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
72 Chapter 7 535 User's Manual
Applications
NOTE: Specifying a variable other
than the setpoint (SP) to HIGH
ALARM and LOW ALARM allows for
greater flexibility in creating alarm and
control strategies.
Scroll to parameter D. SOURCE
• For derivative action based on error, or deviation from setpoint, choose
DEVIATION
• For derivative action based on process variable changes, choose PV.
B. ALARMS
The 535 controller has two extremely flexible and powerful software alarms.
The number of available outputs limits how alarms are linked to relays. A Global
Alarm feature allows all alarms to be assigned to the same relay.
The 535 indicates an alarm condition by:
• Lighting up the alarm icon(s)
• Displaying a custom message in the 3rd display
• Illuminating the ACK key (if the alarm is acknowledgeable)
Software Configuration
1. Access the ALARM menu.
2. Set values for the following parameters. All possible values are shown.
ALM.TYPE:1 and ALM. TYPE:2
Specifies the type of alarm to implement. Selection includes:
• HIGH ALARM
High process variable alarm. Occurs when the process variable ex-
ceeds the alarm setpoint.
• LOW ALARM
Low process variable alarm. Occurs when the process variable goes
below the alarm setpoint.
• HIGH/LOW
Combination of high and low alarms. Occurs when the PV exceeds
the individually set high or low setpoint.
• BAND
Creates a band centered around the control setpoint, that is twice
the alarm setpoint. Alarm occurs when the process variable travels
outside of this band. The alarm is dependent on the control setpoint.
As the control setpoint changes, the band adjusts accordingly.
For example, if the control setpoint is 500 and the alarm setpoint is
25, then the band extends from 475 to 525.
• DEVIATION
Similar to the band alarm but creates a band only on one side of the
control setpoint. Alarm occurs when the process variable deviates
from the control setpoint by an amount greater than the alarm
setpoint. This alarm is dependent on the control setpoint; as the
control setpoint changes, the alarm point changes.
For example, if the control setpoint is 500 and the alarm setpoint is
+50, then an alarm occurs when the process variable exceeds 550.
In order for an alarm to occur when the process variable drops be-
low 450, select an alarm setpoint of –50.