Honeywell UDC2500 manual Contents Definition, Ramp unit

			Monitoring and Operating the Controller
Contents			Definition
			Entering “0” will imply an immediate step change in setpoint to
		ATTENTION
		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 hr.:0-59 min
		• EU-H = Degrees/Hour OR EU-M = Degrees/Minute (Range – 0-999)

Soak segments

Start segment number

End segment number

Recycle number

Guaranteed soak

PV Start

A soak segment is a combination of soak setpoint (value) and a soak duration (time).

•Soaks are even number segments.

•Segment 2 will be the initial soak value and soak time.

•The soak setpoint range 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 hr.:59 min.

The start segment number designates the number of the first segment. Range = 1 to 11

The end segment number designates the number of the last segment, it must be a soak segment (even number). Range = 2 to 12

The recycle number allows the program to recycle a specified number of times from beginning to end. Range = 0 to 99

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.

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.

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