PLC是以微處理器為基礎(chǔ)，綜合了計算機技術(shù)、自動控制技術(shù)和通信技術(shù)，用面向控制過程面向用戶的“自然語言”編程，適應(yīng)工業(yè)環(huán)境，簡單易懂、操作方便、可靠性高的新一代通用工業(yè)控制裝置。PLC是在繼電器順序控制基礎(chǔ)上發(fā)展起來的以微處理器為核心的通用自動控制裝置。
可編程序控制器是一種數(shù)字運算操作電子系統(tǒng)，專為在工業(yè)環(huán)境下應(yīng)用而設(shè)計。它采用了可編程序的存儲器，用來在其內(nèi)部存儲執(zhí)行邏輯運算、順序控制、定時、計數(shù)和算術(shù)運算等操作指令，并通過數(shù)字的、模擬的輸入和輸出，控制各種類型的機械或生產(chǎn)過程？删幊绦蚩刂破骷捌溆嘘P(guān)的外圍設(shè)備，都應(yīng)按易于與工業(yè)控制系統(tǒng)形成一個整體、易于擴充其功能的原則設(shè)計。
PLC產(chǎn)品種類繁多，其規(guī)格和性能也各不相同。對于PLC，通常根據(jù)其結(jié)構(gòu)形式的不同、功能的差異和I/O點數(shù)的多少等進行大致分類。
按結(jié)構(gòu)形式分類
根據(jù)PLC的結(jié)構(gòu)形式，可將PLC分為整體式和模塊式兩類。
整體式PLC
整體式PLC是將電源、CPU、I/O接口等部件都集中裝在一個機箱內(nèi)，如圖所示。具有結(jié)構(gòu)緊湊、體積小、價格低的特點。小型PLC一般采用這種整體式結(jié)構(gòu)。整體式PLC由不同I/O點數(shù)的基本單元（又稱主機）和擴展單元組成，基本單元內(nèi)有CPU、I/O接口、與I/O擴展單元相連的擴展口以及與編程器或EPROM寫入器相連的接口等；擴展單元內(nèi)只有I/O和電源等，而沒有CPU；締卧蛿U展單元之間一般用扁平電纜連接。整體式PLC一般還可配備特殊功能單元，如模擬量單元、位置控制單元等，使其功能得以擴展。
2）模塊式PLC
模塊式PLC將PLC的各組成部分分別做成若干個單獨的模塊，如CPU模塊、I/O模塊、電源模塊（有的含在CPU模塊中）以及各種功能模塊。模塊式PLC由框架或基板和各種模塊組成，模塊裝在框架或基板的插座上，如圖所示。這種模塊式PLC的特點是配置靈活，可根據(jù)需要選配不同規(guī)模的系統(tǒng)，而且裝配方便，便于擴展和維修。大、中型PLC一般采用模塊式結(jié)構(gòu)。
還有一些PLC將整體式和模塊式的特點結(jié)合起來，構(gòu)成所謂的疊裝式PLC。疊裝式PLC的CPU、電源、I/O接口等也是各自獨立的模塊，但它們之間是靠電纜進行連接的，并且各模塊可以一層層地疊裝。這樣，不但系統(tǒng)可以靈活配置，還可做得體積小巧。
2.2.按功能分類
根據(jù)PLC的功能不同，可將PLC分為低檔、中檔、。
（1）低檔PLC
低檔PLC具有邏輯運算、定時、計數(shù)、移位以及自診斷、監(jiān)控等基本功能，還可有少量模擬量輸入/輸出、算術(shù)運算、數(shù)據(jù)傳送和比較及通信等功能，主要用于邏輯控制、順序控制或少量模擬量控制的單機控制系統(tǒng)。
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FedEx /DHL ONE VEXTA RKD507-A
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Honeywell DDC controller XL20 CH/XL20CH WITH FAST SHIPPING
KOHZU MOTORED PRECISION TILTING STAGE SH07-01,VEXTA PK543-NA WORKING FREE SHIP
NEW Oriental Motor CSD5814N-P 5-Phase Stepper Driver Drive Japan
UDX5128N VEXTA stepper driver 60 days warranty
Vexta 2 Phase Stepping Motor PH299-02B
VEXTA 5-PHASE DRIVER UDK5107N PK543AW1-H50 STEPPING MOTOR HARMONIC REDUCER 50:1
VEXTA 5-PHASE DRIVER UDK5114NW2
VEXTA ASC46AK-T30 MOTOR & DRIVER / ASM46AK-T30 / ASD18B-K
Vexta C7810-9012K - Transf. Arm Z-Axis Motor 718.84461 - Siemens BN Prospec
Vexta DGM85R-ASAA Hollow Rotary Actuator P/N ASM46AA-D w/ASD13B-A DRIVE
VEXTA Servo Stepper motor ASM66AA-T7.2
VEXTA STEPPING MOTOR 5-PHASE PX533MH-B, CSD5807N-P DRIVE TESTED WORKING FREE
(2) ALLIANCE INJECTOR ASSEMBLIES PLC / LC - VEXTA PH265-04-C18 STEPPING MOTOR
(LOT OF 4) ORIENTAL MOTOR CO VEXTA STEPPING MOTOR PK564AU-TG30 5-PHASE
(NIB) VEXTA ASD12A-C/200-230V Closed Loop Stepper Motor Drive
