Honeywell UDC3500 Product Manual page 124

Configuration
Function Prompt
Lower Display
C1 RANGE
108
Selections or
Range of Setting
Upper Display
50 PCT
100PCT
4-20mA
0-20mA
UDC3500 Universal Digital Controller Product Manual
Parameter
Definition
CURRENT DUPLEX RANGE (SPLIT)—Split the
Control Output across two physical outputs. This
setting should be used for Relay/Current and
Current/Relay Duplex Outputs.
This setting should also be used when
Current/Current Duplex operation is desired. This
enables one current output to provide heat control
and another current output to provide cool control.
To enable Current/Current Duplex (split) operation:
• The Second Current Output or the Third Current in
the Options Set Up group must be selected for
Output.
• The Current Output selected (Second or Third) is
scaled as desired for 0-50 % controller output.
• Deadband for this configuration only applies to the
First Current Output. The other Current Output
must have the Deadband scaled in.
FOR EXAMPLE:
Current Duplex (split) using the First and Second
Current Outputs. 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
First Current Output. In the Options group, set
Second Current Output actuation to OUTPUT, the
Second Current Output LOW VAL to 49.0 and the
HIGH VAL to 0.0.
CURRENT DUPLEX RANGE (FULL) —Enables the
First 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 %.
A second current output is not required for this type
of duplex operation.
CURRENT OUTPUT RANGE 1 —Allows the user to
easily select 4-20 mA output or 0-20 mA output
operation without the need for recalibration of the
controller.
ATTENTION Changing the Current Output Range
will result in the loss of Field Calibration values and
will restore Factory Calibration values.
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