IC200ALG326模块IC200ALG326模块IC200ALG326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。PanasonicACServoDriverMSD083A1XXVTEXASINSTRUMENTSPLC7MT-300NSFP7MT300ALLENBRADLEY809-A21EUSPP809A21ETEXASINSTRUMENTSPLC505-4632NSFP5054632ASEABROWNBOVERILSB-6-3-600-LU​M2USPPLSB63600LUM2TexasInstruments500-2151DOLANJENNERSS950-32000USPPSS95032000ASEABROWNBOVERI1SDA054335R1USPP1SDA054335R1KEBCOMBIVERT14.F4.C1G-M280NSFP14F4C1GM280TEXASINSTRUMENTS500-2151-APOWERSUPPLY5002151AOnePanasonicACServoMotorMBMK042BLAFreeShipTEXASINSTRUMENTSPLC505-6108AUSPP5056108AKEBCOMBIVERT17.F4.F1H-4R01NSPP17F4F1H4R01PanasonicACServoMotorM***A102A1G1kW220VFreeShipOnePanasonicACServoDriverDV85018HA502TEXASINSTRUMENTSPLCPM550-C-112USPPPM550C112SIEMENS6FC5-203-0AB12​-0AA0USPP6FC52030AB120A​A0Perceptron495-0092PCBoardVMEgrapherVGAGraphicsRELIANCEELECTRICKC170105-7USPPKC17010577MT-1504TexasInstrumentsTIThermocouple7MT1504G309OMRONCV500-MC221USPPCV500MC221ASEABROWNBOVERIDSQC116USPPDSQC116ASEABROWNBOVERIACS601-0009-5-​000B1500800USPPACS60100095000​B1PanasonicServoDriverMADDT1207NewinBoxFreeShipWorldwideTEXASINSTRUMENTSPLC164-1114NSFP1641114PanasonicMatsushitaACSERVODRIVERMSD011P1EFreeShipASEABROWNBOVERINDCU-21CNSFPNDCU21CCTICRYOGENICS8112105NSPP8112105TEXASINSTRUMENTSPLC164-2113NSFP1642113ASEABROWNBOVERIAF460-30-11USPPAF4603011KTRON0671-30022USPP067130022HONEYWELLR7510A-1005USPPR7510A1005TITEXASINSTRUMENTS530-1104CONTROLLERPLCMODULEASEABROWNBOVERINF327-6PNSPPNF3276PTexasInstruments505-4632TEXASINSTRUMENTS500-5016ANALOGOUTPUTMODULE5005016TEXASINSTRUMENTSPLC505-4308USPP5054308KLOCKNERMOELLERDP-16DO/0.5A-P​KNSFPDP16DO05APKPANASONICM***022AJASERVOMOTORINBOXPanasonicACServodriveADKF50B5VD-200​W,100W,50W(J)SONICS&MATERIALSVC-130SUSPPVC130SOMRON3G2C3-CPUA1-EUSPP3G2C3CPUA1EASEABROWNBOVERI3BSE008546R1USPP3BSE008546R1ALLENBRADLEY1771-NT1USPP1771NT1TEXASINSTRUMENTSPLC505-4708NSFP5054708SIEMENS6ES5-482-4UA20NSFP6ES54824UA20NewPanasonicNachiFujikoshiServoMotorMFA220FYSBDBTEXASINSTRUMENTS500-5013OUTPUTMODULELOT5005013TEXASINSTRUMENTSPLC505-4232NSPP5054232PanasonicMDD153A1WACServoDrivePanasonicACServoMotorMHMD082G1U750WNewinBoxFreeShipTexasInstrumentsMP6000FUJIELECTRICFRN050G11S-2UXFNFPFRN050G11S2UXTexasInstruments305-PROGTEXASINSTRUMENTSPLC164-1114NSFP1641114TEXASINSTRUMENTSPLC500-5012NSPP5005012MITSUBISHILX6IC-BN624E25​2AUSPPLX6ICBN624E252​AOnePanasonicMSDA043D1AACServoDriverFreeShipPanasonicMADDT1105001ACServoASEABROWNBOVERIYT212001-USPPYT212001ASEABROWNBOVERID***B-127USPPD***B127ASEABROWNBOVERIYPQ-101EUSPPYPQ101ERELIANCEELECTRIC0-51419NSFP051419)