Honeywell UDC2500 - Manual (Page 130)

Monitoring and Operating the Controller
116 UDC2500 Universal Digital Controller Product Manual 4/07
RUN/HOLD key
You can start or stop the Ramp or Program using the RUN/HOLD key.
4.19 Setpoint Ramp
Introduction
When you have configured a SETPOINT RAMP, the ramp will 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.
Configuration Check
Make sure
• SPRAMP is enabled
• A Ramp Time (TIMIN) in minutes has been configured
• A final setpoint value (FINLSP) has been configured. See Subsection 3.5 –
Configuration group “SPRAMP” for details.
Operation
Running a Setpoint Ramp includes starting, holding, viewing the ramp, ending the ramp
and disabling it. See Table 4-24.
Table 4-24 Running A Setpoint Ramp
Step Operation Press Result
1 Select Automatic
Mode
M-A
Reset
M-A
Reset
M-A
Reset
“A” indicator is on.
Upper Display = Hold and PV value
Lower Display = SP and Present value
2 Set Start Setpoint
Lower
Display
Lower
Display
Lower
Display
Until start SP value is in lower display
Upper Display = Hold and PV value
Lower Display = SP and start SP value
3 Start the Ramp
Run
Hold
Run
Hold
Run
Hold
You will see
Upper Display = Run and a changing PV value
Lower Display = SP and a changing SP value increasing
or decreasing toward a final SP value
4 Hold/Run the
Ramp
Run
Hold
Run
Hold
Run
Hold
This holds the ramp at the current setpoint value. Press
again to continue.
5 View the
remaining ramp
time
Lower
Display
Lower
Display
Lower
Display
Until you see
Upper Display = RUN or HOLD and the PV value
Lower Display = RP xx HH.MM (time remaining)