Setting Failsafe Mode; Setpoint Rate/Ramp/Program Overview; Table 4-23 Procedure For Setting A Failsafe Mode - Honeywell UDC2500 Product Manual

4.17 Setting Failsafe Mode

Introduction
You can set the Failsafe Mode to be Latching or Non-Latching.
Set Failsafe Mode

Table 4-23 Procedure for Setting a Failsafe Mode

Step Operation
Select Control
1
Set-up Group
Select Failsafe
2
Function Prompt
3 Select a value
4 Return to Normal
Display

4.18 Setpoint Rate/Ramp/Program Overview

Introduction
The Setpoint Ramp configuration group lets you enable and configure any of the
following:
• SPRATE – a specific rate of change for any local setpoint change. (Subsection 4.20)
• SPRAMP – a single setpoint ramp that occurs between the current local setpoint and
a final local setpoint over a time interval of 1 to 255 minutes. (Subsection 4.19)
• SPPROG – a ramp/soak profile in a 12-segment program. (Subsection 4.21)
This section explains the operation of each selection and configuration reference where
necessary.
PV Hot Start
This is a standard feature. At power-up, the setpoint is set to the current PV value and
the Rate or Ramp or Program then starts from this value.
4/07
Press
Until you see:
Setup Setup
Upper Display = SET
Lower Display = CONTRL
You will see:
Function Function Function
Upper Display =
LACH (Controller goes to manual and output goes to
NO L (Controller mode does not change and output goes
Lower Display = FSMODE
To select a failsafe mode in the upper display.
or
At power up, the output will go to the value set.
Lower Lower Lower
Display Display Display
UDC2500 Universal Digital Controller Product Manual
Monitoring and Operating the Controller
Result
failsafe value)
to failsafe value)
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