Serial Interface; Technical Background; Modes; Signal Transmission - Example - Lightware HDMI-TPS-TX210 User Manual

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4.DeviceConcept
4.8. Serial Interface
4.8.1. Technical Background
SerialdatacommunicationcanbeestablishedviathelocalRS-232port(Phoenixconnector)orviatheTPS
lines.TheRS-232ports–whichareconnectedtotheCPU–canbeconfiguredseparately(e.g.iftheBaud
ratesaredifferent,theCPUdoestheconversionautomaticallybetweentheports).TheRS-232portcanbe
switchedtoPass-throughmode,Controlmode,orCommandInjectionmode;seethefigurebelow.
Block diagram of the serial interface
Thefollowingsettingsaredefined:
1 TheLocalandtheTPSserialportsareinControl mode.
2 TheLocalandtheTPSserialportsareinPass-through mode.
3 TheLocalandtheTPSserialportsareinCommand Injection mode.

INFO: AllsettingsareavailableintheLDCsoftware,seesettingsintheRS-232
Onlyonemodecanbeusedatthesametime:Controlmode,orPass-throughmode,orCommandInjection
mode.Ifyouchooseoneofthem,TPSseriallinkandlocalRS-232portwilloperateinthesamemode.
4.8.2. RS-232 Modes
Pass-through Mode
Inpass-throughmode,thegivendeviceforwardsthedatathatiscomingfromoneofitsportstoanothersame
typeofport.ThecommandisnotprocessedbytheCPU.IncomingserialdataisforwardedfromlocalRS-232
porttotheTPSoutputportandvicaversainsidethetransmitter.
HDMI-TPS-TX200series–User'sManual
Control Mode
TheincomingdatafromthegivenportisprocessedandinterpretedbytheCPU.Themodeallowstocontrol
the transmitter directly. LW2 or LW3 protocol commands are accepted – depending on the current port
setting.
Command Injection Mode
In this mode, the transmitter works as an RS-232 bidirectional converter.TheTPS signal is converted to
RS-232dataandviceversa.TCP/IPportnumbersaredefinedfortheserialports(TPSandlocal)forthis
purpose.E.g.thedefaultCommandInjectionportnumberofthelocalRS-232portis8001.Ifacommand
iscomingfromtheTPSinterfacewhichaddressestotheportno.8001,itwillbetransmittedtotheTxpin
ofthelocalRS-232port.Thatworksintheoppositedirectionofcourseandthemethodisthesameonthe
serialinterfaceoftheTPSportaswell.
4.8.3. RS-232 Signal Transmission – Example
The Concept
TheSystemcontrollercansendcommandstothetransmitteranditisabletoremotecontroltheprojector
throughtheTPSreceiverviaRS-232.
Settings
section.
RS-232 Recognizer
ThistoolisabletorecognizeandstoretheincomingRS-232messageuntilthepreviouslydefinedstring
(delimiter)hasarrivedorthetimeouthaselapsedafterthelastdata.Thelastincomingserialdataisstored
anditcantriggeranactioninEventManager.
Appliedfirmwarepackage:v1.2.0 | LDCsoftware:v2.2.0
#commandinjection
▪ System controller:wirelessIPconnectiontothesameEthernetasthetransmitterisconnectedto.Use
adedicatedsoftwaretool(e.g.aterminal)whichissuitableforsendingcommandsviaTCP/IPtoa
certainIP:portaddress.
▪ Transmitter:settheRS-232modetoCommandInjectiononTPSoutputport.Setthefurtherparameters
(Baudrate,Databits,etc.)inaccordancewiththespecificationsoftheprojector.Thetransmitterwill
transmittheRS-232datatowardthereceiver.
▪ Receiver:settheRS-232modetoPass-throughonRS-232port.
▪ Projector:notetheRS-232portsettingthatisspecifiedbytheManufacturer.Connectasuitableserial
cablewiththeproperwiring.
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