Monitoring and Operating the Controller
3/07 UDC3500 Universal Digital Controller Product Manual 245
Configuration Check
Make sure
• SPRAMP is enabled
• SP RATE and SPPROG are not running.
• A Ramp Time (TIMIN) in minutes has been configured
• A final setpoint value (FINLSP) has been configured. See Subsection 3.6 –
Configuration group “SPRAMP” for details.
Operation
Running a Setpoint Ramp includes starting, holding, viewing the ramp, ending the ramp
and disabling it. See Table 4-29.
Table 4-29 Running A Setpoint Ramp
Step Operation Press Result
1
Select Automatic
Mode
Man/Auto
“A” indicator is on.
Upper Display = “H” and PV value
Lower Display = SP and Present value
2
Set Start Setpoint
Lower
Display
Until start SP value is in lower display
Upper Display = “H” and PV value
Lower Display = SP and start SP value
3
Start the Ramp
Run/Hold
You will see
Upper Display = “R” and a changing PV value
Lower Display = SP and a changing SP value increasing
or decreasing toward the final SP value
4
Hold/Run the
Ramp
Run/Hold
This holds the ramp at the current setpoint value. Press
again to continue.
5
View the
remaining ramp
time
Lower
Display
Until you see
Upper Display = PV value
Lower Display = RAMPXXXM (time remaining in
minutes)
6
End the Ramp
When the final setpoint is reached, “R” changes to “H” in
the upper display and the controller operates at the new
final setpoint.
7
Disable SPRAMP
See Section
3 – Configuration group “SPRAMP” for
details.
Power Outage
If power is lost during a ramp, upon power-up the controller will be in HOLD and the
setpoint value will be the setpoint value prior to the beginning of the setpoint ramp.
The ramp is placed in hold at the beginning.
Configure the mode at Set Up Group “CONTROL”, function prompt “PWR MODE”.
See Subsection 3.20 – CONTROL SETUP GROUP Prompts.
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