QDA-UPD-001模块QDA-UPD-001模块PLC点阵键盘在工控行业中，有时候会碰到因为可编程控制器（PLC）输入点的不够，而导致需要更换设备，浪费资源。对此，当实时性不需要那么高时，我们可以编写一个键盘的扫描程序来扩展输入的点数。因为扫描的方式是循环扫描，所以在实时性方面会有一定的欠缺。下面是用海为PLC编程软件编写的8乘6的48键扫描程序。需要用到8个输入点，6个输出点，硬件连接如下图所示：注：当要求实现组合按键时上图的二极管必须加，反之二极管可加可不加。扫描的点是令Y0~Y5循环输出，当有按钮按下时，就会做出相应的动作，例如：当按钮键0按下时，则X0接通，当程序扫描到Y0时，X0与Y0形成一个回路，表示按键“0”按下。程序如下图所示：结论：键盘是以循环扫描的方式来进行输入，而扫描的时间越短则实时性越好。但是当扫描时间过短时会因Y0~Y5输出结束时，X0仍未接通导致无法产生输出信号。或者当Y0输出结束，Y1也输出结束时，X0仍未断开，导致误判断。经过型号SW-S32ZS220T测试可知每次循环扫描的时间T0不得低于20ms。建议可将滤波时间设得短一点，则可以缩短每次循环扫描的时间T0，例如：本例中将滤波时间设为0.8ms，则每次循环扫描的时间T0可以设到***短10ms。(AB01)ACSERVODRIVERZ축DIRVERPANASONICMSDA041A1A07ASEABROWNBOVERIYB161101-***USPPYB161101***(AB01)DRIVER-ACSERVOPANASONICMATSUSHITAMSDA041A1A100V400W,400TexasInstruments(Siemens)Mdl:5TI-1082-2SequencerPanasonicKokusaiACServoDriveADKB400BPFADAworkingTexasInstruments500-5848SST5136-SD-104NSFP5136SD104(AS01)MSDA013A1APANASONICACSERVODRIVEUSEDWORKINGBARBERCOLMAN80EB-10003-002​-0-00USPP80EB1000300200​0ACCUSORT22NSPP22ASEABROWNBOVERIYT213001-ABUSPPYT213001ABASEABROWNBOVERIACS501-007-4-0​0P5USPPACS501007400P5SAJF//PANASONICMUMA042P1SACSERVOMOTORUSEDSiemensTexasInstruments555-1105PLCTEXASINSTRUMENTS5TI-1034-2USEDSEQUENCERMODULE5TI10342PanasonicACServoDriverMSDA041A1A100-115V400W(J)TEXASINSTRUMENTSPLC545-1104USPP5451104ITESIEMENSCED63B015LNSFPCED63B015LASEABROWNBOVERIYT212001-BR-YB​KA70-15USPPYT212001BRYBKA​70TEKTRONIX7603USPP7603TexasInstruments14SlotRackBase500-5848#23931TEXASINSTRUMENTSPLC500-5892NSPP5005892ASEABROWNBOVERIACS6010095000B​1200000USPPACS6010095000B​12PanasonicACServoDriveMBDHT2510ENewinBoxFreeShipPanasonicMSD023A1XXKACServoDriverTEXASINSTRUMENTSPLC530-1104USPP5301104PanasonicACServoMotorM***041A1FEFreeShipPanasonic/NaisServoMotorMFDDTB3A2NIB!TEXASINSTRUMENTSPLC505-4632USPP5054632TEXASINSTRUMENTSPLC505-6840NSPP5056840ASEABROWNBOVERIYB560103-ALUSPPYB560103ALPanasonicMUMA042A3E400WACServoMotorFreeShip(AB02)SPR200C-175-MPANASONICSERVODVIVERPANELLOADERROBOT-XUSEDWORKINGASEABROWNBOVERI069829-001USPP069829001EMCO301-MUSPP301M(AB01)ACSERVOMOTORPANASONICMATSUSHITAELECTRICMSD021A1XWORKINGPANASONICSERVODRIVERMEDDT7364L012.5KWELECTROCRAFT9101-2161USPP91012161ASEABROWNBOVERILSB-6-3-600-LU​M2USPPLSB63600LUM2ASEABROWNBOVERI57772158USPP57772158TEXASINSTRUMENTSPLC131547-007USPP131547007PanasonicMQMZ012A2UACSERVOMOTORNEWALLENBRADLEY1336F-BRF10-AA​-EN-HAS2-L9EUSPP1336FBRF10AAEN​HATEXASINSTRUMENTSPLC315-DC-DRUSPP315DCDRPanasonic2.5kWACServoDriverMDDA253A1ASAJF//PANASONICMAMA042P1EACSERVOMOTORUSEDASEABROWNBOVERIYT2120001-AZ-2USPPYT2120001AZ2PanasonicACServoMotorMHMA102P1G1kWJOHNSONCONTROLSNU-NCM200-0USPPNUNCM2000MITSUBISHIMR-J2S-500BUSPPMRJ2S500BROBERTSHAWDMS-350ACUSPPDMS350ACTexasInstrumentsVPU200-3102TEXASINSTRUMENTSPLC500-2151USPP5002151TexasInstruments500-5023TexasInstruments305-PROG575-2104TexasInstrumentsTISiemens5752104N3TexasInstrumentsProgramableControlerPLCM#305-02BTEXASINSTRUMENTSPLC305-04BUSPP30504BTEXASINSTRUMENT500-5039TIWAYNETWORKINTERFACENIB=TexasInstruments500-5007TEXASINSTRUMENTS5TII/0EXPANDER5TI-5500ASEABROWNBOVERI3HAB5957-1USPP3HAB59571TexasInstruments7MT400TEXASINSTRUMENTS505-6850-AUSPP5056850ATEXASINSTRUMENTSPLC505-6204USPP5056204COMPUMOTORPK-130HUSPPPK130HFANUCA06B-6058-H005USPPA06B6058H005Panasonic3.0kWACServoMotor***302D1C(freeshipping)PERCEPTRONCAMERADigitalCONTOURSENSOR916-4128ASEABROWNBOVERIYPP-110AUSPPYPP110ATEXASINSTRUMENTSPLC505-6408NSFP5056408ASEABROWNBOVERIEH550C-Q1NSPPEH550CQ1)