Watlow PPC-2000 - Manual (Page 145)

PPC-2000 User’s Guide Chapter 3: Operating with AnaWin 3
Doc.# 30002-00 Rev 2.3 Watlow Anafaze 121
Figure 3.13 Output Scaling (Heat/Cool) Curves
With Lag Curve A or Lag Curve B selected, a PID calculation
results in a lower actual output level than the linear output
requires. This output is used when the response of the system
to the output device is non-linear.
Heat/Cool Output Filter
Use this menu to damp the heat or cool output’s response. The
output responds to a step change by going to approximately
2/3 of its final value within the number of scans set here. A
larger number yields a slower, or more damped, control
response to changes in the calculated output.
Range: 0 to 100 scans; 0 disables the filter
Auto Heat/Cool Limit
Use this menu to limit the control output for a channel’s heat
and cool outputs. This limit may be continuous, or it may be in
effect for a specified number of seconds (see Heat/Cool Limit Time
below). If you choose a timed limit, the heat/cool limit restarts
when the controller powers up and when the channel changes
from Manual to Automatic control. The heat/cool limit only
affects channels under automatic control. It does not affect
channels under manual control.
Range: 0.0% to 100.0%
100
50
70
79
10
44
48
29
62
30
19
90
2
4
36
7
66
27
3
8
13
19
12
100
100
80 80
60 60
40 40
20 20
0
Actual
Output
Applied
(%)
Calculated Closed-Loop Control Action (%)
A
B
Linear