Model 232SS2 Document 232SS21600 This product Designed Manuf
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Smart Switch
Model 232SS2
Document 232SS21600
This product Designed Manufactured domestic imported parts
International Headquarters
Electronics Mfg. Inc. Dayton Road P.O. 1040 Ottawa, 61350 Phone (815) 433-5100 General (815) 433-5105 Home Page: www.bb-elec.com Sales e-mail: Technical Support e-mail:
orders@bb.elec.com (815) 433-5109 support@bb.elec.com (815) 433-5104
1992 Electronics Revised April 2000
232SS21600 Manual
Cover Page
Electronics Dayton 1040 Ottawa 61350 815-433-5100 815-433-5104
Electronics RESERVED.
part this publication reproduced transmitted form means, electronic mechanical, including photography, recording, information storage retrieval system without written consent. Information this manual subject change without notice, does represent commitment part Electronics. Electronics shall liable incidental consequential damages resulting from furnishing, performance, this manual. brand names used this manual registered trademarks their respective owners. trademarks other designations this publication reference purposes only does constitute endorsement trademark holder.
TABLE CONTENTS
Chapter INTRODUCTION.1 Checklist.2 Chapter SETUP Port Configuration Serial Data Configuration Smart Switch Operation Programming Second Character Binary File Transfer.7 Smart Switch/Port Combiner Mode.8 Specifications Chapter SOFTWARE.12 Introduction Windows SSwitch.12 SSTSR Parameters.15 Default Values.16 Help Screen Un-Install Selecting Ports Method.17 Command Line Method.17 APPENDIX ASCII Character Codes APPENDIX Cable Charts .B-1
232SS21600 Manual
Table Contents
Electronics Dayton 1040 Ottawa 61350 815-433-5100 815-433-5104
Chapter INTRODUCTION
RS-232 Four Port Smart Switch/Port Combiner, Model 232SS2, allows RS-232 host device connect many four RS-232 devices. switch controlled different ways. first referred smart switch mode. this mode, switch controlled sending programmable preamble code "Master" port 232SS2. other switch controlled referred port combiner mode. port combiner mode, slave port gain access master port asserting handshake line. none slave ports have their handshake line asserted, switch controlled using preamble code. master port configured port internal switch setting. master port configured port, four slave ports will become ports. 232SS2 supports following signals: RTS, CTS, DSR, DCD, DTR. 232SS2 enhanced mode which offers special timer features. timer features used prevent slave devices from receiving preamble commands, inadvertently switching from binary/graphic file transfers, inactive slave devices from holding control master port. 232SS2 will work with baud rates from 1200 115,200 bps; data bits; even, parity; stop bits (7,N,1 allowed). NOTE: data format rates mentioned used switch 232SS2. communication between devices format data rate. There four LED's 232SS2 indicate which port connected master port. master port DB-25S female connector slave ports have DB-25S female connectors. 232SS2 requires 12Vdc 100ma. which provided through 2.5mm power jack.
232SS21600Manual
Electronics Dayton 1040 Ottawa 61350 815-433-5100 815-433-5104
Checklist
Examine shipping carton contents physical damage. damage found, file claim with shipper immediately. following equipment should shipping carton: RS-232 Smart Switch Instruction Manual 3.5" floppy disks items above shipping carton contact shipper immediately.
