Black Box IC026A-R2, IC026AE-R2 manual Serial Port Settings

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RS-232↔IEEE 488 INTERFACE CONVERTER

Note that the interface converter comes configured as an IEEE controller. In this mode, the interface converter is designed to allow an RS-232 computer to communicate with an IEEE peripheral such as a plotter. This controller mode is described in detail in Chapter 4.

The interface converter may also be configured as an IEEE peripheral. As an IEEE peripheral, it allows an IEEE controller to communicate with an RS-232 device. The peripheral mode of operation is described in detail in Chapter 5.

To modify any of these defaults, follow this simple procedure:

1.Disconnect the power supply from the AC line and from the interface. Also disconnect any IEEE or serial cables.

WARNING

Never open the interface converter’s case while it is connected to the AC line. Failure to observe this warning may result in equipment failure, personal injury, or death.

2.Place the interface converter upside down on a flat surface. Remove the four screws located near the rubber feet.

3.Return the interface converter to the upright position and carefully remove the top cover.

4.Change whichever DIP-switch settings you need to change.

5.When you have made all your changes, reverse this procedure to reassemble the interface converter.

3.3 Serial Port Settings

The first parameters to configure are those that correspond to the RS-232 port. These include baud rate, word length, number of stop bits, parity selection and type of RS-232 handshake. Each of these are described in the following sections.

3.3.1SERIAL BAUD RATE

The “baud rate” is the number of serial data bits per second transferred into and out of the RS-232 interface. SW1-1 through SW1-4 determine the serial baud rate. The factory-default baud rate is 9600 baud. Baud rates may be selected from 110 to 57,600 baud. Refer to the following diagram for specific baud rates.

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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 Configuration Getting StartedInspection 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 RxD Receive Data-Input-Pin TxD Transmit Data-Output-PinClear To Send-Input-Pin Request To Send-Output-PinVtest Test Voltage-Output-Pin Gnd Ground-Pin+RxD Receive Data Plus-Input-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 EmptyRsv Not Defined-AlwaysSerial Input Buffer not Empty 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