Page 1
Fisher Controls
DPRSOO Integral Controller
User Manual
This Manual Supports Software Version 8836 thru 9147
User Manual
UM61:DPR900:9147
May 1991
Change I- September 1991
Change 2 - July 1992
Page 2
0 Fisher Cmtmls International. Inc. 1991, 1992. All rights resewed.
Printed in the U.S.A.
Page 3
DPRSOO Integral Controller User Manual
Contents
Section/Title
1
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.1 Scope . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.2 Description of Manual
.
1.3 Controller Description
2 Installation . . . . . . . . . . . . . . . . . . . . . . . . _ . . . . . . _
2.1 Mechanical Installation
2.2 Wiring the Mounting Cassette.
2.3 Power and Ground Wiring .
2.4 Signal Wiring . .
2.5 Jumper Module
2.6 Low-Level Temperature Input Module
2.7 Analog Input Signals
2.8 Analog Output Signals . . . . . .
2.9 Digital Input Signals . , . . . . . . . .
2.10 Digital Output Signals
2.11 Ground Loops and Common Mode Voltage
2.12 Installing the Mounting Cassette
2.13 Installing the Controller , , , . . , , , , , , . ,
2.14 Removing the Controller . . . .
3 Controls and Indicators.. . . . . . . .
........
3.1 Controller Front Panel
........
3.2 Digital Display . .
........
3.2.1 Process Value . .
........
3.2.2 Setpoint . .
........
3.2.3 Alarms . _.
........
3.2.4 Fault Codes . _.
........
3.2.5 Analog Inputs
........
3.2.6 Display Priorities
........
3.3 Bargraph Displays .
........
3.3.1 Process Values . . . .
........
3.3.2 Setpoint . _.
........
3.3.3 Output Signal
........
3.4 Operating Mode
........
3.4.1 Operation/Programming
........
3.4.2 Auto/Manual . . . .
........
Page
..... ...
l-l
........ l-l
....... l-l
........ l-l
......... 2-1
......... 2-l
......... 2-2
......... 2-2
.........
......... 222
.........
2-8
.........
2-9
........
2-l 0
........
2-l 0
........ 2-11
........ 2-11
........
2-l 3
........
2-l 4
........ 2-l 5
,..... . . .
3-l
.
. . .
. .
z
3-3
3-3
-. 3-3
2:
.
z
3-5
E
.
. . .
z
.
3-6
Change 2 -July 1992
lJM61;DPR900:9147
. . .
111
Page 4
Section/Title
Page
3.4.3 Computer/Local Control
.....................
3.4.4 Remote/Local Setpoint
......................
3.4.5 Normal Operating Modes ....................
3.5 Manual Control of Output Signal
................
3.6 Establishing a Setpoint
........................
3.6.1 Local Setpoint (LSP)
........................
3.62 Remote SetpointIExtra Internal Setpoint
/Computer Setpoint .....................
3.6.3 Switching Between Remote and Local Setpoints
3.7 Changing Configured Values: Ratio, Bias and
Extra Internal Setpoint ..................
3.8 Computer Control ............................
3.9 Autotuner Operation ..........................
3.10 Alarm Indications ............................
3.11 Error indications .............................
3.12 Bumpless Transfer ..........................
4 Function Codes .................................
4.1 Selecting and Changing Function Codes ........
4.2 Setting Principle ..............................
4.2.1 Tuning Parameter/Configuration Changes .....
4.2.2 Function Selection ..........................
3-7
3-7
3-7
3-7
z
: ,327;
3-10
3-11
3-11
3-12
3-13
3-14
......
4-l
...... 4-l
...... 4-l
...... 4-2
...... 4-4
5 Configuration ......................................
5.1 General ........................................
5.2 Definition of the Control Problem
..................
5.3 Selection of Inputs and Outputs
...................
5.4 Input Signal Assignment ..........................
5.4.1 Analog inputs (Al) .............................
54.1 .I Current or Voltage Inputs
......................
5.4.1.2 Fixed or Floating References (Return Lines)
.....
5.4.1.3 Low-Pass Filter ..............................
5.4.1.4 Measuring Range ............................
5.4.1.5 Signal Range Selection
.......................
5.4.2 Analog Inputs Using the DPRlOO Series
Temperature Input Module .................
5.4.3 Discrete Inputs (DI)
............................
5.4.4 External Discrete Signal Switching (A/M and R/L)
and Signal Tracking .......................
5.5 Output Signal Assignments .......................
5.5.1 Analog Output (AO) ............................
5.5.1 .l Analog Output (Option 1) ......................
5.5.1.2 Positioning Motor Output (Option 2) ............
5.5.1.3 Pulse Width Modulated Output (Option 3) .......
5.5.2 Discrete Outputs ...............................
5.6 Process Value (PV) Handling .....................
5.6.1 Filtering Analog Inputs ..........................
5.6.2 Process Value Calculation
......................
5.6.3 Process Value Monitoring and Alarms ............
. . 5-I
5-l
5-l
.
. z:
5-3
5-3
. 5-3
. .
5-3
5-4
5-4
. z2
5-8
, 5-l 0
. 5-l 0
5-l 0
5-l 2
5-l 4
5-l 4
5-l 5
5-l 5
. 5-l 5
. . 5-l 7
Change 2 - Jufy 1992
UM6.1:DPR900:9147
Page 5
(FISHER)
Contents
Section/Title
Page
5.6.3.1 Process Value Monitoring
...........
5.6.3.2 Process Value Alarms ..............
5.6.3.3 Deviation Alarm Limits ..............
5.6.3.4 Min/Max Analog Input Selector.
......
5.6.4 Signal Selector - Analog Output 2 (A02)
5.7 Setpoint Handling .....................
57.1 Local Setpoint (LSP) .................
5.7.2 Extra Internal Setpoint (ESP) ..........
57.3 Remote Setpoint (RSP) ...............
5.7.4 Computer-Generated Setpoint (CSP)
5.7.5 Remote/Local Setpoint Switching ......
5.7.6 Setpoint Tracking ....................
5.7.7 Setpoint Limits ......................
5.78 Setpoint Ramp and Hold ..............
5.7.9 Min/Max RSP Selection ..............
5.8 Analog Output Signal Handling
..........
5.81 Manual Output Signal Control (AOl) ...
5.8.2 Output Signal Limiting (AOl)
..........
5.8.3 Forced Output Control (AOl)
..........
5.8.4 Feedforward Control (AOl)
...........
5.8.5 Output Signal Tracking ...............
58.51 Tracking Signal Selector (Option 3) . I .
5.8.5.2 Tracking Signal Selector (Option 4)
...
5.8.6 Output MinlMax Signal Selector (AOl)
5.8.6.1 Output Signal Display ...............
5.8.7 External Setpoint Output (A02) ........
5.8.8 Start-Up and Fatal Fault Values .......
5.9 Computer Control .....................
5.9.1 Remote Output Signal Control (DDC)
...
5.9.2 Remote Setpoint Control (SPC) ........
59.3 COMLI .............................
5.10 Autotuner ...........................
5.10.1 Principal of Operation ...............
5.10.2 Initiating the Autotuner Function
......
5.10.3 Autotuner Operation ................
5.11 Gain Scheduling .....................
5.11.1 Principle of Operation ...............
5.11.2 Selecting Gain Scheduling
...........
5.11.3 Modifying Gain Scheduling Dynamics
5.12 Manual PID Parameter Setting .........
5.13 Direct or Reversed Controller Action ....
5.14 Alarm and Fault Indications
............
5.14.1 Fault indication .....................
5.14.2 Power Failure ......................
5.15 Authorization Check ..................
5.16 Resetting the Controller ...............
5.17 Software Version Number .............
5.18 Configuration Planning Worksheets
.....
5-17
5-19
5-21
5-22
5-22
5-23
5-24
5-25
5-27
5-29
5-30
5-31
5-32
5-33
5-35
5-35
5-36
5-36
5-36
5-37
i&g
5-38B
5-38B
5-39
5-39
5-41
5-41
5-42
5-42
.5-43
. 5544
.5-44
5-45
5-46
. 5-48
5-49
5-50
, 5-51
5-52
5-53
5-55
. 5-55
5-56
5-56
5-57
5-57
5-58
Change 2 -July 1992
UM6.7:DPR900:9147
Y
Page 6
Section/Title
Page
Appendixes
Appendix A Fault Codes ................................. A-l
Appendix B FCODE Index ................................
B-i
Appendix C Field Replaceable Park ....................... C-i
vi
Change 2 -July 1992
UhKl:DPR900:9147
Page 7
Page A
List of Effective Pages
All Pages Original
Change
Change
Title Page
Table of Contents
Section 1
l-l thru 1-3
l-4
l-5
l-6
l-7 thru l-8
Section 2
2-1 thru 2-3
2-4
2-5
2-6 thru 2-9
2-10
2-11 thru 2-16
Section 3
3-1 thru 3-l 3
3-14 .
Section 4
4-1 thru 44
Section 5
5-1 .
5-2
5-3 thru 5-7
5-8 thru 59
5-10 thru 5-l 2
5-13 thru 5-14
5-l 5 thru 5-I 6
5-17
5-18
5-l 9 thru 5-21
5-22 ._.__....
5-23 thru 5-24
5-25 thru 5-26
5-27 thru 5-31
5-32 ._.__,
5-33
O.....May1991
1 September 1991
2,....July1992
2
2
0
2
0
1
0
0
1
0
Section 5 (continued)
5-34 .............. 2
5-35 thru 5-37 0
5-38 thru 5-388 ... 1
5-39.. ............ 2
5-40 .............. 1
541 thru 5-56 0
5-57 thru 5-58 2
5-59 .............. 0
5-60 thru 5-63 ..... 2
5-64 .............. 0
Appendix A
A-l .............. 0
A-2 thru A-3 ...... 2
A4 thru A-6
......
0
Appendix B
B-i ............... 1
B-2 ............... 0
Appendix C
C-l .............. 1
c-2 ............. .o
Change 2 - Jdy 1992 uM6.1:DPR900:9147
Page 8
Page E/Blank
Change 2 -July 1992
Page 9
IFISHER’)
Fisher Controls
DPR900 Integral Controller
User Manual
This Manual Supports Software Version 8836 thru 9125
User Manual
UM6.1:DPR900:9102
May 1991
Change 1 - September 1991
Page 10
The following information and attachments constitute Change 1 to the DPRSOO Integral
Controller User Manual, UM6.1 :DPR900:9102. Vertical change bars are used to highlight
the material affected by this change.
How to Insert This Change
1. Remove title page and insert Change 1 title page.
2. Insert Page A/B, List of Effective Pages at the end of the table of contents
3. Remove page 1-3 thru l-6 and insert changed pages l-3 thru 1-6
4. Remove page 2-3 thru 2-6 and insert changed pages 2-3 thru 26.
5. Remove page 2-g/2-10 and insert changed page 2-912-10. Reason for change was to
clarify connection of analog output signals.
6. Remove page 3-13/3-14 and insert changed page 3-13/3-14. Reason for change was
to remove unnecessary text.
7. Remove page 5-i/5-2 and insert changed page 5-115-2. Reason for change was to
add information in table.
8. Remove page 5-7 thru 5-l 0 and insert changed page 5-7 thru 5-l 0. Reason for
change was to add clarifying text and change table.
9. Remove page 5-13/5-14 and insert changed page 5-13/S14. Reason for change was
to correct options and change A05 to DO5 in figure.
10. Remove page 5-25/5-26 and insert changed page 5-25/5-26. Reason for change was
to add information in table.
11, Remove page 5-31/5-32 and insert changed page 5-31/5-32. Reason for change was
to add information in table.
12. Remove page 5-37/540 and insert changed page 5-37/540. Reason for change was
to add information to table and expand text.
13. Remove page 5-57 thru 5-64 and insert changed page 5-57 thru 5-64. Reason for
change was to add table on 5-58 and correct table information as highlighted.
14. Remove Appendix B and insert changed Appendix B. Reason for change was to add
FCODE’s to index.
15. Remove Appendix C and insert changed Appendix C. Reason for change was to correct
part number and add new part.
16. Remove end page and insert new end page. Reason for change was to correct
informational block.
17. Place this instruction page behind Change 1 Page A, as a record of Change 1 insertion.
Page 11
Fisher Controls
Change 2 Instructions for . . .
UM6.1 :DPR900:9102
DPRSOO Integral Controller
User Manual
(Original -
May 1991)
(Change 1 - September 1991)
The following information and attachments constitute Change 2 to the
DPRSOO Integral Controller User Manual, UM6.1:DPR900:9102. Vertical
change bars are used to highlight the material affected by this change.
How to Insert This Change
1. Remove title page and insert Change 2 title page.
2. Remove the Table of Contents and replace it with the new TOC
3. Insert Page A/B, List of Effective Pages at the end of the table of
contents.
4. Remove page l-3/14 and insert changed page l-3/1-4
Page 14 has an addition to the digital output signals for ac power.
5. Remove page 2-3/24 and insert changed page 2-3/24.
On page 24 the power connections for an ac-powered DPR910 are
relocated.
6. Remove pages 2-11 thru 2-16 and insert changed pages 2-11 thru
2-l 6.
A note regarding power usage has been added to page 2-11. The
38V value is added to the drawing on page 2-12. Subsection 2.13 on
page 2-14 is upgraded.
7. Remove pages 5-l 7 thru 5-22 and insert changed pages 5-l 7 thru
5-22.
On page 5-17, a notation has been added to the end of subsection
5.6.3.1 regarding DO3 and D04. On page 5-19, a sentence has been
added at the end of the page. On page 5-20, a footnote has been
added to the FCODE 103 options and the next to last paragraph has
been changed. A sentence has been added near the top of page
5-21.
Change 2 -July 1992
UMfi.l:DPR900:9147
Page 12
6. Remove page 5-3315-34 and insert changed page 5-3315-34
The drawing on page 5-34 has had the DO3 deactivated text added.
9. Remove page 5-39/540 and insert changed page 5-39/540
On page 5-39, a note is added regarding reversing the output signal
display.
10. Remove pages 5-57 thru 5-64 and insert changed pages 5-57 thru
5-64.
Page 5-57 has a change to the version number in subsection 5.17.
Page 5-56 also has a version number change. Page 5-60 in
Worksheet 5-2, the Calculation of Process Variable function has been
changed to show All as the first variable in the last two formulas. On
page 5-63, changes are made to FCODE 135 and 136.
11. Remove Appendix A page A-l /A4 and insert changed Appendix A
page A-llA4.
Fault code El 10 is added on page A-3.
12. Place this instruction page behind Page B, Change 2 List of Effective
Pages, as a record of Change 2 insertion.
UM6.1:DPR900:9147
Change 2 - Jdy 1992
Page 13
l-l
1
1.1
1.2
1.3 Controller Description
May 1997
UM6.1:DPFt900’9102
Introduction
Scope
This manual provides information required for installation, operation,
and configuration of the DPRSOO Integral Controller.
Description of Manual
Section 1 = Introduces the user to the organization of the manual,
contents of other sections, and DPRSOO Controller specifications.
Section 2 = Describes the mechanical and electrical installation
procedures for the controller, including power and grounding
requirements.
Section 3 = Explains the functions and use of the front panel controls
and indicators.
Section 4 = A brief description of the procedures used to set
FCODE’s.
Section 5 = Instructions for configuring the DPRSOO Controller.
Appendix A = Fault Codes
Appendix B = FCODE Index
Appendix C = Field Replaceable Pans
The DPRSOO Integral Controller is a single-loop, proportional, integral,
derivative (PID), user-configurable controller. All controller functions
reside in the controller. Configuration consists of selecting the
appropriate functions and setting the tuning parameters, using the
controls and indicators on the front panel. Configuration may be
entered or changed while the controller is operating. The controller
scans and updates all input and output signals five times a second.
When the controller is communicating with a computer via the RS-485
serial interface, this I/O scan and update rate is not valid, due to
communications link limitations. Connection to and communication
with external equipment is via four analog and four digital inputs, two
analog and six digital outputs, and a serial data port (RS-485).
