福建中立恒自动化设备有限公司
一、摘要 PLC是一种专门在工业环境下应用而设计的数字运算操作的电子装置。
它采用可以编制程序的存储器,用来在其内部存储执行逻辑运算、顺序运算、计时、计数和算术运算等操作的指令,并能通过数字式或模拟式的输入和输出,控制各种类型的机械或生产过程。PLC及其有关的外围设备都应按照易于与工业控制系统形成一个整体,易于扩展其功能的原则而设计。在工业生产的各个领域,机械加工企业为了提高生产效率,采用机械化流水作业的方式,对不同类型的零件分别组成的自动生产线。随着产品机型的更新换代,生产线承担的加工对象也随之改变,这就需要改变控制程序,使生产线的机械设备按新的工艺过程运行,而继电接触器控制器系统是采用固定接线,很难适应这个要求。大型自动生产线的控制系统使用的继电器数量很多,随着PLC的应用日益普及,其使用方法简单,便于掌握,且可靠性,抗干扰性很强,自身具有完善的功能.模块化的结构,使其在工业生产线上的应用越来越广泛。
发展趋势:1.向高速度、大容量方向发展
为了提高PLC的处理能力,要求PLC具有的响应速度和更大的存储容量。目前,有的PLC的扫描速度可达0.1ms/k步左右。PLC的扫描速度已成为很重要的一个性能指标。
在存储容量方面,有的PLC可达几十兆字节。为了扩大存储容量,有的公司已使用了磁泡存储器或硬盘。
2.向超大型、超小型两个方向发展
当前中小型PLC比较多,为了适应市场的多种需要,今后PLC要向多品种方向发展,特别是向超大型和超小型两个方向发展。现已有I/O点数达14336点的超大型PLC,其使用32位微处理器,多CPU并行工作和大容量存储器,功能强。
INK SYSTEMS 25015 INTERFACE BOARD 25015B
INLAND MOTOR C-78178-1 RAMP GENERATOR BOARD C781781
INLAND MOTOR C-78178-1 RAMP GENERATOR BOARD C781781
INLAND MOTOR C-78530-3 POWER SUPPLY BOARD C785303
INLAND MOTOR C-78530-3 POWER SUPPLY BOARD C785303
INLAND MOTOR CO. C-78166-0 PULSE GENERATOR BOARD C781660
INLAND MOTOR CO. C-78166-0 PULSE GENERATOR BOARD C781660
INLAND MOTOR CORP. EM-0-00 INTERLOCK AND BRAKE BOARD 16-8B-134, 33526-3
INLAND MOTOR CORP. EM-0-00 INTERLOCK AND BRAKE BOARD 16-8B-134, 33526-3
INLAND MOTORS C-78354 SUPPRESSION CARD C78354
INLAND MOTORS C-78354 SUPPRESSION CARD C78354
INNOVATIVE INTEGRATION PC32 PROCESSOR BOARD
INNOVATIVE INTEGRATION PC32 PROCESSOR BOARD
INNOVATIVE INTEGRATION PC32 PROCESSOR BOARD
INNOVATIVE INTEGRATION PC32 PROCESSOR BOARD
INNOVATIVE INTEGRATION PC32 PROCESSOR BOARD
INNOVATIVE INTEGRATION PC32 PROCESSOR BOARD
INTEL 144929-002 PROCESSOR BOARD 144929002
INTEL 144929-002 PROCESSOR BOARD 144929002
INTEL 44A295191-004 C CIRCUIT CARD 44A295191004
INTEL 44A295191-004 C CIRCUIT CARD 44A295191004
INTEL 717622-003 PC BOARD 717622003
INTEL 717622-003 PC BOARD 717622003
INTEL PBA 511337-002 CIRCUIT BOARD SBC 300SX00, PBA511337002
INTEL PBA 511337-002 CIRCUIT BOARD SBC 300SX00, PBA511337002
INTEL PBA 511337-002 CIRCUIT BOARD SBC 300SX00, PBA511337002
INTEL PBA 511337-002 CIRCUIT BOARD SBC 300SX00, PBA511337002
INTEL PBA 511337-002 CIRCUIT BOARD SBC 300SX00, PBA511337002
INTEL PBA 511337-002 CIRCUIT BOARD SBC 300SX00, PBA511337002
