Watlow PPC-2000 Manual de usuario descargar pdf (Pagina 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

Actual

Output

Applied

(%)

Calculated Closed-Loop Control Action (%)

Linear

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Watlow PPC-2000 Manual de usuario Pagina 145