描述
PLC梯形图程序中的计数器的最高工作频率受扫描周期的限制,一般仅有几十Hz。在工业控制中,有时要求PLC有快速计数功能,计数脉冲可能来自旋转编码器、机械开关或电子开关。高速计数模块可以对几十kHz甚至上百Hz的脉冲计数,它们大多有一个或几个开关量输出点,计数器的当前值等于或大于预置值时,可通过中断程序及时地改变开关量输出的状态。这一过程与PLC的扫描过程无关,可以保证负载被及时驱动。
FX2N的高速计数模块FX2N–1HC有1个高速计数器,可作单相/双相50kHz的高速计数,用外部输入或通过PLC的程序,可使计数器复位或起动计数过程,它可与编码器相连。单相1输入和单相2输入时小于50kHz,双相输入时可设置为1倍频、2倍频和4倍频模式,计数频率分别为50kHz,25kHz和12.5kHz。计数值为32位有符号二进制数,或二进制16位无符号数(O~65535)。计数方式为自动加/减计数(1相2输入或2相输入时)或可选择加/减计数(1相1输入时)。可用硬件比较器实现设定值与计数值,一致时产生输出,或用软件比较器实现一致输出(最大延迟200µs)。它有两点NPN集电极开路输出,额定值为DC5~12V,0.5A。瞬时值、比较结果和出错状态均可监视,在程序中占8个I/O点。
欧美品牌停产的,常用的“PLC”备品备件
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4,《DCS集散控制系统》
5,《智能型消防供水控制系统》
6,《化工厂药液恒流量计算机控制系统》
7,《电气控制系统》造纸,印染生产线,变电站综合自动化控制系列
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C62291 Rucker&Kolls R&K 691 Automatic Wafer Prober
CT71086 Karl Suss Wafer Prober Probe Station w/Wild M3Z
K74410 GE LUNAR Prodigy 8743 Bone Densitometer Density
C59276 Orthodyne 20B Ultrasonic Large Wire Bonder
C69693 K&S 4129 Deep Access 90°Wedge Wire Bonder
C64901 K&S Kulicke Soffa 4126 Step-Back Wedge Bonder
C59003 K&S 4123 Manual Wedge Wire Bonder(Refurbished)
C58972 K&S 4123 Manual Wedge Wire Bonder(refurbished)
A73229 Beckman Coulter DU 800 UV/Vis Spectrophotomet?er
C69596 Westbond 7400A Deep Access Vertical Feed Bonder
C64574 HTG 84-3(350W)UV Lamp Mask Aligner w/Power Sup
G51906 Wentworth Labs.MP2000 8″Probe Station
C71219 Westbond 7416A Thermocompressi?on Ribbon Bonder
C59153 Electroglas 2001X Wafer Prober Probe Station
A69438 Applied Materials 8300 Plasma Etch Chamber/Parts
C68471 Signatone CAP-463 Computer Aided 6″Wafer Prober
C69868 Westbond 7416A Thermocompressi?on Wedge Bonder
C69867 Westbond 7700A Deep Access Ball&Wedge Bonder
C64997 Westbond 7416A Thermocompressi?on Wedge Bonder
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C70147 Westbond 7200B Pick&Place Epoxy Die Bonder
C70442 Westbond 7700A Ultrasonic Ball&Wedge Bonder
A52247 Inficon UL500 Dry Leybold,Anest Iwata Vac Pump
G53925 Olympus Measuring Microscope System
A72283(3)Tokyo Electron P-8XL Wafer Probers,P-8
C30694 Dage Microtester 22 Wire Shear/Pull Tester BT22
L70134 Kensington Zeiss Wafer Inspection Station
GE43031 Tesec 9210-IH Ambient/Hot IC Handler
GE43128 Tesec 9210-IH.T Ambient/Hot IC Handler
GE43127 Tesec 9210-IH/T Ambient/Hot IC Handler
GE43074 Tesec 9210-IH.T Ambient/Hot IC Handler
GE43073 Tesec 9210-IH Ambient/Hot IC Handler
C69771 Westbond 7316A Eutectic Mech.Scrub Die Bonder
C69694 Westbond 7316A Multiple-Collet Scrub Die Bonder
C69695 Westbond 7300A Eutectic Ultrasonic Die Bonder
C52697 Aetrium 5050S IC Handler for.208mil SSOP
C50941 Electroglas Horizon 4085X Automatic 8″Prober
A55030 Boc Edwards QMB250F Booster w QDP40 Dry Pump
A55032 Boc Edwards QMB250F Booster w/QDP40 Pump
A55031 Boc Edwards QDP40 Vacuum Pump w QMB250F Booster
A59162(2)Credence SC212 Micro Tester System
G69672 K&S(Kulicke&Soffa)1471 Automatic Wire Bonder
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C69225 Mech-El 990 Vertical Feed Wedge Wire Bonder
A24760 SRT MP1000F-IR Chip Bonder/Rework Station,PCB
A24698 Wentworth Laboratories MP2010 Manual Prober,8″
C71102 Alessi REL-4100A 8″Wafer Prober/Probe Station
C52699 Seiko Epson HM-3500 High Speed IC Handler
C52690 Synax SX1201 Pick&Place IC Handler
C71103 Wyko MHT Magnetic Head Tester w/Multi-Axis Stage
A73253 Groton Biosystems Automated Sampling System,ARS
A73252 Packard Topcount NXT Scintillation Counter
A69803 Sonix HS1000 Ultrasonic Microscope HS-1000
G73927 HP G1315A DAD Diode-Array Detector
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A60694 Varian 3400 w/Finnigan Mass Spectrometer
A59351 Nanotech 380FDCR Lapping Machine
C30414 K&S(Kulicke&Soffa)1484 Automatic Wire Bonder