国际电工委员会(IEC)在其标准中将PLC定义为:
「可程式逻辑控制器是一种数位运算操作的电子系统,专为在工业环境应用而设计的。
它采用一类可编程的存储器,用于其内部存储程序,执行逻辑运算、顺序控制、定时、计数与算术操作等
面向用户的指令,并通过数字或模拟式输入/输出控制各种类型的机械或生产过程。可程式逻辑控制器及
其有关外部设备,都按易于与工业控制系统联成一个整体,易于扩充其功能的原则设计。」
PLC的特点
2.1可靠性高,抗干扰能力强
高可靠性是电气控制设备的关键性能。PLC由于采用现代大规模集成电路技术,采用严格的生产工艺制造,内部电路采取了先进的抗干扰技术
,具有很高的可靠性。例如三菱公司生产的F系列PLC平均无故障时间高达30万小时。一些使用冗余CPU的PLC的平均无故障工作时间则更长。从
PLC的机外电路来说,使用PLC构成控制系统,和同等规模的继电接触器系统相比,电气接线及开关接点已减少到数百甚至数千分之一,故障也
就大大降低。此外,PLC带有硬件故障自我检测功能,出现故障时可及时发出警报信息。在应用软件中,应用者还可以编入外围器件的故障自诊
断程序,使系统中除PLC以外的电路及设备也获得故障自诊断保护。这样,整个系统具有极高的可靠性也就不奇怪了。
2.2配套齐全,功能完善,适用性强
PLC是一种专门为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
设备都应该按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。
PLC发展到今天,已经形成了大、中、小各种规模的系列化产品。可以用于各种规模的工业控制场合。除了逻辑处理功能以外,现代PLC大多
具有完善的数据运算能力,可用于各种数字控制领域。近年来PLC的功能单元大量涌现,使PLC渗透到了位置控制、温度控制、CNC等各种工业控
制中。加上PLC通信能力的增强及人机界面技术的发展,使用PLC组成各种控制系统变得非常容易。
Keyence Amplifier AG-80 New (B8)
Keyence LV-21A w/ LV-H62 (31M)
Keyence LV-21A w/ LV-H52 (31M)
Keyence CZ-V1 w/ FU-35FA (A1)
Keyence PS-T1 w/ PS-52T & PS-52R New (A1)
Keyence Amplifier FS-V21R & FU-35FA ...
KEYENCE Colour Differentiating Sensor CZ-V1 (A1)
Keyence LV-12SBP New (A1)
AB Allen-Bradley 42FT-F6LPA-A2 w/ 43PT-CBS56FS new ...
Omron PLC CPM2C-20CDT1C-D w/ 24EDT1C , PA201 (9)
Keyence PLC KL-N20Z , KZ-350 , L2 , MT-T2 , KZ-U5 (9)
Matsushita NAIS PLC FP2-C1SL , SL2 , X64D2 , Y64T (3)
WAGO 750-842 , -402 ,-403, -600 , -516 , -504 ...
Pro-Face GP430-EG11 / GP430-XY31
PRO-FACE GPH70 - LG11-24V Panel (15)
MITSUBISHI Melsec PLC - AOJ2HCPU , AOJ2-E56DT (30-A)
MITSUBISHI FX2NC-16MR-T , 16EX-T , 16EYR-T (9)
Matsushita NAIS 1780P,1781P,FP-?C I/O ,CT-2,SL-FPC (V5)
Schneider Modicon TSX Quantum 140 CPS 214 00 (H1)
Toshiba PLC Provisor - CPU Module B200CU
Toshiba PLC Provisor -Optical 1ink Master B2000LM
MITSUBISHI MELSEC PLC FX2-48MR-D (J)
Omron PLC CQM1H-CPU21 w/ ID212, ID213, OD213 (J-UP)
Omron PLC CQM1H-CPU51 w/ ID212, ID213, OD213 (S1)
Matsushita NAIS PLC FP2-C1,SL2,X64D?2,XY64D2T,Y64T (3)
MITSUBISHI MELSEC PLC AD71 & A68B
Keyence Touch Panel VT-7SW (15)
Keyence Touch Panel VT-7SB (15)
Omron PLC TPM1A-40CDR-A , 20EDR - 3 pcs ...
