Watlow Electric 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
Set Point: Sets the operating set point for Output 1. Represents the process value
the system tries to achieve for Output 1. "SP" does not appear on the lower display.
The control set point value is displayed and can be incremented or decremented
without pressing the ‰Advance key. The lower display may be blank if [`dSP] is set
to [`Pro]
. In a ramping mode, the lower display alternately flashes the desired end
set point and [``rP] .
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 5.5°C/0.0 to 9.9°F/0.0 to 9.9 units, [`Pb2]: The same as [`Pb1] except lower
limit is 1 or 0.1. Defaults: [`Pb1] is set to 2.5°C/25°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]
.
[``SP}
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.