Omega Engineering #M3350/0101 3 RS-485 Network, Wiring the Network and Connecting the Computer

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Wiring the Network and Connecting the Computer

2.2.3 RS-485 Network

If your computer is equipped with an RS-485 interface, connect to the controller network in accordance with the instructions provided with that option card.

If you plan to use a serial (COM) port to connect to your network, install an RS-232-to- RS-485 converter on the port (see diagram below). A suitable converter is available from Omega.

RS-232/RS-485 converter; Omega part number 223A001U01*

Up to 2000 ft

1

6

2	(B)	(A) 7
	13	14
3		8
4		9
	11	12
5
		10

Other controllers

* Converter is supplied with a wallplug-mounted power		To
transformer.		To
transformer.		Controller
		Controller	(A)
		Terminal 14	(A)
		To	(B)
		Controller	(B)
		Terminal 13

Data cable assembly DB 9 to DB 25, or DB 9 to DB 9 depending on your computer

Computer

RS-232 port

Wire directly to screw terminals on converter. B on converter goes to A on unit, A on converter goes to B

+12 V GND

RD(B)

RD(A)

TD(B)

TD(A)

RS-485 Communication:

One-to-many connection between an RS-232 port (with converter) and multiple

controllers; if the computer has an RS-485 port, no converter is needed

2-3

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Contents CN8-SW Table of Contents Changing Controller Mode and Using Autotune Viewing and Changing Controller Configuration ParametersConfiguring and Running Ramp and Soak Recipes CN8-SWUserÕs GuideTable of Contents 11-1CN8-SWUserÕs Guide Features Transforms a PC into an Operator StationGraphical Interface Storing and Loading Configuration Parameter Sets Automated Ramp and Soak CyclesLogging IntroductionLocal Alarms Hardware and Software Requirements1 CN8-SW Computer ControllersOverview of Setup Tasks Step Task Section This ManualCN8-SWUserÕs Guide Step Task Section in this Manual Overview of CN8-SW Menus Availability of FunctionsFile Menu Function Purpose SectionController Menu Edit MenuView Menu Alarms Help Menu Options MenuRamp/Soak Menu General Instructions for Using CN8-SW Windows Menu Convention Used in This ManualCN8-SWUserÕs Guide Wiring the Network and Connecting the Computer Introduction2 RS-232 Interface Connecting Controllers and the Computer to the NetworkIntroduction Wiring the Network and Connecting the Computer 3 RS-485 NetworkCN8-SWUserÕs Guide To install the software Installing the Software and LoggingInstalling the Software CN8-SWUserÕs Guide Installing the Software and Logging Starting the SoftwareLogging In to CN8-SW Using the Default Account To logChanging the Password for the Default Account To change the passwordTo see the permissions available to a user account Setting Up Operator AccountsPermissions Available Procedure To add an operator login accountLogging Out of the CN8-SW Application Editing an Operator AccountDeleting an Operator Account Establishing Communication with Controllers Communication Parameters Network Addresses Establishing Communication with ControllersConfiguring Communication Parameters for CN8-SW System To configure the CN8-SW communication settingsEstablishing Communication with Controllers Automatically Using the Find Controllers Option Recognizing Controllers with the CN8-SW SoftwareTo use the automatic function If any controllers were not recognized Page Manually Using the Controller Menu To add a controller manuallyDeleting a Controller To delete a controllerChanging Baud Rate after Communication Has Been Established Establishing Communication with Controllers Naming Controllers Saving the .MCS FileClosing an .MCS File Creating a New .MCS FileOpening an Existing .MCS File CN8-SWUserÕs Guide Configuring Local Alarms ProcedureCN8-SWUserÕs Guide Viewing Process Values and Changing Setpoint Viewing PV and SP in the Main Window Viewing PV and SP in a Graph To view the real-time trend graphSetpoint Changing the Setpoint Using the Setpoint Dialog BoxTo change a controllerÕs setpoint Configuring and Invoking the Single-Step Ramp Function CN8-SWUserÕs Guide To invoke the single step ramp function Changing Controller Mode and Using Autotune To change a controllerÕs modeCN8-SWUserÕs Guide Viewing and Changing Controller Configuration Parameters Accessing Configuration Parameter DisplaysUsing Configuration Parameter Displays To access the parameter displaysCN8-SWUserÕs Guide Configuring and Running Ramp and Soak Recipes Configuring CN8-SW Recipes Creating a New RecipeConfiguring and Running Ramp and Soak Recipes Editing an Existing Recipe To run a CN8-SW Ramp/Soak recipe Running CN8-SW RecipesStarting to Run a Recipe Holding Pausing Recipe Execution To hold execution of a CN8-SW recipeResuming Recipe Execution To resume execution of a ÒheldÓ recipeStopping Recipe Execution To stop execution of a CN8-SW recipeConfiguring Controller Ramp and Soak Parameters CN8-SWUserÕs Guide Configuring and Running Ramp and Soak Recipes Running Controller Ramp and Soak Cycles Storing and Loading Controller Configurations Storing Configuration Storing and Loading Controller Configurations Loading Configuration Storing and Loading Controller Configurations 10-6 Turning On the Logging Function To turn on the logging functionTo turn off the logging function Viewing and Printing Log FilesTurning Off the Logging Function Index 12-2