Omega CN9400 User Manual
®
User ’s Guide
http://www.omega.com
e-mail: info@omega.com
CN9400
Dual Display Autotune Temperature Controller
INDEX
SAFETY INFORMATION A1
FUNCTIONS MENU A3
QUICK START
Quick Start Set-up 1a
INTRODUCTION 2
The controllers 2
OVERVIEW 3
Installation 3
Set-up 3
Autotune 3
Cycle-time 4
SET-UP 5
Power-up 5
Select input sensor 5
Select display units 5
Allocate output device 5
Enter initial configuration 5
Set main setpoint 5
MENU NAVIGATION 6
Using program mode 6
AUTOTUNE 7
Tune program 7
Tune at setpoint program 8
PROPORTIONAL CYCLE-TIME 9
Cycle-time selection methods 9
Cycle-time recommendations 9
Autotune calculated cycle-time 9
PROGRAMMER 11
Ramp-Soak 11
SECOND SETPOINT (SP2) 12
SP2 as an alarm 12
SP2 subsidiary mode 13
SP2 as a proportional output 13
SP2 alarm condition table 13
SP2 alarm annunciator 13
ERROR MESSAGES 14
Recommendations 14
Autotune data in
IMPROVING CONTROL ACCURACY 15
Using
ChEK
FUNCTION LIST 16
Level 1 16
Level 2 18
Level 3 19
Level 4 21
OUTPUT OPTIONS 22
ADVANCED SETTINGS 23
Heat Cool strategy 23
Calibration to other instrument 24
Linear input calibration 25
MECHANICAL INSTALLATION 27
DIN panel cut-outs 27
Minimum spacing 27
Mounting 28
ELECTRICAL INSTALLATION 29
General requirements 29
Connection diagrams 30
INPUT/SENSOR SELECTION 31
SPECIFICATION 32
WARRANTY INFORMATION Inside back cover
tECH
accuracy monitor 15
14
Index
A2A1
SAFETY INFORMATION
INSTALLATION
Designed for use:
UL873 - only in products where the acceptability is determined by
Underwriters Laboratories Inc.
EN61010-1 / CSA 22.2 No 1010.1 - 92
To offer a minimum of Basic Insulation only.
Suitable for installation within Catagory II and III and Pollution
Degree 2.
SEE ELECTRICAL INSTALLATION P29 & P30
It is the responsibility of the installation engineer to ensure this
equipment is installed as specified in this manual and is in
compliance with appropriate wiring regulations.
CONFIGURATION
All functions are front selectable, it is the responsibility of the
installing engineer to ensure that the configuration is safe. Use the
program lock to protect critical functions from tampering.
ULTIMATE SAFETY ALARMS
Do not use SP2 as the sole alarm where personal injury or damage
may be caused by equipment failure.
Safety Information
FUNCTIONS MENU
nonE; LEV 3; LEV 2; ALL
LEVL 4
Security lock
LOCK
Disable program auto-exit
PROG NO.AL DIS.S DER.S
*
Auto; StAY
USER-PROTECTED SETTINGS
Off; on
Disable -AL- alarm display
Display averaging
*
dir; 1 to 32 (6)
0.1 to 1.0 x dEr.t (0.5)
Derivative sensitivity
Range of Adjustment shown in red under
description. If applicable, factory settings shown
in bold.
