Honeywell UDC 2300, Product Manual

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Setpoint Rate/Ramp/Program Operation
76 UDC2300 Controller Product Manual 12/00
Contents Definition
Guaranteed soak
All soak segments can have a deviation value of from 0 to ± 99 (specified by
SOK DEV) which guarantees the value for that segment.
Guaranteed soak deviation values >0 guarantee that the soak segment’s
process variable is within the ± deviation for the configured soak time.
Whenever the ± deviation is exceeded, soak timing is frozen.
There are no guaranteed soaks whenever the deviation value is configured to
0, (that is, soak segments start timing soak duration as soon as the soak
setpoint is first reached, regardless of where the process variable remains
relative to the soak segment).
The soak deviation value is the number in engineering units, above or below
the setpoint, outside of which the timer halts. The range is 0 to ± 99.
The decimal location corresponds to input 1 decimal selection.
PV Start
This function determines whether LSP1 or PV is used as the setpoint when the
program is initially changed from HOLD to RUN.
The selections are:
DISABL = When the program is initially changed from HOLD to RUN the
present LSP1 value is captured as the default setpoint. If the program is
terminated or the power cycled before the program has completed, the LSP1
is used as the control setpoint. The beginning segment uses this value as the
initial ramp setpoint.
ENABL = When the program is initially changed from HOLD to RUN the
present PV value is captured and used as the beginning setpoint value for the
ramp segment. If the program is terminated before completion, the setpoint
value will revert back to the PV value captured at the initial HOLD to RUN
transition. If the power is cycled before program completion, upon power-up
the setpoint is set to the PV value at power-up and when the program is
restarted that setpoint value is used initially.
Program state The program state selection determines the program state after completion.
The selections are:
•
DIS = program is disabled (so program value changed to DIS)
•
HOLD = program on hold
Program termination
state
The program termination state function determines the status of the controller
upon completion of the program.
The selections are:
•
LAST = controls to last setpoint
•
FSAF = manual mode and failsafe output.
Reset Program to
Beginning When enabled, this selection allows you to reset the program to the beginning
from the keyboard.