232SS21600 Manual
Electronics Dayton 1040 Ottawa 61350 815-433-5100 815-433-5104
Chapter SETUP
232SS2 using eight-position dipswitch. This dipswitch used communication format, port configuration, smart switch/port combiner mode enable/disable enhanced features. change settings switch, remove power from unit, remove screws from bottom 232SS2. dipswitch located board (side with LEDs) labeled "SW1." other dipswitch, labeled "SW2" used second character preamble. After switches have been match your requirements, unit back together. Table shows settings dipswitch "SW1". Table Communication Port Setup Dipswitch Setting 1200 Baud 2400 Baud 4800 Baud 9600 Baud 19.2K Baud 38.4K Baud 57.6K Baud 115.2K Baud Enhanced Disabled Enhanced Enable Data Bits Data Bits Parity Disabled Parity Enabled Smart Switch Mode* Port Combiner Mode master port master port DON'T CARE FACTORY DEFAULT
232SS21600Manual
Electronics Dayton 1040 Ottawa 61350 815-433-5100 815-433-5104
Port Configuration
order determine proper port configuration 232SS2, necessary have basic understanding terms DTE. RS-232 designed, using DB-25 connectors, connecting (Data Terminal Equipment) device (Data Communication Equipment) device. Each device will have inputs pins that correspond outputs same pins other device. example, device will transmit data DB-25) device will receive data DB-25). serial printers devices, modems devices. (DTE device) going connected 232SS2 master port, master port should configured port. modem (DCE device) going connected master port, should configured port. master port configured port (data received port (data received setting dipswitch "SW1", position configure master port port, move dipswitch "SW1", position "OFF" position. When master port configured port, ports will become ports (Refer Table configure master port port move dipswitch "SW1", position "ON" position. When master port configured port, ports will become ports (Refer Table Always power down smart switch when changing switch settings.
232SS21600 Manual
Electronics Dayton 1040 Ottawa 61350 815-433-5100 815-433-5104
Table MASTER PORT CHART Master Port A,B,C Ports (DCE) Signal (DTE) Pin# Direction Description Pin# Direction Input Transmit Data (TD) Output Output Receive Data (RD) Input Input Request Send (RTS) Output Output Clear Send (CTS) Input Input Ready (DSR) Output GROUND Signal Ground (SG) GROUND Output Recv. Line Detect (DCD) Input Input Ready (DTR) Output Table MASTER PORT CHART Master Port A,B,C Ports (DTE) Signal (DCE) Pin# Direction Description Pin# Direction Output Transmit Data (TD) Input Input Receive Data (RD) Output Output Request Send (RTS) Input Input Clear Send (CTS) Output Output Ready (DSR) Input GROUND Signal Ground (SG) GROUND Input Recv. Line Detect (DCD) Output Output Ready (DTR) Input 232SS2 supports following RS-232 signals: RTS, CTS, DSR, DCD, DTR. Smart Switch selects port default port power
Serial Data Configuration
order host device that connected master port select four ports, Smart Switch must match host's communication format. Dipswitch "SW1" used select communication format Smart Switch. Switch positions through select baud rate. Switch position selects data bits. Switch position determines parity enabled disabled. NOTE: data format data bits, parity stop allowed.
232SS21600Manual
Electronics Dayton 1040 Ottawa 61350 815-433-5100 815-433-5104
Switch position selects port configuration, section titled "Port Configuration". Refer Table Always power down smart switch when changing switch settings.
Smart Switch Operation
Smart Switch mode selected when dipswitch "SW1" position "Off." Smart Switch mode, 232SS2 constantly looking three character preamble code monitoring data that being received master port from host device. 232SS2 requires three character preamble code turn port. first character must ASCII escape character (decimal 27). second character user programmable setting dipswitch "SW2". "SW2" comes from factory programmed ASCII character (decimal third character should ASCII upper case letters "A", "B", (decimal respectively) select those ports. turn selected port third character should ASCII character (decimal instance, turn port would send: were writing program BASIC control Smart Switch would form string like this: SWB$ CHR$(27) CHR$(2) could then send SWB$ select port Similar strings could used turning other ports. turn ports string might look like this: TOFF$ CHR$(27) CHR$(2) CHR$(4) When done with port either select directly turn selected port then turn next one. recommend that turn selected port before selecting next one. turn command consists three characters that non-printing (ESC EOT). port selected send command select port three characters (ESC will pass through port since still selected letter will show your port device. information preventing command codes from being received slave devices, refer Enhance Mode section. NOTE: There delay through Smart Switch data buffered.
