Honeywell UDC2500 - Page 67

Configuration
4/07 UDC2500 Universal Digital Controller Product Manual 53
Function Prompt
Lower Display
Selection or Range of Setting
Upper Display
English Numeric
Code
English Numeric
Code
Parameter
Definition
50
CURRENT DUPLEX RANGE (SPLIT)—This
setting should be used for Relay/Current and
Current/Relay Duplex Outputs. It can also be
used for Current Duplex when an Auxiliary
Output board is present. This enables the
normal control current output to provide heat
control and the auxiliary current output to
provide cool control. To enable this:
• AUX OUT in the Options Set Up group
must be selected for Output.
• The Auxiliary Current Output is scaled as
desired for 0-50 % controller output.
• Deadband for this configuration only
applies to the Current Output. The
Auxiliary Output must have the Deadband
scaled in.
FOR EXAMPLE:
If a 2 % Deadband is desired, then enter 2.0
for the Deadband selection in the Control
Algorithm group. This will apply Deadband to
the Current Output. In the Options group, set
the Auxiliary Output LOW VAL selection to
49.0 and the HIGH VAL selection to 0.0.
100
CURRENT DUPLEX RANGE (FULL)
enables the Current Output to provide both
heat and cool functions for control over 0-
100 % of the controller output. The PID heat
parameters apply when the output is greater
than 50 % and the PID cool parameters
apply when the output is less than 50 %. The
second current output is not required for this
type of duplex operation.