Honeywell UDC3500 - Page 157

Configuration
3/07 UDC3500 Universal Digital Controller Product Manual 141
Function Prompt
Lower Display
Selections or
Range of Setting
Upper Display
Parameter
Definition
PB PCT
PROPORTIONAL BAND selects units of percent
proportional band for the P term of the PID
algorithm.
Where: PB % = 100 % FS
GAIN
GAIN
GAIN selects the unitless term of gain for the P term
of the PID algorithm.
Where: GAIN = 100 % FS
PB%
MINUTESorRPM
(selection is used for
both loops)
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.
RPM
REPEATS PER MINUTE—The number of times per
minute that the proportional action is repeated by
reset.
MINUTES
MINUTES PER REPEAT—The time between each
repeat of the proportional action by reset.
NOTE 1: Does not apply to Three Position Step Control.
NOTE 2: If controller is in Manual mode when a failure occurs, then the output will maintain its value.
NOTE 3:These selections appear when:
A) Control Algorithm is selected for 3PSTEP.
B) Control Algorithm is selected for PD+MR and Output Algorithm is selected for Position
Proportional.
NOTE 4: Reset limits and Dropoff are not displayed when Three Position Step Control is configured.
NOTE 5: If PV source is one of the Analog Inputs, then the SP HiLIM and SP LoLIM values must be
between the Input High and Input Low values for the input type configured. If the PV source is an Input
Algorithm configured for:
• Carbon Potential; then the SP HiLIM and SP LoLIM values must be between 0.000 and 2.000
• Dewpoint; then the SP HiLIM and SP LoLIM values must be between –50 and +100
• Oxygen; then the SP HiLIM and SP LoLIM values must be between 0 to 40.00
• Weighted Average, Summer, Subtractor, High or Low; then the SP HiLIM and SP LoLIM values
must be between the configured CALC HI and CALC LOW values. CALC HI and CALC LOW can
be set anywhere between –999 and 9999.
• Math A, Math B, Math C or Math D; then the SP HiLIM and SP LoLIM values can be set
anywhere between –999 and 9999 and are not limited to the CALC HI and CALC LOW values