Black Box IC026A-R2, IC026AE-R2 manual Ieee Address Selection, Talk-Back Features

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RS-232↔IEEE 488 INTERFACE CONVERTER

4.3 IEEE Address Selection

SW3-1 through SW3-5 select the IEEE bus address of the IEEE peripheral the interface converter will be communicating with. These switches set the address of the IEEE device that will be controlled, not the address of the interface converter. The address of the interface converter is automatically adjusted so that address conflicts will not occur. The address is selected by simple binary weighting with SW3-1 being the least significant bit and SW3-5 the most significant. If address 31 (reserved on the IEEE bus) is selected

in the controller mode, address 30 is assigned as the device it will be communicating with. The following figure shows the IEEE address selection of 10.

0

1

1

2

3

4

5

6

7

8

Switch

Side

View

OPEN

0 x 16	-0
1 x 8	-8
0 x 4	-0
1 x 2	-2
0 x 1	+ -0

IEEE Address = 10

DOT

Figure 4-1. Switch SW3: Selecting the IEEE Address.

4.4 Talk-Back Features

Two different switch-selectable talk-back features are included to provide bi- directional communication with the IEEE device. Whether either talk-back feature should be enabled depends on the application.

4.4.1TALK-BACK ON TERMINATOR

SW1-7 is used to determine whether the interface should address the attached bus device to talk after sending the selected IEEE bus terminator(s). This feature is commonly used to provide bidirectional communication with a single IEEE instrument. Talk-back will only occur if there is no serial data to output to the IEEE device. The factory default is Talk-Back On Terminator enabled.

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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