Watlow PPC-2000 - Manual (Page 140)

Chapter 3: Operating with AnaWin 3 PPC-2000 User’s Guide
116 Watlow Anafaze Doc.# 30002-00 Rev 2.3
Set Point
The set point is the desired value for the process variable. Use
this field to enter a set point for the selected channel. If the set
point entered is out of the defined range, the controller assigns
the closest number within the range.
Range: same as the range of the input type selected. See Table
3.14 on page 130.
Process Variable
This field shows the actual value measured by the sensor
attached to the input selected in the PV Source field for the
channel. The process variable is used in the channel’s feedback
calculation. This field is read-only.
Range: same as the range of the input type selected. See Table
3.14 on page 130.
Control Mode
This parameter indicates the mode of control:
• Off — Select this option to turn off closed-loop control. Any
associated output will not be set by the closed-loop control
program and cannot be set manually or by a logic program.
• Manual — Output is set by the user or a logic program. See
Heat Output% and Cool Output% earlier in this section.
• Auto — Output is determined by the PID or on/off control
algorithm.
• Tune — The loop determines and sets its proportional band,
derivative and integral parameters by setting the output
and measuring the system’s response. See Autotuning on
page 93.
Heat Output%
Enter a heat output value in percent when the channel is in
manual control mode, or monitor the output in automatic
control. For PID output types, the output is calculated based on
the heat PID parameters.
Range: 0.0% to 100.0%
Cool Output%
Enter a cool output value in percent when the channel is in
manual control mode, or monitor the output in automatic
control. For PID output types, the output is calculated based on
the cool PID parameters.
Range: 0.0% to 100.0%