MAKINO FPB2-EC-1 Panel (11A)
Samsung PLC N-70a ,DC IN 32P ,RY OUT 16P (16A)
Mitsubishi Melsec PLC AJ71T32-S3 (26)
Samsung PLC FARA N-70a DC IN 16P RY OUT 16P (S1)
SIEMENS Simatic S5 ET200U,6ES5 482,Bus module 6ES5 700
RKC FAREX SRM HG PCP , T10 , CT , SR mini (11)
MITSUBISHI MELSEC PLC SET A1SHcpu with Modules,complet?e
Mitsubishi PLC A2USHcpu-S1 A1SY42 A1SX42-S2
AB Allen-Bradley 1756-OV32E A cat. - B01 New ...
MITSUBISHI PLC FX1-48MT MELSEC (A1)
Mitsubishi Melsec PLC AJ71UC24 (26A)
MITSUBISHI Melsec PLC - AOJ2HCPU21 AOJ2H (2)
Koyo Direct 205 Logic PLC H2-EBC ,IN ,OUT/H2-WPLC2 (A1)
MITSUBISHI A1SD778M / A1SD774 Motion controller(10)
MITSUBISHI Melsec PLC AOJ2-E24T / AOJ2-PW NEW (A1)
MITSUBISHI Melsec PLC = A1SJ71QC24 RS-232-C (10)
MITSUBISHI Melsec PLC = A1SJ71QC24-R2 RS-232-C (10)
BECKHOFF BK5150 , KL2408 , KL1408 , KL9010 (J)
Samsung PLC - FARA N-700 CPU, w/ IN 32 & out 32 (V5)
MITSUBISHI A2UScpu,A1SY42,?A1SX42,A1S38B,A?1S61P (E/K)
Mitsubishi Melsec AJ71C24 S8 Computer 1ink (25E)
Mitsubishi Melsec A1SJ71AT21B / A1SJ71UC24-R4 NIB(A1)
Schneider Modicon TSX Quantum 140 CRA 931 00 (H1)
Schneider Modicon TSX Quantum 140 CRP 931 00 (H1)
OMRON SYSMAC C200H NC211 & CT021 (31E)
Seek Interactive Display SPD-813L-S DC24V (31M)
Mitsubishi Melsec AJ71C24 Computer 1ink Module (26)
Quartech Corp Operator Interface Panel 2900 (V)
Keyence RD-50R (B8)
K & C Technologies DS-300PLUS (16A)
AB ALLEN BRADLEY DeviceNet 1756-DNB B (16A)
Yamatake-Honeyw?ell Smart terminal TYP.ST221CF05W (15)
BECKHOFF BK5220 , KL1408 , KL2408 , KL3064 , KL9110 , ...
BECKHOFF BK5220 , KL1408 , KL1184 , KL2612 , KL4022 , ...
Matsushita 1780P,1781P-2 , SunX SL-FPC (V5)
Keyence RD-50E
MITSUBISHI Melsec PLC - A68AD card (26)
MITSUBISHI Melsec PLC - AOJ2 - D71 (2)
MITSUBISHI Melsec PLC - AOJ2HCPU AOJ2H (2)
MITSUBISHI MELSEC FXo-20MR-ES NEW (A1)
MITSUBISHI MELSEC A1SJ CPU-S3 w/ module cards-A1SJ71AT
MITSUBISHI MELSEC PLC FX 2NC - 64 MT 16EX-T,16EYR-T(?9)
MITSUBISHI Melsec PLC - AY81 card . (D1)
MITSUBISHI Melsec PLC = A1SCPU A1S cpu (10)
MITSUBISHI Melsec PLC = A1SD75P3-S3 Positioning (10)
MITSUBISHI Melsec PLC = A1SJ71AT21B Data 1ink (10)
Omron PLC CPM1A-40CDR-A , 20EDR (J-...
