center of the proportional band, a pulse value of 1 provides an output of one sec- ond on and one second off (50% output). A pulse value of 2 provides an output of one second on and two seconds off (33% out- put). Output at center of band equals one second on, 2(pulse
tun2 Tuning Choice: Select SELF, Pid, SLO, nor, or FASt. SELF The Controller will evaluate the Process and se-
lect the PID values to maintain good control. Lrn2 Select YES or no
YES Start Learning the Process. After the process has been learned the menu item will revert to no.
no Learning will stay in present mode. dFC2 Damping factor, Select OFF, 1 to 7. Sets the ratio of Rate to Reset for the SELF tunE mode. 7 = most Rate. Factory set to 3. For a fast response process the value should be lowered (less Rate). For a slower pro- cess the value should be increased (more
Rate).
Pid Manually adjust the PID values. PID control con- sists of three basic parameters, Proportional Band (Gain), Reset Time (Integral), and Rate Time (Derivative).
Pb2 Proportional Band (Bandwidth). Select 1 to 9999 °F, °C, or counts.
rES2 Automatic Reset Time. Select OFF, 0.1 to
99.9minutes. Select OFF to switch to OFS2. OFS2 Manual Offset Correction Select OFF, 0.1 to
99.9%. Select OFF to switch to rES2. rtE2 Rate Time. Select OFF, 0.01 to 99.99 min-
utes, Derivative.
SLO PID values are preset for a slow response pro- cess.
nor PID values are preset for a normal response process.
FASt PID values are preset for a fast response process.
ArS2 Anti- Reset Windup Feature: Select On or OFF.
On Reset Offset value will be cleared to 0% when the process input is not within the Proportional Band.
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