* Note: Dual Relay and Dual SSd Output Options
Models CN9411 and CN9422 have their outputs
pre-configured. (see page 22)
Setpoint 1
Output
indicator
(green)
Process temperature (PV) or Function (green)
Setpoint temperature (SP) or Option (orange)
Setpoint 2 Output indicator (red)
nonE; rlY; SSd
SP1 output device
LEVL 3
LEVL 2
Functions Menu
LEVL 1
Level C only visable
when COMMS
Option fitted
KEY ✱ ▼ OR ✱ ▲ TOGETHER TO CHANGE LEVELS OR OPTIONS
LEVL C
SP1.D
CONFIGURE OUTPUT SAFETY SETTINGS CALIBRATION PERFORMANCE DATA
0 to 100% read only
Read SP1 output %
SP1.P
oFF; on; tunE; ParK; At.Sp
Autotune or Park
TUNE
PROGRAM ENTRY
➔
0 to 255
Instrument address
ADDR
A3
nonE; SSd; rlY (read only)
SP2 output device
SP2.D BURN REU.D REU.L SPAN ZERO CHEK READ TECH UER RSET
0 to 100% proportional
SP1 manual output %
HAND PL.1 PL.2 SP2.A SP2.B DISP HI.SC LO.SC INPT UNIT
MANUAL ADJUSTMENTS SP2 MODES RANGING CONFIGURE INPUT
0.1 deg to 25% sensor f/s
SP1 Prop band (gain)/hyst
BAND INT.T DER.T DAC CYC.T OFST SP.LK SPRR SPRN SOAK SET.2 BND.2 CYC.2
1200: 2400: 4800:
Baud rate
BAUD DATA DBUG
COMMS SETTINGS
Sensor burn-out
mode only
Limit SP1 output %
(10°C/18°F)
Integral time (reset)
9600: 19k2
Data format
uP.SC; dn.SC; 1u.2d; 1d.2u
100 to 0%
Off; 0.1 to 60 min (5 min)
18n1:18E1:18O1
1r.2d; 1d.2d; 1r.2r; 1d.2r
Reverse outputs
100 to 0%
Limit SP2 output %
Off; 1 to 200 sec (25 sec)
Derivative time (rate)
SP1 SETTINGS
Off; on
Tx/Rx activity
1n.2n; 1i.2n; 1n.2i; 1i.2i
Reverse O/P LEDs
nonE; dV.hi; dV.Lo; bAnd;
FS.hi; FS,Lo; Cool
Main SP2 mode
0.5 to 5.0 x bAnd (1.5)
Derivative approach
0.0 to 25% sensor f/s
Span adjustment
nonE; LtCH; hold; Lt.ho;
nLin
Second SP2 mode
(20 sec)
On.off; 0.1 to 81 sec
Cycle time or on/off
sensor full scale
0.0 to 25%
Zero Adjustment
1 or 0.1 degree
Display resolution
(In.t = off)
0 to 50% x bAnd
Offset (manual reset)
Off; on
Set Monitor
sensor full scale
0.0 Sensor max to
Set scale maximum
Off; on
Setpoint lock (SP1)
Read Monitor
Set scale minimum
Setpoint Ramp rate
KEY ▼ ▲ TO VIEW FUNCTIONS
VAr; hi; lo deg
full scale
0.0 Sensor min to sensor
CtA; Ctb; Ct1; Ct2; Ct3;
Read Tune Data
nonE
Select input sensor
Ct4; oS1; uS; oS2
Consult unit
Software version
PSi; Ph; rh; SEt
nonE; °C; °F; bAr;
Select display units
RESET
nonE; ALL
➔
QUICK START ENTRY
0 to 9990 deg/hour
PROGRAMMER SETTINGS SP2 SETTINGS
On; off; hold
Ramp off/on
Off; 0 to 1440 min
Soak time
Adjust SP2 setpoint
full scale
+/– sensor full scale or
0.1 deg to 100% sensor
SP2 prop band/Gain/Hyst
f/s (2°C/3.6°F)
SP2 Cycle on/off
On.off; 0.1 to 81 sec
INSTRUMENT ADJUSTMENTS
To enter or exit program mode: Press ▲ ▼ together for 3 seconds
To scroll through functions: Press ▲ or ▼
To change levels or options: Press ✱ ▲ together or ✱ ▼ together
To view setpoint: Press ✱
To increase setpoint: Press ✱ ▲ together
To decrease setpoint: Press ✱ ▼ together
To reset an alarm or fault condition: Press ▲ ▼ together briefly
Notes: If in difficulty by becoming “lost” in program mode, press ▲ and ▼
together for 3 seconds to return to display mode, check the
INSTRUMENT ADJUSTMENTS above and try again.
When in program mode, after 60 seconds of key inactivity
the display will revert to either
or, if the initial configuration has been completed, the
measured value. Any settings already completed will be retained.
INPT
NONE
2 Select unit.
Press and hold ✱ and use the ▲ or ▼ buttons to scroll
through the unit selection list until the
correct unit is displayed. Release the
buttons.
The display will read selected unit e.g.
Press ▲ once The display will now read
3 Select SP1 (Main setpoint output device)
Note: Dual Relay and Dual SSd Output Options
Models CN9411 and CN9422 have their outputs
pre-configured. (see page 22)
Press and hold ✱ and use the ▲ or ▼ buttons to select
SSd
or
rLY
as required.
