Setpoint Rate/Ramp/Program Operation
62 UDC2300 Universal Digital Controller User Manual 4/00
Table 5-2 Program Contents
Contents Definition
Ramp Segments
A ramp segment is the time or rate of change it takes to change the
setpoint to the next setpoint value in the program.
• Ramps are odd number segments.
• Ramps are configured in either Time or Engineering Units per Minute
or EU per Hour (see Ramp Unit below).
ATTENTION
Entering “0” will imply an immediate step change in
setpoint to the next soak.
Ramp Unit
The Ramp Unit selection determines the engineering units for the ramp
segments.
The selections are:
• TIME = Hours:Minutes (XX:XX) Range: 0-99 hrs: 0-59 min
• EU-H = Degrees/Hour OR EU-M = Degrees/Minute (Range – 0-999)
Soak Segments
A Soak Segment is a combination of Soak Setpoint (value) and a Soak
Time (duration)
• Soaks are even number segments.
• The Soak Setpoint value must be within the setpoint high and low
range limits in engineering units.
• Soak Time is the duration of the soak and is determined in:
TIME - Hours:Minutes Range = 0-99 hrs:59 min.
Start Segment
The Start Segment number designates the first Ramp segment.
Range = 1 to 11
End Segment
The End Segment number designates the number of the last Soak
segment. Range = 2 to 12
Recycle number
The Recycle number allows the program to recycle a specified number
of times from beginning to end. Range = 0 to 99
Guaranteed soak
All soak segments can have a deviation value of from 0 to ± 99
(specified by SOK DEV) which guarantees that value for that segment
time.
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.
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.
The guaranteed soaks feature is disabled whenever the deviation value
is configured to 0.
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