IPM2-P0904HA

可编程控制器由于抗干扰能力强，可靠性高，编程简单，性能价格比高，在工业控制领域得到越来越广泛应用。工业控制机作为中央控制单元，配有组态软件，选用大屏幕实时监视界面，实现各控制点的动态显示、数据修改、故障诊断、自动报警，还可显示查询历史事件记录，系统各主要部件累计运行时间，各装置工艺流程图，各装置结构图等。中央控制单元和下位机PLC之间采用串行通讯方式进行数据交换，通常距离在1000m以内选用485双绞线通讯方式，较常距离可选用光纤通讯，更长距离也可选用无线通讯方式。下位机选用PLC控制，根据控制对象的多少，控制对象的范围，可选用一台或多台PLC进行控制，PLC之间数据交换是利用内部链接寄存器，实现数据交换和共享。

2  控制系统可靠性降低的主要原因

   虽然工业控制机和可编程控制器本身都具有很高的可靠性，但如果输入给PLC的开关量信号出现错误，模拟量信号出现较大偏差，PLC输出口控制的执行机构没有按要求动作，这些都可能使控制过程出错，造成无法挽回的经济损失。

2．1 影响现场输入给PLC信号出错的主要原因有：

2．1．1  造成传输信号线短路或断路（由于机械拉扯，线路自身老化，特别是鼠害），当传输信号线出故障时，现场信号无法传送给PLC，造成控制出错。

2．1．2  机械触点  抖动，现场触点虽然只闭合一次，PLC却认为闭合了多次，虽然硬件加了滤波电路，软件增加微分指令，但由于PLC扫描周期太短，仍可能在计数、累加、移位等指令中出错，出现错误控制结果。

2．1．3  现场变送器，机械开关自身出故障，如触点接触不良，变送器反映现场非电量偏差较大或不能正常工作等，这些故障同样会使控制系统不能正常工作。

BBC Brown Boveri Solid State Trip Type SS

Siemens Simatic 6ES7 153 DP Slave Interface Module 

Rank Precision Industries/ Taylor-HobsonSurtronic 2 Meter Unit

Baldor Industrial Motor JM311 3PH 3/4?HP 

Acromag Model 4531-FQZ-V0 w/Series Cage?1800 

Cutler-Hammer/Eaton?E51CLF3 Photoelectric Sensor 

Solitech K3-480-30-1752 3PH Power Controller 

Electro Sensors TR400 Reverse Rotation Detect Ratemeter 

Mannesmann Rexroth Hydraulic Valve 5-4WE10EB32 / CG24N9K4 /?C 

K-Tek TX/A1/S6/1011?Level Switch 

Square D MCC Bucket?Size 2 Starter

BS&B JRS 10" Rupture?Disk 

Watlow Firebar 2-36-28-1 Heater Element?

Cannon 125 Vibrator?

GE Fanuc IC600BF904K?Output Module 

Jordan Model 50 Stainless Steel 3/4" Pressure Regulator UNUSED

EL-O-MATIC Type: ESA25-4/A Actuator 

Dayton 3N042M 3PH 3/4HP Industrial Motor

Parker 02.50CH2AU13AC3.125 Air Cylinder?

Cutler Hammer Clipper VL CVL 50 Surge Protective Device 

MTE RL-02512 3 Phase?Reactor 

Allen Bradley 1321-3R35-B Line Reactor 

Cutler Hammer HMCP015E0C 15amp Circuit Breaker 

Cutler Hammer BA13A?Size 1 Overload Relay 

Victor SR250D Compressed Gas Regulator 

Allen Bradley 140-MN-0400 Motor Starter?/ Circuit Breaker -LOT OF 4

Allen Bradley Guard?Master 440P-MSLB22E?Limit Switch 

Hubbell HBL430C5W Watertight Connector 

ABZ 4" CF8M Stainless Butterfly Valve

Samson 1.5" CF8M Stainless 3277 Control?Valve w/ Actuator

ABZ 3" CF8M Stainless Butterfly Valve

Stockham 3" Brass Swing Check Valve 

Honeywell C7035A 1023 Mini Peeper UV Flame Detector 

Crouse Hinds N2S Control Station for Hazardous Locations UNUSED

Rees 04945-000 Rope?Operated Sequence Switch 

Phoenix DL-INC-DWT-60 120 Volt Dock Light

Thermo Scientific Sapphire TM Loop Test?UNUSED

Numatics 340SA4410 Pneumatic Valve 

Cooper AH460M17W Series 309 Interlocked?Receptacle

Red Lion Controls IMI04163 Digital Rate?Meter 

ARO PD05P .5" Diaphragm Pump

Emerson 616024 Control

Varian 03-919185-00?Powered Event Module

Wika Pressure Gauge?and Diaphragm Seal Assembly 300psi 

Mercer Rubber (3" /?1 1/2" x 8") Expansion Joint 

AO Smith Quad Plus H1009 3/4 HP Motor 

Fanuc AIF01A I/O Interface Module 

Red Lion PRA11011 Pulse Rate to Analog Converter Controls LOT OF 2-

Telmar 515000 Transmitter

Cleveland - Kidder Tensi-Master SC-1T

Chromalox Temperature Control AR-219?

