Temperature Setpoint (V5001) - FACTS Engineering Direct Logic 405 Manual

Usage of Mode Bits
Turn on bit 0 whenever any of the PID or alarm setup parameters are changed. The Temperature
Controller automatically clears this bit after the new setup parameters have been loaded.
Turn off bit 1 if heating control action is required. This will cause the output to increase when the
temperature is below the SetPoint. Turn on bit 1 for cooling control. In this case, the output will increase
when the temperature is above the SetPoint.
Turn on bit 2 for temperature units of degrees C. All temperature units have a single implied decimal
point and are in the range -3276.7 to +3276.7. Negative values appear as values greater than 32768
(8000H).
Turn on bit 3 when the controller output commands an analog output module.
Turn on bit 4 for PID mode. See page 5.2 for a description of ON/OFF and PID control modes.
Turn on bit 5 to enable the Deviation Alarm. See page 2.18 for a description of the Deviation Alarm.
Turn on bit 6 to enable clamping of the SetPoint. For the loop 1 example, these are the values at V5015
(low limit) and V5016 (high limit).
Turn on bit 7 to enable heater current alarms. Open and shorted heater outputs can be detected when
an external current transformer is used.
Turn on bit 8 to enable automatic calculation of the PID controller settings. The Temperature Controller
automatically clears this bit when Auto Tune is done. Clear this bit to turn off Auto Tune prematurely.
Turn on bit 9 to Auto Tune for proportional and integral (PI) control only. This forces the PID Rate term
to zero.
Turn on bit 10 to select an Auto Tune algorithm which will calculate PID controller settings optimized for
minimal oscillation. When off, the calculated settings will be optimized for fastest response. Most
temperature control applications should be auto tuned with this bit off. If on, the size and duration of the
Auto Tune caused process disturbance is greatly increased.
Turn on bit 14 to force off the controller output. Turn on bit 15 to force the output on. Auto Tune is
canceled and PID control is disabled if either of the over-ride bits are on. To provide a bumpless transfer
from manual to automatic mode, it may be necessary to manually change the bias value (V5002).

Temperature SetPoint (V5001)

The Temperature SetPoint is the temperature you want the Process to be at. This location is continually
read by the temperature controller.
2.14 INSTALLATION AND WIRING