Omega C9000A SERIES User manual

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C9000A SERIES
Autotune Temperature Controller
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User’s Guide

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i
TABLE OF CONTENTS
CN9000A SERIES
MINIATURE AUTOTUNE TEMPERATURE
CONTROLLER
SECTION
SECTION 1 INTRODUCTION..............................
1.1 General Description......................................
1.2 Available Models..........................................
SECTION 2 INSTALLATION...............................
2.1 Unpacking.....................................................
2.2 Cautions and Mounting Instructions.............
2.3 Wiring...........................................................
2.4 Typical Wiring Diagrams...............................
SECTION 3 OPERATION......................................
3.1 General Considerations................................
3.2 Controls and Indicators................................
3.3 Default (Pre-Set) Settings............................
3.4 Getting Started.............................................
3.4.1 Selecting Sensor and Adjusting Setpoint.....
3.4.2 Changing the Allowable Setpoint Default
Range (Function .24).................................
3.5 Parameter Adjustments (Standard
Functions)...................................................
3.5.1 Keying in Standard Functions......................
3.5.1.1 Example of Programming Functions
.0, .1, .2, .3- .23..........................................
3.5.1.2 Example of Programming Functions
.19 & .2 (SP2)...........................................
3.5.1.3 Example of Programming Functions
.24 and Special Case of Function .2.........
3.5.1.4 Details of Standard Function .0- .25............
Table 3-4, Standard Functions.0- .25........
3.6 Examples of Parameter Adjustments...........
3.6.1 Changing SP1 Proportioning Time
(Function.4)...............................................
PAGE
1
1
2
5
5
5
7
9
11
11
11
14
14
14
16
18
18
19
20
21
22
23
34
34

ii
TABLE OF CONTENTS (Cont'd)
SECTION
3.7 Negative Temperature Ranging..................
3.8 Manual Mode (Auto/Manual) Function .0
Option 4- 100)...........................................
3.9 Park Mode...................................................
3.10 Linear Process Inputs.................................
3.11 Second Output Operation...........................
3.12 Details of Advanced Functions .26- .50......
Table 3-6, Advanced Functions .26- .50...
3.13 Parameter Lock...........................................
SECTION 4 DIAGNOSTICS................................
4.1 Fault Indication............................................
4.2 Loop Break Alarm.......................................
4.3 Operational Diagnostics..............................
4.3.1 Diagnostics (Functions .38- .49).................
4.3.2 Duty Cycle Monitor (DCM) (Function .42)..
4.3.3 Autotune Tuning Data
(Functions .43- .49)..................................
SECTION 5 TUNING............................................
5.1 Autotune......................................................
5.1.1 Autotune AT.................................................
5.1.2 Using Autotune AT.......................................
5.1.3 Autotune PT (Push-to-Tune)
Function .0 Option 2.................................
5.1.4 To Abort Autotune.......................................
5.1.5 Over-riding Autotune Values.......................
5.1.6 Autotune Hints............................................
5.1.7 Autotune Value Display...............................
5.1.8 Proportional Cycle Time..............................
5.2 Manual Tuning............................................
5.2.1 The Simplified Method................................
5.2.2 Alternative Tuning Method..........................
PAGE
36
36
36
36
37
38
39
44
45
45
46
47
47
48
48
49
49
49
50
51
52
52
52
53
54
57
57
58

iii
TABLE OF CONTENTS (Cont'd)
SECTION
5.3 Proportioning Time......................................
5.4 Proportional Band.......................................
5.5 Integral (Reset) Time..................................
5.6 Derivative (Rate) Time................................
5.7 Derivative Approach Control.......................
5.8 Heating and Cooling...................................
5.8.1 General Considerations..............................
5.8.2 Cool Strategy for Heat-Cool Applications...
5.8.3 Setting Up Routine for Heat-Cool Control..
SECTION 6 CALIBRATION................................
6.1 Display Offset..............................................
6.2 Recalibrating to a Remote Standard..........
6.2.1 Sensor Error Correction (Function .9)........
6.2.2 Sensor Span Adjust (Function .35).............
SECTION 7 115/230 VAC AND 2-WIRE/
3-WIRE RTD CONVERSIONS..............
7.1 To Remove Main PC Board........................
7.2 115/230 VAC Voltage Conversion...............
7.3 2-Wire/3-Wire RTD Conversion..................
7.4 Installing the Triac, 4-20mA and 0-10 VDC
Output Options..........................................
SECTION 8 SPECIFICATIONS..........................
APPENDIX A: Function Quick Reference
Guide...........................................
APPENDIX B: Quick Start Up Instructions
PAGE
61
62
62
63
63
64
64
64
65
67
67
67
67
68
71
71
72
73
73
75
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82

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iv.