INTEL PBA146040-001 CIRCUIT BOARD 7380A29G03 PBA146040001 SBX 351
INTEL PBA146040-001 CIRCUIT BOARD 7380A29G03 PBA146040001 SBX 351
INTEL PBA146040-001 CIRCUIT BOARD 7380A29G03 PBA146040001 SBX 351
INTEL PBA146040-001 CIRCUIT BOARD 7380A29G03 PBA146040001 SBX 351
INTEL PWA-142722-009-H-FJ CIRCUIT BOARD PWA142722009HFJ
INTEL PWA-142722-009-H-FJ CIRCUIT BOARD PWA142722009HFJ
INTEL S3210SH SERVER BOARD
INTEL S3210SH SERVER BOARD
INTEL S5000PSL SERVER BOARD CPU-S5000SL
INTEL S5000PSL SERVER BOARD CPU-S5000SL
INTERIM CK-STD4030E PC BOARD 4030E CKSTD4030E
INTERIM CK-STD4030E PC BOARD 4030E CKSTD4030E
INTERIM TECHNOLOGY CK-STD4040E PC BOARD CKSTD4040E REV C
INTERIM TECHNOLOGY CK-STD4040E PC BOARD CKSTD4040E REV C
INTERIM TECHNOLOGY CK-STD4080 CPU CONTROL BOARD STD68B09 CKSTD4080
INTERIM TECHNOLOGY CK-STD4080 CPU CONTROL BOARD STD68B09 CKSTD4080
INTERIM TECHNOLOGY ISA4060F PC BOARD REV.B
INTERIM TECHNOLOGY ISA4060F PC BOARD REV.B
INTERIM TECHNOLOGY STD4000E PRINTER INTERFACE BOARD
INTERIM TECHNOLOGY STD4000E PRINTER INTERFACE BOARD
INTERIM TECHNOLOGY STD4000E PRINTER INTERFACE BOARD
INTERIM TECHNOLOGY STD4000E PRINTER INTERFACE BOARD
INTERLOCK A78771-2 PC BOARD A787712
INTERLOCK A78771-2 PC BOARD A787712
INTERM TECHNOLOGY VME5000 TRANSITION BOARD TYPE 105 REV B
INTERM TECHNOLOGY VME5000 TRANSITION BOARD TYPE 105 REV B
INTERSIL 30-00348-01 CIRCUIT CARD 300034801
INTERSIL 30-00348-01 CIRCUIT CARD 300034801
INTERSWITCHING PROCESSOR BOARD
INTERSWITCHING PROCESSOR BOARD
INTERSWITCHING PROCESSOR BOARD
INTERSWITCHING PROCESSOR BOARD
INTRINSIC SAFE CIRCUITS PWB 9150064-133P LIZ PCB / FAST BY DHL & FEDEX
INTRINSIC SAFE CIRCUITS PWB 9150064-133P LIZ PCB / FAST BY DHL & FEDEX
INVENSYS ENERGY 350-00076-76B RECTIFIER MODULE PCB CARD LVD100-10COM
INVENSYS ENERGY 350-00076-76B RECTIFIER MODULE PCB CARD LVD100-10COM
INVENSYS ENERGY BPMS30-A53/A55 RECTIFIER MODULE PCB CARD 350-00080-13G
INVENSYS ENERGY BPMS30-A53/A55 RECTIFIER MODULE PCB CARD 350-00080-13G
INVENSYS ENERGY SM30-00 LCD DISPLAY 350-00076-38A PCB CARD 350-00076-91A
INVENSYS ENERGY SM30-00 LCD DISPLAY 350-00076-38A PCB CARD 350-00076-91A
IONICS INSTRUMENTS 74500 CONTROL BOARD EPC-74500 ATP-74500
IONICS INSTRUMENTS 74500 CONTROL BOARD EPC-74500 ATP-74500