Foxboro P91V-3PDN Vernier Valvactor Type?C 

Square D 9036GG2R Open Tank Float Switch

Dodge 4545 X 3-5/8 KW Tape-Lock Bush 

Bailey Fischer Porter Model 10 2" Flow Tube

Numatics DVS280PNQ8?Pressure Sensor w/ Digital Display LOT OF 2-

Drexelbrook Universial True Level Series?7000

Telesis Marketing Systems 19819 DC Input/Output Interface 

Whitey SS-45XVC08 Stainless 3-Way Valve?

Reliance Electric AutoMate 45C40 Dual Input LOT OF 4- SEALED!

Turck Bi15-CP40-AP6X2/S10 Proximity Switch 

Parker Skinner 71215SN2QN00 Stainless Solenoid Valve -LOT?OF 2

Azbil 1LX5001-R Explosion Proof Raintight Switch UNUSED

Allen Bradley 440T-MRK Box Mounted Single Key Rotary Switch?

Drexelbrook Level Control Transmitter 406-6400-1 3/4" 

Dresser / Roots 16M?CTR Gas Meter -NO BOX

Allen Bradley 1606-XLP Power Supply -NO BOX

ATC 306E 0-30/30-0 Minute Timer 

Square D 9998CA-82 4?Pole Contact Kit For Size 1 

Milwaukee 1151M 3/8"?Gate Valves LOT OF?19-

VWR Dylastir 58935-250 50Watt Magnetic Stirrer

Siemens 3RB2036-1UB0?Overload Relay 

Cutler-Hammer Powereed D40RBA Type R Reed Relay -LOT OF 2

Sola SDN 2.5-24-100P?Power Supply

Dayton 2M184B 1/15 HP AC/DC Motor 

Endress Hauser PMC731 CERABAR Pressure Transmitter

Mannesmann Rexroth Directional Valve 4WE6H60 / EW110N 

Rosemount 8701 TSA010C1 1" Magnetic FlowTube

Honeywell UDC3000 Temperature Controller

Honeywell C437 1/2"-5.5" water Gas/Air Pressure Switch 

Armsrtong 1810 1/2"?Stainless Steam Trap?

Johnson Controls P72CA-2C Open High Pressure Control 

Jayco 1-1/4" TF Pressure Relief Valve UNUSED

Asco 8344G370 1/4" 4-Way Solenoid Valve?

Banner SC22-3 24V-DC?Safety Controller

Corning PC-310 Laboratory Stirrer

Belimo AF24 Spring Return Damper Actuator

Square D 8501XTD1 Timing Relay 

Square D 9012ACW2 Pressure Switch UNUSED

True Blue EASMT5 3/4" Direct Acting Normally Closed Solenoid?Valve 

Allen Bradley 836T-T260J Pressure Control 

PepperL + Fuchs NBN15 Proximity Sensors?-LOT OF 6

Armstrong B394B 1" Bucket Steam Trap UNUSED

Symbol N410 Hand Held Laser Barcode Scanner w/ Charging Base

Turck UProx Bi10U-G30-ADZ30X2 Proximity?Sensor 

Tsubaki RS40 RIV Roller Chain 10' LOT OF?3 

Endress Hauser FTL51-Qyy9 Liquiphant M 5.50" Switch Point

Allen Bradley 800H Switch Box Series

Flowserve A2R10786-31 Dual Pressurized Seal 

Moore 502W Nullmatic?Controller 

Omron E3X-DAG11-S Photoelectric Switch Amplifier 

Reliance GP-2000 1HP?VFD Drive

Allen Bradley 592-EC1CC Series A Overload Relays LOT OF 2

Hayward TB1250SE 2.5" PVC True union Ball Valve 

Clark 934028 12V Alternator RCP48995?

Brooks Instrument Flowmeter 3602-08B2H1A 

Mettler-Toledo 12812600A Keyboard -SEALED!

VICOR 150 Watt Power?Supply VI-LU4-EV?

U.S. Electric Motor?1/2 HP 3PH 62.12505.881

Johnson Controls Series A36 4-Stage Temperature Control 

Cutler Hammer E51KT726 Fiber Optic Cable

YSI Conductance - Resistance Meter Model?34

Ametek Drexelbrook Explosion Proof Continuous Level Control?Model 405-2400 

Albion 4" Swivel Industrial Castors / Dolly / Kart Wheels -LOT OF 4

Acrison 121-0434 Screw Feeder Part

Swan 304 Stainless Steel 7/8" Annular Thd. Nails 25lb Box 

Honeywell DC30E- KE-200-20-000000-00-0 Temperature Controller

PSI 6" PPL Lined Fitting 45 

Moore ECT Signal Isolator Converter -LOT OF 2

Cutler-Hammer Directrol Receiver ControlCircuit Board D520BC1 

Yuken BT10-3290 Relief Valve 

Dayton 5K598B 1/4HP?Capacitor Start Motor UNUSED

Allen Bradley 1746-OW16 SLC500 Output Module

Honeywell S427D 1007?Plug-In Purge Timer?

