Watlow Series 93 - Manual (Page 24)

4 . 6 ■ S e t u p W a t l o w S e r i e s 9 3
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
2.
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.