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与PC机发展太快相比，PLC产品可长期供货，长期提供技术支持。
PLC在工厂自动化中的地位之所以如此稳固，原因在于：
PLC的技术具有长期的稳定性，软硬件均应用方便，即插即用，价格适中，堪称工业控制的适用技术。
可以说当今工业控制所要求的性能，PLC可满足85%至90%。其不足部分可用其它办法补充。近几年来PLC也在不断提高其技术内涵，融合了IT技术（包括以太网，因特网，无线网技术，现场总线技术，以及运用软件工程方法提升PLC的编程语言，开发全新的编程系统，等等）。
PLC在开放性方面也有了实质性的突破。**多年PLC被攻击的一个重要方面就是它的专有性，现在有了较大的改观。PLC采用了各种工业标准，如IEC 61131，IEEE802.3以太网，TCP/IP，UDP/IP等，各种事实上的工业标准，如Windows NT，OPC等。
PLC在硬件上也有长足进步。微电子技术的进展全都运用到PLC中，元器件的集成度越来越高，促使PLC成本下降和可靠性提高。专为PLC的设计的PLC-on-a-chip芯片业已问世多年。PLC的产品在体系结构和操作系统上都有了质的变化,性能大幅提高。一个机架上可装多个模块。也出现了以Web为基础的PLC系列产品。
PLC、软PLC、IEC 61131在中国的未来
传统的PLC制造业不会在可预见的未来在国内建立和发展。但不排除软PLC在近期和可预见的未来，完全有可能在国内形成一定的气候。软PLC的I/O完全可以利用主流及一些有生命力的现场总线的系列产品。强实时操作系统可采用Windows CE，NTE，VenturCom的RTX以及其它；只要它们能实现控制的时间确定性，即保证能以时间高度一致的方式执行控制指令序列，并具有可预测的结果或行为。加入WTO以后，中国成为"世界制造工厂"的进程正在加速。我们有足够的理由相信，PLC、软PLC在中国的销售的年增长率会显著**世界的平均年增长率。因此，对PLC、软PLC以及IEC 61131的推广应用，特别是高水平的技术支持变得十分重要。
SAMES TRP 500 N 3274 VA SELECTRO FINISHING SPRAYER
RACINE PVF SNT0 12ER 01 VANE PUMP
AIR FIXTURES AFAT 822-SPL AIR OPERATED TAPE DISPENSER
FANUC A02B-0118-C043 DPL/MDI POWER MATE PANEL W/ CABLE
FANUC A02B-0118-C033 DPL/MDI POWER MATE PROGRAM PANEL
INDRAMAT HDS03.2-W100N-HS12-01-F DRIVE CONTROLLER
TURCK RK 4T-4 EUROFAST APPEARS
ENDRESS HAUSER DB 51A HYDROSTRATIC LEVEL MEASUREMENT
COOPER CROUSE-HINDS CHDN-EAE-D2 CABLE NEW
TURCK BI2-Q12-RZ31 CABLE NEW
TURCK CSM CKM 12-12-6/S101MULTIFAST CABLE NEW
ALLEN BRADLEY 700-P1200A1 AC RELAYS, LOT OF 3
INDRAMAT LE5-024 AUXILIARY FAN
INDRAMAT NAM 1.3-08 LINE FORMER
ITC LR 106309 Fuse Holder LOT OF 12
FANUC IC693MDL645E MODULE
CAMCO EMERSON MIC8207-B ACM MODULE
RELIANCE ELECTRIC 34G601 P TO E TRANSDUCER, NIB
ITT CONOFLOW COMMANDAIRE MODEL 34 POSITIONER
GESTRA LRG 16-1 CONDUCTIVITY ELECTRODE
DIGI-DOG DIGTALLY PROGRAMMABLE ROTARY LIMIT SWITCH
MODICON AEG AS-B350-001 OUTPUT MODULE
SQUARE D SL-1 8854 PLUG-IN LOGIC MODULE
CUTLER HAMMER D2PA4 RELAY LOT OF 5 NIB
ALLEN BRADLEY 1771-IK ENCODER / COUNTER MODULE !!NICE!!
