Related Manuals for Omega Engineering CN9400
Summary of Contents for Omega Engineering CN9400
- Page 1 User’ s Guide ® http://www.omega.com e-mail: info@omega.com CN9400 Dual Display Autotune Temperature Controller...
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Page 2: Table Of Contents
SAFETY INFORMATION FUNCTIONS MENU QUICK START Quick Start Set-up INTRODUCTION The controllers OVERVIEW Installation Set-up Autotune Cycle-time SET-UP Power-up Select input sensor Select display units Allocate output device Enter initial configuration Set main setpoint MENU NAVIGATION Using program mode AUTOTUNE 7 Tune program Tune at setpoint program PROPORTIONAL CYCLE-TIME... -
Page 3: Safety Information A1
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. -
Page 4: Functions Menu A3
FUNCTIONS MENU LEVL 4 LOCK PROG NO.AL DIS.S DER.S U S E R - P R O T E C T E D S E T T I N G S LEVL 3 SP1.D SP2.D BURN REU.D REU.L SPAN ZERO CHEK READ TECH UER C O N F I G U R E O U T P U T S A F E T Y S E T T I N G S LEVL 2 SP1.P... -
Page 5: Quick Start
Select unit. Press and hold and use the 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 Select SP1 (Main setpoint output device) Note: Dual Relay and Dual SSd Output Options Models CN9411 and CN9422 have their outputs... -
Page 6: 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. -
Page 7: 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) -
Page 8: Cycle-Time
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. -
Page 9: Set-Up
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 SELECT INPUT SENSOR Press and hold and use either the scroll through the sensor selection (see table p.31). -
Page 10: Menu Navigation
MENU NAVIGATION 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... -
Page 11: 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. -
Page 12: Tune At Setpoint Program
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. -
Page 13: Proportional Cycle-Time
The choice of cycle-time is influenced by the external switching device or load. eg. 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. - Page 14 Proportional Cycle-time (continued) If this cycle-time is suitable press and hold both buttons for 3 seconds to enter it into the controllers memory. If the calculated cycle-time is not compatible with the switching device press and hold the and hold until a more suitable cycle-time is displayed.
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Page 15: Programmer
RAMP-SOAK This feature enables the controller to ramp up or down from current temperature to a target setpoint at a pre-determined rate. It then controls at the target setpoint for an adjustable soak period before switching off the heat output. Set Ramp rate (0 to 9995 deg/hour) Press buttons for 3 seconds to enter... -
Page 16: Second Setpoint (Sp2)
SECOND SETPOINT (SP2) The second setpoint SP2 can be used to trigger an alarm or as a proportional control output. TO CONFIGURE SP2 AS AN ALARM Enter program mode. Select level 2 then followed by the required option below: Deviation Deviation high alarm low alarm... -
Page 17: Sp2 Subsidiary Mode
SUBSIDIARY SP2 MODE Latch/sequence or non-linear cool. Latch alarm LtCh When activated, the alarm latches until manually reset, even though the alarm condition may have disappeared. Sequence alarm hoLd When hoLd is selected, in any alarm mode, it prevents an alarm signal on power-up. -
Page 18: Error Messages
ERROR MESSAGES SENSOR FAULT Upper display alternates: inPt and FAiL Indicates: thermocouple burnout RTD/Pt100 open or short circuit or negative over-range. Action: Check sensor/wiring NON-VOLATILE MEMORY ERROR Upper display alternates: dAtA and FAiL Action: De-power briefly. Replace unit if problem persists MANUAL POWER ERROR Upper display alternates: hAnd and FAiL... -
Page 19: Improving Control Accuracy
The following functions are to assist engineers with machine development, commissioning and troubleshooting. READ SP1 OUTPUT PERCENTAGE POWER Poor control may be due to incorrectly sized heaters. SP1.P (Level 2) constantly displays the output percentage power applied, which at normal setpoint should ideally be within 20 - 80% to achieve stable control. -
Page 20: Function List
FUNCTION LIST Note: A Functions Menu is shown on the cover fold-out A3 LEVEL 1 unction Options [Factory settings] shown in brackets SELECT AUTOTUNE [oFF] on ParK At.Sp TUNE Used to switch the Autotune feature on and off, to select ParK or Autotune at setpoint. ParK temporarily turns the output(s) off. - Page 21 LEVEL 1 (continued) unction Options [Factory settings] shown in brackets A - - on.oF 0.1 - 81 sec [20] CYC.T SP1 proportional cycle-time (see pages 9/10) Determines the cycle rate of the output device for proportional control. Select on.oF for ON/OFF mode. [0] to * °C/°F OFST...
- Page 22 LEVEL 2 unction Options [Factory settings] shown in brackets MANUAL CONTROL MODES 0 to 100 % ‘read only’ SP1.P Read SP1 output percentage power [oFF] 1 to 100 % (not in ON/OFF) HAND SP1 manual percentage power control For manual control should a sensor fail. Record typical SP1.P values beforehand.
