Omega CN9400 - Manual

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-Co...

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 Outpu...

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 hol...

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...

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 ...

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 dis...

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....

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 ▲ ...

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: dV.hi sets off alarm signal when temperature rises above a pre-set temperature above the setpoint. ...

Second Setpoint 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-u...

Error Messages ERROR MESSAGES Temp Setpoint Cycle 75% SP Start TUNE TUNE Tuning DAC PID New PIDvaluesentered Time (100% output) oS 1 oS 2 Ct A Ct b Ct 3 Ct 4 uS Ct 1 Ct 2 SENSOR FAULT Upper display alternates: inPt and FAiL Indicates: thermocouple burnout RTD/Pt100 open or short circuit or negative ...

Improving Control Accuracy IMPROVING CONTROL ACCURACY Temp Maximum Time Variance VAr ° hi ° ± 0.1 ° Minimum Lo ° 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 ...

Function List FUNCTION LIST (Levels 1 to 4) BAND Too narrow (oscillates) increase Too wide (slow warm up and response) decrease BAND Note: A Functions Menu is shown on the cover fold-out A3 LEVEL 1 F unction Options [Factory settings] shown in brackets SELECT AUTOTUNE [oFF] on ParK At.Sp Used to swi...

Function List LEVEL 2 F unction Options [Factory settings] shown in brackets MANUAL CONTROL MODES 0 to 100 % ‘read only’ Read SP1 output percentage power [oFF] 1 to 100 % (not in ON/OFF) SP1 manual percentage power control For manual control should a sensor fail. Record typical SP1.P values beforeha...

Function List Sensor burn-out/break protection Caution: Settings affect fail safe state. SP1 SP2 [uP.SC] Upscale Upscale dn.SC Downscale Downscale 1u.2d Upscale Downscale 1d.2u Downscale Upscale Select output modes: Direct/Reverse Caution: Settings affect fail safe state. SP1 SP2 [1r.2d] Reverse Dir...

Function List LEVEL 4 Access to level 4 is gained through in level 3. Press and hold ▲ and ▼ for 10 seconds. Enter level 4 at Lock , release ▲ and ▼ 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...

FACTORY SET OUTPUT OPTIONS 22 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. QUICK START (page 1a) or SET-UP (page 5) follow steps 1 and 2 ignore step 3 and proc...

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 a...

Advanced Settings 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 setti...

Advanced Settings 2.5 Therefore adjust SPAn to (-) 18 to correct error. Notes: (1) After making the adjustment the reading will immediately change. Allow time for the temperature to stabilise at T 2 before making any further adjustment. At this point, a ZEro adjustment may be needed, refer to step 1...

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. DIN...

Electrical Installation OUTPUT DEVICES Two of the following output devices are fitted to the controllers, depending on the model. 1 Solid state relay drive (SSd/SSd1/SSd2) 5Vdc +0/-15%, 15mA non isolating To switch a remote SSR (or logic) 2 Miniature power relay (rLY/rLY1) 2A/250V resistive, Form A/...

Sensor Selection Option/Sensor type Sensor range Linearity Thermocouples tc b B 0 to 1800 °C 32 to 3272 F Pt-30%Rh/Pt-6%Rh 2.0 * tc E E 0 to 600 °C 32 to 1112 F Chromel/Con 0.5 tc J J 0 to 800 °C 32 to 1472 F Iron/Constantan 0.5 tc K K -50 to 1200 °C -58 to 2192 F Chromel/Alumel 0.25* tc L L 0 to 80...

Specification Thermocouple 9 types Standards: IPTS/68/DIN 43710 CJC rejection: 20:1 (0.05°/°C) typical External resistance: 100 Ω maximum Resistance thermometer RTD-2/Pt100 2 wire Standards: DIN 43760 (100 Ω 0°C/138.5 Ω 100°C Pt) Bulb current: 0.2mA maximum Linear process inputs mV range: 0 to 50mV ...

FOR WARRANTY RETURNS, please have the following information available BEFORE contacting OMEGA:1. P.O. number under which the product was PURCHASED,2. Model and serial number of the product under warranty, and3. Repair instructions and/or specific problems relative to the product. FOR NON-WARRANTY RE...

http://www.omega.com e-mail: [email protected] ® User’s Guide CN9400 Dual Display Autotune Temperature Controller omega.com TM OMEGA ® OMEGAnet SM On-Line Service Internet e-mail http://www.omega.com [email protected] It is the policy of OMEGA to comply with all worldwide safety and EMC/EMI regulations th...