The controller will now read selected output device e.g.
Quick Start
QUICK START
1b
4 To enter initial configuration into
controller memory
Press and hold both ▲ and ▼ buttons for 3 seconds.
The upper display will now alternate
ParK
and measured variable (temperature)
(eg. 23)
ParK
is displayed because
a setpoint has not yet been entered as
shown by the lower display
To display setpoint
Press and hold ✱ The displays will now read
unit
(eg. °C) and
0
To enter setpoint
Press and hold ✱ and use ▲ button to increase or ▼
button to decrease the reading and
scroll to required setpoint value. (The
digit roll-over rate increases with time).
THE CONTROLLER IS NOW OPERATIONAL
WITH FACTORY SETTINGS
Note: For precise control of an application the controller
may need to be TUNED. Please study section
headed FUNCTIONS and OPTIONS before moving
to the section on AUTOTUNE.
UNIT
*C
SPI.D
NONE
SPI.D
SSD
PARK
0
*C
0
Introduction
INTRODUCTION
The CN9400 is a 1/16 DIN dual display, dual output miniature
controller with PID control strategy.
Control can be optimised with a single shot autotune either on
initial warm-up or at setpoint. The second setpoint can be
configured in a variety of alarm modes or PID Heat-Cool strategy. A
programmer offers a single ramp to setpoint with a choice of timed
soak period before switching off the output.
Control of non temperature processes is achieved by the provision
of linear input ranges and scaling in commonly used engineering
units.
Serial communication is available as an option, and the easy to use
CN9-SW is a graphic WINDOWS
TM
based software package designed
for PC supervision of up to 32 instruments, for remote adjustment,
configuration, cloning, saving and retrieving settings to files and
logging and charting in real time.
CN9-SW uses the MODBUS®protocol via either a fully isolated RS232
or RS485 link depending on the number of instruments and the
transmission distances involved in the application.
A users manual is supplied with the comms option. For more
information contact OMEGA. For details, see rear cover.
It is suggested that users read the OVERVIEW section of this manual
before any installation or setting-up procedures are undertaken.
Note: The controller will not be operational until either the
QUICK-START or SET-UP procedure has been completed.
NB: Please note that in program mode, functions
are shown in the upper display (green) and options
in the lower display (orange)
2
CN9400
TUNE
PARK
Overview
OVERVIEW
INSTALLATION
The Model CN9400 controller is designed to be mounted in a 1/16
DIN panel cut-out. See the INSTALLATION section.
SET-UP
After installation the controller requires programming with the
following information:
Type of Input Sensor
Operating unit (C or F etc)
Type of Output Device
Temperature Setpoint
Note: The controller will not be operational until this
information is entered.
When the above information has been programmed into the
controller it will be operational with the following factory PID
(proportional band, integral time, derivative time) settings.
Proportional band/Gain 10°C/18°F
Integral time/Reset 5 mins
Proportional cycle-time 20 secs
Derivative time/Rate 25 secs
DAC Derivative approach control 1.5
AUTOTUNE
To precisely control an application the controller will need to be
‘tuned’ using the built-in ‘AUTOTUNE’ feature. Autotune ‘teaches’
the controller the main characteristics of the process and ‘learns’ by
cycling the output on and off. The results are measured and used to
calculate optimum PID values which are automatically entered in the
controller memory.
During AUTOTUNE the optimum cycle-time is calculated but is not
automatically implemented. The cycle-time requires manual
acceptance unless pre-selected.
To ensure good control over a wide range of applications two
versions of the Autotune program are provided, TUNE and TUNE AT
SETPOINT.
The TUNE method normally achieves the best results. Starting with
the load cool, tuning occurs during warm-up preventing overshoot.
This method of tuning is recommended.
The TUNE AT SETPOINT method is used for specialist applications.
eg. Heat-cool, multizones and processes below 100°C/200°F. During
the tuning cycle some overshoot occurs because the tuning cycle is
at set point.
The DAC setting is not re-calculated.
3
Overview
CYCLE-TIME
The choice of cycle-time is influenced by the external switching
device or load. e.g. contactor, SSR, Valve. A setting that is too long
for the process will cause oscillation and a setting that is too short
will cause unnecessary wear to an electro-mechanical switching
device.
