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Configuration
66 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
FSMODE 817
FAILSAFE MODE
No L
0
NON LATCHING—Controller stays in last
mode that was being used (automatic or
manual); output goes to failsafe value.
(NOTE 1, NOTE 2)
LACH
1
LATCHING—Controller goes to manual
mode; output goes to failsafe value. (NOTE
2)
PBorGN 818
PROPORTIONAL BAND UNITS—Select
one of the following for the Proportional (P)
term of the PID algorithm:
GAIN 0
GAIN selects the unitless term of gain for the
P term of the PID algorithm.
Where: GAIN = 100 % FS
PB%
PB 1
PROPORTIONAL BAND selects units of
percent proportional band for the P term of
the PID algorithm.
Where: PB % = 100 % FS
GAIN
MINRPM 819
RESET UNITS—Selects units of minutes per
repeat or repeats per minute for the I term of
the PID algorithm.
20 Repeats per Minute = 0.05 Minutes per
Repeat.
MIN 0
MINUTES PER REPEAT—The time
between each repeat of the proportional
action by reset.
RPM 1
REPEATS PER MINUTE—The number of
times per minute that the proportional action
is repeated by reset.
NOTE 1: Does not apply to Three Position Step Control.
NOTE 2: If controller is in Manual upon failure, output will maintain its value at time of failure.
NOTE 3: These selections appear when the Control Algorithm is selected for 3PSTEP.
NOTE 4: The local setpoint will automatically adjust itself to be within the setpoint limit range. For
example, if SP = 1500 and the SP HiLIM is changed to 1200, the new local setpoint will be 1200.
NOTE 5: Reset limits and Dropoff are not displayed when Three Position Step Control is configured.