232SS21600 Manual
Electronics Dayton 1040 Ottawa 61350 815-433-5100 815-433-5104
Programming Second Character
second character comes programmed ASCII character (decimal change this 8-bit character wish reprogramming dipswitch "SW2". "SW2" eightposition switch with each position equal certain weight. Refer "Setup" instructions removing cover access "SW2". Table shows weight chart "SW2". Table Programmable Character Setting Dipswitch SW2* WEIGHT *Factory Default ASCII "STX" character (decimal position only wish letter second character, which decimal value would turn switches 85). Caution should used when selecting second character, that itself, with character front valid command devices port. instance, some printers reset command. tried symbol (decimal second character could reset your printer every time preamble code sent. Note also that your communication configuration data bits cannot eighth SW2. list ASCII character codes their decimal values refer Appendix
Binary File Transfer
simple method using Smart Switch transfer binary files without concern accidentally disconnecting, file transfer baud rate different from baud rate Smart Switch. When transferring files different baud rate, Smart Switch will stay connected from last preamble code.
232SS21600Manual
Electronics Dayton 1040 Ottawa 61350 815-433-5100 815-433-5104
Smart Switch/Port Combiner Mode
This mode allow Ports select master port using handshake line. also allows selection from master port preamble code described Smart Switch Only Mode section. Position "SW1" must port combiner mode. When handshake line goes high four ports, will establish connection from that port master port. This works firstcome-first-serve basis. multiple ports have their handshake lines high, port that been waiting longest will next connected master port. example, (Initial conditions slave ports with handshake lines asserted.) chronological order, Port asserts handshake line, Port asserts handshake line, Port asserts handshake line then Port disasserts handshake line. When Port asserts handshake line, connection will made between master port Port When Port disasserts handshake line, Port will disconnected Port will connected master port. When Port disasserts handshake, Port will disconnected Port will connected master port. handshake line that used connect master port depends configuration master port (which turn determines configuration slave ports). master port configured port, then slave ports configured DCE, must raised device (which DTE) connect master port. master port configured port, then slave ports configured must raised device (which DCE) connect master port. example, port configured port (slave device DTE), order establish connection master port, device must high (assert). 232SS2 would recognize this prompt connection master port. connection would dropped soon from device lowered. devices ports raise time request connection. However, port connected master port, data sent from devices ports 232SS2 will lost. 232SS2 does have buffering. NOTE: When port selected Master Port, handshake lines will ignored until Master Port sends turn code. When Master Port selected handshake line, preamble codes will ignored.
232SS21600 Manual
Electronics Dayton 1040 Ottawa 61350 815-433-5100 815-433-5104
typical application would have tied together master port. When (assuming slave device) port (configured DCE) asserted, port will asserted when connection established. port connected master port, then that port will remain low. Therefore, port monitor handshake line determine connection been established. Enhanced Mode Timer Features 232SS2 enhanced mode, which offers special timer features. timer features used prevent slave devices from receiving preamble commands, inadvertent switching from binary/graphic file transfers, inactive slave devices from holding control master port. timer different modes: inactivity mode inadvertent switch mode. When inactivity mode, 232SS2 will monitor data lines. there activity specified time, selected slave port will disconnected from master port. When inadvertent switch mode, 232SS2 will ignore switching commands specified period time. After this time expired, selected slave port will disconnected from master port. timer functions enabled dipswitch setting through software commands. Dipswitch position must 232SS2 enhanced mode. software commands follow same format preamble codes used switching. There commands used timer functions: Timer Mode Timer Value. These commands require additional byte data. Timer Value command requires third byte ASCII character. data byte (fourth byte) must value between ASCII ASCII "9". value used disable timer. Refer Table timer values. example, sending following string 232SS2 will timer value seconds (assuming programmable character factory default SetTV$ CHR$(27) CHR$(2) +"T" tells 232SS2 timer value command indicates which timer value use.
232SS21600Manual
Electronics Dayton 1040 Ottawa 61350 815-433-5100 815-433-5104
Table Timer Values
Data Byte Value timer disabled 10ms 25ms 100ms 500ms min. min.