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Page 23: Level 3
LEVEL 3 OUTPUT CONFIGURATION Note: ‘Read only’ after initial configuration. rSET ALL full reset to factory settings required to change SP1.D unction Options [Factory settings] shown in brackets [nonE] rLY1 rLY2 SSd1 SP1.D Select SP1 output device [nonE] SSd rLY rLY2 rLY1 SSd2 SP2.D Read SP2 output device... - Page 24 LEVEL 3 (continued) unction Options [Factory settings] shown in brackets Select SP1/2 LED indicator modes REU.L [1n.2n] Normal 1i.2n Invert 1n.2i Normal 1i.2i Invert [0.0] to ±25% sensor maximum SPAN Sensor span adjust For recalibrating to a remote standard e.g. External Meter, data logger.
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Page 25: Level 4
LEVEL 4 Access to level 4 is gained through Press and hold for 10 seconds. Enter level 4 at Lock , release together. Display reads Program security using Lock Select from three Lock options: Press and hold , press to index. LEV.3 locks level 3 and 4 only- Technical Functions. -
Page 26: Output Options
FACTORY SET OUTPUT OPTIONS DUAL RELAY OR DUAL SSd OUTPUT MODELS The table below details the factory set output options. rLY2 is a 1A electromechanical relay, and SSd1/SSd2 is an identical second SSR drive output. Product Code rLY1 (2A) CN9411 SSd1 CN9422 QUICK START (page 1a) or SET-UP (page 5) follow steps 1... -
Page 27: Advanced Settings
Before embarking on the Advanced Settings, please familiarise yourself with the basic operation of the controller as described in this manual. The following instructions assume that the user understands how to make the initial configuration, can navigate through the Function Menu and successfully Autotune the controller in heating mode. -
Page 28: Calibration To Other Instrument
Heat Cool Strategy Configuration (continued) If no improvement, return to the original value and; In level 1 halve the value of If the process hunts between heating and cooling, a deadband setting may be needed. Enter a small value, eg. 1 and observe the process. Increase the setting until hunting stops. -
Page 29: Linear Input Calibration
Calibration to Another Instrument (continued) To make a correction when there are different errors across the scale. Adjust using the function SPAN 2.1 Chose a temperature near the bottom and another near the top of the scale. 2.2 Run the process at the lower temperature (T Note the error (E ) between the controller and the instrument readings. - Page 30 Linear Input Calibration (continued) 10 11 12 13 – – 5Vdc 15mA Outputs 4–20 mA 1 ohm from transducer Power up the controller, and in response to the prompt select an appropriate Linear Range from the table below. Ensure that the Nominal Signal Span chosen is wider than the transducer’s actual signal span, and the Nominal Scale is wider than the full scale of the engineering units to be displayed.
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Page 31: Mechanical Installation
The CN9400 Controller is designed to be mounted in a 1/16 DIN panel cutout. The unit is sleeve mounted with the front bezel assembly rated NEMA4/IP66 provided that: the panel is smooth and the panel cutout is accurate; the mounting instructions are carefully followed. -
Page 32: Minimum Spacing
The controller front bezel and circuit board assembly can be unplugged from the sleeve. Grasp the bezel firmly by the recesses on each side and pull. A Model CN9400 Dimensions in mm (inches) Note: The controller should be isolated before removing or refitting it in the sleeve,... -
Page 33: Electrical Installation
OUTPUT DEVICES Two of the following output devices are fitted to the controllers, depending on the model. Solid state relay drive (SSd/SSd1/SSd2) 5Vdc +0/-15%, 15mA non isolating To switch a remote SSR (or logic) Miniature power relay (rLY/rLY1) 2A/250V resistive, Form A/SPST contacts. Sub miniature power relay (rLY2) 1A/250V resistive, Form A/SPST contacts. -
Page 34: Connection Diagrams
ELECTRICAL INSTALLATION EN61010 - /CSA 22.2 No 1010.1 92 Compliance shall not be impaired when fitted to the final installation. Designed to offer a minimum of Basic Insulation only. The body responsible for the installation is to ensure that supplementary insulation suitable for Installation Category II or III is achieved when fully installed. -
Page 35: Input/Sensor Selection
Option/Sensor type Sensor range Thermocouples tc b 0 to 1800 °C tc E 0 to 600 °C tc J 0 to 800 °C tc K -50 to 1200 °C tc L 0 to 800 °C tc n -50 to 1200 °C tc r 0 to 1600 °C tc s... -
Page 36: Specification
SPECIFICATION Thermocouple 9 types Standards: IPTS/68/DIN 43710 CJC rejection: 20:1 (0.05°/°C) typical External resistance: Resistance thermometer RTD-2/Pt100 2 wire Standards: DIN 43760 (100 Bulb current: 0.2mA maximum Linear process inputs mV range: 0 to 50mV Applicable to all inputs SM = sensor maximum Calibration accuracy: ±0.25%SM ±1°C Sampling frequency:... - Page 37 OMEGA ENGINEERING, INC. warrants this unit to be free of defects in materials and workmanship for a period of 37 months from date of purchase. OMEGA Warranty adds an additional one (1) month grace period to the normal three (3) years product warranty to cover handling and shipping time.
- Page 38 Approach Directives. OMEGA will add the CE mark to every appropriate device upon certification. The information contained in this document is believed to be correct but OMEGA Engineering, Inc. accepts no liability for any errors it contains, and reserves the right to alter specifications without notice.