Keyence PLC KZ-300 , C32X , C32T (9)
Mitsubishi Melsec PLC AY81 (26A)
Fuji Flex-PC NB Base Unit NB2U90R-11 (J)
Mitsubishi Melsec A1SI61 / A1SD61 NIB (A1)
Keyence PLC KV700 w/ L20 , B16XA , B16RA (9)
MITSUBISHI MELSEC PLC F1-20MR (M)
MITSUBISHI MELSEC PLC FX 3UC-32MT-LT (9)
MITSUBISHI MELSEC PLC SET A1S cpu with Modules
Omron PLC CJ1W-SCU41-V1 (9)
Mitsubishi Melsec PLC AD71 (26)
MITSUBISHI Melsec PLC - AOJ2 -E56DR (2)
MITSUBISHI Graphic Teriminal A8510GOT - LWD (15)
MITSUBISHI Melsec-Q QJ71C24N-R2 (J)
Omron PLC CS1G cpu42H / cpu42-V1 (A1)
MITSUBISHI Melsec PLC = A1S64TCTTBW-S1 Temperature (10)
Toshiba PLC Provisor -Analog Input Module B200ADC
Toshiba PLC Provisor -Counter Module B200CTR 50K PPS
Toshiba PLC Provisor -Analog Output Module B2000DAC
MITSUBISHI PLC FX-32ER MELSEC (A1)
MITSUBISHI PLC FXon-60MT MELSEC (16A)
Mitsubishi Melsec A68B , A61P w/ cable (25E)
MITSUBISHI PLC FX2-48MR MELSEC (16A)
MITSUBISHI MELSEC AJ65SBTB2N-16R Output Unit (1)
MITSUBISHI MELSEC A1SJ CPU-S3 w/ module cards (D1)
MITSUBISHI Melsec PLC A1SD61 High Speed Counting (10)
MITSUBISHI MELSEC PLC FX2N-4AD , 1PG , CNV-IF (9)
MITSUBISHI MELSEC PLC A68B Base & A61P (D1)
SIEMENS SITOP power 10 6EP1 334-1SL11 (F1)
Matsushita NAIS I.P.O DO1TL AID1052 (15)
MITSUBISHI Melsec FX1N-60MR (J-dwn)
Schneider Modicon TSX Quantum 140 ACI 030 00 Analog In ...
MITSUBISHI Graphic Teriminal A851GOT / A8510GOT-S8D / A...
Mitsubishi Melsec PLC AJ71UC24 (26)
Mitsubishi Melsec PLC AX71 (26A)
Mitsubishi Melsec PLC AY23 (26A)
Yokogawa PLC F3BP20 BP20-ON , F3SP35 SP35-5N CPU(11)
Yokogawa PLC F3SP35 SP35-5N cpu w/ power & base (11)
Yokogawa PLC F3SP35 SP35-5N cpu w/ power & base (11)
MITSUBISHI Melsec PLC = A1SJ71UC24-R2 RS-232-C (10)
OMRON PLC CPM1A-20CDR-A-V?1 NEW (11A)
Schneider Modicon TSX Quantum 140 DDI 353 00
Schneider Modicon TSX Quantum 140 ACO 020 00
MITSUBISHI PLC FXon-40ET / FXon-40MT-DSS (16A)
Mitsubishi Melsec PLC AY13 (26A)
Keyence PLC KV-24DR w/ E4XR & E8R (9)
Mitsubishi A1SJ71UC24-R4 / A1SJ71LP21 / A1SJ61BT11
Mitsubishi A1SJ71UC24-R2 / A1SJ71PT32-S3 /A1S65B/A1S55B
Omron PLC CPM1A-40CDR-A-V?1 (J-up)
Yokogawa PLC F3RS22 RS22-ON ,RS232 interface (11A)
Siemens SIMATIC S7-200, CPU 212 6ES7 212-1BA01 (V2)
MITSUBISHI MELSEC PLC FX 2NC - 64 MT (9)
SMC ECC-PNAL2-14MR-?D PneuAlpha (up)
HAKKO V4SB110E-G / V4SC010E-G Touch Screen (1)
Schneider Modicon TSX Quantum 140 DRA 840 00 (H1)
SIEMENS 6ES7 322-1BH01-0AA0 , 6ES7 322-8BF00-0AB0 ...
