Watlow PPC-2000 - Manual (Page 210)

Chapter 5: LogicPro and Modbus Reference PPC-2000 User’s Guide
184 Watlow Anafaze Doc.# 30002-00 Rev 2.3
Heat/Cool Cycle Time
Specify the time base in seconds for time proportional outputs.
The output percentage is proportioned over this time period.
For example, a 50% output with a 10-second cycle time is on for
5 seconds and off for 5 seconds. Output cycle time only affects
control when the corresponding output type is set to Digital Time
Proportioning (Time Prop).
Heat/Cool Scale Lo
A control output may be linearly scaled by setting this
parameter. Set the percent of the output range of the selected
Heat/Cool Output Type that should correspond to a calculated Heat/
Cool Output% of 0%.
This parameter is set in tenths of a percent. The valid range is
0 to 1000 and corresponds to 0.0% to 100.0%: for example, a
setting of 500 corresponds to 50.0%.
Heat/Cool Scale Hi
A control output may be linearly scaled by setting this
parameter. Set the percent of the output range of the selected
Heat/Cool Output Type that should correspond to a calculated Heat/
Cool Output% of 100%.
This parameter is set in tenths of a percent. The valid range is
0 to 1000 and corresponds to 0.0% to 100.0%: for example, a
setting of 500 corresponds to 50.0%.
Heat/Cool Curve
Use this register to choose which output scaling method is
used. Straight linear is used for most applications. Lag curves
are usually used in plastic extruder applications. Table 5.21 on
page 184 lists and describes the values to which this parameter
may be set. Figure 5.2 on page 185 illustrates the effects of the
options.
Table 5.21 Heat/Cool Curve
Value
AnaWin3
Name
Description
0
Straight lin-
ear
Output is unaffected and is set as
calculated by the closed-loop PID
calculation.
1 Lag curve A
Output is reduced somewhat from
calculated value.
2 Lag curve B
Output is further reduced from
calculated value.