(NIB) VEXTA BLESS DC MOTOR DRIVER BXD200A-C
(NIB) Vexta Servo Motor Pk569naw
(NIB) Oriental Motor Vexta stepping Motor ASM66AC & diver ASD12A-S
(NIB) Oriental Motor Vexta stepping Motor ASM66AC & diver ASD12A-S
(NIB) Oriental Vexta ASD24A-A Servo Motor Driver
(NIB) VEXTA ASD12A-C/200-230V Closed Loop Stepper Motor Drive
(NIB) VEXTA BLESS DC MOTOR DRIVER BXD200A-C
(NIB) Vexta Servo Motor Pk569naw
(USED) VEXTA SPG8800
**USED VEXTA PH266-01GK-C55 90days warranty Free DHL or EMS
**USED VEXTA PH266-01GK-C55 90days warranty via DHL or EMS
**USED VEXTA PK545NAW 90days warranty via DHL or EMS
**USED VEXTA PK545NAW 90days warranty
**USED VEXTA PK545NAW 90days warranty via DHL or EMS
**USED VEXTA PKE566BC 90days warranty
**USED VEXTA PKE566BC 90days warranty Free DHL or EMS
**USED VEXTA PKE566BC 90days warranty via DHL or EMS
**USED VEXTA Stepper motor ASM46AK
**USED VEXTA Stepper motor ASM46AK via DHL or EMS
**USED VEXTA Stepper motor ASM46AK via DHL or EMS 1
**USED VEXTA Stepper motor DGM60-ASAK Free DHL or EMS 1
**USED VEXTA Stepper motor DGM60-ASAK via DHL or EMS 1
*1 YEAR Warranty* - Customized Service - Fast Shipping
*NEW* VEXTA FBL5120AW-15 ORIENTAL MOTOR E55106A1 GEAR HEAD DRIVER SPEED CONTROL
*NEW* VEXTA FBL5120AW-15 ORIENTAL MOTOR E55106A1 GEAR HEAD DRIVER SPEED CONTROL
*NIB* VEXTA BLD30A-F BLESS DC MOTOR DRIVER
*NIB* VEXTA BLD30A-F BLESS DC MOTOR DRIVER
*Recertified* Matrox Odyssey XCL O10G5MDBCL* Y7108-04 010G5MDBCL* Warranty
*USED VEXTA PK545NBW-C30 Free DHL or EMS
*USED VEXTA PK545NBW-C30 via DHL or EMS
*USED VEXTA PK546PA Free DHL or EMS
*USED VEXTA PK546PA via DHL or EMS
*USED VEXTA PK545NBW-C30 Free DHL or EMS
*USED VEXTA PK545NBW-C30 via DHL or EMS
*USED VEXTA PK546PA Free DHL or EMS
*USED VEXTA PK546PA via DHL or EMS
[2UNIT] ORIENTAL VEXTA STEPPING MOTOR ARM24SAK-T10
[Lot Of 5] Oriental Motor Vexta Synchronous Motor Smk5100A-Aa Smk5100Aaa
[New Other] ORIENTAL VEXTA / BLFD60C2 / DC MOTOR DRIVE, Case breakage
[New Other] ORIENTAL VEXTA / BLFD60C2 / DC MOTOR DRIVE, Case breakage
[New Other] VEXTA / KBLM6180GD-CM / AC SERVO MOTOR, 180W
[New Other] VEXTA / KXPM5120-AB / AC SERVO MOTOR, 120W
[Used] ORIENTAL VEXTA / ASD12A-SSS / DRIVER, 1.5A
[Used] ORIENTAL VEXTA / PK564AN-TG7.2 / 5-Phase Steeping Motor
[Used] ORIENTAL VEXTA / PK569K-NACM / Stepping Motor
[Used] ORIENTAL VEXTA / UPH5913H-A / Stepping Motor
[Used] VEXTA / A4809-9215KE / 5-Phase Stepping Motor, DC 1.4A, 1.1?