Page 14
l-2
Introduction
The controller may communicate with a central computer system via
the RS-485 serial data communication channel. The communications
mode is half-duplex, using the COMLI communications protocol.
Two discrete inputs may be used to directly control either the output
signal or setpoint value. Other discrete inputs can switch the controller
to a remote or extra internal setpoint or a predetermined value. These
external discrete signals may also switch the controller between
different modes: Auto/Manual or Local/Remote.
The terminal block, which connects all input power and signal lines, is
at the back of a separate, permanently installed mounting cassette.
The controller slides into this cassette, eliminating the need to
disconnect cables or disturb the electrical installation when changing
a controller.
A configuration reference card is located in the slot behind the hinged
flap at the top of the controller’s front panel. It lists the controller
functions and tuning parameters. Space is provided for the user to
indicate the configuration and tuning values currently entered in the
controller.
DPRSOO Specifications
CONTROL FUNCTIONS
PID function as standard
Manual or autotuner PID parameter setting
Gain scheduling via as many as three different
parameter settings
Feedforward function selection
CONTROL RANGE
Amplification (Gain) between 0.01 and 99.99
Integral time (Reset) between 0.1 and 9999 seconds or
disabled (OFF )
Derivative time (Rate) between 0 and 9999 seconds
Direct or reversed control action
Full alarm and fault indications.
CONTROLLER FUNCTIONS
Process Value
Linearization, filtering, and direct temperature inputs for
a Pt-100 RTD or Type J, K, R or S thermocouple
User-configurable input signal range
Process variable calculation function
May 1991
Page 15
[FiGiF)
introduction
l-3
Process variable monitoring function
Selectable analog and/or digital display
MinlMax process variable signal selector
Setpoint
Internal, extra internal, external, or computer set
Setpoint limits digitally set
Setpoint ramp and hold function
Remote setpoint with ratio and bias functions
Setpoint tracking function
Setpoint calculation function
Analog and/or digital indication
Min/Max setpoint signal selector
Output Signal
Selected output types:
n
Analog
Alarms
m Pulse-width modulated
. Positioning motor control
Output signal range limited, computer-controlled, or
controlled with digital input signals
Selectable start-up and default values
Can be forced to hold at a pre-set value
Reversible analog indication
Output signal detection (malfunction)
Min/Max output signal selector
Process value or deviation alarms
Loss of input signal alarm
Process value monitoring alarms
Loss-of-output signal alarms
May 7991
Page 16
1-4
Introduction
Automatic self-testing alarms
Incorrect configuration alarms
Miscellaneous
External output of selected input signal
Input signal filtering and linearization
External Auto/Manual and Remote/Local switching
Selectable digital signal logic
Digital output indication of mode, alarms, and panel
signals
On-line entry and alteration of configurable functions
INPUT SIGNALS
Analog
Four floating analog inputs, allowing signals between
-5 volts and +19 volts relative to supply ground. +5
volts signal added to input voltage giving 19 + 5 = 24
volts, which can vary by f 10%
Digital
Signal range: 4-20 mA (I-5V) or O-20 mA (0-W)
Four optically-isolated digital inputs for 24 Vdc.
Logical 0: interpreted as O-5 volts
Logical 1: interpreted as 1630 volts
Input Resistance
Current inputs: 250 ohms
Voltage inputs: greater than 500K ohms
OUTPUT SIGNALS
Two analog 4-20 mA or O-20 mA
Load 0 to 650 ohms
Load dependency less than 0.2% with a change from 0
to 650 ohms
Digital
Four digital outputs of 24V, up to 250 mA each
(D03-D06, with external 24V power only).
AC-powered, maximum of 100 mA total for all outputs.
lJM6.1:DPR900:9147
Change 2 -July 1992
Page 17
Introduction 7-5
Two optically-isolated digital outputs for 24V/20 mA
(1301,002)
Output Signal Failure
Output signal line failure alarm
Power Failure Restart
Restart from preselected value or last values
PROCESS INDICATORS
ProcesslSetpoint Values
Analog indication on vertical bargraph displays with
2.5% resolution (O-100% scale)
Digital indication on five-character display in
engineering units. Process variable is default display
Output Signal
Analog indication on vertical bargraph display with 5%
accuracy, graduated O-100%. During manual control,
resolution is 0.5%
Can be used with positioning motor output control to
indicate actuator positioning
Alarm and Fault Indicators
Shown on five-character display and two digital
outputs.
Miscellaneous
Computer control indicated by C in display
Setpoint indicated by SP shown on display
During configuration, function codes and tuning
parameter values appear on display
Functions chosen are indicated by LED’s illuminated
on pushbuttons
ACCURACY
Maximum error less than 0.2% of measuring range.
Thermocouple
Less than 0.01% of thermocouple measuring range per
OC within the range of 0-50°C ambient. Accuracy is
lo-20°F (5-1 O°C) for Type R and S thermocouples.
May
7991
UM6.1:DPFt900:9102
Page 18
l-6
Introduction
3OF (1.5OC) for 100 ohm Platinum RTD
Scan Rate
All inputs and outputs scanned and updated five times
per second (200 ms)
POWER REQUIREMENTS
AC Power
11 O/120 or 220/240 Vat, + 10% at 50/60 Hz. Power
consumption lOVA,I7VA maximum.
DC Power
24 Vdc + IO%, 7.2W maximum, excluding I/O circuits
External Load
24 Vdc + IO%, 100 mA total with ac supply.
Three-stage pulse output supplies up to 20 mA to
potentiometer (750 ohms).
ENVIRONMENTAL REQUIREMENTS
Temperature
32 to 122OF (0 to 50°C) in operation.
Installation
Flush fitting in mounting cassette, installed with
retaining springs from the front panel.
Environmental Classification
In accordance with IEC 529, IP20 in all directions
(meets or exceeds NEMA 12), IP65 from the front
when mounted in a sealed panel
Electrical Connections
Screw terminals will accommodate up to 14 AWG
(1.5mm2) wire. All connections located in terminal
blocks on the rear of the mounting cassette.
Computer Communications
Standard RS-485 serial interface (COMLI protocol)
UM67:DPR900:9102
Change I- Se@mber 7991
Page 19
Introduction
l-7
Electrical Safety
SEN 436 15 03
CSA certified (non-hazardous locations)
Static Discharge
SEN 436 15 22 (15k volts).
DIMENSIONS
Width: 2.84 inches (72 mm)
Height: 5.67 inches (144 mm)
Length: 10.83 inches (275 mm)
WEIGHT
5.5 pounds (2.5 kg)
May 1991
UM6.1 :DPR900:9702
Page 20
1-8
introduction
[FISHER)
This page blank.
UM6.1:DPR900:9102
May 1991
Page 21
2
2.1
Installation
Mechanical Installation
The DPRSOO Integral Controller units fit into a cutout in a vertical
panel, allowing for high packing density. The cutout may be for a
single controller unit or for multiple units mounted side by side. For
typical installations the panel must be between 0.06 inch (2 mm) and
0.16 inch (4 mm) thick. For installation information on thicker panels,
contact your Fisher Representative.
The figure shows a controller’s external dimensions, along with the
spacing and dimensions for panel cutouts. Front panel cutouts
conform to DIN standards.
4b
Caution
The panel must be able to support the
weight of all controllers mounted in it. A
large number of controllers in a panel may
require additional panel support.
ic
I I I
DPRSOO Mounting Cassette Dimensions
May 1991
lJM6.1:DPR900:9102
Page 22
2.2
Controllers cannot be installed vertically in the
same cutout. Cutouts should not be closer than
shown above.
Make the cutouts in the panel according to the dimensions and
spacing shown. For multiple installations, make the cutout wider
according to the following formula:
Cutout width (W) = N x B - 0.19 inch (4.5 mm)
where:
N = number of controllers to be mounted
B = unit width = 2.84 inches (72 mm)
Tolerance = + 0.04 inch (1 mm) per unit
Wiring the Mounting Cassette
The DPRSOO Integral Controller fits into a standard panel-mount
cassette. The mounting cassette has terminal blocks on the rear for
all electrical connections.
Connect all wiring to the terminal blocks before inserting the cassette
into the panel cutout unless the rear of the cassette will be accessible
after installation.
2.3
Power and Ground Wiring
The power source for the DPRSOO Controller should be free of
electrical noise. Do not use sources that supply power to relays,
contacts, or thyristor-controlled equipment. If no other source is
available, use an isolation transformer or magnetic voltage stabilizer.
Do not connect electrically noisy equipment and the DPRSOO to the
same secondary of such a transformer. Closely follow the
manufacturer’s recommendations concerning the grounding 01 the
isolation transformer.
When operating the controller from an alternating current source,
always use a 3-wire power cord. Connect the neutral wire to terminal
41 and the ground wire to terminal 42 on the terminal block. Connect
the supply line wire to the appropriate terminal for the power being
The controller operates on either 50 or
lJM6.1:DPR900:9102
May 1991
Page 23
hstaliation 2-3
For proper operation of DPR products, it is essential that ground
wiring be installed as indicated. To reduce electrical noise and
interference and increase safety, connect separate ground wires from
each unit to the Local Ground Bus (LGB) in the cabinet or enclosure.
The ground wire from the LGB to the plant ground should be run in
plastic or other non-ferrous material conduit. Ground connection of
the same type, i.e. dc common connections, may be to the same point
on the LGB. Never intermix dissimilar grounds.
Terminal 36, the dc common and Terminal 42, the case ground,
should always be connected to the LGB. The remaining connections
are dependent on type of input power (AC or DC).
If 14 or 16 AWG wire is used to supply AC power, the incoming
ground wire should terminate at the LGB. A second wire should be
run from the termination point on the LGB to Terminal 42. If a smaller
wire size is used, connect the incoming ground wire to Terminal 42.
Then run a second wire from Terminal 42 to the LGB.
When considering the incoming wire size, ensure that any line loss
does not exceed the voltage tolerance of the DPR unit. A power
conditioner may be required.
If the unit is mounted in a metal panel or enclosure, the panel,or
enclosure must be grounded to the DPR. Use the terminals lugs at
the rear of the mounting cassette for this purpose.
- Input/Output Signal
Wiring Terminals
I
DPR9cunm2
Terminal Block Connections Diagram
- Terminal Lugs
- Temperature
Module Socket
- Jumpers (for selecting
analog input type)
H input/Output Signal
Wiring Terminals
May 1991 UM6.1:DPR900:9102
Page 24
-
[FISH-i
DPRSOO
DPRSIO
8=&s
I
To 24 V
SUPPlY
b24V
iUPPfY
-
024V
;uPPlY
A7
DPR810
m
11
+
+
+
+
1”
+
DPRSOO
DPRSI 0
m
Single Unit, AC Powered
lJM6.1:DPR900:9147
Change 2 -July 1992
Page 25
‘0 24 v
iUPPfY
-
DPRSOO
r024v
j,pply
DPRSIO
LGB
I
I I I
___.
11 L.LlI, J
1
N
G
. . . . .
CA
h
24 V Return
Multi Unit, DC Powered
DPRSOO
DPRSI 0
Multi Unit, AC Powered
I
To24V
SUPPlY
Change 1 -September 1991
UM6.1:DPR900:9102
Page 26
2.4
oundmg
The 24 Vdc terminal can supply a maximum
external load of 100 mA when powered from 110,
120,220 or 240 Vat power sources. This supply is
intended to power transmitters or relays connected
to the discrete outputs. The 100 mA limit applies
only to ac powered units. No internal load,
including the two analog outputs, need be included
in the 100 mA total.
Controllers powered from 24 Vdc sources have a
current limit of 250 mA on each output.
To operate the controller from a 24 Vdc supply, connect the power
supply leads to 24 V terminals 35 and 36 (observe the proper
polarity).
Signal Wiring
Connect all input and output wiring to the terminal blocks at the rear
of the mounting cassette. Use direct runs of individually shielded,
twisted-pair wire in an insulating jacket. The maximum wire size for
terminal connectors is 14 AWG (1 .5mm2). The insulating jacket
should only be stripped to allow the length of wire required to connect the twisted-pair to the terminals.
For long runs, it may be practical to route field wiring to a junction
box, then through multi-pair shielded cable. Lace wires as required
by local electrical codes or plant standards. Connect the shield and
drain wires to the grounding bus bar as shown. Standard practice is
for shields to be grounded at the signal source only. If the shield is
grounded at the DPR (vs the external instrument), also tie it to the
LGB. Shield wires should not be stripped further than one inch from
the end of the signal wires.
Route a 14 AWG (1.5 mm*) conductor from the mounting cassette
ground to the panel ground point. Then use an AWG 8 (8.37 mm2)
multistrand conductor or 0.50 inch (12.7 mm2) braided ground
conductor (preferred) to connect the panel ground point to the LGB.
The panel ground point and the ground of the ac power source for the
unit should be connected to the same grounding bus bar. This
minimizes the possibility of significant voltage between ground points.
Use crimped or thermal-welded connections at all ground points.
UM6.1:DPR900:9102 May 1991
Page 27
2.5
Route a 14 AWG (1.5 mm*) conductor from terminal 36 to the
instrumentation system dc ground point. Then run a 10 AWG (5.26
mm*) multistrand conductor from the instrumentation system dc
ground point to the existing plant ground grid. This point on the plant
ground grid must be dedicated exclusively to the instrumentation
system dc ground and must not be used for other equipment
grounding. Use crimped or thermal-welded connections at all ground
points.
Jumper Module
@
Caution
Ensure that power to the controller is OFF,
prior to cutting jumpers. Leave sufficient
metal to solder jumper back together if
required.
The jumpers on the back of the mounting cassette determine the
electrical termination characteristics of the four analog inputs and the
RS-485 communications wiring. All of the analog inputs, All thru Al4,
have 250 ohm input resistors. There is also a 100 ohm termination
resistor on the RS-485 connection. The figure shows the jumper
module and the table describes the connection each jumper makes.
input resistor Al2
Input resistor
A14
Floating ground All
Floating ground Al2
Floating ground Al3
Floating ground Al4
Current In
Current In
current In
Current In
Fixed GND
Fixed GND
Fixed GND
Fixed GND
YES
Voltage In
Voltage In
Voltage In
Voltage In
Floating GND
Floaring GND
Floating GND
Floating GND
NO
Jumpers 1 thru 4 connect the 250 ohm input resistors in series so
that the 4-20 mA input signal can be converted to a I -5V signal inter-
nally. Cut the appropriate jumper to accept a direct l-5V signal on
1...5...!3
the input terminals. Jumpers 5 thru 8 connect inputs All thru Al4 to
DPR90c-5%
the controller supply ground. Cut the appropriate jumper to allow the
negative input terminal to float between -5 V and 17 V, with respect
to supply ground.
May 1991 UM61:DPR900:9102
Page 28
Jumper 9 is used to terminate the last controller on the RS-485
communication link. When the link is used, this jumper must be cut on
all but the last controller on the link. Otherwise, it should remain intact.
2.6
Low-Level Temperature Input
A DPRlOO Series Temperature Input Module may be plugged into the
controller to allow direct connection of a low-level input signal. The
controller internally connects this input to All. This disables All for
other uses. For further information on the DPRlOO, refer to Fisher
Controls Bulletin 6.1 :DPRlOO. The figure illustrates the wiring of the
temperature input module.
Signal Ground
Notes:
D When a temperature input nwdule is connected to All,
jumper 1 must be cut, and Jumper 5 must be intact. A
floating ground (zero) is n
md. DPR90M06
FCODE 119
must
be set to Option 2 (O-20 mA,
O-5 V) if a DPRlOO Series Temperature Input
Module is used.
UM6.l:DPR900:9102
May 1991
Page 29
2.7
Notes:
D Chassis ground
D For voltage inputs the resistance
jumper must be cut.
Analog Input Signals
Connect analog inputs All thru Al4 to the appropriate terminals on
the back of the mounting cassette. Some examples of connections
are shown in the figure. Select the Al signal ranges (O-20 mN4-20
mA or O-5 V/l -5 V) during configuration as explained in Section 5.
