User`s manual
Table Of Contents
- 535 User's Manual
- Table of Contents
- Chapter 1: Introduction
- Chapter 2: Basic Interface
- Chapter 3: Installation
- Chapter 4: Hardware Set Up
- Chapter 5: Software Configuration
- Chapter 6: Tuning
- Chapter 7: Applications
- Control Type
- Alarms
- Duplex Control
- Slidewire Position Proportioning Control
- Velocity Position Proportioning Control
- Staged Outputs
- Retransmission
- Digital Inputs
- Remote Setpoint
- Multiple Setpoints
- Multiple Sets of PID Values
- POWERBACK
- Self Tune–POWERTUNE®
- Ramp-To-Setpoint
- Input Linearization
- Load Line
- Security
- Reset Inhibition
- Process Variable Reading Correction
- Serial Communications
- Cascade Control
- Ratio Control
- Appendix 1: Menu Flowcharts
- Appendix 2: Parts List
- Appendix 3: Troubleshooting
- Appendix 4: Calibration
- Appendix 5: Specifications
- Appendix 6: Glossary
- Appendix 7: Isolation Block Diagram
- Return Procedures and Warranty Information
- 500 Series Process Controllers User's Manual
535 User's Manual Chapter 7 91
Applications
7. The next parameter, TIMEOUT, defines the maximum time in minutes within
which pretune must complete its calculations before it is aborted.
The first time a pretune is performed, set TIMEOUT to its maximum value.
Make note of the length of the pretune cycle. Then, adjust TIMEOUT to a
value about twice the pretune time.
The purpose of this parameter is to prevent a Pretune cycle from continuing
for an excessive time if a problem develops. The value has no impact on
the PID values being calculated.
8. Next is MODE. This defines what mode the controller will enter when pretune
is completed. Select MANUAL if there will be a need to review PID
parameters before attempting to control with them; the default AUTOMATIC.
9. RESP. TIME defines the amount of damping for the process. The choices
include FAST (results in approximately 20% overshoot), MEDIUM (results
in approximately 10% overshoot), and SLOW (<1%).
10.Place the controller under manual control.
11.Access the TUNING menu (press MENU).
Set the first parameter, ADAPTIVE, to DISABLED.
12.Activate the next parameter, PRETUNE.
13.Press ACK to begin Pretuning.
The 3rd display will show the message EXECUTING.
14.When Pretune is complete, the 3rd display will show COMPLETED for two
seconds and then return to the current menu display.
Pretune TYPE 1 & Adaptive Tune
1. Go to the SELF TUNE menu.
2. Set TYPE to BOTH.
3. Set PRETUNE to TYPE 1.
4. Set a value for OUTSTEP.
5. Set NOISE BND parameter.
6. Set the RESP. TIME parameter.
7. Make sure that the process is reasonably stable and place the controller
under manual control.
8. Press MENU to access the TUNING menu.
Set ADAPTIVE to ENABLED. The Adaptive Tuning cycle does not begin
the controller is under automatic control.
9. Activate the next parameter, PRETUNE.
10.Press ACK to begin Pretuning.
The 3rd display will show the message EXECUTING.
11.When Pretune is complete, the 3rd display will show COMPLETED for two
seconds and then return to the current menu display.
The controller will automatically transfer to automatic control upon completion
of Pretune if set to do so, or upon manual transfer.
Figure 7.12 illustrates the operation of Pretune TYPE 1 with Adaptive Tune.
Pretune TYPE 2 or 3 & Adaptive Tune
1. Go to the SELF TUNE menu.
2. Set the TYPE parameter to BOTH.