P0903CW

2．2  影响执行机构出错的主要原因有：

2．2．1  控制负载的接触不能可靠动作，虽然PLC发出了动作指令，但执行机构并没按要求动作。

2．2．2控制变频器起动，由于变频器自身故障，变频器所带电机并没按要求工作。

2．2．3各种电动阀、电磁阀该开的没能打开，该关的没能关到位，由于执行机构没能按PLC的控制要求动作，使系统无法正常工作，降低了系统可靠性。

3．解决方案的实施：要提高整个控制系统的可靠性，必须提高输入信号的可靠性和执行机构动作的准确性，PLC才能及时发现问题，用声光等报警办法提示给操作人员，尽快排除故障，让系统安全、可靠、正确地工作。

3．1 设计完善的故障报警系统

   在自动控制系统的设计中我们设计了3级故障显示报警系统，第1级设置在控制现场各控制柜面板，用指示灯指示设备正常运行和故障情况，当设备正常运行时对应指示灯亮，当该设备运行有故障时指示灯以1Hz的频率闪烁。专门设置故障复位灯按钮，显示设备工作状态。第2级故障显示设置在中心控制室大屏幕监视器上，当设备出现故障时，有文字显示故障类型，工艺流程图上对应的设备闪烁，历史事件表中将记录该故障。3级故障显示设置在中心控制室信号箱内，当设备出现故障时，信号箱将用声、光报警方式提示工作人员，及时处理故障。在处理故障时，又将故障进行分类，有些故障是要求系统停止运行的，但有些故障对系统工作影响不大，系统可带故障运行，故障可在运行中排除，这样就大大减少整个系统停止运行时间，提高系统可靠性运行水平。

Allen Bradley 1746-OA16 Output Module 

Gore One-Up Pump Diaphragms  - LOT OF?21

Winsmith D-90 Type SE Speed Reducer 917

Grove Gear SP BMQ226?Flexaline Worm Speed Reducer -SEALED

Cannon 222 Vibrator?

Buss JCK-4R 130amp Fuses -LOT OF 3

Tyco Mcal F79U Pneumatic Actuator 

Prab Conveyors GOLD?FHM0224 Gear Box 

Square D FAL36070 70amp Circuit Breaker-SEALED!

Acrison MDII Series?Weigh Feeder Controller Board

Square D 8536SD01 Size 2 Starter

Guardian G1814P Wall-Mounted Eye Wash w/Two Spray Heads 

Crouse Hinds EDSC2129 Snap Switch & ENRC21201 Receptacle for?Hazardous Locations

Tufline GS 1.5" DI Plug Valve 

Square D FHL36100 100 Amp Circuit Breaker

Research Control Valve 1001GCN36SVCPGLS3T 1/4" NPT 

Reliance P56H1438G 2HP 3450 RPM 208-230/460 Volt Duty Master?A-C Motor 

Reliance P14X3241V 2HP 3450 RPM 230/460?Volts Duty Master A-C Motor 

MicroMotion 40S-HY-A150 1/2" Mass Flow Sensor

Allen Bradley 22D-B5P0N104 1HP PowerFlex40P AC Drive

Artech Scale 30310-2.5K Load Cell 

Crouse Hinds ENR21201 Receptacle Interlocked Switches LOT OF?2

Telemecanique XS618B4PBM12 Inductive Proximity Sensors LOT OF 8- 

Allen Bradley 100-B250N-3 Contactor

Square D 8536 SE01 Size 3 Motor Starter

Micromotion DS150S141 1.5" Mass Flow Sensor

Samson 2430 Thermostat for Temperature Regulator 

Toshiba VF-SXN 3PH Drive

Foxboro Output Meter?2B7801 

Mettler Toledo 0743?10000lb Load Cell 

Allen Bradley 2113B-CAB-6P-44CA Size 2?25HP MCC Bucket

GLI Model 692P Two-Wire pH Transmitter

Tri-Clover 2"X4" Stainless Steel Sanitary Pump Casing 

Honeywell ST3000 Pressure Transmitter 

Indu-Tech LT-3110 Stainless Steel Isolation Valve 

Labour Pump Alloy Wear Plate UNUSED

Red Lion IMP 2316 Digital Meter 

Marsh / Videojet 15429 Card ML4 Print 

Reliance Electric 45C2 I/O Rail Motherboard 

Allen Bradley 802PR-LAAH1 Proximity Limit Switch -LOT OF?2

Appleton EFDB175U1 3/4" EFD Control Station 

Allen Bradley SLC 500 1747-SDN DeviceNetScanner Module NICE SHAPE!

