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4/00 UDC 3300 Process Controller Product Manual 85
4.4 Setpoint Ramp/Rate/Programming Set Up Group
Introduction
This data deals with enabling Single Setpoint Ramp function or Setpoint
Rate on one or both control loops. You can start or stop the single SP
Ramp by pressing the RUN/HOLD key.
A single setpoint ramp can be configured to occur between the current
local setpoint and a final local setpoint over a time interval of from 1 to
255 minutes.
There is also a configurable rate of change for any local setpoint change.
ATTENTION SP RAMP and SP RATE will probably cause the SP portion
of Accutune to abort. PV Tune will continue to function normally;
however, during tuning (TUNE configuration) SP Ramp and Program are
placed into HOLD until tuning completes.
SP Ramp/Rate/
Programming group
prompts
Table 4-3 lists all the function prompts in the Setpoint Ramp/Rate Set Up
group and their definitions.
Table 4-3 Setpoint Ramp/Rate Group Definitions
Lower Display
Prompt
Upper Display
Range of Setting
or Selection
Parameter
Definition
SP RAMP*
*SP Ramp parameters
(TIME MIN and FINAL
SP) appear when Ramp
is enabled and SP Rate
and SP Programming
are disabled.
DISABL
ENABLE
ENABL2
ENAB12
SINGLE SETPOINT RAMP—Make a selection to enable
or disable the setpoint ramp function. Make sure you
configure a ramp time and a final setpoint value.
SP Rate and SP Programming must be disabled.
DISABLE SETPOINT RAMP—Disables the setpoint ramp
option.
ENABLE SETPOINT RAMP—Allows the single setpoint
ramp prompts for Loop 1 to be shown.
ENABLE SETPOINT RAMP 2—Allows the single setpoint
ramp to run in Loop 2.
ENABLE SETPOINT RAMP 12—Allows the single
setpoint ramp to be run on Loop 1 and Loop 2.
TIME MIN
0 to 255 minutes SETPOINT RAMP TIME—Enter the number of minutes
desired to reach the final setpoint. A ramp time of “0”
implies an immediate change of setpoint.