Ensure that shields are connected to chassis ground by using either
of the two lugs at the upper edge of the rear panel.
If a Pt-100 sensor or thermocouple is used without a transmitter, it
must be connected directly to a DPRIOO Temperature Input Module
mounted on the module block. This disables the use of All for any
other signal.
D For voltage Inputs the
resistance jumper
must be cut.
The DPRSOO accepts signals from field-powered transmitters and
can supply the required 24 Vdc to most remotely-powered
transmitters. The figures show how to connect external sensors
powered either by the controller or by an external source. The
terminal block connector numbers for All are shown, although the
connection information applies to all analog inputs.
May 1991 UM6.1:DPR900:9102
Page 30
I
I
Analog Output Signals
Two analog outputs are available on the DPRSOO and
both deliver a 4-20 mA/O-20 mA signal proportional to
the 6100% selected output signal. The controller PID
output signal is always available at AOI. A02 is a re-
transmission of a user selected internal signal value.
Connect the analog output signal wires to terminals 9 and
10. Configure the output signal range using FCODE 116.
LmwW7-3
2.9
If an actuator position feedback potentiometer for a positioning
motor output is required as shown in the figure. The potentiometer
is connected to A01 where the current input will be supplied.
The negative input of any Al must be jumpered to
supply ground when the potentiometer setup is
used.
Digital Input Signals
All digital input signals (Dll thru D14) to the controller are isolated
by opto-couplers. The input current source may be from the
controller or from an external power supply as shown.
lJM6.1:DPR900:9102
Change 1 -September 1991
Page 31
Digital Output Signals
Digital output signals DO1 and DO2 indicate the controller mode
(auto/manual and remote/local) to an external destination. These two
outputs are optically isolated. The figure shows an example of the
connection for an external load with an external supply.
If an inductive load such as a relay coil, is
connected to a digital output, the coil must be
shunted by a diode (lN4003 or similar). Observe
proper polarity and wire the diode as close as
possible to the coil.
Controllers powered from 24 Vdc sources have a
current limit of 250 mA on each output.
Change 2 - Ju/y 1992
uM6.1:DPFl900:9747
Digital output signals (DO3 thru D06) are open-collector transistor
outputs as shown in the figure. The 24 V is directly connected to
these outputs. However, each output can have its own separate
supply.
The 24 Vdc terminals can supply a maximum
external load of 100 mA when powered from 110,
120,220 or 240 Vat power sources. This supply is
intended to power transmitters or relays
connected to the discrete outputs. The 100 mA
limit applies only to ac powered units. No internal
load, including the two analog outputs, need be
included in the 100 mA total.
Page 32
2-72 rnsfa//afion
2.11
Ground Loops and Common Mode
Voltage
Ground loops occur when either the return wire or the sensor is
grounded at the process line and Jumper 5 on the mounting cassette
is intact. To correct this situation, the input should be connected as a
differential input (Jumper 5 cut). The input then floats with respect to
supply ground. The maximum common mode voltage (CMV) the
controller should receive when wired in this manner is -5 to +I7 volts
taken from the input negative pole to supply ground. If these limits are
expected to be exceeded, an isolation amplifier must be used.
For each of the points 1 thru 4 in the following
example, the table lists the maximum potentials
and grounding possibilities.
4 - 20mA
SeWDr
I
CMV referred
to this point
UM6.1:DPF?900:9147
Change 2 -July 1992
Page 33
2.12
1
sensor
PT I Potential
t
f Groundino Ponnihilitv
1 -1ov
Not permitted, Max CMV is -5 V
2 -5 v Permitted
3
ov Permitted
4
+38
V
Not permitted, Max CMV is +24 V
The figure depicts a current loop example for a DPRSOO controller.
In this example, it is assumed that all units are isolated from the
main power supply ground. This type of current loop must always be
grounded at a single point so that a floating ground does not occur
and introduce a large interference potential.
Installing the Mounting Cassette
To fit the mounting cassette into the panel cutout:
q
Position the mounting cassette (without the controller inserted)
in the panel cutout as shown.
q
Position the lower retaining spring as shown. Hold the
mounting cassette in place with the thumb and use the index
finger to press the spring down.
o Insert the upper retaining spring, as shown on the next page,
to complete the installation.
Change 2 -July 1992 uM6.1:DPR900:9147
Page 34
Retaining Spring
(1 Top and 1 Bottom)
2.13
in installations utilizing thicker panels, the retaining
springs may not fit properly and can prevent
insertion of the cassette Contact your Fisher
Representative for assistance.
When it is necessary to remove the mounting cassette, reverse the
procedure. by first removing the upper retaining spring, then the lower
one. Press the front edge of each spring back to remove it. In the
case of a thick front panel, it may be necessary to use a screwdriver
or other tool to apply enough pressure to remove the spring.
Installing the Controller
When the mounting cassette is firmly secured in the panel, install the
controller by sliding it into the mounting cassette and pressing the
unit firmly into place. When the mounting cassette is connected to its
power source, and the DPRSOO is fully seated in the mounting
cassette, the front panel illuminates, The digital display will show the
year and week (YYWW) of the controller firmware version. This
display lasts 3 seconds before the controller begins operating to
allow any transmitters connected to the controller to stabilize. The
controller is now ready for use with the default configuration settings.
This manual supports software version numbers 8836 thru 9147.
The functionality is limited to the software version currently loaded
on the user’s DPRSOO Integral Controller.
UM6.1:DPR900:9147 Change 2 -July 1992
Page 35
Removing the Controller
To remove the controller:
q
Raise the hinged cover and remove the configuration
reference card.
q
With a small screwdriver, push the sliding, red locking plate
toward the back of the controller (the locking plate travels
about 1.5 inches (38 mm) before releasing).
q
Pull the controller out of the mounting cassette.
The hinged cover has two grooves that can accept a paper loop
identification label. The configuration reference card is kept in the
space directly behind this cover.
Screwdriver
Travels about
Change 2 -July 1992
UM6.ltDPR900:9147
Page 36
This page blank.
lJMfi.l:DPR900:9147
Change 2 - July 1992
Page 37
Controls and lndkators
3-1
3.1
Controls and Indicators
This section describes the DPRSOO Integral Controller front panel
controls and indicators, and gives general instructions for using them.
Controller Front Panel
The illustration shows the front panel controls and indicators, followed
by a description of each.
DPRSOO Front Panel Controls
.4
5
6
7
a
9
10
11
1 - Digital Display-Shows process value and any alarm
indications on five-character display. Can also display
the SP value, configuration value, error code or
selected analog input signal value.
2 -Tag - Paper label to identify controller.
3 - Engineering units display label.
4 - R Button - For switching between remote or extra
internal setpoint value, computer or local control. The
LED lights when the controller is in the remote
mode.The button also functions as a STORE button
during configuration. The STORE light (6) below this
button lights when this alternate mode is active.
5 - M Button -Switching button for selecting Auto or
Manual control. The LED lights when the controller is in
the Manual mode. This button is also used to manually
stop the Autotuner function.
6 -STORE Light - When this Red light is On, the
alternate mode (STORE) of the R button (4) is active.
When the light is flashing, it indicates that a configured
value has been changed, and the user must store the
new value before proceeding. Active only in
Programming mode.
7 -TUNE Button - Used for starting and stopping the
Autotuner function. The LED blinks while tuning is in
progress. This button functions as a SET button during
configuration. The Red SET light (8) below the TUNE
button will be lit when this alternate mode is active.
8 - SET Light-When this Red light is On, the alternate
mode (SET) fo the TUNE button (7) is active. This light
will only be lit when the controller is in Programming
mode.
May 1991
UM6.1:DPR900:9iM
Page 38
3-2
Controls and Indicators
9 - Output signal vertical bargraph display (O-1 00%).
10 - PROG Button - Switching button for selecting the configuration
mode. The red LED is lit during configuration. Selecting the
configuration mode also lights the SET and STORE lights.
11
- increase/Decrease Buttons -ON, Yellow, output signal can be
stepped up/down one point at a time. These buttons are lit and
active only when the controller is in the Manual mode.
12 - Increase/Decrease Buttons -ON, Green, setpoint and/or the
configuration value can be stepped up/down one point at a time.
These buttons are lit only when the controller is in the
configuration mode or the setpoint is being manipulated.
13 - SP Bargraph -Analog setpoint (SP) vertical bargraph display.
14 - PV Bargraph -Analog process value (PV) vertical bargraph
display. If alarm limits apply to the PV and are set in the
controller, such limits are indicated by brighter bars on the
display.
15 - SP - Setpoint light. Flashing or lit when setpoint is indicated on
digital display.
16 - C - Lit when communication has been configured
Press any of the four illuminated increase/decrease buttons, 11 or 12,
to change the displayed value one increment (0.1 percent of
measuring range). Holding the button down will continue to increase
or decrease the value until the button is released.
The SP or configuration value buttons (12) also make changes in
increments of 2.5% of measuring range. To increase/decrease this
way, first press and hold the desired direction button, and then press
the opposite button, The displayed value increases or decreases in
increments of 2.5% of the full measuring range.
3.2
Digital Display
The digital display can indicate several different functions:
n
Process value (normal display)
n
Setpoint
n
Alarms
n
Fault codes
n
Any analog input
n
Function codes and associated parameter setting (only during
configuration).
The following paragraphs address the displays available and give an
example of each.
May 1991
Page 39
Controls and Indicators 3-3
3.2.1
3.2.2
3.2.3
3.2.4
( (EQ (
I
I
DPR91c-89
Process Value
During normal operation the process value is displayed with the
proper engineering unit.
Setpoint
When either of the green increase/decrease buttons is pressed, the
setpoint is shown on the digital display. SP will be displayed on the
left. After 5 seconds, the display returns to the process value.
Alarms
A flashing H or L indicates that a high or low alarm limit has been
reached. High-high and low-low alarm limits are indicated by a faster
flashing rate. Alarm indications are displayed until the alarm
condition is corrected.
Fault Codes
The types of fault codes displayed are:
n
Wrong button error
n
Warning
n
Fatal error.
An attempt to perform an improper operation by pressing one of the
controller buttons (attempting to switch in computer control when it
has not been configured), will cause Error to appear on the display
for a few seconds.
A flashing E indicates a warning. Press the PROG button to check
the type of warning condition present (refer to fault codes in
Appendix A).
The fault can be acknowledged by pressing the SET button or saved
by pressing the PROG button. If several faults are present, they are
displayed by pressing the green increase/decrease buttons.
The display may be returned to the process value by pressing the
PROG button twice.
May 1991
UM6.7:DPR900:9102
Page 40
Controls and Indicators
&Tj
Err n indicates the controller has a fatal error affecting the DPR910
Err 2
function (refer to fault codes Appendix A). This type of fault cannot
be acknowledged and must be referred to maintenance personnel.
DPR91wx4
3.2.5
Analog Inputs
This function is intended for personnel involved
with configuration.
Any analog value can be shown as a percentage by selecting
I value.
FCODE 143. The value is displayed as X nnn , where X is the input
reference as shown in the following table, and nnn is the percentage
Ref
Signal
1 All in Engr Units
2 Al2 in Percent
3 A13 in Percent
4 A14 in Percent
5 Al5 in Percent
3.2.6
Display Priorities
Because the left side of the digital display can show a number of
different functions, the displays are given priorities.
The process value or the analog input/arithmetic block values are
displayed for half the time and the rest of the time, the fault codes,
autotuning phases and alarms are shown. When setpoint is shown, or
the controller is in the Programming mode, no other functions are
displayed.
UM6.l:DPR900:9102
May 1991
Page 41
Controls and lnd;cators
3-5
3.3
3.3.1
100
90
60
70
60
50
40
30
20
10
n
PV % SP
Bargraph Displays
Process Values
The process value bargraph displays the process value or any
deviation alarm limits which may have been set. The two types of
alarm limits are high/low and deviation alarms. Only one type may be
present at a time.
High/low alarms are indicated by a brighter bar for each alarm
setting. A maximum of two alarm points may be set. The upper and
lower bright bars indicate the high-high and low-low alarms. If the
alarm points are separated by less than 2.5%, only one bar is
shown.
Deviation alarms are shown in the same manner as high/low alarms.
The alarm limits however, are set relative to the setpoint and change
when the setpoint changes. If the alarm limits are separated by less
than 2.5%, only one bar is shown.
The display at the left indicates a PV low setpoint deviation alarm of
25%. The display at the right indicates PV alarms set at 82 and 50%.
Setpoint
The setpoint bargraph normally displays the setpoint value. If the
point ramp is in operation, the setpoint final value is shown as a
brighter bar during the ramp operation period.
In the display shown, the final operator set ramped setpoint is 87%,
while the current setpoint is 75%.
Output Signal
The reading of the output signal display is dependent on the mode of
operation selected.
May 1991
lJM6.1:DPR900:9102
Page 42
3-6
Controls and Indicators
3.4
3.4.1
D
0
OPERATION
PROG
PROGRAMMING
3.4.2
AUTO
MANUAL
In Auto (Remote) control, the output signal bargraph displays a dull
control signal as O-l 00% or 100-O% (determined by the
configuration). The resolution in this mode is 5%. For actuators with
position feedback, the actuator position can be indicated on the
bargraph. In the example on the left, the indicated output signal is
60%.
In the Manual mode, the figure on the right indicates the manually
adjustable output signal with increased resolution to 0.5%. The
normal brightness bargraph (graduated in tens as indicated) shows
60% and the brighter bar (graduated on the left side of the scale in
units O-10) shows 3%. This combination represents a manually
adjusted output signal level of 63%.
Operating Modes
Operation/Programming
In the Operation mode, the front panel buttons perform their normal
functions for operation and setting of the setpoint and output signal
values.
In the Programming mode, the function buttons have alternative
functions for programming (and alteration of the controller type
during cascade control). The Programming mode should only be
used by configuration personnel.
The DPRSOO configuration settings (FCODE l-46)
can be altered during operation by the
Programming mode. Changes to FCODE’s higher
than 100 require the controller to be switched out
by setting it to Manual.
Auto/Manual
In Auto control, the PID control system is in operation. In Manual
control, the PID control system is switched out and the input signal
can be controlled directly from the controller’s increase/decrease
buttons. Normal operation is with the DPRSOO in the Auto mode.
Switching between Auto and Manual can be done by:
uM6.1:DPR900:9102 May 1991
Page 43
3-7
3.4.3
D
0
R
LOCAL
COMPUTER
DPR91c-048
3.4.4
r-73
I 4 (Locall
INTERNAL
EXTERNAL
(Remote)
DPR91&@d9
3.4.5
3.5
n
pressing the M button
n
an external signal connected to one of the controller’s digital
inputs
n
a signal from a remote computer.
Computer/Local Control
In Computer control, some of the controller’s functions are controlled
from a remote computer. In Local control, the front panel controls are
operational.
If the controller is not connected to a remote computer, Local is the
only mode used. If the DPRSOO is connected to a remote computer,
Computer mode is the normal mode of operation.
Switching between Computer and Local control can be done by:
n
pressing the C/L button
n
an external signal connected to one of the controller’s digital
inputs
Remote/Local Setpoint
In Remote setpoint, the controller setpoint is taken from an external
source, usually a signal connected to one of the controller’s analog
inputs. In Local setpoint, the setpoint is set by the controller’s
increase/decrease buttons.
If the controller is not supplied with a remote setpoint signal, Local is
the only mode used. Remote setpoint is blocked by configuration.
Switching between Remote and Local setpoint can be done by:
n
pressing the R button
n
an external signal connected to one of the controller’s digital
inputs.
Normal Operating Modes
m Single controller operation -Auto, Local, Extra Internal setpoint
n
Controller with external setpoint signal operation -Auto, Local,
Remote setpoint
m Computer control operation -Auto, Local, Remote setpoint (R
button has no function).
Manual Control of Output Signal
1. Switch to Manual mode by pressing the M button. The yellow
increase/decrease buttons light.