BOC Edwards pump display terminal p.no. D37280700 / D3...
Mitsubishi Melsec PLC A65B (26D)
GE Fanuc Series 90 Micro PLC IC693UDR010BP1 new (V2)
Yokogawa PLC F3AD04 AD04-ON A/D converter (11)
Yokogawa PLC F3RS22 RS22-ON ,RS232 interface (11)
Yokogawa PLC F3XD08 - 6N DC Input (11A)
Yokogawa PLC F3XD32 XD32-3N DC input (11)
MITSUBISHI Melsec-Q QJ61BT11N (J)
Matsushita Mark III APL2004 PL24M-III National PC (G1)
Mitsubishi PLC A1SX81 , S1 / A1SX41 / A1SX40-S1 (A1)
Mitsubishi Melsec PLC A62DA (25E)
MITSUBISHI Melsec PLC - AOJ2 -E28DR (2)
OMRON PLC CPM1A-30CDR-A (Z1)
OMRON SYSMAC C200HW-DRM21-V1 Compobus/D unit (11A)
MITSUBISHI PLC FXo-30MT-D (16A)
Schneider Modicon TSX Quantum 140 ACO 020 00 ...
MITSUBISHI PLC FXon-24MT MELSEC (16A)
Matsushita Nais PLC FPO-SL1 & E32T
Yokogawa PLC F3LC11 LC11-1N Computer 1ink (11)
MITSUBISHI MELSEC FX0-20MT-D FXo-20MT-D (3)
MITSUBISHI MELSEC FX1S-30MT-D (3)
MITSUBISHI Melsec PLC A1S58B Base unit (10)
MITSUBISHI Melsec PLC A1SY10 NEW (10)
SMC ECC-PNAL-10MR-D PneuAlpha (up)
MITSUBISHI PLC FXos-30MT-D (16A)
LTX QTERM-IV Model F088 Panel (A16)
Matsushita NAIS GT01 AIGT0030H1 (15)
Schneider Modicon TSX Quantum 140 DDI 353 00 (H...
BOC Edwards THERMAL PROCESSOR UNIT DV-1000 (J-top)
Matsushita NAIS PLC AFPO02353 FPO-C16P FPO-C16
Mitsubishi Melsec PLC AY41 (26A)
MITSUBISHI memory A2NMCA-30KE / A2MCA-14KE (no.E)
MITSUBISHI Melsec PLC - AOJ2 -E56DT (2)
MITSUBISHI FX 0N - 16EX-ES/UL FXoN-16EX-ES/UL (B8)
Seek Interactive Display SPD- 803 (31M)
Yokogawa PLC F3YD32 YD32-1A TR output (11)
Yokogawa PLC F3YD64 YD64-1F TR output (11)
Yokogawa PLC LE01-5T Ethernet F3LE01-5T (A2)
MITSUBISHI AY51C MELSEC PLC Output Unit - Used
MITSUBISHI Melsec AX41C / AX40Y50C
MITSUBISHI MELSEC PLC A1SH42 / A1SY42
Matsushita Nais S 1ink Control Unit FPO-SL1 w/2 E32T
KEYENCE PLC KZ-16T , 8ET ,8ER ,U2 (Z1)
MITSUBISHI MELSEC FX1S-20MR-D (3)
MITSUBISHI MELSEC FXos-20MT-D (16A)
GE Fanuc 90-30 IC693MDL740E , C , D Output NEW (Z1)
OMRON SYSMAC C200HW-SLK24 1ink Unit (Z1)
KEYENCE PLC KV-300 CPU , U4 (Z1)
Schneider TWIDO TWDAM12HT expansion (D1)
Schneider Modicon TSX Quantum 140 XBP 016 00 (H1)