Timer Mode command requires third byte ASCII "M". data byte (fourth byte) ASCII "0", zero (default), timer will setup inactivity timer. example: Sending following string 232SS2 will timer inactivity timer (assuming programmable character factory default SetTM$ CHR$(27) CHR$(2) +"M" tells 232SS2 timer mode command indicates timer inactivity timer. When timer configured inactivity timer, 232SS2 will monitor data lines data. there activity specified timer value, slave port that connected master port will disconnected. smart switch mode, inactivity timer used prevent preamble codes from being received slave devices. port combiner mode, inactivity timer used prevent devices from tying master port. example (port combiner mode), slave ports have their handshake lines asserted. device Port handshake line asserted currently connected master port, been transmitting receiving data. When inactivity timer expires, Port will disconnected next slave port will then connected master port (following first-come-first-serve rule). Port will then placed "end line". data byte Timer Mode command ASCII "1", timer will setup ignore switching commands. Sending following string 232SS2 will timer ignore switching commands. (Assuming programmable character factory default SetTM$ CHR$(27) CHR$(2) +"M"
232SS21600 Manual
Electronics Dayton 1040 Ottawa 61350 815-433-5100 815-433-5104
tells 232SS2 timer mode command indicates timer ignore switching commands. When timer configured this mode, 232SS2 will accept switching commands ("A", "B", "C", "D", "EOT") specified timer value. After timer expired, slave port that connected master port will disconnected. This feature useful prevent inadvertent switching during binary/graphic type file transfers. example (smart switch mode): timer configured ignore switching commands seconds. select Port command sent 232SS2. Once Port connected file unknown data type file contain switching command sequence) transferred through 232SS2. period seconds after Port connected, switching commands will accepted. long file transfer takes less than seconds, there chance 232SS2 will inadvertently switch ports. Table 232SS2 Commands
Function Select Port Command Characters NU** Comments
Switching Command Select Port NU** Switching Command Select Port NU** Switching Command Select Port NU** Switching Command Deselect Port NU** Switching Command Timer Value "0"-"9" Enhanced Mode Timer Mode "0","1" Enhanced Mode represents programmable character dipswitch **NU Used
Specifications
232SS2 Model: 2.5hin Size: Power: 12Vdc 16Vdc 100mA
232SS21600Manual
Electronics Dayton 1040 Ottawa 61350 815-433-5100 815-433-5104
Chapter SOFTWARE Introduction
232M`SS2 comes with application programs that used switch between ports. Each comes separate floppy disk. Either used independently final application testing functionality hardware. SSwitch program Windows program that allows switch ports with buttons Windows interface, from command line. will Windows Windows with service pack installed. When software installed, example file, SSWVb6.txt, also placed same directory. This text file with Visual Basic sample code. gives examples open port, assemble switching commands, send them port. accessed selecting START/PROGRAMS/B&B Electronics/SSWITCH/Sample Code. Smart Switch, Terminate Stay Resident (SSTSR) Program (IBM Compatible), only application which allows user change Smart Switch ports either through command line hitting sequence keys same time, referred keys. SSTSR program requires memory.
Windows SSwitch
Installation install SSwitch Program (Windows 95/98 From START/ SETTINGS/ CONTROL PANEL Select Add/Remove Programs Insert Smart Switch Windows disk select Install Follow Installation prompts complete installation Running SSwitch SSwitch program launched from desktop shortcut from Start/Programs/B&B Electronics/SSwitch directory default directory selected during installation. Smart Switch software configuration changed SSwitch program selecting Ports/Configuration from menu. change port selection clicking option using up/down arrow keys. port selection also changed command line typing SSwitch letter representing that port. example, change port would enter SSwitch command line. letter (none) used close ports. 232SS21600 Manual
Electronics Dayton 1040 Ottawa 61350 815-433-5100 815-433-5104
Uninstall SSwitch.exe From START/ SETTINGS/ CONTROL PANEL Select Add/ Remove Programs Select SSwitch from list programs Click Add/Remove button
SSTSR
Installation Install SSTSR Program (DOS) drive your floppy drive: Place Smart Switch disk drive prompt Type a:\INSTALL.exe press ENTER key. following files will located your hard drive: 1)SSTSR.EXE executable file Smart Switch. 2)SETUP.EXE Configuration program SSTSR. There methods begin SSTSR program. first preferred SETUP.EXE program second through SSTSR.COM file. SETUP.EXE Method (preferred) software installed your hard drive follow these steps: Type press ENTER key. Type CD\SS press ENTER key. begin SSTSR program follow these steps: Type SETUP press ENTER key. will prompted parameters (for description refer Parameters section) that necessary SSTSR communicate with Smart Switch. value default values. this value desired, just press ENTER key.