Cycle-time selection methods
The following methods of cycle-time selection may be used:
Autotune calculated
After Autotune has been run and completed the calculated cycletime can be manually accepted or adjusted to suit the switching
device. For selection method see Select Autotune Calculated
Cycle-time.
Pre-select autotune cycle-time
The controller can be programmed to automatically accept the
calculated Autotune cycle-time. For selection method see Pre-
Select Automatic Acceptance of Any Autotune Cycle-time.
Pre-select before autotune
The controller can be programmed manually with any cycle-time
between 0.1 and 81 sec. This cycle-time will not be changed by any
Autotune functions. For selection method see Pre-Select Cycletime Before Autotune.
Factory set
To use the 20 sec factory set cycle-time no action is needed
whether Autotune is used or not.
Further information can be programmed into the controller, see
SECOND SETPOINT, RANGING AND SETPOINT LOCK, IMPROVING
CONTROL ACCURACY
Functions and options
The facilities of the controller are selected from the multi-level menu
using the front panel mounted buttons.
Note: It is advisable to study this section before any
programming is undertaken.
Each level within the multi-level menu offers different functions, see
FUNCTIONS MENU for menu of main functions. Each function has a
range of user selections or options, see FUNCTION LIST for
functions and options details.
The controller has two modes, program mode and operating mode.
When in program mode the controller can be programmed with
settings and functions to suit the application. When in operating
mode the controller uses the setting and functions entered in the
program mode to control the application and also displays both the
process variable and setpoint temperatures. For full details on how
to program the controller see VIEWING AND SELECTING
FUNCTIONS.
Note: In this manual the letter k is represented by the
character
K
4
Set-up
SET-UP
5
This section details the four step initial configuration that
enables control with factory PID settings to start, once the
setpoint has been entered.
POWER-UP
On power-up the controller will display the self test
sequence and brief display blanking
1 SELECT INPUT SENSOR
Press and hold ✱ and use either the ▲ or ▼ buttons to
scroll through the sensor selection (see table p.31).
When the correct sensor is displayed, release the
buttons. The controller will now display selected sensor
type e.g.
2 TO SELECT °C/°F
Press and release the ▲ button, the controller will now
display
Press and hold the ✱ button and using the ▲ button
select °C, °F, Bar, PSI, Ph, Rh or SEt as required. Release the
buttons when the correct unit is displayed.
The controller will now display
unit
and e.g. ºC
3 TO SELECT SP1
(Main setpoint output device)
Note: Dual Relay and Dual SSd Output Options Models
CN9411 and CN9422 have their outputs preconfigured. (see page 22)
Press and release the ▲ button, the controller will now
display
Press and hold the ✱ button and using the ▲ button
select
SSd
or
rLY
as required. Release the buttons when
the correct device is displayed. The controller will now
display
SPI.d
and selected output device e.g.
SSd
.
4 To enter initial configuration into
controller memory
Press and hold both ▲ and ▼ buttons for 3 seconds.
The upper display will now alternate
ParK
and measured variable (temperature)
(eg. 23)
ParK
is displayed because
a setpoint has not yet been entered as
shown by the lower display
TO SET THE MAIN SETPOINT
To display the setpoint, press and hold the ✱ button. °Cand
0
or °Fand 32will be displayed. Press and hold the ✱
button. Press ▲ to increase or ▼ to decrease the setpoint.
The main setpoint LED will flash indicating that SP1 output is
ON. The controller will now be set with the factory PID
settings.
INPT
NONE
SP1>D
NONE
SP1>D
SSD
INPT
TCS
UNIT
NONE
UNIT
*C
PARK
0
Menu Navigation
MENU NAVIGATION
To change an option value or setting
Press and hold the ✱ button, then press ▲ to increase or ▼ to
decrease the value or select the next option.
Note: Check the new option value before moving to
another function or exiting program mode.
To change levels
Press and hold ▼ to scroll through the functions until
LEUL
is
displayed. Release ▼ to display current level. Press and hold the ✱
button, then press ▲ to increase or ▼ to decrease the level.
Release buttons when required level is obtained.
To exit program mode
Press and hold both ▲ and ▼ buttons for at least 3 seconds.
Note: Control commences with any new instructions now
entered in the memory.
REMINDER OF INSTRUMENT ADJUSTMENTS
Press ▲ ▼ together for 3 seconds for program entry or exit.
Press ▲ or ▼ to scroll through functions.
Press ✱ ▲ together or ✱ ▼ together to change levels or alter
options.