Yokogawa PLC F3XD16 - 3N DC input (11A)
Yokogawa PLC F3XD16 - ON DC input (11A)
Mitsubishi Melsec PLC A38B (26C)
Mitsubishi Melsec PLC A68B (26C)
Yokogawa PLC LC11-1N Computer 1ink F3LC11-1N (A2)
GE Fanuc 90-30 PLC IC693PWR321P (31B)
KEYENCE HC-50 (Z1)
Matsushita Nais S 1ink PLC FPO-C16T & E8RS
Matsushita Nais PLC FPO-C16T & E16T
Matsushita NAIS PLC FP2- SL2 , AFP2780 Ver.1.0 (3)
Yokogawa PLC F3XD64 XD64-3F DC input (11)
MITSUBISHI MELSEC PLC F1-10ER / F-EEprom-1 (M)
MITSUBISHI Melsec PLC A1SY50 Output unit (10)
GE Fanuc 90-30 IC693MDL741E Output NEW (Z1)
GE Fanuc 90-30 IC693MDL741D Output NEW (Z1)
GE Fanuc 90-30 IC693MDL645D Input NEW (Z1)
OMRON SYSMAC C200HW-CLK21 1ink Unit (11A)
IDEC Micro3 FC2A-C16B1 (16A)
Schneider Modicon TSX Quantum 140 XBP 010 00 (H1)
SIEMENS SM322 6ES7 322 /SM321 6ES7 321 / 6ES7 195 (E)
Yokogawa PLC F3PU20-ON Power Supply (11A)
Mitsubishi Melsec PLC A35B (26D)
Mitsubishi Melsec PLC A55B (26D)
Termiflew Trillium Handheld Terminal (A15)
MITSUBISHI MELSEC FX0-14MT-D FXo-14MT-D *** (3)
MITSUBISHI MELSEC PLC FX os - 14MT -D (16A)
Matsushita Nais S 1ink PLC FPO- SL1
KEITHLEY M1141 (B8)
Omron PLC CPM1A-10CDT-D (31J)
Mitsubishi Melsec PLC A61P (26D)
Mitsubishi Melsec PLC A62P (26D)
Mitsubishi Melsec PLC AX42 (26D)
Mitsubishi Melsec PLC AY42 (26D)
Omron 3G8B2-AP000 Card (V)
Omron PLC CPM2C-24EDT1C (9)
MITSUBISHI MELSEC CL2Y16-TP1M1V / CL2X16-D1M1V (11)
MITSUBISHI MELSEC AJ65BTC1-16D-AP Input unit (11)
MITSUBISHI MELSEC AJ65BTC1-16T-AP Output unit (11)
MITSUBISHI MELSEC PLC FX2N-16EYR -ES/UL (9)
KEYENCE KV-R16T (Z1)
MITSUBISHI MELSEC PLC FX 0N - 16 EYT (16A)
MITSUBISHI MELSEC PLC A1SY41 output unit
KEYENCE PLC KV-16EYR (Z1)
KEYENCE HC-55 (Z1)
Yokogawa PLC F3PU10-ON Power Supply (11A)
MITSUBISHI Power unit A1S63P , 62P , 61PN (10)
Yokogawa PLC RS22-ON RS232 Interface F3RS22 (A2)
MITSUBISHI Melsec PLC A1SX40 Input unit (10)
KEYENCE PLC KV-300 CPU (Z1)
AB ALLEN BRADLEY 2090-U3CBB-DM12 ser. A NEW (16A)
KEYENCE PLC KV-C16X (Z1)
Yokogawa PLC F3BU04 - ON BASE (11A)
Matsushita Nais S 1ink PLC FPO-E16X
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