232SS21600 Manual
Electronics Dayton 1040 Ottawa 61350 815-433-5100 815-433-5104
Enter Port Address [02F8]: Enter Baud Rate 1200 24006 4800 9600 19200) [7]: Enter Parity Even) [0]: Enter Number Data Bits Seven Data Bits Eight Data Bits) [8]: Enter Smart Switch Second Char (Decimal Value) [2]: Enter Sequence <LftShift><Alt><A|B|C|D|N> <Rht Shift><Alt><A|B|C|D|N> <Lft Shift><Alt><1|2|3|4|N> <Rht Shift><Alt><1|2|3|4|N> <CTRL><ALT><A|B|C|D|N> =<CTRL><ALT><1|2|3|4|N>)[1]: this point file called GO.BAT will created. Type press ENTER key. Once GO.BAT file created, every time wish begin SSTSR that need type press ENTER key. need change settings SSTSR simply SETUP.EXE program again create GO.BAT file. SSTSR.EXE Method SSTSR.EXE method requires same parameters (for description refer Parameters section) SETUP.EXE method, except that they specified through command line. Each these parameters begins with command symbol followed option defined following table. Command Description Options
Port Address Baud Rate Hexadecimal Address FFFFh) 1200 2400 4800 9600 19200 Data Bits Data Bits Even Decimal 255) <Left Shift><ALT><A|B|C|D|N> <Right Shift><ALT><A|B|C|D|N> <Left Shift><ALT><1|2|3|4|N> <Right Shift><ALT><1|2|3|4|N> <CTRL><ALT><A|B|C|D|N> <CTRL><ALT><1|2|3|4|N>
Number Data Bits Parity User Defined Char.
232SS21600 Manual
Electronics Dayton 1040 Ottawa 61350 815-433-5100 815-433-5104
software installed default directory: prompt Type press ENTER key. Type CD\232MSS2 press ENTER key. begin SSTSR program (the following will used example): Port Address 03F8 Parity Baud 9600 User Defined Char. Data Bits Sequence Type SSTSR A03F8 press ENTER key. Using this method, every time want install SSTSR with different parameter settings than default (refer Default Values section), missing parameter must specified.
Parameters
Port Address address where serial communications port located. Some typical port addresses follows: Port Address 03F8h 02F8h 03E8h 02E8h Baud Rate speed which communication takes place between SSTSR Smart Switch. must specified that equal Smart Switch. Number Data Bits length each character that gets sent from SSTSR Smart Switch. This value must specified that equal Smart Switch. Parity method error detection that takes place during transmission data between SSTSR Smart Switch. This value must specified that equal Smart Switch. User Defined Character must that equal Smart Switch.
232SS21600 Manual
Electronics Dayton 1040 Ottawa 61350 815-433-5100 815-433-5104
sequence three keys that must pressed simultaneously switch from Smart Switch Port another. example, sequence, <Left Shift> <ALT> <A|B|C|D|N> states that left shift, Alt, either must pressed same time select corresponding Smart Switch Port. turns Smart Switch ports.
Default Values
type SSTSR command line with parameters, omit parameters, default value missing parameter will used. default values are: Description Default Value 02F8h (COM Port Address 9600 Baud Rate Parity Parity Data Bits Data Bits (CTRL Second Character Sequence <Left Shift><ALT><A|B|C|D|N>
Help Screen
installing SSTSR using SSTSR.COM method, type SSTSR press ENTER obtain list commands their options.
Un-Install
SSTSR un-installed easily typing SSTSR pressing ENTER key. some cases SSTSR will uninstall. This caused another terminate stay resident (TSR) being installed after un-install SSTSR when this occurs, other must first un-installed, then SSTSR un-installed normally.