May 1991 lJM6.1:DPR900:9 102
Page 44
3-8
Controls and Indicators
(FISWIR)
3.6
Establishing a Setpoint
3.6.1 Local Setpoint (LSP)
The M button also lights to indicate Manual when
the output signal can be controlled by remote
signals. The yellow increase/decrease buttons are
disabled.
The output signal indicator changes to show the output signal with
0.5% resolution, compared to the normal 5%. This is done by
combining the normal bargraph with a brighter bar. The normally
bright column indicates the ten units, and the brighter bar single
units.
Example:
100
B-:
80
TENS
60 (=60)
4a UNITS
2o (= 3)
0
\\I/
0:
0
M
’
DPFwD48**
The normal brightness bargraph shows 60% and the brighter bar
shows 3%. This combination represents an output signal level of
63%.
If the increase/decrease button is held until the single unit bar goes
beyond 0 or lOO%, the bargraph indication will revert to its normal
5% resolution and the stepping speed will increase to 5% per step.
2. Use the yellow increase/decrease buttons to step to the required
output signal value. if the output signal has its limits applied for
Manual setting, the bargraph indication will stop at the limit.
3. Return to the Auto mode by pressing the M button.
The controller must be in the local mode to enter a local setpoint
(LSP). The LED in the R should be off. If the LED is lit, pressing the R
button switches it back to the the local control mode.
uM6.1:DPR900:9102
May 1991
Page 45
Controls and indicators
3-9
3.6.2
To set the value:
1. Momentarily press and release either the setpoint increase or
decrease button (12). The green LED in both buttons lights,
indicating that the setpoint value may be changed.
The controller must be in the proper mode or the
local setpoint value will not take effect. Ensure that
the remote button LED is not lit and the green
setpoint increase/decrease button LED’s are lit
before attempting to alter the setpoint. During local
setpoint entry the digital display shows the local
setpoint value. The SP light to the left of the
display illuminates.
2. Set the new setpoint value using the increase/decrease buttons
(12).
3. The controller displays the new setpoint value in the digital
display for about seven seconds after release of the button, then
reverts to the configured display value.
If setpoint limits are configured in the controller, the controller does
not accept values outside such limits, The value shown on the digital
display will remain constant once a configured limit has been
reached. The SP bargraph also shows a full scale reading, O-100%
of the configured setpoint range.
Remote Setpoint/Extra Internal
SetpointXomputer Setpoint
The R button enables the remote setpoint value (RSP), extra internal
setpoint value (ESP), or the computer-generated setpoint value
(CSP). The green LED in this button lights to indicate Remote control.
The RSP value may be a setpoint value from another device, an ESP
value stored in the controller, or a CSP sent via the RS-485
communications link.
With the controller in the remote mode, display the actual RSP value
on the digital display by momentarily pressing either the setpoint
increase or decrease button. The R button LED remains lit as a
reminder that the displayed setpoint value cannot be altered manually.
May 1991
UM6.1:DPR900:9102
Page 46
3-10 Controls and Indicators
[FISHER”]
3.6.3
3.7
The Local setpoint cannot be changed while the
controller is in the remote mode. If the user
attempts to change the setpoint value in the
remote mode, the controller flashes ERROR
Switching Between Remote and Local
Setpoints
Switch from the RSP, CSP or ESP mode to the LSP mode by using an
external digital signal
or
switch manually, using the R (remote) button.
Manual switching via the R (remote) button always overrides the
digital signal or RS-485 signal. Remote/Local switching occurs only if
the controller is in the Remote mode.
Changing Configured Values: Ratio,
Bias and Extra Internal Setpoint
The RSP input value received at Al2 can be configured to be modified
before being used as the controller’s RSP.
Al2
FCODE 120 _ FCODE 1 FCODEZ __
Use FCODE 1 and 2 to adjust the ratio and bias values used in
conjunction with the RSP or the internal calculation functions (FCODE
107 and 108). Both values reside within the controller configuration
parameters; therefore the user must enter the configuration mode to
change these values. Press the PROG button to enter the
configuration program. Then use the TUNE button to advance to the
appropriate FCODE. After each FCODE number, the controller
indicates the current value stored. Use the increase/decrease buttons
(11) to change the value. Press the flashing R button to save the new
value.
Function Parameter FCODE Range Unit Increment Default Selected
Value Vallle
Ratio Gain 1 0-9.99 - 0.01 1
Bias zero level offset 2 +I- M
a”Y
1 digit 0
lJM61:DPR900:9102 May 1991
Page 47
Controls and Indicators
3-11
The controller can also be configured to switch to a preconfigured
ESP value upon certain discrete switching and fault situations, Use
FCODE 12 to configure this value.
Function Parameters FCODE Range Unit Increment Default Selected
Valtle V&k?
Extra Setpoint 12
MI?E.
a”Y
1 digit 0
Internal SP value
3.8
Computer Control
Computer control is available when the red C in the upper left of the
digital display is lit. Use the R button to select computer control when
it is available. When computer control is active the R button green
DPAm2417
LED is on. When the controller is in local control mode, the computer
can read values from the controller. Under computer control, two
discrete input signals control the setpoint value, the output signal or
accept control signal changes via the KG-485 communications link.
The following conditions apply to computer control:
n
If the controller has been switched to computer control (R button
lit), switching between computer mode and local mode is
accomplished via an external discrete signal.
n
If the external discrete switching signal is deactivated, the
controller switches to local mode and the green LED in the R
button remains lit.
n
The controller then uses the LSP, RSP, or ESP, depending on
which options are used for FCODE 141 and 142.
3.9 Autotuner Operation
The autotuner is a utility for automatic setting of PID parameters. This
function can also be used with non-linear processes when used with
gain. Before tuning is started, ensure that the process is stable at a
position close to the required working point, i.e. SP = PV.
With the controller in either Remote, Auto or Manual, use the TUNE
button to start the autotuner. The green LED in the button blinks while
the autotune mode is active. For slow processes the autotune function
may take as long as 32 hours, the maximum time the autotuner will
run. The controller returns automatically to auto mode when the
tuning procedure is complete.
May 1991 LJM6.1:DPR900:9102
Page 48
3- 12
Controls and Indicators
D
A
To abort autotuning, press either the TUNE button a second time or
TUNE
press the M button. Pressing the TUNE button returns the controller
to either Auto or Remote mode. The controller always returns to the
auto/remote mode from the autotune function. Pressing the M button
stops the autotune function and switches the controller to the manual
Q
mode. If the user starts the autotuner when the controller is in the
TUNE
M
manual mode, the controller automatically switches to the auto
mode, completes the tuning cycle, and returns to the auto mode
DPR900-016
when tuning is complete.
Alarm Indications
100
90
80
70
;,,,:,
60
50
40
30
20
10
~~
The PV bargraph display shows the currently set alarm limits as
brighter bars. Up to two alarms can be displayed. If a limit is
exceeded, a flashing L or H is shown in the left position of the digital
display. A discrete output may also indicate any alarms that have
been configured.
In the illustration, a high alarm is set at 82.5 and a low alarm is set
at 47.5.
::
,,
::
O PV%SP
LlPRso0-018
UMfi.l:DPR900:9102
May 1991
Page 49
Controls and Indicators
3-13
3.11
The H and the L in the digital display flash faster (2X) than the
normal high and low alarm indications to show that the high-high or
low-low limits have been exceeded.
Error Indications
If the controller detects a fault during continuous automatic
self-testing, Err n, or a flashing E appears in the left character
position of the digital display. When this happens the user can press
the PROG button to display the error code. Refer to Fault Codes,
Appendix A.
If more than one error code occurs, each code may be called up in
turn by pressing the setpoint/configuration increase/decrease buttons while in the Programming mode.
There are two ways of exiting the error indication mode:
1. Pressing the PROG button once more puts the controller in the
configuration mode. The error codes remain stored in the controller
and may be examined again, if necessary. Pressing the PROG
button a third time takes the controller out of the configuration mode
and returns the displays to their normal states.
2. Pressing the TUNE button also switches the controller to the configuration mode, but erases the error codes. Pressing the PROG
button again returns the controller to the normal display.
Error codes lower than 101 indicate fatal errors which seriously ef-
fect the controller function
May 1991
UM6. i:DPR900:9102
Page 50
3-14
Controls and Indicators
[FISHER”)
Clearing an error code upon entering the
configuration mode, may not clear the code due to
required configuration changes. Upon completion
of these changes and exiting the programming
mode, the original error code may still be
observed. Re-enter the configuration mode a
second time to clear the error.
3.12 Bumpless Transfer
Switching between Auto and Manual is bumpless (unchanged) in both
directions. This does not apply if the DPRSOO is used as a simple
proportional (P) controller. In a P controller, the output signal in Auto is
always 50% when the process value is equal to the setpoint value.
Deleted
Change 7 -September 7991
Page 51
4
4.1
4.2 Setting Principle
Function Codes
Selecting and Changing Function
Codes
Function code settings (FCODE’s) determine the internal values for:
l
Tuning Parameters
n
Configurable Options
These values are determined by configuration and should be entered
by the user in the FCODE tables.
Setting and checking of these FCODE’s in the DPRSOO can be carried
out at one time with the instrument in the Programming mode.
The instrument need not be connected to sensors and actuators for
FCODE setting. If, however, setting is to be performed without any
connection to A01, Terminal 9 and 10 must be short-circuited to
prevent an open-circuit error message (ERR 4) from being initiated.
All FCODE’s can be altered during operation, however, to change
configuration options, the controtler must be in the Manual mode.
To set or alter FCODE 101 or higher, the DPRSOO
must be set to the Manual mode. This ensures
that the output signal is under local control and
cannot be provided with an unwanted output
value.
May 1991
UM6.1:DPR900:9102
Page 52
4.2.1
FCODE 24,25 and 26 must be set for the
appropriate measuring ranges before any other
FCODE is selected. This is because many other
parameters use the measuring range limits as
reference. If the measuring range is altered,
related limits and alarms are automatically
adjusted to suit the new range. (This does not
apply to cases where the DPRlOO Temperature
Input Module is used since its measuring range is
set automatically with FCODE 118.
Tuning parameter setting and configuration function selection take
place in the configuration mode.
Press the PROG button to enter the configuration mode. Pressing the
PROG button illuminates the red light in the button and the red
STORE and SET lights. These lights indicate that the secondary
functions of the R and TUNE buttons are active.
If the controller is set for authorization check (FCODE 139), the
configuration values may be read only when the STORE light is Off
Most configurable controller functions and tuning parameters can be
changed while the controller is operating. For safety, vital controller
functions cannot be altered during operation. The controller must be
in the Manual mode to change any functions with FCODE’s greater
than 100. When changes are made during configuration, either the
SET or STORE light flashes, indicating the appropriate action to be
taken.
A complete list of FCODE’s is provided in Section 5.
Tuning Parameter/Configuration Changes
The authorization check can be temporarily
disabled (without changing FCODE 139) by
pressing the R button immediately after pressing
the PROG button in Step 1.
UM6.1:DPf?900:9102
May 1991
Page 53
4-3
Change tuning parameters according to the following procedure:
Step Button Display Action
1
w
0
PROG
Select program mode; PROG button LED starts flashing.
PROG
or
If an error code is present (e.g. E107), it appears in the digital
El07
display. Call up any additional error codes by pressing either
green increase or decrease buttons.
@@
Leave the error code mode without clearing the error by
pressing,
D
0
PROG
or
Press
TUNE
button to erase the error codes.
2
Q
0
FC 1
TUNE
*
4
v
0
50.50
TUNE
f!P
6 u
0
FC n
R
Authorization check is configured. The configured values
may only be viewed, not changed (Steps 2 and 3). Steps 4
and 5 change values only when authorization check is not
configured.
Step forward (using the green increase button) or backward
(using the green decrease button) to the desired function
code. The
SET
button flashes.
Push the
SET
button to view the current parameter value for
the selected function code.
Using the green increase and decrease buttons, set the new
value in the digital display. The
STORE
button starts to flash,
indicating that the changed value must be stored to take
effect.
Press the
STORE
button to store the new value; the PROG
button starts to flash, and the digital display shows the next
function code.
Call other function codes by using the green increase/decrease buttons, then complete Steps 3 thru
6 to change the parameters.
v
0
27.3
7
Press the flashing
PROG
button; the controller leaves the
PROG
programming mode, and the display shows the configured
display value.
May 7997
Page 54
4-4 Function Codes
To quickly view the current parameters, use the TUNE button. The
, @ ,
display alternately shows an FCODE, then the configured parameter
value. Enter the Programming mode and use only the TUNE button.
1cEqly
FCODE 1
FCODE 1 value is 1 .OO
1-l
FCODE 2
FCODE 2 value is 0.00
4.2.2 Function Selection
Function code 101 thru 145 are used in configuring the controller. The
controller must always be in the manual mode before any FCODE can
be selected. The programming procedure is identical to that described
above for tuning parameter changes, but instead of parameters,
option numbers (C-i-2-3-4-5) are set. Each number represents a
particular function.
When an FCODE is selected for display, the
function (number) currently in force is shown.
tJM&1:0PR900:9102
May 1997
Page 55
Confiouration
5-l
5
5.1
5.2
5.3
Configuration
General
Configuration of the controller follows three stages:
n
Definition of the control problem.
n
Selection of the inputs and outputs.
n
Selection of the required functions (FCODE’s).
The controller is delivered with a basic configuration, permitting it to
be used as a conventional PID controller. All function codes have
been assigned the default values listed in the FCODE tables.
Definition of the Control Problem
Before beginning to look at the controller configuration, the control
application must be carefully defined.
n
Which process is to be controlled?
n
What is to be achieved?
n
Are alarm function needed?
n
Which input and output signals (external components) are
available and what are their signal ranges?
A control system diagram should preferably be drawn up in the form
of a block diagram which will answer the questions posed above.
Selection of Inputs and Outputs
The controller has:
H Four analog inputs: All, A12, Al3, Al4
H Two analog outputs: A01 , A02
n
Four digital inputs: Dll, Dl2, Dl3, D14
n
Two optically-isolated digital outputs for mode indication: 24V/20
mA: DOI, DO2
n
Four digital outputs for alarms and discrete output control: D03,
D04, D05, DO6
May 1991 UM6.1:DF’R900:9102
Page 56
5-Z
Configuration
(FISHER’J
When the controller configuration is fully planned, enter the
configuration options and the tuning parameters. Press the PROG
button to access the configuration mode. The controller is designed to
prompt the user for easy configuration entry. Use the TUNE, and
green increase/decrease buttons, to call the appropriate FCODE’s,
select and enter the functions, and set the tuning parameters.
5.4
Set the measuring range and fix the position of the
decimal point in the digital display, using FCODE
24, 25 and 26 before changing any parameter.
Many parameters use the measuring range limits
as a reference. If the measuring range is altered,
the limits and alarms that refer to the measuring
range adjust automatically. This eliminates the
need for further adjustments.
Function Parameters
Measuring Minimum value
Range Maximum value
Decimal point
FCODE Range Unit Increment Default Selected
VZIllIe VL?lllIfZ
24
r 9999
a”Y
1 digit Min
25 + 9999
a”Y
1 digit Max
26 l-4 - 1 1
Input Signal Assignment
Some input and output signals have definite functions; (e.g. All is
always the process value [PV] input). Other signals, such as Al3, Al4
and DII, D12 can have any one of the assignments shown. The user
assigns one of these options to the signal line, then chooses the valid
signal range and type of input that indicates the active discrete signal.
