GE RPT 301 user manual Communications, Changing the communication interface standard Figure

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8	RPT 301 User Manual

Communications

The installed instrument is controlled by the serial data interface. Software or hardware handshaking can be used on the RS232 interface and only software handshaking on the RS485 interface.

Changing the communication interface standard (Figure 2-3)

The communication interface standard is set at manufacture to RS232 but can be changed as follows:

Remove the lid of the instrument to gain access to the PCB.

CAUTION:

THE PCB CONTAINS SENSITIVE ELECTRONIC COMPONENTS.

Carefully connect the interface connector lead and the link LK2 in the following positions:

RS232
interface lead to PL1	RS485
LK2 to position A	interface lead to PL3
	LK2 to position B

Refit and secure the lid of the instrument.

K177 Issue No. 3

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Contents RPT General Electric Company. All rights reserved RPT Digital Output Pressure Transducer K177 K177 Issue No Safety Abbreviations and Symbols Iii K177 Issue No Specification DimensionsDescription AccuracyPower supply Pressure measurementData Communications Pressure connectionAccessories Mounting the Instrument Figure Pressure ConnectionInstrument Dimensions Electrical Connection Communication connectionsConnections for remote on/off control Communications Changing the communication interface standard FigureLK1 LK2 PL3PL1 RPT ScreeningCommand Summary System OperationCommand Function Measurement CR Crlf Command TerminatorsSet-up User calibrationSingle commands General Command FormatCommand Strings Page Error Message General Reply FormatData out of range Detailed Command Definitions Measurement Commands Return stored readingGet reading Auto send readingAuto Send from switch-on Set-up Commands Unit Set-upSet Resolution Command F, step, averageFilter Set-up Set Communications Options Status Command I,S/PIN, Name ValueCR formatIdentity Calibration Check User Calibration Linearity/Drift CompensationPIN Change PIN PIN, New PINLED Indicator Diagnostic ModeDiagnostic Mode GeneralCleaning Approved Service Agents