Watlow F4T • 124 • Chapter 5 Function Reference
TRU-TUNE
+
Band
Set the range, centered on the set point, within which TRU-TUNE+ is in effect. This parameter
applies when TRU-TUNE+ is enabled.
Use this function only if the controller is unable to adaptive tune automatically.
Range: 0 to 100
TRU-TUNE
+
Gain
Set the desired responsiveness of the TRU-TUNE+ adaptive control algorithm. This parameter
applies when TRU-TUNE+ is enabled.
The settings ranging from 1 (least aggressive response and least potential overshoot, low-
est gain) to 6, (most aggressive response and most potential for overshoot, highest gain). The
default setting, 3, is recommended for loops with thermocouple feedback and moderate re-
sponse and overshoot potential.
Range: 1 to 6
Disable TRU-TUNE
®
+ Active Level
Choose the signal value at the TDA receiver which disables TRU-TUNE+.
Options:
• High: TRU-TUNE+ is disabled when the signal is on
• Low: TRU-TUNE+ is disabled when the signal is off
Control Mode
Choose the method the control loop uses to set power outputs HT, CL and PWR.
Options:
• Off: power outputs are 0%
• Auto: closed-loop control, the loop adjusts the outputs automatically to make the Pro-
cess Value equal to the Set Point
• Manual: open-loop control, the loop’s power outputs are set according to the Manual
Power setting
Note:
When a PID loop's Control Mode is changed from Manual to Auto. The Manual Power is set
equal to the integral value for a bumpless transition and normal PID action takes over to
control to the Set Point.
Control Mode Active
Displays the current method the control loop is using to set power outputs HT, CL and PWR.
Options:
• Off: power outputs are 0%
• Auto: closed-loop control, the loop adjusts the outputs automatically to make the Pro-
cess Value equal to the Set Point
• Manual: open-loop control, the loop’s power outputs are set according to the Manual
Power setting
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