Honeywell UDC2500 - Page 66

Configuration
52 UDC2500 Universal Digital Controller Product Manual 4/07
Function Prompt
Lower Display
Selection or Range of Setting
Upper Display
English Numeric
Code
English Numeric
Code
Parameter
Definition
CUR
2
CURRENT SIMPLEX—Type of output using
one 4 mA to 20 mA signal that can be fed
into a positive or negative grounded load of 0
to 1000 ohms. This signal can easily be
configured for 4-20 mA or 0-20 mA operation
via the CRANGE configuration, below.
RLYD
3
TIME DUPLEX—This output algorithm uses
Digital Outputs 1 and 2 for Duplex Time
Proportional Control. The outputs are
updated per the Loop sampling rate
selection. Time Proportional Output has a
resolution of 4.44 msec. Cycle Time is
adjustable from 1 second to 120 seconds.
CURD
4
CURRENT DUPLEX is similar to current
simplex but uses a second current output.
The second output is usually scaled so that
zero and span correspond with 0 % and
50 % output (cool zone). When the output is
0 % to 50 %, the controller uses tuning
parameter set #2, when the output is 50 % to
100 % it uses set #1.
ATTENTION Other prompts affected: 4-20
RNG
CURT
5
CURRENT/TIME DUPLEX is a variation of
duplex with current active for 0 % to 50 %
output (tuning set 2) and time is active 50 %
to 100 % output (tuning set 1).
Relay controls heat, current controls cool.
ATTENTION Other prompts affected: 4-20
RNG
TCUR
6
TIME CURRENT DUPLEX is similar to CUR
TI except that current is active for 50 % to
100 % and time is active for 0 % to 50 %.
Relay controls cool, current controls heat.
ATTENTION Other prompts affected: 4-20
RNG
CRANGE 502
4-20
0-20
0
1
CURRENT OUTPUT RANGE allows the
user to easily select 4-20 mA output or 0-20
mA output operation without the need for
recalibration of the instrument.
OUTRNG 504
CURRENT DUPLEX RANGE ALGORITHM
— Used with Output Algorithm selections
CURD, CURT, or TCUR.