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
92 Chapter 7 535 User's Manual
Applications
3. Set the PRETUNE parameter to TYPE 2 or TYPE 3.
4. DO NOT Enter values for NOISE BND and RESP TIME. The Pretune
algorithm will calculate these values.
2. Make sure that the process is reasonably stable and place the controller
under manual control.
3. Press MENU to access the TUNING menu.
4. Set parameter ADAPTIVE to ENABLED. The Adaptive Tuning cycle does
not begin. The controller is under automatic control.
4. Activate the next parameter, PRETUNE.
5. Press ACK to begin Pretuning.
The 3rd display will show the message EXECUTING.
6. 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 Pretunes TYPE 2 and TYPE 3 with
Adaptive Tune.
Adaptive Tune by Itself
1. Go to the SELF TUNE menu.
2. Set the TYPE parameter to ADAPTIVE.
3. Press MENU to access the TUNING menu.
4. Set the ADAPTIVE parameter to ENABLED. The Adaptive Tuning cycle
does not begin. The controller is under automatic control.
If Pretune results are poor or process conditions do not allow Pretune to run,
the Adaptive Tune parameters can be manually configured. Proper setting of
the noise band and response time parameters will yield excellent adaptive
control without running the Pretune function.
1. Go to the SELF TUNE menu.
2. Set NOISE BND.
The noise band is chosen to distinguish between disturbances which affect
the process and process variable “noise.” The controller functions to
compensate for disturbances (i.e., load changes), but it cannot compensate
CAUTION!
If the process conditions are
temporarily changed, (e.g., during
process shutdown, draining of a tank,
etc.) disable adaptive tuning.
Otherwise, the controller will attempt to
adapt its tuning parameters to the
temporary process conditions.
Disable adaptive tuning by:
1. In the TUNING menu, change
ADAPTIVE to DISABLED through
the keypad; or
2. Closing the appropriate digital input
(see Digital Input section in this
chapter).
NOTE: Adaptive tuning is not
available for velocity position
proportional control.
(SECONDS)
Figure 7.13
Noise Band Calculation Example
–328
400
401
402
403
404
405
752
0
40 80
120
160
200 240
406
407
408
409
PROCESS
VARIABLE
Type T
Thermocouple
Range
–
328°F TO 752° F
NOISE BAND =
(407 – 402)
[ 752 – (–352) ]
X 100 =
.5%
TIME