Watlow Series V4T - Manual (Page 16)

Wa t l o w S e r i e s V 4 1 6
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 temper-
ature. [`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 de-
pending 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:
Shaded parameters
may not appear,
depending on the
controller’s configu-
ration and model
number.
[``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 16 -
The Operation Menu.