Signal Assignment Signal Assignment
All Process value
DII
For switching between:
Al2 Remote setpoint o Auto/Manual
A13 External analog signal for: o RSP value to ESP value
o Secondary process value 0 Computer to local control
monitoring sensor
o Forced output signal
0 3.state control o Output tracking
o Min/Max selection D12 For switching between:
o Arithmetic functions o Auto/Manual
o Feedforward signal 0 RSP value to internal
o Gain scheduling signal
alternate signal
Al4 External analog signal for: 0 computer to local control
o Showing control position
o Forced output signal
0 3-state control o Output tracking
0 Feedforward signal D13 Digital control of output signal
0 Gain scheduling signal DDCalternativelysetpoint SPC
0 Output tracking Dl4 Digital control of output signal
o MinIMax selector
tJM61:DPR900:9102 Change 1 -September 1991
Page 57
Configuration
5-3
5.4.1
54.1 .l
m
1...5...9
DPRY”O-58a
5.4.1.2
l--Dial
5.4.1.3
5.4.1.4 Measuring Range
1...5...!3
DPRwh58a
Function Parameters FCODE Range Unit Increment Default Selected
Vallle
Vallle
Analog Time constant All 15 o-9999 * 1s 0
Input
Time constant Al2 16 OK3999 s Is 0
Filter
Time constant Al3 17 O-9999 s IS
0
Time constant Al4 18 o-9999 s
IS 0
The first parameters to be determined are those for the analog input
measuring range, and the number of decimal places to be shown on
the digital display. Use engineering units, such as ft3/hr (m3/hr),
gals/min (liters/min, OF (“C), etc.
It is not possible to assign two different functions to one input. If the
user attempts to assign a second function to an input that has already
been assigned, ERROR flashes on the digital display. When this
happens, the user should assign the function to an unassigned input.
Alternatively, the user may reconfigure the input signal line by
removing the original function.
Analog Inputs (Al)
Current or Voltage Inputs
To use an input as a current input, the appropriate jumper must be
intact.
Jumper 1 = All, Jumper 2 = Al2, Jumper 3 = Al3 and Jumper 4 =
A14.
These jumpers connect 250 ohm resistors in parallel with each input.
To use an input for voltage, the appropriate jumper must be cut.
Fixed or Floating References (Return Lines)
To provide an input with a fixed reference the appropriate jumper must
intact.
Jumper 5 = All, Jumper 6 = Al2, Jumper 7 = Al3 and Jumper 8 = Al4
The jumpers set the common-mode voltage for each input to the
range -5V to +17V. The 5V signal voltage is added to this, giving a
total or 17 +5 = 22V, which can vary by +I- 10%. In order to obtain a
floating reference the appropriate jumper must be cut.
Low-Pass Filter
A first-order, low-pass filter for any of the analog inputs, may be
enabled if required. To enable a filter, use FCODE 15 thru 18 to select
the filter time constant. Set a time constant using the green
increase/decrease buttons on the front panel.
May 1991
Page 58
5-4
Configuration
(FISHER;)
The measuring range is set using FCODE 1 to 3.
Function Parameters FCODE Range
Unit
Increment Default Selected
V&Je
ValLJe
Measuring Min value 24 + 9999 any 1 digit
0.0
range Max value
25 + 9999 any 1 digit 100.0
No. of
26 O-4 1 1
5.4.1.5
The parameters should be inserted in the order
FCODE 26 thru 24 (number of decimals first) to
obtain the correct values.
Example:
A level controller is to regulate between 0.39 and 1.16 inches (10 and
30 mm). The sensor supplies 0 mA for 0 inches (0 mm), and 20 mA
fpr 1.97 inches (50 mm). Set FCODE 3 to 1, FCODE 1 to 0.0 and
FCODE 2 to 500.
Signal Range Selection
Use FCODE 119 thru 122 to select the appropriate electrical signal
range and linearization option for each of the four analog inputs, All
thru Al4. Select one of the options. To enable the square root option
for Al 1, use FCODE 107.
nction FCODE Option No Default Selectel
Value V&e
All
119 4-20mA. 1-W
1 1
O-20mA. 0-W
2
Al2
120 4-20mA, 1-W 1 1
O-20mA, 0-5V 2
4-2OmA, 1+X square root 3
&2OmA, 0%5V, square root 4
Al3 121 4-20mA, 1-W
1 1
O-20mA, 0-W 2
4-ZOmA, I-.5V, square root 3
0-2OmA, 0-5V, square root 4
Al4 122 4-20mA, ILW 1 1
0%ZOmA, 0-W 2
4-20mA. I-W, square root 3
0-20mA. 0-5V, square root 4
Function
FCODE Option No Default
Selected
Value Value
Calculation to7 Disabled 0 0
of Process square root 1
Variable
R = (All x Ratio) + Bias 2
R z All + (Al3 x Ratio) + Bias 3
R = (All x Ratio) + Al3 + Bias
4
R = (All x AI3)(Ratio) + Bias
5
UM6.1:DPR900:9102
May 1991
Page 59
(FE+
Configuration 5-5
When supplying a voltage signal on any of the
analog input signal terminals, ensure that the
appropriate jumper is cut at the back of the
mounting cassette. Cutting the jumper disconnects
the 250 ohm shunt resistor.
Use FCODE 143, to display any of the analog inputs other than the
default (process value, input signal All). When the default value is
used in conjunction with FCODE 106, the value indicated is in
resealed units.
Function FCODE
Option No Default Selected
VallJe Vhle
Normal 143
Display process value 1 1
Display
Display All, in percent 2
Display Al!?, in percent 3
Display Al3, in percent
4
Display Al4, in percent 5
Perwltage Value
The other display options show the analog input values as a
percentage, after filtering (if selected) and linearization (if selected).
When the display shows an analog input other than the process
ra value.
value, the input signal number appears to the left of the percentage
Analog Input Number
The user may configure input signals Al3 or Al4 as reference signals
DPR90~024
for the gain scheduling function. When one of these inputs is used
as a reference signal, the user may wish to configure the selected
reference signal to appear on the digital display by setting the value
of FCODE 143 to option 4 or 5.
5.4.2
Analog Inputs Using DPRIOO Series
Temperature Input Module
The DPRSOO accepts either a 4-20 or O-20 mA signal from a
temperature transmitter, direct RTD or thermocouple
temperature-sensor input via a DPRIOO Temperature Input Module.
Any temperature module connected to the controller sends its input
signal via the All terminals, disabling All for any other input.
When a temperature input module is present, ensure that Jumper 1 is
cut and Jumper 5 is intact. Set FCODE 119 to Option 2 (Al 1 signal
range G20 mA). Also select the appropriate option for FCODE 118.
May 1997
Page 60
5-6
Configuration
(FISHER”)
Function FGODE Option No Default Selected
klU? Value
All Signal 119 4-20mA. I-5V 1 1
Range O-20mA. 0-5V 2
Do not use FCODE 118, unless a DPRIOO
Temperature Input Module is being used. Also,
ensure that the appropriate temperature range is
used (OC or OF).
Function
Temperature
Input All
-CODE Option NO
118 Disabled 0
100 ohm Platinum RTD. “C 1
Type J Thermocouple, ;C
2
Type K Thermocouple, OC 3
Type R Thermocouple, OC
Type S Thermocouple ,OC
100 ohm Platinum RTD, OF 6
Type J Thermocouple, OF 7
Type K Thermocouple, OF 8
Type R Thermocouple, OF 9
Type S Themwcouple. OF 10
Ensure that the square-root extraction function
(FCODE 107) is set to 0 (disabled), if a
temperature input module is connected to the
controller.
When using the PV monitoring function, the
second temperature transmitter (connected to Al3)
must have the same measuring range and
engineering unit (EU) values as the transmitter or
sensor connected to All.
lefault
JkllW
0
lJM6.1:DPR900:9102
May 1991
Page 61
[FIsti~~tj
Configuration
5-7
The resolution is the measuring range shown in
the following table, divided by 4000. The resolution
will not be improved by using limits other than
those in the table. Even though the stated
resolution is fractional, the digital display only
shows degrees in whole numbers.
Module Degrees F Degrees c
TYPO
Range Resolution Range Resolution
100ohmRTD -56-1112 0.29 degrees 50 - 600 0.16 degrees
TYPO
J
32 - 1472 0.36 degrees O-600 0.20 degrees
TYPO K 32 - 2372 0.56 degrees 0 - 1300 0.32 degrees
TYPO R 32 - 2732 0.67 degrees 0 - 1500 0.37 degrees
Tvpe S 32 - 2732 0.67 degrees 0 1500 0.37 degrees
I I
Examples:
A Type R Thermocouple sensor with a DPRIOO Temperature Input
Module has a sensing range of 0 to 1500X. The measuring range
is 0 to 5OO’X, set with FCODE 24 thru 26. The controller sees only
that portion of the sensor signal lying within the defined measuring
range. The digital display now shows temperature between 0 and
5oooc.
The displays can now be further limited by using the setpoint limiting
function to limit the maximum setpoint range (FCODE 106, 9, IO) to
0-300°C. If setpoint limits of O°C and 300°C are entered, the digital
70
display indicates exact temperatures between 0 and 500°C, butthe
60
50
bargraph indicates O°C at 0% abd 300°C at 100%. At 70% on the
40
bargraph, the temperature is 210°C.
30
20
10
0%
May 7997
UM6.1~DP/?900:9102
Page 62
54.3
54.4
Discrete Inputs (DI)
Use FCODE 125 thru 128 to assign discrete input functions to Dll
thru Dl4. The controller recognizes a discrete input signal as active
when voltage is present at the input.
Function FCODE Option No Default Selected
Vallle Vallle
DII 125 Voltage present at input 1 1
NO voltage present at input 2
Dl2 126
Voltage present at input
1
1
No voltage present at input 2
D13 127 Voltage present at input 1 1
No voltage present at input 2
D14 128
Voltage present at input 1 1
No voltage present at input 2
External Discrete Signal Switching (A/M and
R/L) and Signal Tracking
Discrete signals DII and D12 are used to switch modes from auto to
manual and/or from remote to local. While the discrete input allows
changing of states, the initial state must have been enabled from the
front panel (i.e. to go from local to remote, the R button must initially
be set from the front panel). The discrete cannot be used to switch the
controller to the remote mode initially. Mode switching is on the trailing
edge of the discrete signal. Only the M button lights when the
controller is switched remotely. The yellow increase/decrease buttons
do not light, and do not function unless the M button has been
pressed. This activates the local/manual control state.
Setpoint tracking via FCODE 140 does not occur when remote
switching selects the manual mode. This prevents the accidental reset
of the setpoint in cases such as cascade control.
This function also controls the activation of output tracking if it has
been selected
as
active in the manual mode. To control the signal
manually, even after remote switching to manual, the user must press
the M button to activate the yellow increase/decrease buttons.
The controller cannot be switched into the auto mode as long as the
discrete signal remains active. DO1 (Auto/Manual status) is activated
when the controller is in manual mode and remains active until the
controller is in auto mode.
lJM6.1:DPR9Q0:9102 Change 1 -September 1991
Page 63
Configuration
5-9
The user must press the M button to control the
output signal manually even though a discrete
input may have switched the controller to manual
mode. The manual mode yellow increase
/decrease buttons only light after pressing the M
button to indicate that manual control is possible.
When output signals are remotely controlled,
pressing the M button does not light these two
buttons, indicating that they are not locally
adjustable.
Use FCODE 110 to select the function and the input signal line, Dll or
Dl2.
Function
FCODE
Option NO Default Selected
VallK? Value
EXtWlal 110 Disabled 0 0
A/M Track AutolManualmrack switching via DII 1
Switching Auto/Manual~rackswitchingvia D12 2
-I
Use FCODE 111 to select the external remote/local switching option.
Function FCODE
Option NO Default Selected
V&e Value
EXtfXflal
111 Disabled 0 0
WL Remote/Local switching via DII 1
Switching
Remote/Local switching via Dl2 2
Use FCODE 112 to select the option for forced control of the output
signal via Dll or Dl2.
Function FCODE Option
No Default Selected
Value V&B
Forced 112 Disabled 0 0
output
Dll, applies in Auto/Manual 1
Control Dl2, applies in Auto/Manual 2
Dll, applies in Auto only
3
Dl2, applies in Auto only 4
While the external discrete switching signal is
active, it is not possible to return to the auto mode
manually.
Change 1 -September 1991
lJM6.1:DPR900:9102
Page 64
5-10
Configuration
(FISHER”]
5.5
Output Signal Assignments
5.5.1
5.51 .l
One application of external auto/manual switching is cascade
control. Two controllers may be connected as shown in the figure.
Controller 2 is the primary controller, Controller 1 handles switching
and manual control through DO1 connected to the primary
controller. The primary controller’s output signal is prevented from
going to an end point during manual control. The type of connection
shown in the figure, keeps the controllers electrically isolated.
The DPRSOO is capable of providing two analog and six discrete
outputs for communication with external devices.
Analog Output (AO)
The controller can send output signals to the process over either of
two analog output channels (A01 and A02) or over one or two
discrete output channels (DO5 and D06). The output signal from the
PID algorithm may be one of three types selected by using FCODE
102.
1 Function 1 FCODE 1 Option No Default
I
VaILI
lEEed I
I
I I I
I
l(
12
Analog output 1 1
Positioning motor output (DO5
Controller
Signal
and DOEa- 2
Pulse-width modulated output
I
(DO51
3
Analog Output (Option 1)
Choose analog outputs to provide signals to the process in the 4-20
mA or O-20 mA range. Set the signal range using FCODE 123 (AOl)
and 124 (A02).
Function
F
Signal
Range
A01
A02
123
17
124
Option No Default Selected
WW VZllW
4620mA output signal 1 1
D-20mA output signal 2
4-20mA output signal 1
D-20mA output signal 2 2
To configure output signal limits, use FCODE 105.
UM6.1:DPR900:9102
May 1991
Page 65
Configurat;cJn 5-11
Function FCODE Option No Default
Selected
WW Vallle
output 105 Disabled 0 0
Signal Signal limits apply in Auto
Limits IMUlUCi 1
A01
Signal limits apply in Auto only 2
To set the individual High and Low signal limits, use FCODE 7 and 8.
Function ) FCODE 1 Range 1 Unit 1 Increment I Default I Selectedl
Output Signal Lower limit
Limits A01 Upper limit
Value Value
7 O-100 % 1% 0
a O-100 %
1%
100
Use FCODE 115, Option 5 or 6 to automatically select either the Min
or Max signal between the controller’s output signal and an externally
supplied output signal.
Function Function FCODE FCODE Option Option No Default No Default
Selected Selected
Value Value Value Value
Output Output
115 115 Disabled Disabled 0 0 0 0
Signal Sianal
1 1
Processing Min selection enabled 5
Max selection enabled 6
To select an internal signal for output to a recorder or other device via
A02, use FCODE 114.
Function FCODE Option No Default
Value
Selected
VaIlIf3
Calculated Remote setpoint
5.5.1.2 Positioning Motor Output (Option 2)
This option provides PID positioning signals via discrete outputs DO5
and D06. Use this option when connecting to electric actuators
(reversible control motors). The discrete outputs are normally
connected to intermediate relays or contactors (if the load is inductive,
a diode must be wired across the output). The discrete outputs supply
raise/lower pulses to a positioning motor. The minimum resolution is
one sampling period, 0.2 seconds.
May 1991
lJM6.1 :DPR900:9102
Page 66
5
12
Configuration
FCODE 28
lunnino Time
l-l
I I -
When the user sets FCODE 102 to Option 2, the controller sends
raise/lower pulses out on signal lines DO5 (increasing output) and
DO6 (decreasing output). If both discrete signals are active at the
same time, the controller takes no action.
When using the positioning motor output option,
the user must ensure that the controller’s PID
parameters are configured to have integral (reset)
action. This option cannot function in P only or PD
only controller applications.
Use FCODE 27 to specify a positioning motor error signal deadband.
Any required controller adjustment shorter than the chosen deadband
does not result in controller regulation. In addition, the controller
incorporates a block that prevents the control motor from changing
direction more often than every other second.
Use FCODE 28 to set the controller running time. This is defined as
the actual ON time required to stroke the valve/motor from 0 to 100%
or 100 to 0%.
Function
E
Options For
Output
Positioning
Motor
i
Parameters
Raise/Lower
Deadband
Running time for
O-100% chanse
FCODE Range Unit Increment Default Selected
V&N3 V&le
27 L?-9.9
% 0.1% 0.5
26
l-999 s 1s 60s
Several available selectable controller functions require the use of an
actuator feedback potentiometer for the function to be fully utilized.
