United Security Products AVD-45c Manual descargar pdf (Pagina 91)

1/03 UDC 6300 Process Controller Product Manual 77

4.4 Setpoint Ramp/Rate 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 ramp by

pressing the FUNC key and the key simultaneously.

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

SPRAMP and SRRATE will probably cause the SP

portion of Accutune to abort. PV Tune will function normally.

Setpoint Ramp/ Rate

group prompts

Table 4-3 lists all the function prompts in the Setpoint Ramp/Rate setup

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

DISABL

ENABLE

ENABLE 2

ENABLE 12

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.

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 — Allows the single

setpoint ramp to run in Loop 2.

ENABLE SETPOINT RAMP — 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 and immediate change of

setpoint.

FINAL SP

Within SP limits

SETPOINT RAMP FINAL SETPOINT — Enter the

value desired for the final setpoint. The controller will

operate at the setpoint set here when ramp is ended.

ATTENTION

If the ramp is on "HOLD", the held

setpoint can be changed by the

or keys.

However, the ramp time remaining and original ramp

rate is not changed. Therefore, when returning to

RUN mode, the setpoint will ramp at the same rate

as previous to the local setpoint change and will stop

if the final setpoint is reached before the time

expires. If the time expires before the final setpoint

is reached, it will jump to the final setpoint.

ATTENTION

SP RAMP and SP RATE will cause

the SP portion of Accutune to abort. PV Tune will

continue to function normally.

Table 4-3 continued on next page

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