[Used] VEXTA / A4934-9415KPGE / 5-Phase Stepping Motor, DC 1.4A, 2.3?, Dent
[Used] VEXTA / AF-MI-LG-1x-V2, PH265-01 / Actuator, Stepping Motor
[Used] VEXTA / ASM66AA-P10 / Stepping Motor
[Used] VEXTA / ASM66AC-P7.2 / Stepping Motor, DC 5.4V, 0.8A, 1pcs
[Used] VEXTA / EM569-NA / 5-Phase Stepping Motor, DC 1.4A, 2.1?, 1pcs
[Used] VEXTA / KBLM460GD-AM / AC SERVO MOTOR, 60W
[Used] VEXTA / KBLM6180GD-AM / AC SERVO MOTOR, 180W
[Used] VEXTA / KBLM6180GD-C 6GD30K / GEAR MOTOR
[Used] VEXTA / KXPD180-CBZ / AC SERVO DRIVER
[Used] VEXTA / PK596K-NACM / 5-Phase Stepping Motor, DC 1.4A, 1.5?
[Used] VEXTA / RKD507-A, PK543ABW-H50S / 5PH Motor, Drive Set
[Used] VEXTA / UDK5150 / 5-PHASE DRIVER
[Used] VEXTA / UPH566H-B2 / 5-Phase Stepping Motor, 1.4A, 2.26?
[Vexta] RK543AA-T7.2 Stepping Motor Set 5Phase 110V RKD507-A PK543AW-T7.2 NIB
? [7036] ORIENTALMOTOR/ VEXTA/ PK268M-E2.0B /??DHL shipping!
? [7036] ORIENTALMOTOR/ VEXTA/ PK268M-E2.0B /??DHL shipping!
?[1278] VEXTA PK299-03B / Fast Shipping!
?[1278] VEXTA PK299-03B / Fast Shipping!
?[10848] ORIENTAL MOTOR , VEXTA , ASM66AC-T20 , via DHL
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?[10863] ORIENTAL MOTOR , VEXTA , PK268M-E2.0B , via DHL
?[10878] ORIENTAL MOTOR , VEXTA, PK268M-E2.0B, via DHL
?[10879] ORIENTAL MOTOR , VEXTA, PK268M-E2.0B, via DHL
?[10880] ORIENTAL MOTOR , VEXTA, PK268M-E2.0B, via DHL
?[10881] ORIENTAL MOTOR , VEXTA, PK268M-E2.0B, via DHL
0040-52760 / LIFT TO CATHODE ADAPTER / APPLIED MATERIALS AMAT / VEXTA
1 AXIS ACTUATOR CARRY WITH VEXTA C7214-9015
1 AXIS ACTUATOR CARRY WITH VEXTA C7214-9015
1 condition ASM66MC good pcs VEXTA in tested servo Motor
1 PC Honeywell XCL5010 Controller Module In Good Condition
1 pc for the new VEXTA Oriental DRL42PB2G-04 stepper motor
1 pc for used VEXTA ASM69AC closed loop stepper motor
1 PC Honeywell XCL5010 Controller Module In Good Condition
1 PC new VEXTA MOTOR GFS4G30
1 pc NEW VEXTA Oriental Stepper Driver EZMC131-A
1 PC UDX5114 VEXTA stepper drive
1 PC USED ASD30A-A VEXTA stepper drive
1 PC Used HBLD25K VEXTA stepper driver
1 PC Used KBLD60-A VEXTA stepper driver
1 PC Used PK264A2-SG7.2 VEXTA stepper motor
1 PC Used UDK5114N VEXTA stepper driver
1 PC Used UI2120G VEXTA stepper driver
1 PC Used Vexta BXM460-GFH2 In Good Condition
1 PC Used Vexta KXPD30-CBZ In Good Condition
1 PC Used VEXTA PK569AE-A5
1 PC Used VEXTA Servo Motor ASM66MK-N5 In Good Condition
1 PC Vexta PK569BW Used
1 PC VEXTA PK599AW Motor Tested PK599AW