Rosemount 751AM7E5B?Field Signal Indicator

Reliance 61C22B AutoMate Local I/O Head

Reliance SP500 VS 1HP 3PH Drive

MicroMotion S025S113?1/4" Mass Flow Sensor

Allen Bradley 709-BJB1 Size 1 Type 12 ACAutomatic Starter UNUSED

Square D 9012AEW-1 Differential Switches?LOT OF 2

Armstrong 1.5" "Y" Strainer 

Marathon C220 1HP 1730 RPM 208-230/460 Volt Electric Motor 

Teel 1/3 HP 2P688/RIC 1.5" Centrifugal Pump

Baldor VM355T 2HP 3450 RPM 230/460 Volt?Motor 

Marathon E952 2HP 1740 RPM 208-230/460 Volt Series E Motor UNUSED

Allen Bradley 1747-L30B Processor Unit w/ 2-Slot Expansion Rack NICE SHAPE

Allen Bradley 845H-SJHZ24CRY2C Optical Incremental Encoder

Westinghouse HMCP100R3C 100amp Circuit Breaker

Cooper Bussmann Premium Branch Circuit Fuse Service Kit Low-Peak JSK-36 UNUSED

Cooper Bussmann System 300 Low-Peak Yellow Service Kit LPRK-28 UNUSED

Moeller DIL M(C)65 X?Start Contactor UNUSED

Sterlco 1" R-152-F Temperature Control?

Sew Eurodrive R27AM145 Gear Box Drive 

Staco Type 3PN2210 Variac Variable Transformer

Endress Hauser Liquiphant M FTL51 Level?Switch Point

CMC BLM4035 Brushless DC Servo Motor (Rebuilt)

ASCO TriPoint TB10A31 Pressure Temperature Switch 

Modicon B243-110 A/D?Converter 10VDC

Brooks 5522M11E1A0A?Flow Meter 

Endress & Hauser Liquiphant M FTL51 Level Switch 

Honeywell ST3000 S100e Pressure Transmitter YSTF12F 

Honeywell ST3000 Smart Transmitter w/ Flanges 

Hubbell 2220 Pilot Duty Speed Switch 

Goulds 3198 1.5"X3"X7" Backplate 

Honeywell ST 3000 Smart Transmitter 

Telemecanique D10S3?100amp Disconnect Switch 

Honeywell Microswitch PTW5213 Push Indicators -LOT OF 13

Fisher Dyna-Mix Model 143

Electra-Gear 21RLC540G/F Gear Box 

Baldor M3601 3/4 HP?3 Phase 1140 RPM Industrial Electric Motor 

Fisher Versa-Bath Model 131 Water Bath

Siemens 62VA Constant Differential Relay?

Parker 02.50CH2AUS13AC4.750 Air Cylinder

AMT 3201-96 1/4HP Straight Centrifugal Pump 

Cashco Model "D" 3/4" Stainless PressureReducing Regulator?

Allen Bradley 1762-OW16 16pt VAC/VDC Realy Output

North American F143T1M4A 1HP 1800 RPM 208-230/460 Volt Electric Motor 

Marathon E950 1HP 1745 RPM 208-230/460 Volt Electric Motor 

Reliance 61C22A AutoMate Local I/O Head

Schneider AirSystems?FZ 4-6 Spring Balancer 

Quantum Fireball 3.5?Series TM21S011 Hard Drive UNUSED

Rice Lake RL1040 Load Cell 

Honeywell L91B 1050?5-150 PSI Pressuretrol 

Vickers DG4V-3S-2N-M-U-B5-60 DirectionalSolenoid Valve UNUSED

Allen Bradley 802PR-LAAJ1 Proximity Limit Switches LOT OF 2-?

