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164 UDC 3300 Controller Product Manual 4/00
5.9 Single Setpoint Ramp
Configuring the
setpoint ramp
You can configure a single setpoint ramp to occur between the current
local setpoint and a final local setpoint over a time interval of from 1 to
255 minutes. You can RUN or HOLD the ramp at any time.
ATTENTION
The UDC 3300 has PV Hot Start functionality as standard
feature. This means that at power-up Local Setpoint #1 is set to the current
PV value and the Ramp, Rate, or Program then starts from this value.
Procedure
Table 5-14 lists the procedure for configuring the Setpoint Ramp
parameters. The procedure for SP Program is in Section 6 – Setpoint
Programming Option.
Table 5-14 Procedure for Configuring a Setpoint Ramp
Step Operation Press Action
1
Select
SP RAMP
Set Up Group
SET UP
until you see:
SP RAMP
Lower Display
SET UP
Upper Display
2
Select the
Setpoint Ramp
function
FUNCTION
L1/L2
until you see:
SP RAMP
Lower Display
Upper Display
DISABL—Disables SP Ramp
ENABLE—Enables SP Ramp for Loop 1
ENABL2—Enables SP Ramp for Loop 2
ENAB12—Enables Sp Ramp for
Loops 1 and 2
3
Enable Setpoint
Ramp
to enable the setpoint ramp function. Choose
the loop(s) on which you want the ramp to
operate.
ATTENTION
You cannot change the
current local setpoint if the setpoint ramp
function is enabled. Make sure SP RATE is
disabled.
4
Set the Ramp
Time
FUNCTION
L1/L2
until you see:
Lower Display
Upper Display
TIME MIN
The ramp time
in minutes
or
to change the upper display value to the
number of minutes in which you want the
final setpoint to be reached.
Setting Range = 1 to 255 minutes
ATTENTION
Entering “0” will imply an
immediate step change to the final SP.