NOTE:

The upper display

will always return to

the process value

after 1 minute with-

out key strokes.

{`rE1}

{`It1}

{`rE2}

{`It2}

{`Ct1}

{`Ct2}

{`rA1}

{`dE1}

{`rA2}

{`dE2}

{`Pb1}

{`Pb2}

[``93] Control Set Point

[`Pb1] Proportional Band 1

[`rE1] Reset 1*

[`It1] Integral 1*

[`rA1] Rate 1*

[`dE1] Derivative 1*

[`Ct1] Cycle Time 1*

[`ALO] Alarm Low*

[`AHI] Alarm High*

[`Pb2] Proportional Band 2*

[`rE2] Reset 2*

[`It2] Integral 2*

[`rA2] Rate 2*

[`dE2] Derivative 2*

[`Ct2] Cycle Time 2*

[`CAL] Calibration Offset

[`AUt] Autotune

‰

Operation Menu

* Parameter may not always appear.

Operation Menu

Figure 4.6 -

The Operation Menu.

Entering the Operation Menu

The Operation Menu contains parameters that determine how the controller will con-

trol and operate. These are parameters that users may need to change from time to

time. The Operation Menu is entered by pressing the ‰Advance key. The setting of

the [`LOC] parameter will affect the ability to access this menu.

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Watlow Series 93 User Manual Page 24

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