GE CTR 80 manual Setup, RS-232 Cable Wiring for, IBM PC and Compatibles, Baud Rate

Page 51

10 Digital Communication Interface

10.1.1Wiring

The serial communications ca- ble attaches to the calibrator through the DB-9 connector at the back of the instrument. Fig- ure 5 shows the pin-out of this connector and suggested cable wiring. To eliminate noise the serial cable should be shielded with low resistance between the connector (DB-9) and the shield. If the unit is used in a heavy industrial setting, the se- rial cable must be limited to ONE METER in length.

10.1.2Setup

Before operation the serial in- terface must first be set up by programming the baud rate and other configuration parameters. These parameters are pro- grammed within the serial inter- face menu. The serial interface parameters menu is outlined in Figure 4 on page 36.

 

RS-232 Cable Wiring for

 

IBM PC and Compatibles

Instrument

Computer (DTE)

Connector

Connector

(DB 9-Pin)

(DB 9-Pin)

1 NC

1 DCD

2 RxD

2 RxD

3 TxD

3 TxD

4 NC

4 DTR

5 GND

5 GND

6 NC

6 DSR

7 RTS

7 RTS

8 CTS

8 CTS

9 NC

9 NC

Instrument

Computer (DTE)

Connector

Connector

(DB 9-Pin)

(DB 25-Pin)

1 NC

 

2 RxD

2 TxD

3 TxD

3 RxD

4 NC

4 RTS

5 GND

5 CTS

6 NC

6 DSR

7 RTS

7 GND

8 CTS

8 DCD

9 NC

20 DTR

Figure 5 Serial Cable Wiring

To enter the serial parameter

programming mode first press “EXIT” while pressing “SET” and release to en- ter the secondary menu. Press “SET” repeatedly until the display reads “PAr”. Press “UP” until the serial interface menu is indicated with“SErIAL”. Finally press “SET” to enter the serial parameter menu. In the serial interface parame- ters menu are the baud rate, the sample rate, the duplex mode, and the linefeed parameter.

10.1.2.1Baud Rate

The baud rate is the first parameter in the menu. The display prompts with the baud rate parameter by showing “bAUd”. Press “SET” to choose to set the baud rate. The current baud rate value is displayed. The baud rate of the instru- ment serial communications may be programmed to 300, 600, 1200, 2400, 4800, or 9600 baud. The baud rate is pre-programmed to 2400 baud. Use “UP” or “DOWN” to change the baud rate value. Press “SET” to set the baud rate to the new value or “EXIT” to abort the operation and skip to the next parameter in the menu.

48

Page 50 Page 52
Image 51
Page 50 Page 52
Contents
GE Kaye World Headquarters Table of Contents Parts and Controls General OperationController Operation Digital Communication Interface Maintenance Trouble ShootingWiring Diagram Figures Tables Before You Start Symbols UsedCanadian Standards Association Safety InformationBurn Hazard Bath Fluids Cold Baths World Headquarters Customer Service InformationIntroduction Environmental Conditions SpecificationsAfter-Warranty Repairs Hardware Warranty and AssistanceInstrument Warranty In-Warranty RepairsCustomer Site Assistance Equipment Maintenance AgreementsCustomer Support Customer Support AgreementQuick Start UnpackingSet-up Setting the Temperature PowerAccess set-point selection Set-point 1, 25.0C currently used Dry-out Period InstallationDrain Valve Installation Instructions Bath EnvironmentFilling With Fluid Necessary General Comparison CalibrationBath Use Calibration of Multiple Probes Control Panel Parts and ControlsBack Panel Bath Tank and LidBack Panel Viscosity Temperature RangeGeneral Operation Bath FluidElectrical Resistivity SafetyThermal Conductivity Thermal ExpansionEthanol CostCommonly Used Fluids Water DistilledFluid Characteristics Table Mineral OilSilicone Oil Dow Corning 200.05, 200.10 Table of Various Bath Fluids Limitations and DisclaimerStirring HeaterRefrigeration Temperature Controller OperationImportant Refrigerant Information General Operation Programmable Set-points Bath TemperatureTemperature Set-point Controller OperationDisplay Temperature Set-point Value Temperature Scale UnitsScan Scan ControlScan Rate Heater Power Secondary MenuProportional Band New proportional band setting CO= 80C CutoutLow Limit Controller ConfigurationOperating Parameters High LimitCooling Serial Interface Parameters Duplex Mode Baud Rate Sample Period Linefeed Calibration ParametersDelta Hard Cutout11.2 R0 AlphaSerial Communications Digital Communication InterfaceIBM PC and Compatibles WiringSetup RS-232 Cable Wiring forSample Period Interface CommandsDuplex Mode Serial OperationSecondary Menu Lfeed=on Lf=on Calibration Calibration ProcedureCalibration Procedure Calibration EquipmentCalibration Procedure Maintenance Maintenance Troubleshooting Trouble ShootingLow Voltage Directive Safety CE CommentsEMC Directive Revisions Wiring Diagram
Top Page Image Contents