FOXBORO L0119RU-9 BOARD
FIFE 44-10193-001 PC BOARD
ALLEN BRADLEY 1764-24BWA MicroLogix 1500 BASE UNIT
INDRAMAT TDM1.2-100-300-W1-115 AC SERVO CONTROLLER
INDRAMAT TDM1.2-30-300-W0 SERVO CONTROLLER
20th CENTURY 23" O.A.L. TRAVEL 14" BALL SCREW
20th CENTURY A-462 BALL SCREW
CUTLER-HAMMER AF93AG0C002D AC DRIVE W/ OTHERS
INDRAMAT TVM 2.1-050-W1-115V AC SERVO POWER SUPPLY
INDRAMAT TBM 1.2-40-W1-115 AC SERVO BLEEDER
TOTAL CONTROL SYSTEMS 682-15AF2BX 4" METERING PUMP
TOTAL CONTROL SYSTEMS 682-15AF2BX 4" METERING PUMP
SUTRON TP35NC/066032 OPERATOR INTERFACE PANEL
TROMBETTA D515-A12 SOLENOID
TEKTRONIX A6902A ISOLATOR W/ PROBES & MANUAL
DODGE 56WM16B GEARMOTOR, NNB
SIEMENS 6EV 3054-06C PCB
TORITU 57-1 AND OTHER BAND HEATERS, LOT OF 5
GROVE GEAR BMQ218-2 GEARMOTOR, NNB
DAYTON HL 121A-0102 FAN, NNB
MCLEAN MIDWEST HE-1116-005 HEAT EXCHANGER, NEW+
ALLEN BRADLEY 849-Z0D321 PNEUMATIC TIMING RELAY
MITSUBISHI ELECTRIC SF-JRV SUPER LINE INDUCTION MOTOR
GE DP4HC01EDST DOWN ELBOW POWER BUSWAY
SMC FH44-24-200-P020 HYDRAULIC FILTER NEW LOT OF 2
7" FLANGE 65 MESH Y STRAINER
FUTABA FP10NB PULSCALE FP
SIEMENS 6FX1120-6C001 MEMORY MODULE
DELTRONIC PLUG GAUGES, LOT OF 24, IN CASE
FANUC AOA12F A03B-0807-C159 OUTPUT MODULE
FANUC AOA08E A03B-0807-C158 OUPUT MODULE
CINCINNATI MILACRON 3-531-3911A DC MOTOR MODULE
SIEMENS 6FX1122-3CA01 DIGITAL I/O BOARD
KUKA BMC30/135Kb 69-350-075 SERVO DRIVE
SIEMENS 3SB02-SM20 PUSHBUTTON STATION NIB
ALCO CONTROLS XB1019HW100-3B POWER ASSEMBLY
KUKA FN006 69-334-006 POWER SUPPLY
VISOLUX L6/LK6-GA LIGHT BARRIER NIB
SQUARE D 30527-057-50 DC FIRING PANEL
LIMITRON JKS-3 CURRENT-LIMITING FUSE LOT OF 3
JOHNSON CONTROLS P100EE-1 SENSOR
SERVICE FIRST CPT00975 CAPACITOR NIB
ASHCROFT LTSN4G05A7030 TRANSIMITTER
LINCOLN 86217 GLAND PROTECTION SLEEVE, LOT OF 3, NIB
SUPER-TREX 84660 QUICK CONNECT MALE RECPTACLE, LOT 13
MODICON NW-RR85-001 REPEATER / MODBUS PLUS
MODICON NW-BP85-000 BRIDGE / MODBUS PLUS
SIMPSON 2865 DIGIT PANEL METER
SQUARE D 9007AW16 LIMIT SWITCH
MODICON NW-RR85-000 REPEATER / MODBUS PLUS
MODICON NW-BP85-002 BRIDGE / MODBUS PLUS
YOKOGAWA 2353 AC AMPERES METER
BANNER RS-11 RELAY SOCKET MODULE, LOT 8
BK PRECISION 1601 REGULATED DC POWER SUPPLY
ALLEN BRADLEY 1771-OD16 A ISOLATED AC OUTPUT MODULE
SERVICE FIRST CNT01405 CONTROL TEMP. OPEN, CLOSE SPST
EFECTOR IG6051 INDUCTIVE PROXIMITY SWITCH NIB
CUTLER-HAMMER E57MAL18A2E PROXIMITY SWITCH