1
SECTION 1 INTRODUCTION
1.1 GENERAL DESCRIPTION
The OMEGA®CN9000A Series Miniature Autotune
Microprocessor Controllers are designed for accurate, precise
temperature control. They feature high accuracy and reliability, as
well as sophisticated PID or Autotune PID with approach control
(PDPI) for optimal control during start-up and steady-state
operation.
The CN9000A controllers feature models with user selectable
inputs from nine thermocouple types or 2-wire RTD, or models
with 3-wire RTD input. These units are °C/°F switchable, offer a
0.1° resolution up to 200°, and the second setpoint and output are
standard. The controller can also be programmed to accept linear
voltage signals up to 20 mV.
The CN9000A features advanced PDPI control, which enables the
unit to suppress overshoot, and allows the process warm-up to be
tuned independently from the steadystate operating conditions. For
other processes, a user may select PiD (Proportional-Integral-
Derivative), PD (Proportional-Derivative). Proportional, or On/Off
control.
The CN9000A controllers are well suited to a broad range of
applications, and are easy to install and operate. For most
applications, the user need only select the desired input type by
using the front pushbuttons. The CN9000A is ‘pre-set’ for control
parameters which are suitable for most applications. These pre-set
(or default) parameters can be changed by the operator at any
time, in order to fine-tune the controller to an individual process.
The controller can easily be used in the Autotune Mode, allowing
the microprocessor to attempt to calculate the optimum PID
parameters.
Selection of all operational controls is made through the three keys
on the front panel of the CN9000A, with the display prompting the
user for each step. After the parameters have been set, they can
be 'locked-in' by removing the jumper located under the front
bezel. The user may select the control mode and parameters, the
display resolution (1° or 0.1°) and the units (°C/°F). The user may
also utilize the ranging feature of the instrument, which limits the
range in which a setpoint may be chosen, or lock-out an operator
from changing the setpoint.

2
The second setpoint (or output) of the CN9000A may have
proportional or on/off control. The second setpoint is set as a
deviation from the primary setpoint. Cycle time, proportional band
and on/off deadband are all set independently of the primary
setpoint (SP1).
The CN9000A display has a large 31 /2digit green LED readout,
with auxiliary indicators for output 1 and output 2, and three LEDs
to indicate deviation from setpoint. The microprocessor, in addition
to automatic processing of key calculations, holds the data in non-
volatile memory-with the ability to retain data for up to 10 years
with no power.
Refer to Figure 1-1 and Table 1-1 for the CN9000A model number
information.
Refer to Figure 1-2 and Table 1-2 for the plug-in replacement
output board and socket model number information for the
CN9000A.
*SSD output is a Solid State Driver (5 Volt DC Pulse) designed to
be used with a DC controlled solid state relay such as OMEGA's
model number SSR240DC45 relay.
Figure 1-1. CN9000A Model Number Information
1.2 AVAILABLE MODELS
CODES for the Input Sensor
1Thermocouple
2-Wire RTD, or
Linear Millivolt Signal
23-Wire RTD
CODES for Output
No. 2
13A Mechanical
Relay
25VDC SSD*
CODES for Output No. 1
15A Mechanical Relay
25VDC SSD*
31A Triac SSR
44-20 mA DC
50-10 VDC
A
CN9

3
TABLE 1-1
CN9000A MODEL NUMBER DETAILS
MODEL INPUT OUTPUT 1 OUTPUT 2
CN9111A Relay Relay
CN9112A Relay 5VDC SSD*
CN9121A 5VDC SSD* Relay
CN9122A 5VDC SSD* 5VDC SSD*
CN9131A 1 A Triac Relay
CN9141A 4-20 mA Relay
CN9151A 0-10 VDC Relay
CN9211A Relay Relay
CN9212A Relay 5VDC SSD*
CN9221A 5VDC SSD* Relay
CN9222A 5VDC SSD* 5VDC SSD*
CN9231A 1 A Triac Relay
CN9241A 4-20 mA Relay
CN9251A 0-10 VDC Relay
For 230 VAC, add "-230VAC" at the end of the part number.
*SSD output is a Solid State Driver (5 Volt DC Pulse) designed to
be used with a DC controlled solid state relay.
Thermocouple
2-Wire RTD
Linear Millivolt
Signal
3-Wire RTD

