Watlow Series 920 Microprocessor-Based Ramping Control - Manual (Page 71)

MANUAL:
MN:
Offset:
ON/OFF control:
Open loop:
Operating band:
OUT:
Output:
Overshoot:
PB C:
PB H:
P control:
Parameter:
Proportioning control.
A physical property whose value determines the response of
an electronic control to given inputs.
PD control:
PI control:
Proportioning control with rate action.
Proportioning control with auto-reset.
Appendix WATLOW Series 920 User's Manual 71
When ACCESS (3) is selected under the SETUP mode of the
Series 920, the MANUAL parameter appears.
The MIN parameter has three meanings depending upon which
parameter you are in.
PROGRAM menu - The number of minutes that equal total
step time to achieve the temperature of the Series 920.
Under the AUTOSTART step type in the PROGRAM menu, it
represents the minutes that the 920 will wait for on the time-of-
day clock before AUTOSTART takes place.
SETUP menu - The SYSTEM 24 hour time-of-day clock
setting.
Adjustment to actual input temperature and to the temperature
values the Series 929 uses for display and control.
Control of temperature about a set point by turning the output
full ON below set point and full OFF above set point in the heat
mode.
Control system with no sensory feedback The 920 uses a
closed loop.
The area around set point in the Series 920 where ACTUAL
temperature is deemed safe, or “OK”. The band is defined
under ACCESS (5), SPCLFUNC, under the SETUP menu by
Alarm types (ALTYP1 and ALTYP2) and under ACCESS (O),
CALIB, by Alarm High and Low Limit Points (A1 H, A1L and
A2H, A2L.)
Select an output type. Action in response to the difference
between set point and process variable. This parameter will
not appear if DIP switch #7 is ON.
Action in response to difference between set point and process
variable.
Condition whereby temperature exceeds set point due to initial
power up or process changes.
A temperature band expressed in degrees within which a
temperature controller proportioning function is active for
cooling. This parameter will not appear if OUT = HT.
A proportional temperature band expressed in degrees within
which a temperature controller proportioning function is active
for heating. Expressed in degrees. This parameter will not
appear if OUT = CL.