BUSS R25030-3PR FUSEHOLDER
BUSSMAN FRN-R-80 TIME-DELAY FUSES LOT OF 4 NIB
TEKELEK CDS-80 80A FUSETEK NEW LOT OF 2
CEFCO OT6/250 6 AMPS FUSES LOT OF 3
UNITED ELECTRIC J21KX 140 PRESSURE SWITCH NIB
ALLEN BRADLEY 2361-SPM02A GATE INTERFACE BOARD NIB
STI OS-1 BBS MODULE NEW LOT OF 8
ALLEN BRADLEY 42GRU-9203H PHOTOSWITCH
NYE TOOL 51 B 1" TO 2" ADJUSTABLE DIE
SIEMENS 1LA3073-4AB91 0,43KW MOTOR
SIEMENS 1LA5079-2AA93-Z .48KW MOTOR
ORIENTAL MOTOR 4IK25GN-AWT INDUCTION MOTOR, NNB
ALLEN BRADLEY 1778-OAC AC OUTPUT MODULE
TR ELECTRONICS STE-68 SERVO MOTOR
MS-H50 COMPACT SWITCHING POWER SUPPLY
ADVANCE RSM-175-S-TP SLIMLINE BALLAST NIB
ADVANCE VC-2S85-TP RAPID START BALLAST NIB
VALMONT ELECTRIC 8G1028WF RAPID START BALLAST NIB
SYLVANIA MB2X40/120 RS MAGNETIC BALLAST NEW
ADVANCE REL-2P60-S INSTANT-START ELECTRONIC BALLAST NIB
VALMONT ELECTRIC 8G1148W RAPID START BALLAST
SIEMENS 3RT1044-1BB40 SIRIUS CONTACTOR
GRACO 220 395 DIS**CEMENT PUMP REPAIR KIT, NEW
ERDCO 3464-08T5 WATER ARMOR-FLO WATER METER, NNB
NORDSON 239819E SPARE PART KIT, NIB
**ST 4482 FM FAN
TURCK PKW 3M-6/S90 PICOFAST CABLE NEW
TURCK BI 2-CRS260-AP4X2-H1141/S34 PROXIMITY SWITCH NEW
TURCK PKG 3M-2/S90 PICOFAST CABLE NEW LOT OF 2
SQUARE D ARC-13 30 AMP DISC SWITCH NIB
ALLEN BRADLEY 700-RTA / 700-RTA00V000A1 RELAY
NEC NL6448AC33-59D 10.4" FLAT PANEL DIS**Y
S. HIMMELSTEIN 6-201 TRANSDUCER AMPLIFIER
SCHAFFNER FS5113-50-53 EMC FILTER
ACE CONTROLS MA 6450 INDUSTRIAL SHOCK ABSORBER NIB
HONEYWELL V5011G 1194 1 2-WAY SINGLE SEATED STEAM VALVE
KINETROL 059-404EL0000M VANE ACTUATOR & FILTER 1/4" NIB
GAST DAA-V141-GB VACUUM PUMP 115 VOLT 5.5 AMP
SANYO ELECTRIC C-Q40L6C HERMETIC COMPRESSOR NIB
TURCK WKM 36-10M MINIFAST 3-WIRE CORDSET 600V 9A NEW
IPC AUTOMATION 910-8070-001 MICROWATCH ALARM PROCESSOR
ALLEN BRADLEY 1771-A3B1 12 SLOT I/O CHASSIS
MASS-TRON II 2 MASS FLOW TRANSMITTER 24 VAC/DC
INVENSYS 043 SERVICE REGULATOR, NIB
ALLEN BRADLEY 1756-CNB/D F/W REV 5.22 ControlNet MODULE
ALLEN BRADLEY 1756-CNB/A REV B01 F/W 1.14 ControlNet
ALLEN BRADLEY 1756-CNB/B REV C01 F/W 2.24 ControlNet
ALLEN BRADLEY 1756-DNB/B F/W Rev 7.002 DeviceNet MODULE
ALLEN BRADLEY 1756-ENET/A REV H01 F/W 1.18 ETHERNET
ALLEN BRADLEY 1756-ENET/A REV K01 F/W 1.18 ETHERNET
ALLEN BRADLEY 1756-CNB/A REV C01 F/W 1.19 ControlNet
ALLEN BRADLEY 1756-DNB/A F/W 3.3 REV F01 DeviceNet
ALLEN BRADLEY 1756-DNB/B F/W Rev 6.002 DeviceNet MODULE