4
Figure 1-2. CN9000A Series Replacement Output Board
Numbering Information
TABLE 1-2
CN9000A REPLACEMENT OUTPUT BOARD DETAILS
MODEL OUTPUT 1 OUTPUT 2
BD9011A Relay Relay
BD9021A 5VDC SSD Relay
BD9012A Relay 5VDC SSD
BD9022A 5VDC SSD 5VDC SSD
BD9031A* 1 Amp Triac SSR Relay
BD9041A*† 4-20 mA DC Relay
BD9051A*† 0-10 VDC Relay
*Requires that BD9021A is already installed in the controller.
†For 230 VAC models, add "-230VAC" to the part number
CODE Output No. 2
1 3A Mech Relay
2 5VDC SSD
CODES for Output No. 1
1 5A Mechanical Relay
2 5VDC Solid State Driver (Pulse)
3 1A Triac SSR
4 4-20 mA DC
5 0-10 VDC
BD90 A

5
Remove the Packing List and verify that you have received all
equipment. If there are any questions about the shipment, please
call the OMEGA Customer Service Department at 1-800-622-2378
or [phone].
Upon receipt of shipment, inspect the container and equipment for
any signs of damage. Note any evidence of rough handling in
transit. Immediately report any damage to the shipping agent.
NOTE
The carrier will not honor any claims unless all shipping
material is saved for their examination. After examining and
removing contents, save packing material in the event
reshipment is necessary.
READ THESE CAUTIONS BEFORE YOU INSTALL,
OPERATE, OR SERVICE YOUR CN9000A
For safe use apply good engineering practices applicable to all
products of this type.
1. Install in a grounded metal enclosure, prevent live parts from
being touched and ground sensor sheaths to avoid possible
shock hazard.
2. Wire according to the information in this manual and conform
with the appropriate standards and regulations.
Output number 2 should not be used as an alarm in a safety circuit
where damage or personal injury may be caused by equipment
failure. A separate unit should be used, instead.
SECTION 2 INSTALLATION
2.2 CAUTIONS AND MOUNTING INSTRUCTIONS
INSTALLATION CAUTIONS
ALARM CAUTION
2.1 UNPACKING
CAUTION

6
The controller functions are user selectable. It is therefore the
user's responsibility to ensure that the controller configuration
corresponds to the factory's requirements and is safe. Remove the
parameter lock jumper to restrict tampering after configuration.
The CN9000A is mounted in a panel through a 1.772" (45 mm)
square 1/16 DIN 43700 cutout using the speciai mounting clip
provided (refer to Figure 2-1).
To install the CN9000A, remove the rear socket by pressing the
lock buttons. Slide the controller into the panel cutout from the
front. Slide the mounting clip back onto the controller from the rear.
Press to home position until the clip holds the unit firmly in place. If
necessary, the mounting can be further tightened using the jacking
screws. Plug the rear socket back into place on the controller.
To remove the controller from the panel, pull the legs of the
mounting clips away from the controller case to release the
ratchet.
The minimum spacing for mounting several controllers is shown in
Figure 2-2.
CONFIGURATION CAUTION
MOUNTING INSTRUCTIONS
*To unplug socket, press in lock buttons and pull apart
Figure 2-1. Controller Mounting and Panel
Cutout Dimensions

