NT21_Setup Manual (V068-E1-1) (986757), страница 7
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Refer to this diagram only when wiring custom cables or connectingdevices with special interfaces.Block DiagramRS-232C sideD-SUB 9-pin Case+5 VSG6 FuseRPOWERIndicatorRS-422A/485 Dr/RecDC-DC ConvertorL9PhotocouplerRS-232CDr/RecRDSDRSCSDRER32RS-422A/485 side8 terminal blockRRLREGIS_5 V1IS_0 V2SG34SDBSDAR2-wire/4-wireSW1-6SW1-3R78RS-422A/485 CableShield ConnectionsSW1-4SW1-545FGTerminatingresistanceR5RDB6RDA78CSBCSASW1-2RS-422A DrWhen using RS-422A or RS-485 cables for long-distance communications, donot ground the shield at both ends of the communications line because large currents can flow through the shield due to the difference in potential at the two27SectionConnecting the NT Support Tool3-3grounding points.
We recommend grounding the shield at one end, as shown inthe following diagram.Signal linesNT-AL001RS-232CNT21HostRS-422A/485shieldConnect to theterminal block’sFG terminal.RS-232CNT21RS-232CNT213-3Connecting the NT Support ToolIn order to install the system program in the NT21, or to transmit screen datacreated with the NT Support Tool to the NT21, the NT21 must be connected to apersonal computer with an RS-232C cable.The NT21 connects with the RS-232C cable from a personal computer at serialport A.
When the host is connected at serial port B, the connection with the hostcan be maintained as it is while the NT21 is connected to the RS-232C cablefrom a personal computer.However, when a bar code reader is being used, it must be disconnected, so thatthe RS-232C cable can be connected, since they both use serial port A.Serial port A(RS-232C, 9-pin)Communication ConditionsThe communication conditions are automatically set when the system installerand NT Support Tool are started.Recommended Connector CableUse the cable indicated below.• CV500-CN228 (length: 2 m), made by OMRON(D-SUB 9-pin, male ⇔ D-SUB 25-pin, male)• XW2Z-S001 (conversion cable), made by OMRON(D-SUB 25-pin, female ⇔ half pitch 14-pin, male)• XW2Z-S002 (length: 2 m), made by OMRON(D-SUB 9-pin, male ⇔ D-SUB 9-pin, female)For details on making a connector cable, refer to Appendix E Making the Cablefor Connecting a PC (page 199).28SectionConnecting a Bar Code Reader3-43-4Connecting a Bar Code ReaderConnecting a bar code reader to the NT21 enables bar code data to be read ascharacter strings into character string input fields, and set in the character stringmemory table.In order to use a bar code reader, the Comm.
A Method memory switch must beset to Bar-Code Reader.For details on the method for inputting character strings with a bar code reader,refer to 3-7 Input of Numeric Values and Character Strings in the NT31/NT31C/NT631/NT631C/NT21 Programmable Terminal Reference Manual.Note Make sure that the power supply to the bar code reader and the power supply tothe PT are both OFF before connecting or disconnecting the cable.3-4-1 Connection MethodConnect the bar code reader to serial port A of the NT21, as shown in the figurebelow.NT21Bar code readerSerial port A(RS-232C, 9-pin)9-pin connectorConnector cableBar code reader cableExternalPowerSupply Bar code readerpower supply cableBar code reader must match the communication setting (3-4-2 Setting a BarCode Reader, page 29) and data format (3-4-3 Data Format, page 30) in order toconnect to the NT21.
Please confirm the specification of the bar code reader before using.Reference:S The bar code reader must be connected to serial port A. This means that itcannot be connected at the same time as the NT Support Tool. Note also thatwhen a bar code reader is used, the host must be connected at serial port B.S Do not use serial port A’s +5-V power supply as the bar code reader’s powersupply. Always supply power from an external power supply.3-4-2 Setting a Bar Code ReaderAfter connecting a bar code reader, set the communication conditions and othersettings for it by selecting from the system menu.Settings at the NT21At the NT21, set the communication conditions for communication with the barcode reader by using the memory switches, selecting from the options indicatedin the table below.
Select from them according to communication conditions thatcan be set at the bar code reader or other circumstances.For more detailed information on the actual system menu operations, refer to6-10 Setting the Bar Code Reader Input Function (page 144).ItemPossible SettingsDefault SettingData bits7 or 8 bits7 bitsStop bits1 or 2 bits2 bitsParityNone, odd, evenEven29SectionConnecting a Bar Code ReaderItemSettings at the Bar CodeReaderPossible Settings3-4Default SettingBaud rate4800, 9600, 19200 bps9600 bpsInput MethodManual, AutoManualMake the settings shown in the table below at the bar code reader. Make surethat the baud rate, parity, stop bit, and data bit settings match the communicationsettings made at the NT21.
For details on the setting method, refer to the operation manual for the bar code reader used.ItemPossible SettingsBaud rate4800, 9600, 19200 bpsParityEVEN, ODD, NONEStop bits1 or 2 bitsData bits7 or 8 bitsPreambleSTXPostambleETXRS/CS controlAvailableCommunication protocolNo-protocol modeTransmission of number of bar code label digitsTransmission prohibitedTransmission of ID charactersTransmission prohibitedBar code typesMulti-reading (all types can beread)Trigger switch settingAutomatic reading modeAbout RS/CS ControlDuring bar code reading, the NT21 performs RS/CS control.
