B&B Electronics 232BSS4, Buffered Smart Switch manual Smart Switch Only Mode, Description, Options

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Smart Switch Only Mode

Description:

Smart Switch Only mode is used when the host device connected to the Master port initiates all communications with the Slave devices. To use the 232BSS4 as a Smart Switch Only, Auto Select is left unchecked in the setup software.

In Smart Switch Only mode, the 232BSS4 is constantly looking for a command sequence by monitoring the data that is being received on the Master port from the host device. This command can tell the 232BSS4 to connect the Master port to a single Slave port, send data to one or more Slave ports at once, discontinue communications with all Slave ports, or ignore commands for a specific length of time.

All command characters are buffered until the full command sequence is received. If the 232BSS4 recognizes the data stream as a command sequence, the sequence is not passed through the switch.

Options:

Initial Connections:

Upon power-up, the 232BSS4 can be initialized to allow the Master access to any of the Slave ports without any commands sent. The Master to Slave and Slave to Master initialization are each independently configurable through the setup software. The Master can also be set to broadcast to any or all of the Slave ports on power-up. If no ports are selected to be initialized on power-up, the 232BSS4 will wait for a switching command before allowing the Master access to any of the Slaves.

3 or 4 Character Command:

The 232BSS4 commands can be set to be either three or four

characters long. The first two or three characters can be programmed to any value through the setup software. The third or fourth character is the actual command.

Thus the command sequence would look like: {Char1}{Char2}{Char3}{Command Character}

Char1-3 would be defined by the user through the setup software. Char3 would only be sent if the 232BSS4 was set up for a four character command.

Documentation Number 232BSS4-2907m

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&B Electronics Mfg Co Inc – 707 Dayton Rd - PO Box 1040 - Ottawa IL 61350 - Ph 815-433-5100 - Fax 815-433-5104 – www.bb-elec.com

B&B Electronics – Westlink Commercial Park – Oranmore, Galway, Ireland – Ph +353 91-792444 – Fax +353 91-792445 – www.bb-europe.com

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Contents of domestic and imported parts by Buffered Smart SwitchModel 232BSS4 This product designed and manufactured in Ottawa, Illinois USAPage APPENDIX C BLOCK DIAGRAM Table of ContentsCHAPTER 4 SETUP SOFTWARE APPENDIX B CABLE CHARTSDocumentation Number 232BSS4-2907m Documentation Number 232BSS4-2907m Chapter 1 - IntroductionDefault Parameters Specifications3. 2 3.5 floppy disks Checklist1. RS-232 Buffered Smart Switch model 232BSS4 2. Instruction Manual The following equipment should be in the shipping cartonDocumentation Number 232BSS4-2907m Chapter 2 OPERATION Symbols and ConventionsLED Indicators Port Configurations Options Smart Switch Only ModeDescription Command Explanation Command SummaryThree Character Command Format Four Character Command FormatCommands Select Port A to transmit and receive - “A” VB Example Table 2.2 Send Only and Clear Buffer Control Characters Table 2.3 - Timer Values commands and the Master can initiate the next communications sequence Auto Select/Smart Switch Mode Inactivity Time Figure 2.1. Multiple Terminals to a Host Controller Using the 232BSS4 as a Buffered Splitter/CombinerFigure 2.2. Back to Back Operation Back to Back Operation mux/demuxFigure 2.3. Expanding the Number of Slave Ports Cascading Multiple SwitchesSlave Devices that Automatically Send their Data Slave Devices that Require Polling 25 Pin DCE Chapter 3 PORT CONNECTIONSDTE/DCE Explanation 25 Pin DTESlave Port Connections Master Port ConnectionsConnection Chapter 4 SETUP SOFTWAREIntroduction Double Click ADD/REMOVE PROGRAMS Software InstallationSoftware Uninstall Select SETTINGS, CONTROL PANEL from the Windows START menuSingle Unit Main Screen Setup Tutorial26Documentation Number 232BSS42907 Manual Back to Back Main Screen 28Documentation Number 232BSS42907 Manual Default Parameters Copying Parameters Between SwitchesDocumentation Number 232BSS42907 Manual ASCII Appendix A ASCII Character CodesDECIMAL to HEX to ASCII CONVERSION TABLE Appendix A Chart B.2. DTE PC DB9 Connector to Master Port Appendix B Cable ChartsPins 6, 8, & 20 looped back internally on the 232BSS4 Chart B.1. DTE PC DB25 Connector to Master PortAppendix B Cable Charts Chart B.4. DCE Modem DB9 Connector to Master Port Pins 6, 8, & 20 looped back internally on the 232BSS4Chart B.3. DCE Modem DB25 Connector to Master Port Chart B.7. Ports A - D DTE to DCE Modem DB25 Connector Pins 1, 4, & 6 looped back internally on the 232BSS4Chart B.5. Ports A - D DTE to DTE PC DB25 Connector Chart B.6. Ports A - D DTE to DTE PC DB9 ConnectorChart B.8. Ports A - D DTE to DCE Modem DB9 Connector Pins 1, 4, & 6 looped back internally on the 232BSS4Documentation Number 232BSS42907 Manual UART UART Appendix C Block DiagramMASTER UARTDocumentation Number 232BSS42907 Manual DECLARATION OF CONFORMITY Appendix D Declaration of Conformity