7
Figure 2-2. Mounting Multiple Units
The CN9000A operates on either 115VAC ±15%, 50/60 Hz (std)
or 230VAC ±15%, 50/60 Hz (selectable by changing internal
jumpers-discussed in Section 7). The CN9000A outputs feature
either the standard mechanical relay or the optional non-isolated
5VDC Solid State Driver pulse output (designed for operating an
external DC SSR such as an OMEGA SSR240DC45). Three other
optional outputs are available using a plug-in replacement
combination socket. These outputs are a 1A Triac SSR, 0 to
10VDC, or a 4 to 20 mA DC output. They are described in
Table 1-2.
Figure 2-3 shows the rear view of the controller and designates
which signals connect to the terminals. The chart directly following
Figure 2-3 details the actual connections.
NOTE
When mounting multiple units
allow 3-1/2 inches from center to
center of the unit in the vertical
direction to allow for mounting
bracket and wiring, and 2 inches
in the horizontal direction for heat
dissipation.
3-1 /2" Min
2" Min
1.772” square
Cut-out (typ)
2.3 WIRING

8
Figure 2-3. CN9000A, Rear View, Signal Connection
Designations
TERMINAL DESIGNATIONS AND SIGNAL CONNECTIONS
1AC Power, 115 VAC 50/60 Hz (230 VAC, optional)
2AC Power, Neutral
3RTD (black, if 3-wire RTD) (For T/C, do not use terminal.)
4Thermocouple (-); or RTD (black if 3-wire RTD); or Neg.
Voltage
5Thermocouple (+); or RTD (red, if 3-wire RTD); or Pos.
Voltage
6Output 2 (SP2) Mechanical Relay Normally Open (N.O.)
7Output 2 (SP2) Mechanical Relay Common (C.) or 5V Pulse (-)
8Output 2 (SP2) Mechanical Relay Normally Closed (N.C.);
or 5V Pulse (+)
9Output 1 (SP1) Mech Relay N.O.; 1 A SSR N.O.; 5V Pulse
(-); 0-10V (-); or 4-20 mA (-)
10 Output 1 (SP1) Mech Relay C.; 1A SSR C; 5V Pulse (+);
0-10 V (+); or 4-20 mA (+)
11 Output 1 (SP1) Mech Relay N.C.; or 1A SSR N.C.
Check side label on controller for supply voltage before wiring.
Your choice of thermocouple types J, K, T, E, R, S, N, B,
J DIN, and the Pt100 2-wire RTD inputs are selectable via the keys
on the CN91XXA version of the controller. The CN92XXA controller
is configured to accept a 3-wire RTD input only. Figure 2-4 shows
how to wire any of these sensor inputs to the controller.
91011 12
N.O. C. N.C. L N
-+ OV
+-
N.C. C. N.O. + -
876543
(Output 1) (Power)
(Output 2) (Input Signal)
1 A SSR, MECHANICAL RELAY
0-10V, 4-20 mA, SSD (PULSE)
SSD (PULSE)
MECHANICAL RELAY
CAUTION

9
Figure 2-4. Thermocouple and RTD Input Wiring
Figures 2-5 and 2-6 illustrate typical wiring of the CN9000A
Controllers. (Standard controllers operate on 115VAC 50/60Hz.
230VAC operation is optional.)
Connections for
Thermocouple
Connections for
2-wire Pt 100/RTD Connections for
3-wire Pt 100/RTD
2.4 TYPICAL WIRING DIAGRAMS
Figure 2-5. Wiring Heater with Alarms
(Two Mechanical Relays-Model CN9111A)
LOW ALARM OR WITHIN LIMITS SIGNAL
HIGH ALARM OR OUT OF LIMITS SIGNAL
ALARM
SIGNAL
SUPPLY
LOAD
5A (max
115V±15% 50-60 Hz
N
L

10
Figure 2-6. Heating and Cooling CN9121A [One DC Solid
State Relay Driver for Heating (SP1), 3A Mechanical Relay
for Cooling (SP2)]
Figure 2-7. Wiring of single output controller
CN9110A, CN9210A
NOTE
The CN9000A Series has been designed to be as immune as
possible to electrical interference. However, electrical noise
suppression may be required in some applications, particularly if
the output of the controller is firing a contactor or coil. A noise
suppression kit is available for use with 115VAC, OMEGA part
no. 1821-101 (consists of an RC network or metal oxide varistor
(MOV)).
TYPICAL WIRING FAST BLOW FUSE
LN
COOLING WATER
3A (max)
SOLENOID
VALVE
LOAD
SSR output SP1
DC
INPUT
SSR