When the InputMethod setting of the NT21 is set to Auto, the RS signal is turned OFF, prohibiting the next input, until the read data is notified to the host.Because of this, when the Auto setting is made, the next input is not possibleuntil the data is notified to the host.However, when the setting is Auto and the RS/CS signals of the cable areshorted, RS/CS control is ineffective. Consequently, data input from the barcode reader to the NT21 is updated regardless of whether or not the data is notified to the host.For details, refer to the operation manual for the bar code reader used.3-4-3 Data FormatThe data format for communication when using the bar code input function of theNT21 is shown below.STX(02H)DataDataDataETX(03H)The characters that are effective as data are hexadecimal codes from 20 to 7FH,and the maximum data length is 40 bytes.Data that does not follow the data format described above is invalidated and discarded.30SectionUsing a Memory Unit3-53-5Using a Memory UnitThis explains how to use a Memory Unit with the NT21.
By installing a MemoryUnit (NT-MF261) on the NT21, the system program or the screen data in theNT21 can be recorded (backed up) in the Memory Unit.In addition, the system program or the screen data in the Memory Unit can beautomatically read into the NT21 when it starts up. This means that system program and screen data can be changed easily at the operation site without connecting to the NT Support Tool.The data in the Memory Unit is retained without backup by a battery or othermeans.In systems where there are frequent setup changes, by preparing a number ofMemory Units in advance and recording screen data in them in accordance withthe control performed in each case, the NT21 screen data can be changed simply by installing the Memory Unit, without connecting to the NT Support Tool.Even if NT21 is replaced, the previous status can be maintained simply by installing the Memory Unit that retains the system program and screen data of the previous NT21.By using the following combinations, data can be stored (backed up) to aMemory Unit.• Screen data for two PTs.• System program for two PTs.• System program and screen data for one PT.One Memory Unit can store the screen data for two PTs.Note1.
Make sure that the power supply to the PT is OFF before connecting or disconnecting a Memory Unit. After mounting a Memory Unit, be sure to tightenits two screws. Otherwise the product may malfunction.2. During data transmission, do not turn OFF the power supply to the NT21.3.
Do not touch the PCB (printed circuit board) with bare hands.Also, discharge any static electricity by touching a grounded object beforeconnecting or disconnecting a Memory Unit. Static electricity may cause thecomponents to malfunction.Reference:S When a Memory Unit is mounted, the NT21 cannot be set to the operating status. On completion of data transmission with a Memory Unit, always disconnect the Memory Unit from the NT21 before starting NT21 operation.S Memory Units (NT-MF261) can be used in common for the following PT models: NT21 and NT31. One Memory Unit can store screen data for up to two PTsof different models.
However, since the data compatibility is not completedamong NT21 and NT31 models, an error may occur if an attempt is made toread other PT model’s data with an NT21. (The data must be converted usingthe NT Support Tool.)S One Memory Unit can store a system program for up to two PTs of differentmodels. In order to transmit a system program from the Memory Unit to theNT21, the system program must be compatible to the target PT model.S The status of memory switch settings and system settings can be recorded tothe Memory Unit besides screen data.
When the data in the Memory Unit iswritten into the NT21, make sure that these settings can be adapted to theNT21 used before transmission.31SectionUsing a Memory Unit3-53-5-1 Installation MethodInstall the Memory Unit (NT-MF261) at the expansion interface connector at therear of the NT21 as shown in the figure below.Mounting screwsScrew hole3-5-2 Method of UseAs shown in the figure below, a Memory Unit has 2 four-pin DIP switches, andthe operation is determined by the DIP switch settings at startup.12341234Factory setting is turned all to OFF.OFFOFFSW1SW2Note Always confirm that the power to the NT21 is OFF before setting the DIPswitches.DIP Switch FunctionsThe functions of the DIP switches on the Memory Unit are indicated in the tablebelow.• SW1PinFunctionSW1 1SW1-1Automatic transmission (writing from the MemoryUnit to the PT)OFF: Not executedSW1 2SW1-2Automatic transmission (writing from the PT tothe Memory Unit)OFF: Not executedSW1 3SW1-3Manual transmission (Direction of transmissionand bank used selected at the PT touch panel)OFF: Not executedSW1-4Data type to transferON : ExecutedON : ExecutedON : ExecutedOFF: Screen dataON : Systemprogram• SW2Pin32FunctionSW2 1SW2-1Disable/enable writing to PTSW2 2SW2-2Disable/enable writing to the Memory UnitSW2 3SW2-3Area (bank) selection of automatic transmission.transmission *OFF: DisableON : EnableOFF: DisableON : EnableOFF: Bank 0ON : Bank 1SectionUsing a Memory UnitPinSW2 4SW2-43-5FunctionSystem/Screen simultaneous transmissionOFF: DisableON : Enable* The Memory Unit stores system program or screen data for one PT in each ofAreas (bank 0, bank 1).
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