早期的PLC只是可以完成逻辑控制而已，但是芯片和电子技术发展非常快速，PLC增加了模拟量处理功能，可以直接读取传感器的模拟量数据，这样可以用来做一些数据采集和监控，如果这些数据用来控制变频器等装置，又可以实现了一些闭环目标控制。
而且PLC里边设计出了计数器和计时器，这样避免使用麻烦的实物计时器和时间继电器，修改计数和计时值非常快捷方便，把以往传统继电器很难实现的时序逻辑控制做得非常精准。甚至有些老板担心客户不给钱，使用万年历设定一个时钟，运行到某年某月某日某时某分某秒，自动会停下部分功能来。
电子技术发展起来了，单板机出现了，后来人们尝试使用单板机来替代继电器电路，结果很复杂的逻辑，只要集成在一块板子上就可以满足功能要求了。所以工业电气系统能实现更复杂的逻辑控制，体积又小，维护起来比继电器容易多了。但是单板机可靠性不行，工业场所需要抗干扰很强，粉尘和震动也很厉害，而且使用汇编语言编程，一般电工都学不会。单片机出来以后，单板机的功能基本上集成到一块芯片上，所以有家叫莫迪康的公司设计了PLC这款产品出来了，硬件考虑了工业场所要求，处理比较稳定可靠，然后软件根据电工的思维习惯，弄出了一套梯形图编程的系统来，和线下的继电器电路差不多，这样通过电脑上“接线”，用符合来替代实物，就可以实现“软”方法来修改逻辑电路了。
LAM 839-350005-002 WELDMENT HE EVAC LWR MTCH BOX
LAM 839-350018-002-E3 GAS LINE
LAM 839-350038-910 WELDMENT
LAM 839-350039-910 WLDMT,BLST,ENTR LL,ESC
LAM 839-35704-001 GAP CHAIN ALR (PACK OF 10)
LAM 839-360034-001-D GAS LINE
LAM 839-360111-002-B GAS LINE
LAM 839-360247-002 ASSY,RGHG BYP,UNIV,HTD
LAM 839-410222-001-E1 GAS LINE
LAM 839-410222-03-A GAS LINE
LAM 839-440462-108 ELECTRODE, ESC 9100
LAM 839-441891-001-A GAS LINE
LAM 839-442002-001-A GAS LINE
LAM 839-460424-001-A CONNECTOR, FOR GAS LINE
LAM 839-470007-100-A GAS LINE
LAM 839-470479-002-A GAS LINE
LAM 839-470876-020 HOSE, METAL FLEX
LAM 839-480190-001-B GAS LINE
LAM 839-482179-001 DIFFUSER 0.2u NW50
LAM 839-482254-001 WLDMT,MANF,VLV,VCE
LAM 839-495013-001 LINER, CHAMBER, VAT65 TRNSN MANF
LAM 839-495013-001 LINER, CHAMBER, VAT65 TRNSN MANF
LAM 839-5010502-100 ESC PLASMA COAT
LAM 839-800728-003 WLDMNT,HE VALVES,LONG
LAM 839-L011520-001 CYLINDER, AIR
LAM 839-S075575-001-01 THERMO COUPLE
LAM 840-009865-080 KIT, VALVE, REPAIR, HPS, CHAM
LAM 841-005728-003 TEFLON SEAL
LAM 841-010299-446 ASSYCOURT WAFER TRANS
LAM 846-029194-001 KIT, EMO
LAM 846-029349-001 KIT RETROFIT NW25 RGAPORT
LAM 846-029901-002 KIT QD BOX ASSY LOW TEMP
LAM 849-020335-001 KIT, QRTLY, P.M. EXT L.L
LAM 849-020338-001 KIT ANN PM LOAD 4520
LAM 849-020354-001 KIT, QRTLY, P.M. ENT L.L
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LAM 849-095858-001 KIT, PREVENTITIVE MAINT
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LAM 849-210029-001 KIT, QRTLY, P.M., CHAMBER 4420
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LAM 849-210034-001 KIT ANN PM TCU
LAM 849-510317-001 KIT,QTRLY,PVNT MAIN,9600PTX CE
LAM 851-8226-008 PCB, 4 AXIS COUNTER
LAM 852-11060-002 ASSY HOUSING UPPER REAC CHAM
LAM 852-11302-0 VALVE, PNUE, NC, 3/32 ORF, 1/8 FPT-TPM, MACE
LAM 852-210010-003 CHAMBER BODY
LAM 852-222296-600 ASSY, VME CD CG, STD, ENVSN AL
LAM 853-000358-001 CRT HOUSING
LAM 853-000577-001 ASM PHASE & MAG DETECTOR 490 N/C
LAM 853-000886-001 HARNESS GAS PANEL
LAM 853-001154-006 ASM EXIT ARM 3" 490
LAM 853-001154-008 AEM, EXIT, 6"
LAM 853-001198-004 GATE DELRIN INNER ASSM
LAM 853-001320-001 CABLE RECIPE MOD ASY
LAM 853-001412-002 CABLE BNC LONG
LAM 853-002371-001 FAN MATCHBOX
LAM 853-002499-002 ASSY,VOLTAGE DETECTOR,ESC,2300
LAM 853-002751-001 POWER, SUPPLY, 5V
LAM 853-002751-001 POWER, SUPPLY, 5V
LAM 853-003607-001 CA,ASSY,HARN,BP,INT
LAM 853-004070-001 HARNESS LIFTER
LAM 853-004093-001 ASSY MOTOR DRIVE BELT
LAM 853-004093-001 ASSY MOTOR DRIVE BELT
LAM 853-004197-001 VALVE, DELAY, BALLAST
LAM 853-004359-001 HARN,MARK 01
LAM 853-005949-002 ASSY, PLL END POINT DETECTOR
LAM 853-006037-001 ASSY CHAMBER BATTOM
LAM 853-006103-001 CABLE, ID ROM ADAPTER
LAM 853-006613-001 ASM EXIT UNLOAD LIFTER LAM 490
LAM 853-008389-002 LIFTER ANODE ASSY
LAM 853-008580-001 HARNESS ASSY MATCH CONTROL
LAM 853-00886-001 HARNESS ASSY GAS BOX
LAM 853-009535-002 ASSY, CHAMBER FRONT
LAM 853-009536-002 ASSY CHAMBER REAR
LAM 853-011053-002 ASSY,HEATED,MANO
LAM 853-011053-103 MANOMETER
LAM 853-011076-001 ASSY, GROUND, STRAP
LAM 853-011094-101 ASSY. MONOCHROMATOR,MODEL,EP200,MMD
LAM 853-011117-001 ASSY, GAP HEATING
LAM 853-011141-003 BRAKE,GAP,ASSY.
LAM 853-011168-500 ASSY GAP DRIVE PROTECTOR
LAM 853-011594-206 ASSY UPR ELECT 6"(46)
LAM 853-011632-001 4400, LOWER, ELC, ASSY
LAM 853-011833-001 BOX, RF, SWITCH, ASSY,HARNO/TEMP
LAM 853-012095-005 5"ASSY 5" EXIT ARM
LAM 853-012095-006 ASM EXIT ARM 6" WT
LAM 853-012095-006 ASM EXIT ARM 6" WT
LAM 853-012095-008 ARM, EXIT
LAM 853-012118-006 LOAD LOCK ARM
LAM 853-0121