Honeywell 9782 Series manual Cell1

Conductivity/Resistivity Analyzer/Controller

5.5Configuring On/Off, Duration Adjusting Type (DAT), or Pulse Frequency Type (PFT) Control

Purpose

During I/O setup you had an opportunity to specify whether to use one or more relays to achieve control of a process variable with a discrete control strategy: On/Off, DAT or PFT.

On/Off control can be implemented based on any measured or computed value.

Cell1

DAT and PFT control can be based on Cell 1 input, Cell 2 input, the computed ratio Cell2 , or the computed difference Cell1 − Cell2 .

If you specified one or more of these discrete control types during I/O setup, you will be able to configure the related parameter values.

For a discussion of tuning proportional control (applicable to PFT and DAT control) see Appendix A.

Procedure

The procedure for configuring On/Off control is shown in Table 5-3.

The procedure for configuring PFT control is shown in Table 5-4.

The procedure for configuring DAT control is shown in Table 5-5.

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