Those functions include Autotuning, Feedforward, Restart value,
output signal limiting and forced control. The actuator signal will be
shown on the small bargraph on the right side of the faceplate. If no
position feedback is available to the controller, the bargraph displays
0%. Use FCODE 133 to enable the actuator feedback option.
UM61:DPR900:9102
May 1991
Page 67
[FISHER”)
Configuration
5-13
Function FCODE Option
133 Not connected
Conneded to A14
Connected to Al3
No. Default Selected
V&F?
V&e
1 1
2
3
Fisher Controls recommends the use of actuator
feedback whenever possible. If no actuator
feedback potentiometer is used, the user must
short A01 on the connection terminal block. This
will prevent an open-circuit alarm (Err 4) from
being generated.
If required, the controller can be configured to supply the feedback
potentiometer with current from A01 (when not used for other
purposes). Use FCODE 29 to select the current supplied to the
potentiometer.
Function Parameters FCODE Range Unit Increment Default Selected
Value Vallle
Potentiometer Current
output 29
c-20 mA 0.1 mA 5mA
Feedback
The potentiometer signal received at Al4 can be amplified by using
FCODE 30 The selected current multiplied by the potentiometer
resistance must result in a voltage drop of 5V (i.e. the feedback signal
from the potentiometer must be 0-5V for l-100% actuator
positioning.
Use FCODE 31 to set a zero-level offset for the potentiometer.
Function Parameters FCODE Range Unit Increment Default Selected
Value Value
Actuator Gain 30 O-9.99 - 0.01
1
Feedback Zero offset
31
+100 %
1% 0
Signal
Change 1 -September 1991 UM6.1:DPR900:9102
Page 68
5-14
Configuration
[FISHER”]
5.5.1.3 Pulse Width Modulated Output (Option 3)
This option provides for discrete output of the PID signal in a
two-stage pulse-width modulated format through DO5 This output
should be connected through an intermediate relay or contactor. If the
load is inductive, a diode must be wired across the output. An
increasing control signal forces DO5 to conduct for a longer
percentage of the specified cycle time. At the maximum output signal
(loo%), the pulse width equals the selected pulse cycle time and
results in a continuous ON signal. The cycle time must be selected in
relation to the time constant of the process and should be shorter than
five time-constants. The minimum resolution is one controller
sampling period (0.2 seconds).
Use FCODE 32 to define the total cycle time.
+
LP
A0
1-
Cycle Time Minimum Pulse 0.2s
DO5 -
v+
Pulse Length
Increasing Output Signal
DPR9Dce28
Function Parameters FCODE Range Unit Increment Default Selected
V&e Valtie
Pulse-Width Cycle time
32 l-999 s
1s
100
Output Option
When pulse-width modulated output is selected,
A01 must be shorted on the connection terminal
block (Pins 9 and 10).
5.52 Discrete Outputs
The DPRSOO Controller provides for the use of 24Vdc discrete outputs
to be used for external indication of switching. Select active state
definition for DO14 using FCODE 129 thru 132. The controller
defines a discrete output signal as active when conducting or open.
Change 7 -September 1991
Page 69
configuration
5-15
5.6
56.1 Filtering Analog Inputs
5.6.2
Function
FCODE Option
No Default Selected
ValW?
WW
DO1 (A/M) 129
open
1 1
Active State Closed
2
DO2 (WL) 130
open
1 1
Active State Closed
2
DO3 (Aim)
131 Open
1 1
Active State
Closed 2
DO4 (Alm) 132
open
1 1
Active State
Closed
2
Process Value (PV) Handling
Always hard wire the PV to the controller at analog input All. The
controller can monitor, filter, calculate or linearize this value before it is
employed in the controller algorithm. Analog-to-digital (A/D)
conversion of the PV has an accuracy of 0.025 percent of the 0 to
20mA input.
FCODE 143 value determines how the process value appears on the
digital display. Set this value to 1 for a display in physical units, and 2
thru 5 for percentage display.
Function FCODE Option
No Default Selected
Value VallJe
Normal 143
Display process value
1
1
Display
Display All, in percent
2
Display Al2, in percent 3
Display Al3, in percent
4
Display Al4, in percent
5
Select a first-order, low-pass filter for the individual PV inputs via
FCODE 15 thru 18. Set the value of the FCODE to indicate the analog
time constant in seconds, from 0 to 9999. Set the value to 0 to disable
the filter.
Function Parameters
FCODE Range Unit
Increment Default Selected
V&X Value
Analog Time constant All 15 o-9999 s
IS
Input Time constant Al2 16 O-9909 s
15 i
Filter
Time constant Al3
17 O-9999 s
15 0
Time constant Al4
18 o-9999 s
IS 0
Process Value Calculation
The analog input values can be conditioned to provide a required
input to the controller. Square-root linearization can be applied, for
example, in flow measuring with differential pressure sensors. The
control provides onboard selectable square-root extraction.
May 1991
UM6.1:DPR900’9102
Page 70
5-16
Configuration
(FiGEj
FCODE 1 FCODE 2
Ratio Bias
All -
FCODE 15
Filter
Al3 -
FCODE 17
Filter square Root
DPR900-029
Use FCODE 107 to apply square-root linearization or use the
arithmetic function for All.
Function FCODE Option No Default
Value
Selected
Value
~
of Process
Variable
ICalculation
”
R = (All x Al3lfRatio) + Bias R = (All x AI3)(Ratio) + Bias
Apply square-root linearization to analog inputs Al2 thru Al4 using
FCODE 120 thru 122.
Function FCODE Option
Al2 1 120 1620mA. l-5V
No Default Selectel
Value Value
II 1 I
O-20mA; 0-W 2
4-20mA, l-W, square root 3
0-20mA, 0-SV, square root 4
Al3 121 4-20mA. 1-W 1 1
O-20mA, 0-W 2
&20mA, I-SV, square root 3
&ZOmA, 0-5V, square root 4
Al4 122 4-20mA. 1-W 1 1
Use FCODE 1 and 2 to set Ratio and Bias levels
Function Parameters
Ratio Gain
(AM
FCODE Range Unit Increment Default Selected
Value Value
1 O-9.99 0.01 1
IYE, I
Zero level offset
I 2
(;E.(anyIldigit ( 0 1 (
v -.-I
I
I
, .-..il- ,
I I I
I
lJM6.1:DPR900:9102 May 1991
Page 71
(FISHER’I
Configuration
5-17
56.3 Process Value Monitoring and Alarms
5.6.3.1
If the arithmetic function (FCODE 107) is applied
to the process value All, the remaining arithmetic
function (FCODE 108 - RSP calculation) cannot
be used at the same time.
If the square-root function is used on All in
conjunction with selecting PV monitoring, the
second analog input (A13) must have the same
square root measuring range and engineering unit
values. The square-root function cannot be used
with a calculation.
Two sensors can be used in applications where a sensor fault could
have serious consequences. The controller can be configured to
receive two transmitter input signals (All and A13) and monrtor the
status of these signals. The signals are scanned every 200 ms with
the averaged values used as the PV for the PID algorithm. If one of
the signals drifts and the deviation becomes excessive, or a sensor is
disconnected, the suspect sensor is not used.
It is important to note that the controller can be configured to utilize
DO3 and DO4 in one of several ways, including: process value
monitoring, process value alarm, setpoint deviation alarm, and
setpoint ramping indication or alarms.
Process Value Monitoring
Configure PV monitoring using FCODE 22, 23, and 116. The
controller uses the average value of the two signals connected to All
and Al3 in the monitoring-control algorithm. The control algorithm
compares the absolute difference between the previously calculated
mean sensor value and the current sensor value with the maximum
error signal as configured in FCODE 22. If the resulting value for All
is greater than the allowed deviation, an error is reported out on D03.
If the error is for the transmitter connected to Al3, the resulting alarm
is sent on D04. Note that DO3 and DO4 are mutually exclusive-only
one or the other is displayed, not both.
Change 2 -July 1992 UM6.l:DPR900’9147
Page 72
5 18
Configuration
Function Parameters FCODE Range Unit Increment Default Selected
V&&? Valtk?
PKWXSS Maximum deviation 22 MeaS.
a”Y
1 digit Max
Value Delay time 23 o-999 s
IS 10
Monitoring
The controller uses the average of the signals from the previous
sample as the mean value reference.
(sensor 1 + sensor 2)
Mean Value =
n
If the average value exceeds the limit, the controller disables the
sensor that provided the value furthest from the limit, and the
controller uses the signal from the other sensor alone.
The controller continues to monitor the disabled sensor. If that sensor
later orovides a value inside the deviation limit, the controller enables
the sensor and returns to the averaging mode.‘To prevent
unnecessary oscillation from disabling and enabling a sensor that is
sending values near the limit, every sample has a hysteresis of 0.5
percent and a user-selectable time delay (FCODE 23).
If only one sensor is attached, disable PV monitoring using FCODE
116.
Function FCODE Option No Default Selected
V&K? V&X
PV 116 Disabled 0 0
Monitoring,
PV Monitoring, D03, DO4 1
PVIRSP PV Monitoring, not using DO 2
Value
Min selection All/Al3 PV 3
Selection Max selection All/Al3 PV
4
Min selection, AWAl3 SP 5
Max selection, AWAl3 SP 6
If a temperature transmitter is connected to Al3
(PV monitoring) as a second transmitter option
(redundant sensors/transmitters), All must have
the same measuring range and engineering unit
values.
Discrete outputs DO3 and DO4 indicate the status of the averaged
analog inputs when the user selects FCODE 116, option 2. When the
All sensor is disabled, the controller activates D03; when the Al3
sensor is disabled, the controller activates D04.
uM6.1:DPR900:9102 May 1991
Page 73
Configuration
5-19
5.6.3.2 Process Value Alarms
DO3 and DO4 outputs can indicate only one of the
following: sensor status, PV alarms, setpoint
deviation alarm limits, or setpoint ramping.
The use of the PV monitoring function precludes
the use of the Min/Max selection function for both
the PV and remote setpoint.
There are five alarm options and two possible limits for process value
alarms. Each alarm option uses the same limits. Use FCODE 103 to
set type of alarm.
Function FCODE Option
No Default Selected
V&e V&&?
PWXZ?SS 103 Disabled 0 0
WlX High/low alarm 1
Alarm High alarm only 2
Low alarm only
3
High/High-High alarm 4
Low/Low-Low alarm
5
Process value alarms, setpoint deviation alarms,
sensor status, and setpoint ramping all use DO3
and D04, and are mutually exclusive. If more than
one of these functions is set at a time the display
indicates ERROR during configuration.
The following table shows which outputs carry the selected alarms.
Only one of the indications can be on at any given time.
Change 2 -July 1992
UMtIi:DPR900:9147
Page 74
5-20
Configuration
Discrete
FCODE 103 Options
output
1 2 3 4 5
DO3
L - L H* LL*
DO4 H H - HH* L’
l
DO3 and DO4 are mutually exclusive. Only one alarm at a time is
indicated. For example, when DO4 goes on DO3 goes off.
Set the low alarm limit using FCODE 3 and the high alarm limit via
FCODE 4.
Function Parameters
Process Limit 1
V&le Limit 2
Alarm
Limits
FCODE Range Unit Increment Default Selected
V&B?
V.he
3 MS3.5.
any
1 digit Min
4 Range
any
1 digit Max
The digital display indicates a lower limit alarm for the LOW,
HIGH/LOW, or LOW/LOW FCODE 103 options by an L that flashes to
the left of the displayed value.
For FCODE 103 HIGH, LOW, and HIGH/LOW options, the display
indicates a higher limit alarm by a flashing H or L to the left of the
displayed value.
When the user configures HIGH/HIGH or LOW/LOW alarms the
display indicates the second high alarm or the second low alarm by
an H or L that flashes faster (2X) than the normal alarm display.
Recall that the PV bargraph shows the configured alarm limits by
brighter bars. However, it is possible to set limits outside the area
shown by the bargraph that will set off an alarm if they are exceeded.
The alarms may be sent out via discrete output D03, for lower
alarms, and DO4 for higher alarms if DO3 and DO4 are not
configured to carry process value alarms, setpoint deviation alarms,
setpoint ramping, or is configured to monitor sensor status. The
alarms have a hysteresis of 1 percent of the configured range.
Both high and low alarm limits may be set, but
only one at a time is active if FCODE 103 is set to
Option 2 or 3. When FCODE 103 Options 4 and 5
are configured, the two alarm limits become
high/high or low/low limits.
iJM61:DPFWO0:9147 Change 2 -July 7992
Page 75
Configuration
5-21
5.6.3.3 Deviation Alarm Limits
The DPRSOO is capable of externally indicating setpoint deviation
alarms, provided that absolute alarms have not been selected.
Configure setpoint deviation alarms using FCODE 104. The controller
measures deviation and activates deviation alarms for the process
value relative to the current setpoint value as shown in the figure.
These alarms have a hysteresis of 1 percent of the configured range. 1
Function FCODE Option
NO Default Selected
Value Value
Deviation 104 Disabled
0 0
Alarm Enabled
1
Selection
- Positive -
DO4 is activated
Deviation
DO4 is deactivated
and H flashes and H stops flashing
PV alarms, setpoint deviation alarms, sensor
status, and setpoint ramping all use DO3 and DO4
and are mutually exclusive. If more than one of
these functions is set at a time, the display flashes
ERROR.
Use FCODE 5 to set the setpoint negative deviation limit in the range
0 to the lower measuring range limit.
Use FCODE 6 to set the setpoint positive deviation limit in the range 0
to the upper measuring range limit.
Function Parameters
Deviation Negative limit
Alarm Positive limit
Limits
FCODE Range
Unit
Increment Default Selected
Value Value
5
W-W
a”Y
1 digit -Ma
6
‘W+M) any
1 digit +Max
Brightly lit bars on the process value bargraph indicate the setpoint
deviation alarm limits. The deviation alarm limits interact with the
setpoint value and change automatically if the setpoint value is
altered.
Change 2 -July 1992
Page 76
5-22 Confrgoration
I”‘nE”“)
5.6.3.4
For FCODE 103 HIGH, LOW, and HIGH/HIGH options, the display
indicates a higher limit alarm by a flashing H or L to the left of the
displayed value.
A flashing H indicates a positive deviation alarm and a flashing L
indicates a negative alarm on the digital display.
The deviation alarms may be sent out via discrete output D03, for the
negative alarm and D04, for the positive alarm, if DO3 and DO4 are
not configured to carry PV monitoring status, PV alarm, or
setpoint-ramping information.
MidMax Analog Input Selector
As an alternative to PV monitoring, the minimum or maximum signal
can be selected between analog inputs All and Al3 using FCODE
116, Option 3 or 4.
5.6.4
I
All
A,3 ;JTiqpv
1 I
DPRQ00-031
The selected signal is used by the controller as the PV. The MinIMax
comparison is made
after
performing any signal processing functions
that have been enabled.
The Min/Max function uses only analog inputs All and Al3 and cannot
be used if the PV monitoring function is in use.
Function
FCODE Option No Default
Selected
V&Je WlJe
PV 116 Disabled 0 0
Monitoring.
PV/RSP Min selection All/Al3 PV
3
V&e
Max selection All/Al3 PV 4
Selection
Signal Selector - Analog Output 2 (A02)
The user may configure the controller to send a specific internal value
out on A02 using FCODE 114. This output is scaled exactly the same
as the PV/SP bargraph displays. Option 2 of FCODE 114 refers to the
actual setpoint active in the controller. Option 3 is only local setpoint,
regardless of the installed configuration. Option 4 is the RSP value
after Ratio (FCODE 1) and Bias (FCODE 2) have been applied, when
those options are configured. Option 5 is the internal output signal.
