Single Display Functionality - Honeywell UDC 2300 User Manual

Operation

4.3 Single Display Functionality

Introduction
A UDC2300 instrument, which has been configured with a '0' for software
options (i.e., DC230x-xx-x0-xx), will only have a single display capability. This
means that the displayed value of PV, Setpoint, Setpoint2, Remote Setpoint,
Input 2, Output, Bias, Aux Out, and Deviation will appear on the top display and
a prompt identifying the value will appear on the bottom display.
Access the Values
Pressing the display key will cycle through all applicable values (configuration
dependent). One minute after the last press of the display key, the display will
revert to a configured default display. The default display is configured in the
Input 1 Setup Group, and has three selections:
Active Setpoint (SP)
Process Variable (PR Y)
Process Variable with no bottom display prompt (PR n).
Exceptions
There are three exceptions to the above rules:
The displays for PID SET, Timer and Setpoint Ramp will appear the same as on
a dual display model and, when displaying Timer or Ramp values, the default
display switchover feature is disabled.
Auto-only Mode
The single display model is Auto only mode. The Auto/Manual key has no effect
on controller mode. As a result of this, the Failsafe mode is always non-latching.
While a Failsafe condition exists, the controller output will assume the Failsafe
value. When the Failsafe condition goes away, normal automatic operation
continues.
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