Selecting Ports
There different ways which Smart Switch port selected, either through command line pressing predefined sequence after SSTSR installed. When request change ports made, using either method, first current port turned off, then port selected turned methods described follows:
232SS21600 Manual
Electronics Dayton 1040 Ottawa 61350 815-433-5100 815-433-5104
Method
This method enables user select Smart Switch port pressing predefined sequence keys same time after SSTSR installed (refer Program Installation). Example: sequence <Lft Shift><Alt><A|B|C|D|N> selected, change ports would press same time: Left Shift select port Left Shift select port Left Shift select port Left Shift select port Left Shift turn ports
Command Line Method
This method enables user select Smart Switch port through command line. specify Smart Switch port through command line, would type SSTSR followed command symbol letter port. Example: change Smart Switch port '"C" would type SSTSR prompt press ENTER key. Before Smart Switch port changed, check made determine port busy transmitting. port busy STSR will generate tone notify that port busy that port change cannot made. CAUTION: software package using transmission running fast baud rate (57600), SSTSR detect Smart Switch port busy transmission could interrupted. SSTSR does detect when Smart Switch port receiving data. Therefore, data being received, Smart Switch port still changed.
232SS21600 Manual
Electronics Dayton 1040 Ottawa 61350 815-433-5100 815-433-5104
APPENDIX ASCII Character Codes
DECIMAL ASCII CONVERSION TABLE
ASCII ASCII ASCII ASCII
ctrl ctrl ctrl ctrl ctrl ctrl ctrl ctrl ctrl ctrl ctrl ctrl ctrl ctrl ctrl ctrl ctrl ctrl ctrl ctrl ctrl ctrl ctrl ctrl ctrl ctrl ctrl ctrl ctrl ctrl ctrl ctrl
232SS21600 Manual
Appendix
Electronics Dayton 1040 Ottawa 61350 815-433-5100 815-433-5104
APPENDIX Cable Charts
charts will indicate Master Port 232SS2 should configured port port. Refer Port Configuration section manual information Master Port configurations. Chart DB25 Connector Master Port
Straight Through Connection
Serial Port DB25 Connector Signal Direction <-<-GROUND 232SS2 Master Port (DCE) DB25 Connector
Chart Connector Master Port
Straight Through Connection
Serial Port Connector Signal Direction <-<-> GROUND <-232SS2 Master Port (DCE) DB25 Connector
232SS21600 Manual
Appendix
Electronics Dayton 1040 Ottawa 61350 815-433-5100 815-433-5104
Chart Modem DB25 Connector Master Port
Straight Through Connection
Async Modem Serial Port DB25 Connector Signal Direction GROUND <-232SS2 Master Port (DTE) DB25 Connector
Chart DB25 Connector Ports (DTE) Master port DCE, Slave port DTE.
Null Modem Connection
Serial Port DB25 Connector Signal Direction <-<-GROUND 232SS2 Ports (DTE) DB25 Connector
Appendix
232SS21600 Manual
Electronics Dayton 1040 Ottawa 61350 815-433-5100 815-433-5104
Chart DB25 Connector Ports (DCE) Master port DTE, Slave ports DCE.
Straight Through Connection
Serial Port DB25 Connector Signal Direction <-<-GROUND 232SS2 Ports (DCE) DB25 Connector
Chart Connector Ports (DTE) Master port DCE, Slave port DTE.
Null Modem Connection
Serial Port Connector Signal Direction <-<-> GROUND <-232SS2 Ports (DTE) DB25 Connector
232SS21600 Manual
Appendix
Electronics Dayton 1040 Ottawa 61350 815-433-5100 815-433-5104
Chart Connector Ports (DCE) Master port DTE, Slave port DCE.
Straight Through Connection
Serial Port Connector Signal Direction <-<-> GROUND <-232SS2 Ports (DCE) DB25 Connector
Appendix
232SS21600 Manual
Electronics Dayton 1040 Ottawa 61350 815-433-5100 815-433-5104
FEDERAL COMMUNICATIONS COMMISSION RADIO FREQUENCY INTERFACE STATEMENT
Class Equipment This equipment been tested found comply with limits Class digital device, pursuant Part Rules. These limits designed provide reasonable protection against harmful interference when equipment operated commercial environment. This equipment generates, uses, radiate radio frequency energy and, installed used accordance with instructions, cause harmful interference radio communications. Operation this equipment residential area likely cause harmful interference, which case user will required correct interference personal expense.
Class Equipment Statement
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