UM6.1:DPR900:9102
May 1991
Page 77
Function FCODE Option No Default Selected
Vahe Value
output
114 Disabled 0 0
Selector Process value
1
A02
Active setpoint
2
Local setpoint
3
Calculated Remote setpoint 4
Internal output signal 5
Set FCODE 124 to select the A02 output signal range:
Function FCODE Option No Default Selected
Vaille Value
Signal 124 4-20mA output signal
1
Range
0-20mA output signal 2 2
A02
If A02 has been configured using FCODE 114,
Option 1-5 and there is no circuit path between
pins 11 and 12, the controller self-test reports an
Error (E 103). The self-test is looking for the
minimum 4 mA signal based on the configuration
Either configure to FCODE 124, Option 2 or
complete the output circuit between Terminal 11
and 12 with a jumper wire.
The A02 output signal represents the actual
bargraph value (O-100%). If the setpoint limiting
function (FCODE 106) is enabled, the output
signal is resealed to represent O-l 00% of the
limited output span, not necessarily the full SP or
PV potential.
5.7 Setpoint Handling
This section describes the five possible sources for the controller
setpoint.
May 1991 uM6.1:DPR900:9102
Page 78
5-24
Configuration
[FISHER”]
1 - Local internal setpoint (LSP)
2 - Extra internal setpoint (ESP)
3 - Remote setpoint (RSP)
4 - Computer-controlled setpoint (CSP)
5 - Externally controlled via digital signals (SPC)
The user configures the setpoint source the controller uses via
FCODE 142.
Function
FCODE
Option
NO Default
Selected
V&e V&K?
Automatic
142 Disabled 1
1
Setpoint Switches to remote setpoint 2
Switching
Switches to extra internal setpoint 3
When option 2 is configured and the R button is pressed, the
controller switches to the RSP value.
When option 3 is configured and the R button is pressed, the
controller switches to the ESP value.
When external remote or local switching capability is configured, an
external discrete signal connected to either DII or D12 can remotely
activate the switch. Remote switching is selected via FCODE 111.
Function FCODE Option No Default Selected
ValUe Value
External 111 Disabled 0 0
WL
Remote/Local switching via Dll
1
Switching Remote/Local switching via DIZ 2
When remote switching via discrete inputs is configured and the
signal line is inactive, the controller switches to LSP control. When the
discrete input returns to the opposite state, the controller reverts to
using the RSP value (assuming the R button is still lit).
5.7.1 Local Setpoint (LSP)
When no setpoint options are configured, the controller accepts a
local setpoint (LSP) value, entered with the green increase/decrease
buttons. Set the LSP value according to the instructions in Section 3,
Establishing a Setpoint.
A local tracking option is available for selection when using LSP
control. This option provides automatic setpoint tracking when the
controller has been placed in the manual mode via the manual button.
tJM61:DPR900:9102 May 1991
Page 79
C0nfkJurati0n 5-25
5.7.2
0
8
b-
LSP
0
G
SP
Use FCODE 140 to select the LSP tracking option.
Function FCODE Option
NO Default Selected
Vallle Vallle
Setpoint 140 Disabled
1 1
Tracking
Tracks remote setpoint (RSP/ESP) 2
0-w
Tracks PV in Manual
3
The LSP tracks the PV in manual ONLY when the
manual command comes from the front panel. If
manual mode is forced via a discrete input, Option
3 does not take effect.
Extra Internal Setpoint (ESP)
The user may set a fixed extra internal setpoint value or configure the
extra internal setpoint value to track a remote setpoint value. In case
of computer failure, the controller continues to operate, using either
the fixed extra internal setpoint value or the last RSP value received.
A12
0
R
FCODE 142 _
4C
SP
Use FCODE 12 to select the fixed value option.
Change 1 -September 1991
UM6.1:DPR900:9102
Page 80
5-26
Configuration
(FISHER”]
Function Parameters FCODE Range Unit Increment Default Selected
V&N? Value
Extra Setpoint value 12 MSIS.
a”Y
1 digit Min
Internal Range
Setpoint
FCODE 12 defaults to the lower measuring range
value as set in FCODE 24.
Function
FCODE OptIon NO Default Selected
V&e
Value
Automatic 142 Disabled
1 1
Setpoint Switches to remote setpoint 2
Switchmg Switches to extra internal setpoint 3
The ESP is functionally a RSP. The R button LED remains lit when
this setpoint is active, as a reminder that manual setpoint entry is not
possible. If FCODE 142 is set to Option 3, switching to extra internal
setpoint enabled, the extra internal setpoint is displayed in the remote
mode. Simply press one of the green setpoint increase/decrease
buttons to view the current digital value of ESP when active.
The local setpoint can be made to track both ESP and RSP. Switching
can be done manually or using a discrete input signal. FCODE 140 is
used in this case, however the ESP replaces the RSP in the
description. Select the LSP tracking option using FCODE 140.
Function
FCODE Option NO Default Selected
Value
Value
Setpornt
140 Disabled 1 1
Tracking Tracks remote setpomt (RSP/ESP) 2
WY
Tracks PV ,n Manual
3
The manual button overrides both the remote and
extra internal setpoints, when they are active.
When the controller is in the manual mode, the
local setpoint can be set but is not in use.
UM61:DPR900:9102 Change 1 -September 1991
Page 81
Configuration
5-27
Remote Setpoint (RSP)
The DPRSOO can be configured to receive an externally generated
signal and use it as a remote setpoint (RSP). The controller receives
the RSP value via analog input Al2 and uses this, or the extra internal
setpoint, as the setpoint value when the user pressed the R button.
The user may condition the incoming remote signal using the
following functions:
Function Parameters FCODE Range
Unit
Increment Default Selected
Vallle Vallle
Ratio Gain
1 o-9.99 0.01 1
(A1.3
J
Function
Parameters
FCODE Range Unit Increment Default Selected
V&e V&e
Bias Zero level offset
2 + Meas.
=“Y
1 digit 0
W)
Range
Function Parameters FCODE Range
Unit Increment Default Selected
Value
ValUe
Filter Al2 Time constant 16 o-9999 s
IS
0
Function FCODE
Option NO Default Selected
Value
V&X
Signal
120 4-ZOmA, 1%5V 1 1
Range O-ZOmA, 0-5V 2
VW
4-ZOmA, l-5V, Square root 3
C-ZOmA, C-5V. Square root
4
An arithmetic expression (or calculation), can be selected using
FCODE 108. The result is used as the RSP input. The values of
Ration and Bias are determined by FCODE 1 and 2.
I I
Al2 -
FCODE 16 FCODE 120
Filter Square Root
FCODE 106
Arithmetic
- RSP
A,3 _ FCODE 17
FCODE 121
Filter
- Square Root
DPR900~-034
May 1991
UM6. I:DPR900:9102
Page 82
5-28 Configuration
Function FCODE Option
No Default Selected
ValW! ValUe
Calculation 108 Disabled
0 0
of Remote R = (Al2 x Ratio) + Bias 1
Setpoint
R = Al2 + (Al3 x Ratio) + Bias 2
R = (Al2 x Ratio) + Al3 + Bias 3
R = IA12 x AI3)fRatio) + Bias 4
(3
4
Note
If an arithmetic function has been selected for the
PV (FCODE 107 - PV calculation), this function
cannot be used. Two arithmetic functions cannot
be used simultaneously for both PV and RSP.
Al2 can be linearized to the square root law
through FCODE 120. This operation is performed
before any arithmetic function is applied.
I I
7l
RSP c,
The controller receives the remote setpoint value via A12. When the R
button is pressed, the RSP or ESP, when configured to do so, is used
as the setpoint value, depending on the setting of FCODE 142.
Function FCODE Option
No. Default Selected
V&le Value
Automatic 142 Disabled 1
1
Setpoint Switches to remote setpoint 2
Switching Switches to extra internal setpoint 3
UM6.1:DPFt900:9102 May 1991
Page 83
5.7.4
If required, the digital display can be forced to show the actual RSP
value rather than the default PV value. Set FCODE 143 to Option 3 to
show the setpoint value received on Al2 in the digital display.
Function FCODE
Option No Default
Selected
V?h?
ValUe
1””
Process 143
Display process value 1 1
Vallle Display All, in percent 2
Display A12, in percent
3
Display Al3, in percent 4
Display Al4, in percent 5
1 1
2
III
3
4
5
FCODE 143 Option 1 always displays the scaled
process variable as modified by the setpoint
limiting FCODE. Options 2 - 5 always indicate the
raw input values found at the terminals after
filtering an linearization.
By using a discrete input signal, the controller can be externally
switched to an internally stored value:
n
Controller must be in the Remote mode, R button lit.
n
If an external signal, connected to either DII or D12 with FCODE
111, goes from the active to the inactive state, the controller
switches to the ESP value. The R button remains lit as a reminder
that manual setpoint manipulation is not possible.
If the input returns to the active state, the remote value is switched
back in. Switching between Remote mode (LED lit) and internal mode
(LED not lit) can be done by means of the R button. DO2 is active
when the R button is lit.
Computer-Generated Setpoint (CSP)
See paragraph 5.9, Computer Control, for complete details for
computer controlled setpoint options.
Iday 7991 UM6.1:0PFf900:9102
Page 84
5-30 Configuration
(PISHER”)
5.7.5
0
R
FCODE 142
Blocking
Remote/Local Setpoint Switching
Put the controller in remote mode, enabling the configured remote
setpoint options, by pressing the R button. This enables either an
external remote setpoint or the extra internal setpoint. The user
chooses the setpoint to be enabled via FCODE 142.
Al2
RSP
0
R
_ FCODE 142
,-
SP
FCODE 12 _
ESP
Function FCODE
Option No Default
Selected
ValW? VLlSW
Automatic
142 Disabled
1 1
Setpoint
Switches to remote setpoint
2
Switching
Switches to extra internal setpoint 3
A discrete input signal connected to Dll or Dl2, and configured using
FCODE 111, may switch the controller from the remote setpoint to the
extra internal setpoint value in the following situation:
fl The controller is in the remote mode.
H The connected and configured discrete input signal becomes
active.
In this situation the R button remains lit to indicate that manual control
is not possible. DO2 is active when the R button is lit as an external
indicator of the controller mode.
lJM6.1:DPR900:9102
May 7991
Page 85
5.7.6
Configuration
5-31
When Option 2 is configured and the Fl button is pressed, the
controller switches to the RSP value. When Option 3 is configured
and the R button is pressed, the controller uses the ESP value.
Function FCODE Option
No Default Selected
VAH3
WUEZ
External
111 Disabled
0 0
WL
Remote/Local switching via DII 1
Switching Remote/Local switching via Dl2 2
When remote switching via discrete inputs is configured and the
signal line is inactive, the controller switches to LSP control. When the
discrete input returns to the active state, the controller reverts to using
the RSP value.
The discrete inputs are only able to switch the
controller from remote to local mode. The R button
is the only way to return the controller to remote
from local mode.
Setpoint Tracking
The user may configure the ESP to track the RSP via FCODE 140,
Option 2. Switching may be accomplished manually or automatically
via an external discrete signal. The tracking function, however is
enabled only with a manually entered command.
Setpoint tracking allows the user to configure the LSP to track the PV
when the controller is in the Manual mode, provided the M button has
been pushed or the controller has been switched to manual via an
external computer. It does not track if the controller has been switched
via a discrete input.
May 1991
lJM6.1:DPR900:9102
Page 86
5-32
Configuration
5.7.7
I-J
LSP
Upon return to the auto mode, the LSP value will be the same as the
PV signal. Use FCODE 140 to select tracking of PV in the manual
mode.
Function Function FCODE FCODE
Option Option No Default No Default Selected Selected
Value Value V&X V&X
Setpoint Setpoint
140 140 Disabled Disabled 1 1 1 1
Tracking Tracking Enabled, tracks RSPIESP Enabled, tracks RSPIESP 2 2
(LW (LW
Enabled, tracks PV in Manual Enabled, tracks PV in Manual 3 3
The local setpoint tracks the PV in manual ONLY
when the manual command comes from the front
panel or via computer. If manual mode is lorced
via a discrete input, Option 3 does not take effect.
Setpoint Limits
The user may configure operational limits to the setpoint value, to
prevent the controller from using a setpoint value outside such
configured limits. The limits apply to both local and remote setpoint
values.
Function FCODE
Option No Default Selected
Value
Value
Setpoint
106 Disabled
0 0
Limits Enabled 1
Function
Parameters
FCODE Range Unit Increment Default Selected
ValW V&K2
Setpoint Low limit
9 MEJS.
a”Y
1 digit Min
Limits High limit 10 Range
a”Y
1 digit Max
tJM6.1:DPR900:9102
Change 1 -September 1991
Page 87
[FsnEk;]
Configuration
5-33
5.7.8
Setpoint Ramp and Hold
May 1991
Changing the SP limits also changes the O-100
percent scales used by the SP and PV bargraphs
to that of the setpoint limits: 0 percent = lower limit
and 100 percent = upper limit.
When setpoint limiting is used, and the user elects
to retransmit the SP signal out on A02, the
transmitted signal will be the resealed O-l 00%
signal.
Setpoint ramping may be required for slow starting systems, such as
a steam system that requires warming up. The user selects initial
setpoint ramping options via FCODE 109. The controller may ramp
either the remote or the local setpoint value and can be configured to
indicate Ramp Status with DO3 and D04.
Function FCODE
Option No Default Selected
VZllW V&e
Setpoint
109 Disabled 0 0
Ramping
Enabled,
output on
DO>DO4 1
Enabled, no indicated
output
2
When ramping is configured, the ramp speed and ramping time period
must be set via FCODE 13 and 14.
Function Paramefers
Setpoint Ramping rate
Ramping Ramping timer
FCODE Range Unit Increment Default Selected
Vak V&.K3
13 Mt?k?S. Min. 1 digit Max
14
O-999
Min. 1 digit 1 Min
The controller determines the ramp direction (up or down) depending
on whether the setpoint value lies above or below the current process
value. The ramp starts when the controller is switched from manual to
auto. This switching can be manual or done via the control signal at
Dll or Dl2.
The following shows an example of the controller ramping function.
UM6.1 :DPf?900:9102
Page 88
5-34
Configuration
(FISnER;
I
I
I
0%
Manual 1
Auto
AU10
t Time
t0 t1
k! DPR900433
The heating time is 7 hours (420 minutes) and:
n
The measuring range is -50 to 600 degrees C,
n
The current process value is 90 degrees C
H The final setpoint value is 300 degrees C.
The process must heat to 210 degrees C in 420 minutes, giving a
ramp of 0.50 degrees C/minute. The figure shows the heating time
between to and tl.
At to the setpoint value equals the process value. The controller
ramping algorithm moves the setpoint value at a constant speed to
the preset value during to to tl. The PID parameters are not
influenced by the ramp speed, and the actual value follows the
changing setpoint value throughout the ramping.
The ramp starts when the controller switches from manual to auto, to,
When the controller is switched to auto, the setpoint ramping starts at
the present process value, moving at the preset speed towards the
final setpoint.
DO3 and DO4 indicate the ramp status when FCODE 109 is set to 1.
DO3 is active during ramping, from to to t,. DO4 is active at tz,
indicating that the configured time period is elapsed.
While the ramp is in control, the digital display shows the
instantaneous value of either the process value or the setpoint,
depending on the configuration. The final setpoint value displays as a
brighter bar on the bargraph and the PV and SP bargraphs also show
the instantaneous values.
To alter the setpoint value while the ramp is active, switch the
controller to manual mode. Insert the new setpoint value and restart
the ramp with the new parameters.
lJM6.1:LlPR900:9147
Change 2 -July 1992
Page 89
[Kiiq
Configuratron
5-35
5.7.9
Min/Max RSP Selection
5.0
The setpoint value limit FCODE 106 can be used to include the area
of most interest in the bargraph range. If further indications are
required as certain levels are passed, the process value alarms can
be used, provided the digital outputs have not been assigned
previously.
The Min/Max selector function is used to select one of the two RSP
values connected on A12 and Al3. The selected signal will then be
used as the RSP signal. The Min/Max comparison is made after any
signal processing that may have been applied.