IPC-B-08PR CIRCUIT BOARD IPCB08PR
IPC-B-08PR CIRCUIT BOARD IPCB08PR
IRD MECHANALYSIS 32996 PC BOARD
IRD MECHANALYSIS 32996 PC BOARD
IRD MECHANALYSIS 34176 PC BOARD
IRD MECHANALYSIS 34176 PC BOARD
IRIS A513 PC BOARD
IRIS A513 PC BOARD
IRIS D504 FLAME FAILURE BOARD REV. B
IRIS D504 FLAME FAILURE BOARD REV. B
ISHIDA P-5155B CIRCUIT BOARD P5155B
ISHIDA P-5155B CIRCUIT BOARD P5155B
ISHIDA P-5159B PC BOARD P5159B
ISHIDA P-5159B PC BOARD P5159B
ISHIDA P-5161D SIGNAL IF BOARD P5161D
ISHIDA P-5161D SIGNAL IF BOARD P5161D
ISHIDA P-5161D SIGNAL IF BOARD P5161D
ISHIDA P-5161D SIGNAL IF BOARD P5161D
ISHIDA P-5162B INTERFACE CARD P5162B
ISHIDA P-5162B INTERFACE CARD P5162B
ISHIDA P-5166A KEYPAD BOARD P5166A
ISHIDA P-5166A KEYPAD BOARD P5166A
ISHIDA P-5166A KEYPAD BOARD P5166A
ISHIDA P-5166A KEYPAD BOARD P5166A
ISHIDA P-5166A KEYPAD BOARD P5166A
ISHIDA P-5166A KEYPAD BOARD P5166A
ISHIDA P-5186B CIRCUIT BOARD P5186B
ISHIDA P-5186B CIRCUIT BOARD P5186B
ISHIDA P-5186B CIRCUIT BOARD P5186B
ISHIDA P-5186B CIRCUIT BOARD P5186B
ISHIDA P-5243 MODULE PCB BOARD P5243
ISHIDA P-5243 MODULE PCB BOARD P5243
ISHIDA P-5243 MODULE PCB BOARD P5243
ISHIDA P-5243 MODULE PCB BOARD P5243
ISHIDA P-5280A WCU BOARD P5280A
ISHIDA P-5280A WCU BOARD P5280A
ISHIDA P-5280A WCU BOARD P5280A
ISHIDA P-5280A WCU BOARD P5280A
ISHIDA P-5280A WCU BOARD P5280A
ISHIDA P-5280A WCU BOARD P5280A
ISHIDA P-5280A WCU BOARD P5280A
ISHIDA P-5280A WCU BOARD P5280A
ISHIDA P-5287D2 DUC BOARD P5287D2
ISHIDA P-5287D2 DUC BOARD P5287D2
ISHIDA P-5287D2 DUC BOARD P5287D2
ISHIDA P-5287D2 DUC BOARD P5287D2
ISHIDA P-5287D2 DUC BOARD P5287D2
ISHIDA P-5287D2 DUC BOARD P5287D2
ISHIDA P-5289A FUSE BOARD P5289A
ISHIDA P-5289A FUSE BOARD P5289A
ISHIDA P-5290A FUSE BOARD P5290A
ISHIDA P-5290A FUSE BOARD P5290A
ISHIDA P-5294 CONTROL CARD SCALE DRIVE UNIT B018-1259-09 P5294
ISHIDA P-5294 CONTROL CARD SCALE DRIVE UNIT B018-1259-09 P5294
ISHIDA P-529IA PC BOARD W/FUSE HOLDER P529IA
ISHIDA P-529IA PC BOARD W/FUSE HOLDER P529IA
ISHIDA P-529IA PC BOARD W/FUSE HOLDER P529IA
ISHIDA P-529IA PC BOARD W/FUSE HOLDER P529IA
ISHIDA P-5375A MOTHER BOARD P5375A
ISHIDA P-5375A MOTHER BOARD P5375A
ISHIDA P-5375A MOTHER BOARD P5375A
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