11
The CN9000A is pre-set for control parameters that are suitable for
many applications. The CN9000A can be operated with the default
(pre-set) settings, or the default settings can be overridden by
more appropriate control modes and parameters and/or enabling
of the second setpoint, by programming the CN9000A through the
front panel keys. Refer to Table 3-1, Controls and Indicators and
Table 3-4, Standard Functions .0 through .25.
The CN9000A allows the user to use autotune rather than the
default settings. In the autotune mode, the controller will attempt to
select the optimum PID settings.
Figure 3-1 and Table 3-1 illustrate the controls and indicators of
the CN9000A Series Controller.
SECTION 3 OPERATION
3.1 GENERAL CONSIDERATIONS
3.2 CONTROLS AND INDICATORS
Figure 3-1. CN9000A Front Panel-Controls and
Indicators
1
2
3
4
5

12
1 LED Display
2 Deviation Indicators
ITEM CONTROL/INDICATOR FUNCTION
TABLE 3-1
CONTROLS AND INDICATORS
The four-digit display normally
shows process temperature to 1°C
or 1°F resolution (for example,
197°F). However, if the CN9000A is
set for a tenth degree resolution (up
to 200°), the display shows the
temperatures in 0.1°C or 0.1°F
increments (for example, 197.3°F).
The display also shows the setpoint
value (flashing) and the Function
and Option numbers when in the
Set-Up Mode. Functions are the
available controller facilities (e.g.,
Derivative); Options are the
available values for each Function
(e.g., Derivative value-50 seconds).
When in the Set-Up Mode,
remember that the Function
numbers are on the RIGHT and the
Option numbers are on the LEFT of
the floating decimal point.
These three LEDs display the
difference between set point and
process temperatures in five steps,
each one representing 2% of full
scale value.
Flashing >3% above setpoint
Steady 1%-3% above setpoint
Steady ±1% about setpoint
Steady 1%-3% below setpoint
Flashing >3% below setpoint
The error indicator can also be
used in high resolution (±1% steps)
or low resolution (±4% steps).

13
TABLE 3-1 (Cont'd)
All three Error Indicator LEDs are
on when unit is in Manual or Park
Mode.
This LED is illuminated (green)
when the SP1 output is ON.
This LED is illuminated (red) when
the SP2 output is ON or OFF,
depending on mode of operation.
Refer to Function .31 in Table 3-6
for more details.
NOTE: The Parameter lock jumper is located under the lower front
bezel (discussed in Section 3.13).
ITEM CONTROL/INDICATOR FUNCTION
3 SP1 Output Indicator
4 SP2 Output Indicator
5 Control Keys When pressed, displays the
SP1 temperature.
Pressed simultaneously
increases the SP1
temperature value.
Pressed simultaneously
decreases the SP1
temperature value.
Selects Set-Up Mode (entry
into the Function and
Option commands -refer to
Table 3-4). Display flashes,
normal temperature control
is maintained.
When in the Set-Up Mode,
increments the Function
and Option numbers up or
down.
When in Set-Up Mode,
changes the sub mode from
Functions to Options and
vice-versa.
★
★
★
P
or
★

14
For ease of use in normal applications, the CN9000A has been
pre-set with factory or Default settings (or Parameters). Section 3.5
discusses how to change these Default settings.
These pre-set Parameters enable the instrument to operate in the
PID Control Mode, with a single set point and slow cycle relay
output. This configuration should give good results where the
heater is adequately rated and the control sensor is located
reasonably close to it.
Default Settings (for SP1 only) are:
Proportional Time (Cycle Rate) = 20 seconds
Proportional Band (Gain) = 2.5% of Default full scale
Derivative Time (Rate) = 25 seconds
Integral Time (Reset) = 350 seconds
To use the controller with the Default settings requires only that the
correct Option number of the sensor. selected from Table 3-3,
Sensor Default Setpoint Range Table, be keyed into the
instrument. Also, check that the instrument is set to either °C or °F,
as required. (Refer to Function .22 in Table 3-4).
Also check that the desired control temperature is within
the Setpoint Default range. Refer to Section 3.4.2.
3.3 DEFAULT (PRE-SET) SETTINGS
3.4 GETTING STARTED
3.4.1 Selecting Sensor and Adjusting Setpoint
To operate unit:
Apply power. All LED segments will be briefly illuminated during
the self-check routine, then the display will request sensor
selection (from Table 3-3), i.e., the desired Option number for
Function .16, and will not respond to any further instructions until
this selection is made.