Function Prompts - Honeywell UDC2300 Product Manual

12.2 Function Prompts

Introduction
The reference data is organized in alphabetical order by the Function Parameter
identification label and referenced by a subsection number.
12.2.1 0 PCT
This prompt is part of the Options Set Up Group.
This selection uses a value in engineering units to represent AUXOUT except output
which is in percent (%).
Range of setting:
12.2.2 100 PCT
This prompt is part of the Options Set Up Group.
This selection uses a value in engineering units to represent AUXOUT except output
which is in percent (%).
Range of setting:
12.2.3 4-20 RG
This prompt is part of the Algorithm Set up group.
Used with Output Algorithm selections CURD, CURT, or TCUR.
Selections
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 Out.
• 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 4mA VAL selection to 49.0 and the 20mA 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.
12/00
(AUXILIARY OUTPUT LOW SCALING FACTOR)
within the range of the selected variable to represent 4 mA.
(AUXILIARY OUTPUT HIGH SCALING FACTOR)
within the range of the selected variable to represent 20 mA.
(CURRENT DUPLEX RANGE
Definitions
UDC2300 Controller Product Manual
Function Parameter Reference Guide
)
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