Note: If in difficulty by becoming “lost” in program mode,
press ▲ and ▼ together for 3 seconds to return
to display mode, check the Menu Navigation
summary above and try again.
The facilities of the controller are selected from the multi-level menu
using the front panel mounted buttons.
Each level within the multi-level menu offers different functions, see
FUNCTIONS MENU page A3. Each function has a range of user
selections or options, see FUNCTION LIST pages 16–22
In operating mode, the upper (green) display reads process
temperature (PV) and the lower (orange) display reads setpoint
temperature (SP).
When in program mode, settings of each function, shown in the
upper display, can be made by selecting an appropriate option
from the lower display.
USING PROGRAM MODE
Note: The controller will auto-exit program mode after
60 seconds of inactivity.
To enter program mode from normal operating mode
Press and hold both ▲ and ▼ buttons for at least
3 seconds.
Release the buttons together and the controller will
now display the function and option (setting of that
function), e.g.
To view function on the same level and display current option
Press ▲ or ▼ button once to view the next function.
Press and hold ▲ or ▼ buttons to scroll through functions. The
current option or function value is shown in the lower display.
6
TUNE
OFF
Autotune
AUTOTUNE
Select the most appropriate method of Autotune , Tune or
Tune at Setpoint, to suit the application.
Note: The proportional cycle-time can be pre-selected
before starting Autotune, see PROPORTIONAL
CYCLE-TIME.
The TUNE program should be run with the load cool. The output is
cycled at 75% of the setpoint value to avoid any overshoot during
the tuning cycle. The warm-up characteristics are monitored and set
DAC which minimises overshoot on subsequent warm-ups.
The TUNE AT SETPOINT program is recommended:
when the setpoint is below 100°C/200°F, where
TUNE’s tuning cycle at 75% setpoint may be too
close to ambient to produce good results;
when the process is already hot and the cooling
rate is slow;
when controlling multi-zone or heat-cool
applications;
to re-tune if the setpoint is changed substantially
from previous Autotune.
Note: dAC is not re-tuned by TUNE AT SETPOINT.
TUNE PROGRAM
Enter program mode
and from the display
press and hold ✱ and press ▲ once,
the controller will now display
Exit program mode.
The TUNE program will now start. The upper display will
alternate between
tune
and the process temperature as it
climbs to setpoint.
The lower display will read the setpoint value e.g.
Note: During tuning, the main setpoint (SP1) LED will flash.
Temp
Setpoint
Cycle
75% SP
Start
TUNE
TUNE
Tuning DAC
PID
1
1
/4 on/off tuning
cycles
New PID
values
entered
Time
(100% output)
7
TUNE
OFF
TUNE
ON
TUNE
232
Autotune
The TUNE AT SETPOINT program will now start. The upper display
will alternate
tune
and the process temperature.
The lower display will read the setpoint value.
Note: During tuning the main setpoint (SP1) LED will flash.
When the TUNE AT SETPOINT program is complete the upper
alternating display stops and only the process temperature is
displayed. The PID values are entered automatically. The
process temperature will rise to setpoint and control should
be stable. If not, this may be because optimum cycle time
is not automatically implemented. To set the cycle time see
PROPORTIONAL CYCLE-TIME.
When the TUNE program is complete the upper alternating
display stops and only the process temperature is displayed. The PID
values are entered automatically. The process temperature will rise
to setpoint and control should be stable. If not, this may be
because optimum cycle time is not automatically implemented. To
set the cycle time see PROPORTIONAL CYCLE-TIME.
TUNE AT SETPOINT PROGRAM
Enter program mode and select
And from the display select
Exit program mode.
Temp
Setpoint
Start
TUNE
Tuning
PID
1
3
/4 on/off tuning
cycles
New PID
values
entered
Time
(100% output)
AT.SP
Overshoot
during tuning
Prop band
REMINDER OF INSTRUMENT ADJUSTMENTS
Press ▲ ▼ together for 3 seconds for program entry or exit.
Press ▲ or ▼ to scroll through functions.
Press ✱ ▲ together or ✱ ▼ together to change levels or alter
options.
Note: If in difficulty by becoming “lost” in program mode,
press ▲ and ▼ together for 3 seconds to return
to display mode, check the Menu Navigation
summary above and try again.
8
TUNE
OFF
TUNE
AT.SP
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