1 PC VEXTA Stepping motor ASM66AC-T7.2 Tested
1 pcs new VEXTA servo Motor ASM66AK-N10
1 pcs new VEXTA servo Motor ASM66AK-T7.2
1 pcs VEXTA Motor PH544-NB
1 pcs VEXTA Motor UPH596H-A tested
1 pcs VEXTA BXM5120-GFH2 motor
1 pcs VEXTA servo Motor ASM66AK-N10
1 pcs VEXTA servo Motor PK543AN-TG30 tested
1 pcs new VEXTA stepper motor ASM66AA
1 pcs new VEXTA stepper motor ASM66AA-H50
1 PCS NEW IN BOX VEXTA AXUD40C Governor
1 PCS NEW IN BOX VEXTA driver ARLD16A-C
1 PCS NEW IN BOX VEXTA driver BLHD15K
1 PCS NEW IN BOX VEXTA driver CMD2109P
1 PCS NEW IN BOX VEXTA driver CMD2112P
1 PCS NEW IN BOX VEXTA driver UDK2120
1 PCS NEW IN BOX VEXTA driver UDX5114
1 PCS NEW IN BOX VEXTA motor AXHM230K-GFH
1 PCS NEW VEXTA driver AXHD30K
1 PCS NEW VEXTA driver AXHD50K
1 pcs VEXTA Motor PH264-01 tested
1 pcs VEXTA Motor PK266-02A new in box
1 pcs VEXTA Motor PK266-E2.0A tested
1 pcs VEXTA Motor SD5114P new in box
1 pcs VEXTA ASM36AK servo motor tested
1 pcs VEXTA driver UDK2120 new in box
1 pcs VEXTA motor drive UDK5128N-M tested
1 pcs VEXTA Motor PK268-02B new in box
1 pcs VEXTA motor 5-phase UPH569-AM-M8 stepper motor DC1.4A tested
1 pcs VEXTA Oriental Motor ASM66AA Closed Loop Controller tested
1 pcs VEXTA Oriental Motor Brushless DC Motor BXM230-GFS GFS2G10 tested
1 PCS Vexta Oriental Motor BXD200A-A Driver Tested
1 pcs VEXTA Oriental Stepper Drive ASD16B-C tested
1 pcs VEXTA servo A5653-9215KTGM tested
1 pcs VEXTA servo ASM46MA new in box
1 pcs VEXTA servo ASM46MA ASM46MA tested ok
1 pcs VEXTA servo ASM46MA-H50 tested ok
1 pcs VEXTA servo ASM46MA-T3.6 tested ok
1 pcs VEXTA servo motor ARM911AC tested
1 pcs VEXTA servo motor ASM911BC tested
1 pcs VEXTA servo motor PK564AW-T10 tested
1 pcs VEXTA servo motor ASM66MA tested
1 pcs VEXTA servo motor ASM66MA-P10 tested
1 pcs VEXTA servo motor PK564AN-TG7.2 tested ok
1 pcs VEXTA servo motor PK569NAW tested
1 pcs VEXTA servo motor PK569NAW tested ok
1 pcs VEXTA servo Drive +ASD-C3 tested
1 pcs VEXTA servo Drive ASD24A-A new in box
1 pcs VEXTA servo Drive ASD24A-A-B1 tested
1 pcs VEXTA servo Drive ASD24C-A new in box
1 pcs VEXTA servo Drive DFU1514W-M tested
1 pcs VEXTA servo Motor ASM66AK tested
1 pcs VEXTA servo Motor PK564BW-T10 tested
1 pcs VEXTA servo Motor PK569AHW tested
1 pcs VEXTA servo Motor PK596H-NAC tested
1 pcs VEXTA servo Motor A6714-9015KHG tested
1 pcs VEXTA servo Motor ASM66AC-N36 tested
1 pcs VEXTA servo Motor ASM66MC tested
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