Al2
Signal
Processing
FCODE 116
Max I Min
Al3
RSP
The RSP Min/Max function (FCODE 108) can only be used for the PV
or
the RSP by excluding the use of the PV monitoring function
Function FCODE Option NO
PV
Monitoring.
PVIRSP
Vallle
Selection
a
R
Note
The MinlMax functions for PV and RSP and the
PV monitoring functions are mutually exclusive
and cannot be combined.
Analog Output Signal Handling
This section describes the controller functions the user may select to
apply to the analog output signals A01 and A02.
May 1991
Page 90
5-36
Configuration
@iiF==
5.8.1
5.8.2
5.8.3
c+
4
Note
Manual control of output signals is only possible
when the M button and the manual mode increase
/decrease buttons are active (yellow LED’s lit).
When only the M button is lit, the controller has
been forced to the manual mode externally, i.e.
with discrete switching signals or through the
RS-485 communications link.
Manual Output Signal Control (AOI)
Press the M button to select the manual mode. The yellow LED’s in
the M button and the increase/decrease buttons light to indicate
Manual mode. The user can then change the output signal in 0.5
percent increments, using the yellow increase/decrease buttons.
To return to the Auto mode, simply press the M button again. The
yellow LED goes out, indicating Auto mode.
Output Signal Limiting (AOl)
To
prevent output signals on A01 from exceeding specified limits, set
upper and lower output signal limits, using FCODE 7 and 8. Select
output signal limiting using Fcode 105. Output signal limiting does not
apply to raise/lower outputs.
Function Parameters
FCODE Range Unit Increment Default Selected
Vallle
V&e
Output
Lower limit 7 0-i 00 % 0
Signal
Upper limit 8 O-100 %
Limits
Pl)
~,
Signal limits apply m Auto only 2
Forced Output Control (AOl)
With the exception of the raise/lower (positioning motor) outputs, the
controller’s output signal A01 may be forced to a preset value by a
discrete input at Dll or Dl2.
Enable or disable the forced control function via FCODE 112.
UM6. i:DPR900:9102
May 1991
Page 91
Configuratron
5-37
5.8.4 Feedfotward Control (AOI)
Function FCODE Option No Default Selected
VakZ W?.lUG!
Forced 112 Disabled 0 0
Output Dll, applies in Auto/Manual 1
Control Dl2, applies in Auto/Manual 2
Dll, applies in Auto only
3
DIZ, applies in Auto only
4
Use FCODE 19 to set the
required output signal
A01 for forced
control in the range O-100 percent.
Function Parameters FCODE Range Unit Increment Default Selected
Value Value
Forced Output Signal 19 o-1 00 %. 1% 0
Control
(A01 )
If a three-state pulse output is used, actuator
position feedback is required.
The analog input signal at Al3 or Al4 can be amplified and added to
the output signal at A01 This function can be used to eliminate a
measurable incoming disturbance before it has time to influence the
process value.
The feedforward function sums the PID output signal with either Al3
or A14. To apply the feedforward function, select the optional
amplification of the analog signal at Al3 or Al4, and sum the amplified
signal with A01 , using FCODE 115.
May 1997
Page 92
5-38 Configuration
(CISHER”)
5.8.5
Function FCODE Option
NO
Default
Value
output 115
Disabled
0 0
Signal Feedforward enabled, Al3
1
Processing
Feedforward enabled, Al4
2
Tracking, Output DI (Al4)
3
Tracking, Signal Selector (Al4)
4
Min selection enabled
5
Max selection enabled
6
Use FCODE 11 to set the amplification in the range of 0 to + 9.99.
Function Parameters
FCODE Range Unit
Increment Default Selected
Value Value
Feedfor- Gain 11
Sk999 - 0.1
0
ward
Output Signal Tracking
There are two types of output tracking functions selectable with the
DPRSOO controller using FCODE 115. While both functions deal with
the output signal to the final control device, one option is discretely
selectable through Dll while the other option is High/Low Signal
selectable.
Option 3: “Output Tracking”
Discrete
Switching+
Signal
Option 4: “Signal Selection”
T
P
DPRSOO
0
Remote
Analog __I
output
Signal
Change 1 -September 1991
Page 93
Confiauration
5-38A
Change 1 -September 1991
Tracking Signal Selector (Option 3)
Output tracking option 3 is used when the controller is configured
to
be used as a remotely controlled output tracking controller. This
occurs when a second signal received at Al4 is to be passed directly
through the DPRSOO and used as the output signal to the final control
device. As illustrated, when the discrete input signal is active, the
controller takes the analog signal at Al4 and retransmits it directly
through analog output A01 to the control valve. With this selection
active, internal output signal tracking is automatically achieved for the
internal loop.
Option 3 should be selected when a remote analog signal is to be
retransmitted through the controller to the final control device based
on a discrete switching signal. The controller’s output signal can be
made to track a given analog input signal connected to Al4, providing
output tracking when the discrete is active.
When output tracking is enabled, the output signal at A01 = (A14 +
delta U). Delta U is defined as the contribution from the controller
during regulation (max f 10%).
The user selects this function with FCODE 115, Option 3. The
controller will track only when the controller is in the AUTO mode and
the discrete input at DII is active. If the controller is in the MANUAL
mode, the discrete input has no effect on the controller switching
action and the controller remains manually adjustable.
The output tracking function cannot be used with positioning motor
(raise/lower) pulse outputs,
Tracking; Sigh S&to; (Al4) 4
Min selection enabled 5
Max selection enabled 6
UM6.1:DPR900’9102
Page 94
5-388
Configuration
(FISHER]
5.8.5.2
Tracking Signal Selector (Option 4)
Option 4 should be selected when twp DPRSOO controllers are used
and the high (or low) analog output signal between the controllers is
selected for use with the final control device by the second DPR
controller.
Option 4 is used only in the controller supplying its output signal to
another DPR controller and used with the second controllers Mm/Max
signal selection (FCODE 115, Option 5 or 6). Option 4 allows for
automatic integral output tracking between the two controllers,
utilizing the analog input signal connected at Al4. This signal must be
the output signal selected for transmission to the final control device.
Function FCODE Option
No Default Selected
Value Value
output 115 Disabled 0 0
Signal Feedforward enabled, Al3
1
Processing Feedforward enabled, Al4 2
Tracking, Output DI (Al4) 3
Tracking. Signal Selector (Al4) 4
Min selection enabled
5
Max selection enabled 6
This output tracking function cannot be used with positioning motor
(raise/lower) outputs.
Function FCODE
Option NO Default
Selected
Value ValW
EXtlXflal 110
Disabled
0
0
A/M Track AuWManualTTrackswitchingvia Dll 1
Switching
AutoIManual~rack switching via Dl2 2
5.8.6 Output Min/Max Signal Selector (AOl)
The output min/max function lets the output signal be controller by
either Al4 or the controller-calculated AU (delta U) value. AU is
calculated as A01 + AU. AU is the contribution from the controller
during regulation (max + 10%).
The minlmax selection is only active in the auto mode. Additionally,
the function cannot be used in conjunction with positioning motor
(raise/lower) pulse outputs.
UM6.1:DPR900:9102
Change 1 -September 1991
Page 95
(FISHER")
configuratron 5-39
5.8.6.1
5.8.7
Function FCODE Option
NO Default Selected
Vallle V&B?
Output
115 Disabled 0 0
Signal
Feedforward enabled, Al3 1
Processing Feedforward enabled, A14 2
Tracking. Output DI (Al4) 3
Tracking, Signal Selector (Al4) 4
Min selection enabled 5
Max selection enabled 6
Output Signal Display
The displayed output signal may be reversed (i.e. O-100% actually
displayed as 1000%). This may be useful when the operator is
familiar with an increase to close situation (reverse acting) and the
displays associated with such a loop. Use FCODE 134 to select the
values displayed as 0-i 00% or 10&O%.
Reversing the output signal display affects only the
display. The up and down arrow keys and all other
control functions remain unchanged.
Function FCODE
Option No Default Selected
Value Value
Output 134
O-l 00% 1
1
Signal 100-o% 2
Display
External Setpoint Output (A02)
The user may configure the controller to send the active setpoint
value, whether remote, local or computer controlled, out on analog
output 2 (A02) using FCODE 114. Option 2 refers to the actual active
setpoint value of the control loop. Option 3 always refers to the local
setpoint value regardless of the configuration. The remote setpoint at
Al2 can also be retransmitted to A02 after signal processing (i.e.
filtering, square-root extraction, and arithmetic handling).
Change 2 -July 1992
uM6.1:DPFf900:9147
Page 96
FCODE
114
Option
No Default Selected
V&It? V&K?
Disabled 0
0
Process value 1
Active setpoint 2
Local setpoint 3
Calculated Remote setpoint 4
Internal output signal 5
Q
&
Note
The controller self-test generates an error (E103) if
FCODE 114 is other than 0 and A02 terminals (11
and 12) are open.
Set FCODE 124 to select the A02 output signal range.
Function FCODE
Option
No Default Selected
Value Value
I
1
I
I
I I
Signal
124 G20mA 1
Range &20mA 2 2
A02
Q
4
Note
If the controller is using a remote setpoint value
and FCODE 140 is configured for Option 1 (the
extra internal setpoint value does not track the
remote setpoint value), then the extra internal
setpoint may be sent out on A02 by selecting
FCODE 114, Option 2.
Q
4
Note
The A01 output signal represents the actual
bargraph value (O-100%). If setpoint value
limiting (FCODE 106) is enabled, the output signal
is resealed to represent 0-i 00% of the limited
output or SP span, not necessarily the full SP or
PV potential.
Change 1 -September 1991
Page 97
Confiouration
5-4 1
Start-Up and Fatal Fault Values
Select an output signal value for the controller to use at startup and
/or configure the controller to hold the current output signal level, or
go to a preset signal level in case of a fatal fault during continuous
self-testing.
Use FCODE 20 to set the initial output signal start-up value for A01 in
the range O-100 percent. The value must be within the output signal
limits if any are configured.
Function Parameters FCODE Range
Unit Increment Default Selected
V.he ValUe
StXf output
Signal 20 o-1 00 % 1% 0
Value
(A01 )
Use FCODE 113 to select the start value option the controller uses
when it detects a fatal controller error.
Function
FCODE Option
NO Default Selected
Value WW
COlltlOllf3 113 Freeze output, at current level 1 1
Fault set OutDut level to preset value 2
Use FCODE 21 to set the preset failure output signal level for A01 in
the range O-100 percent to be used in the event of a fatal controller
error as selected with FCODE 113, Option 2.
Function Parameters FCODE Range
Unit Increment Default Selected
Value Value
Controller Output signal (AOl) 21
o-100 % 1 % 0
Fault
These functions are not applicable for positioning
motor (raise/lower) outputs.
5.9
Computer Control
The following covers controller communications with a supervisory
system and external control of either the setpoint or the output signal.
FCODE 117 determines the data communications configuration of the
controller.
May 1991
UM6.l:DPR900:9102
Page 98
5-42
Configuration
IFISHER”)
5.9.1
5.9.2
Function FCODE
Option No Default Selected
ValW? Value
Data 117 Disabled
0
0
Commu-
Not Used 1
nications Output signal control
2
Remote setpoint control 3
COMLI RS-485 protocol 4
When the user configures any of the other options (l-4) the red C light
comes on. Press the R button to activate or disable the data
communications function. The data communication mode is active
only when the R button is lit. Discrete output DO2 is activated as soon
as the controller is in the remote mode.
Remote Output Signal Control (DDC)
FCODE 117, Option 2 is remote output signal control. Two 24V
discrete input signals, Dl3 and Dl4, provide remote output signal
control provided the controller is in the Remote mode, the R button
LED is lit. Activation of Dl3 decreases and D14 increases the output
signal. If both signals are active no change occurs in the output
signal. Choose options from the following FCODE’s.
Use FCODE 33 to set the maximum ON time of the discrete inputs, in
the range l-999 seconds. This is further defined as the time it takes to
move the output from 0 to 100% or 100 to 0%.
Function
Parameters FCODE Range Unit Increment Default Selected
Value Value
DDC Time for O-100%
33 l-999 s 1s 100s
Running change
Time
The DII or Dl2 discrete input signal lines can switch the controller
mode from remote to local (but not from local to remote). Configure
this capability by setting the appropriate value with FCODE 111.
Function FCODE
Option No Default Selected
Value Value
EXtWlal 111
Disabled
0 0
R/L Remote/Local switching via DIl 1
Switching
Remote/Local switching via Dl2 2
Remote Setpoint Control (SPC)
FCODE 117, Option 3, selects remote setpoint (supervisory) control.
Remote control of the setpoint is then possible via activation of
discrete inputs D13 and Dl4. A 24 V signal on D13 decreases the
setpoint value and a 24 V signal on D14 increase the setpoint value. If
both inputs are active simultaneously, the setpoint does not change.
lJM6.1:DPR900:9102
May 7997
Page 99
[FISHER”)
Configuration
5-43
FCODE 33 sets the maximum running time for the controller to
change the setpoint from 0 to 100% (or 100 to 0%). Choose options
from the following FCODE’s:
1 Function 1 Parameters
1 FCODE 1 Ranw i Unit 1 Increment
1 Default 1 Selected 1
Value V&e
DDC Time for 0 to 100%
33
1-99s s
1s
100s
Running
Time
Function FCODE Option
No Default Selected
ValUe VailJe
EXtWlal 111
Disabled 0 0
WL Remote/Local switching via Dll 1
Switching
Remote/Local switching via Dl2 2
5.9.3 COMLI
Function FCODE Option
NO Default Selected
Wile Value
Setpoint 141 Extra internal setpoint 1 1
Computer External remote setpoint
2
Control
Function FCODE Option
No Default Selected
Value Value
Automatic 142
Disabled 1 1
Setpoint Switches to remote setpoint
2
Switching
Switches to extra internal s&point 3
External switching to local mode via Dll and D12 is still possible
(switching to remote from local is not possible). As in any data
communications mode, control of the setpoint value is only available
by activating the R button, otherwise the controller remains in local
control mode.
COMLI is the communication protocol that defines how information
held within the controller resident registers can be sent to a computer.
This is called the RS-465 communications link. A full description of the
COMLI protocol and its application in communicating with the
DPRSOO controller are contained in a separate manual, UM6.1:
DPR-COMLI, available from you Fisher Representative. When the
user selects Option 4 of FCODE 117, COMLI communications, they
must enter the COMLI address for the controller in FCODE 46. No
two controller’s on the same link can have identical addresses.
1 Function lParameters 1 FCODE IRan& 1 Unit I Increment I De&It 1%;~ I
I
I
I
I
COMLI Controller’s
46
l-255 1
ID Highway Address
May 1991
Page 100
5-44
Configuration
[ FISHEFJ
Autotuner
5.10.1
The Autotuner is a selectable function that enables automatic setting
of the controller PID parameters based on actual process control
dynamics. When Autotuning is used in conjunction with the Gain
Scheduling function, Autotuning of non-linear processes is also
possible. Paragraph 5.11 describes the Gain Scheduling function.
Principle of Operation
Autotuning uses a relay type function with hysteresis, initiating a
controlled oscillation in the process. When the TUNE button is
pressed the autotuning procedure is started by inserting a step in the
output signal so that the process value begins to diverge from the
setpoint. Because the relay function is controlling the process during
autotuning, self-oscillation is induced, so that the output signal
alternately exceeds and falls below the onglnal value by a defined
amplitude. The Autotuner itself adjusts this amplitude so that the
process value will not be greater than a level which is necessary for
the process response to be isolated from process and measuring
noise (the oscillation amplitude is roughly comparable to the process
noise level).
By measuring the process response the Autotuner can identify the
process dynamic characteristics during autotuning. When the
parameters are considered reliable, the autotuning process stops.
New PID parameters are calculated and stored in the controller,
The autotuning function has certain similarities to the manual Ziegler
Nichols method. On the other hand, the Autotuner has control over
the process oscillation amplitude which results in considerably less
disturbance to the process.
Tuning Process Example:
lJM6.1:DPR900:9102 May 1991
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