Dwyer 2600 - Manual (Page 27)

May, 2013 Page 27 of 52 949-1194 Rev. 7
d F A C Damping factor, Select O F F , 1 to 7. Sets the ratio of Rate to
Reset for the S E L F t u n E mode. 7 = most Rate. Factory set to
3. For a fast response process the value should be lowered
(less Rate). For a slower process the value should be
increased (more Rate).
P i d Manually adjust the PID values. PID control consists of three basic
parameters, Proportional Band (Gain), Reset Time (Integral), and Rate
Time (Derivative).
# P b 1 (Option 948, 4-Stage Set Point) or
P b 1 Proportional Band (Bandwidth). Select 1 to 9 9 9 9 °F, °C, or
counts.
P b 2 Proportional Band (Bandwidth). Select 1 to 9 9 9 9 °F, °C, or
counts. Appears only if control is equipped with second set
point and O u t 2 is NOT selected as O n O F .
# r E S (Option 948, 4-Stage Set Point) or
r E S Automatic Reset Time. Select O F F , 0 . 1 to 9 9 . 9 minutes. Select
O F F to switch to O F S .
# O F S (Option 948, 4-Stage Set Point) or
O F S Manual Offset Correction Select O F F , 0 . 1 to 9 9 . 9 percent.
Select O F F to switch to r E S .
# r t E (Option 948, 4-Stage Set Point) or
r t E Rate Time. Select O F F , 0 . 0 1 to 9 9 . 9 9 minutes, Derivative.
S L O PID values are preset for a slow response process.
n o r PID values are preset for a normal response process.
F A S t PID values are preset for a fast response process.
P i d 2 Linkage of PID parameters between SP1 and SP2: Select O n or O F F .
O n
Applies SP1 r E S , r t E , F b n d , and F r t E terms to SP2 for heat/cool
applications.
O F F SP2 functions without r E S , r t E , F b n d and F r t E .
A r U P Anti- Reset Windup Feature: Select O n or O F F .
O n
When A r U P is O n the accumulated Reset Offset value will be cleared to
0% when the process input is not within the Proportional Band.
O F F When A r U P is O F F , the accumulated Reset Offset Value is retained in
memory when the process input is not within the Proportional Band.