Allen Bradley 1746-IB16 SLC500 Input Module

Square D 2510KR-1 Motor Starter Switch 

Honeywell UDC3000 Versa-Pro Temperature?Controller

Telemecanique / R.B.?Denison L100WTL Type L Limit Switch 

Spirax Sarco B-1H 3/4" Steam Trap -NO BOX

Flowline LR79326 Relay Level Controller

Square D 9070EO3D1 Industrial Control Transformer 

Parker Skinner A3LB2127 Valve 

Rexnord Falk 1025G Gear Coupling 

Spirax Sarco B1HS 1/2" Bucket Steam Trap

Square D 9998CA-81 3?Pole Contact Kit For Size 1 

Square D HU362 60amp?Heavy Duty Safety Switch / Interruptor?

McDonnell & Miller 1" FS4-3 Flow Switch?

Milwaukee ML224T 3"?Iron Butterfly Valve?w/ Lever Handle Kit?

Square D 9012 GNG-6?Pressure Switch

Potter VSR-8 Vane Type Waterflow Alarm Switch w/ Retard 

Hach 44000-10 1720C?Turbidimeter

Telemecanique ZCK M1?Limit Switches LOT?OF 3-

Lufkin E7079404 Filter Assembly 

Numatics 237-415B Air Valves LOT OF 2-

Mueller Streamline 429-040 PVC 4" Couplings -Quantity 5

Siemens 42AF35AF Definite Purpose Controller 

Square D 8501XO40V02?AC Control Relay 

Mac 181B-594CABA Solenoid Valves -LOTOF 2

Telemecanique ZCKD17?Limit Switch LOT OF?3- 

Cooper Crouse Hinds?EDS2130 Explosion Proof Snap Switch

Honeywell ST3000 STG94L Digital PressureTransmitter

Shockwatch Impact Safety Monitor / Recorder Sensor M 

Jamesbury Neles 1" Stainless Ball Valve

Baldor 50 X 1-3/8" KS 096020 Torque Tamer 

Numatics A23BA400LT47E30 120 Volt Directional Control Valve?

Allen Bradley 1771-ASB Chassis w/ 9 Cards

Allen Bradley 1772-LN3 PLC-2 Mini Processor 

Speedaire 5HP thru 10HP 52714 Overhaul Kit 

Allen Bradley 1791-32AO Block I/O Module

Acromag Rate Limiter?1765-G-TV-1-C 

Eurotherm 7100L Input Logic DC

Dwyer 1950 Integral?Explosion-Proof Pressure Switch 

Mettler Toledo PCB Power Supply B12526800A 

Mettler-Toledo A125270 PCB, DOT Matrix Display -SEALED!

Allen Bradley 1772-LN3 PLC-2 Mini Processor

Red Lion Model IMI 

Fisher Type MC756 Power Supply

Sid Harveys B&G Dual?Valve Assembly #8?

Cutler-Hammer 25RBA2-125E Fuse Refill?-Sealed

Quadram Data Buffer?Microfazer II

Allen Bradley 813S-VOB Line Voltage Monitor Relay

Namco EP120-12701 Photoelectric Sensor

Cutler Hammer D520BC2 Directrol Link Control Circuit Board

PSI 6" PPL Lined Fitting 90 

SOR Static"O"Ring Pressure Switch 

GE Motor 5KCP39MG 5313ET Single Phase1/2HP 

Allen Bradley 100-DTB420 Set of Frame Terminal Block -LOT?OF 2

Fischer & Porter Model 2345 100mm Microprocessor Recorder 

Micro Switch LSXC4L?Precision Limit Switch 

SJE-Rhombus 1009773?Sensor Float ControlSwitch 

Magnetek 638-0181-000-0 Ignition Transformer 

Chromalox 2001-40211?Temperature Controller UNUSED

Manifold MSA PremAire Airline Respirator?

Allen Bradley 1492 40 Point Isolated Fusible Interface Module 

Red Lion IMR00100 Control -SEALED

Allen Bradley 1747-SN SLC500 Remote I/O?Scanner

Allen Bradley 1746-IA16 SLC500 Input Module

GE 121AC51 Time Overcurrent Relay 

Square D 9065C01 Thermal Overload Relay?LOT OF 4 - 

Acme Electric DR120245 Power Supply NICE SHAPE

Allen Bradley 1492-IFM40F 40point Fusible Interface Module?

Signet P58440 Flowmeter NICE SHAPE