Black Box IC026A-R2, IC026AE-R2 Selecting the Mode, Switch SW3 Selecting the Ieee Bus Terminator

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RS-232↔IEEE 488 INTERFACE CONVERTER

3.4.2IEEE BUS TERMINATOR

SW3-6 through SW3-8 set the IEEE bus terminators used for data sent or received by the interface converter. EOI, a line used to signal the end of a multiple character bus transfer, may also be enabled. If enabled, EOI is asserted when the last selected bus terminator is sent. Factory default is LF Only with EOI disabled.

1 2 3 4 5 6 7 8

OPEN

CR Only

1 2 3 4 5 6 7 8

OPEN

LF Only

1 2 3 4 5 6 7 8

OPEN

EOI Disabled

1 2 3 4 5 6 7 8

OPEN

LF-CR

1 2 3 4 5 6 7 8

OPEN

CR-LF

1 2 3 4 5 6 7 8

OPEN

EOI Enabled

Switch

Side

View

DOT

Figure 3-9. Switch SW3: Selecting the IEEE Bus Terminator.

3.5 Selecting the Mode

SW2-1 sets the major operating mode of the interface converter. The IEEE Controller (RS-232-to-IEEE converter) mode allows a serial host device to send data to a single IEEE bus peripheral. Applications include interfacing a listen-only or addressable IEEE printer/plotter to a serial printer port. Refer to Chapter 4 for more detailed information on the controller mode of operation.

The Peripheral mode is used when interfacing a serial device to an IEEE controller. Data which is sent by the IEEE controller to the interface converter is transmitted out its serial port. Data received from the serial device is buffered by the interface converter until read by the IEEE controller. Refer to Chapter 5 for more detailed information on the peripheral mode of operation.

The factory default is the IEEE Controller mode, an RS-232-to-IEEE converter.

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Contents RS-232↔IEEE Interface Converter RS-232↔IEEE 488 Interface Converter Trademarks Used in this Manual RS-232↔IEEE 488 Interface Converter NOM Statement RS-232↔IEEE 488 Interface Converter Contents RS-232↔IEEE 488 Interface Converter Contents IEEE-488 Interface SpecificationsSerial Interface Specifications GeneralIntroduction DescriptionAbbreviations Inspection ConfigurationGetting Started Serial PortSW3 Serial Port Settings Switch SW1 Selecting the Serial Baud Rate Switch SW1 Selecting the Serial Word Length Data Bits Switch SW2 Selecting the Serial Parity Switch SW1 Selecting the Serial Handshake Switch SW2 Selecting the Serial Terminator Selecting Terminator SubstitutionSelecting the Mode Switch SW3 Selecting the Ieee Bus Terminator10. Switch SW2 Selecting the Mode Selecting the Ieee AddressFeature Selections Serial Interface 15. Selecting RS-232 or RS-422 Signal Levels Clear To Send-Input-Pin RxD Receive Data-Input-PinTxD Transmit Data-Output-Pin Request To Send-Output-Pin+RxD Receive Data Plus-Input-Pin Vtest Test Voltage-Output-PinGnd Ground-Pin +TxD Transmit Data Plus-Output-PinRTS CTS General DSR RTS CTSGetting Started Controller Operation Controller-Mode Serial to Ieee OperationSerial and Ieee Terminator Substitution Talk-Back Features Ieee Address SelectionSwitch SW1 Enabling or Disabling Talk-Back on Terminator Switch SW2 Enabling or Disabling Talk-Back on Timeout 7470A SP1PA1000,1000PDPA1000,6000PUSP0Plotter Applications A PC-Based Graphics System SW3 MacPlot Configuration Screen Setting the Internal DIP Shorting Jumper for RS-422 SW3 Printer Applications Peripheral-Mode Operation Peripheral OperationSerial and Ieee Input Buffers Ieee Data Transfers Controlled BUS Data Transfers Serial-Poll Status-Byte Register DIO8 Ieee Input Buffer not EmptySerial Input Buffer not Empty RsvNot Defined-Always Ieee Input Buffer FullUse of Serial and Bus Terminators Ieee 488 Bus ImplementationUntalk UNT SW3 View for Ieee Address Selection History Ieee 488 PrimerGeneral Structure RS-232↔IEEE 488 Interface Converter Send It to My Address DMMBus Management Lines Handshake Lines Data Valid DAVMultiline Commands Data LinesTalk Address Group TAG More on Service Requests Serial Poll Theory of Operation Address Device Part Number FunctionBoard Layout Component Layout of the Interface Converter’s MotherboardRED BLK Appendix A. Sample Dumb-Terminal Program CLSMultiline Messages SOHHow To Read the Chart Ascii CharacterIndex DIO1 DIO2 DIO3Index SW1 Copyright 1998. Black Box Corporation. All rights reserved