Honeywell 33254 Dynamic Self Check Rectification Amplifiers?LOT OF 3-REBUILT

Grundfos Alldos DMI?4,0-8 Dosing Pump 

Vishay KIS-2 20kN Load Beam/Weigh Module

Armstrong C5318-5 3/4" Steam Trap 

GE Motors 5K49ZG2291?3HP 3PH 

TB Wood's XFC4001-0A?1HP Micro-Inverter

Barco BC-54065-16-51?Rotary Joint 

Thomas 2107CA18-515?115 Volt Vacuum Compressor Pump 

Endress Hauser FTL3660 Liquiphant 2

Andritz Centri Cleaner Liquid Cyclone B140165M02 

Fisher 846 Current to Pressure Transducer

Allen Bradley 1746-P2 SLC500 Power Supply w/ 10-Slot Rack

Appleton EFSC175-2023 Receptacle Interlock w/ Switch

co S-211-Y 2" Bronze Soder Globe Teflon Disc Valve 

Xyplex MaxServer 1600 Terminal Server

Allen Bradley 700-HG42A1 30 Amp Control?Relay LOT OF 3- 

Wilkerson DM4380A DC?to DC Isolated Transmitter LOT OF 5

Parker Valve D1VW20BNJPF 75 

Ashcroft/Dresser T724T15030 Snap Action?Switch for Temperature Control 

Durco MG411 Stainless 1" 3-Way Plug Valve UNUSED

Stainless Products 2" Air Actuated Sanitary Tri Clamp Butterfly Valve

Marathon C220 1HP 1730 RPM 208-230/460 Volt General Purpose?Motor UNUSED

Marathon EVE143TTTN6526BAP 1HP 460 Volts1735 RPM Motor UNUSED

Extech HD700 Heavy Duty Differential Pressure Manometer

Honeywell ST3000 S900 R300 Smart Transmitter 

Goodyear Blue Wingfoot 300 1"X32' Flexible Chemical Hose 

American Industries?AA-408-.75-4-SP Shell & Tube Heat Exchanger UNUSED

Watlow Hazardous Location Immersion Heater 

Asco 8210B54 1" 120/60, 110/50 Solenoid?Valves  - LOT OF?2

Killark EBB32010A2 Hostile Emergency Light for Hazardous Locations

Wilkerson DM4380A DC?Input Field Rangeable Isolated Transmitter 

Siemens Simatic S5 Interface Submodule 6ES5752-0AA22 

FCI Fluid Components?29/30 

Rosemount Temperature Transmitter 3044C

Control Engineering?Guidepath Supply - Model 30775

Square D 9013 Explosion Proof Pressure Switch GSW-2 

Dodge Tigear 2.78:1?Gear Box 

Westinghouse Type D4B-2F Two-Stator Watthour Meter

Allen Bradley 1746-IA16 Input Module 

Rexnord / Stearns105672107PF Brake 

Graco Optimiser M-1265 HVLP Spray Gun

Honeywell MicroSwitch 6FS1 Proximity Switch Sensor -LOT OF 2

Thiele 157805 10:1 Ratio Gear Reducer 

SMC AMG350 Ambient Dryer -NO BOX

Jupiter Pneumatics Series 28100 3/8"X50'?Hose Reel 

Cutler Hammer DH361URK-CSA 30amp Heavy Duty Safety Switch UNUSED

Reliance GP-2000 A-C?V-S 1HP 3PH Drive

MicroMotion 1/4" Mass Flow Sensor

Honeywell S87C1030 Direct Spark IgnitionModule, 21 Sec. Delay 

Conbraco 2" Brass Ball Check Valve 

Rosemount 751AM7E513?Field Signal Indicator Transmitter

Allen Bradley 1747-L30A SLC 500 30 I/O Processor Unit

Asco 8210G4 1" Solenoid Valve UNUSED

IFM RV6025 Encoder

Cuno 40282-11 3/4" Filter 

Bimba TEV-043 Stainless Bores LOT OF 2-

Cutler Hammer AN16DN0 Size 1 Starter

Cougar ABF-35 Ball Vibrator UNUSED

Masterflow AH-752 750 Degree Heat Blower

Lab Companion HP-3000 Stir Heat Plate

Honeywell RM7838 A 1014 Burner Control

Killark EBB32010A2 Hostile Emergency Light for Hazardous Locations

Altivar 28 Schneider?ATV28 3 HP VFD Drive

Emerson Industrial Controls Focus II PN2450-8002

Siemens Powers Controls HU186 Room and?Duct Hygrostat 

Dynisco SCM600 Span/Zero Module REMANUFACTURED

Rosemount Analytical?619714 Universal Power Supply Kit 

Watts R119-10J M2 1-1/4" Pilot Regulator 

Post Glover DB75D0 Dynamic Breaking Resistor 

Cutler Hammer D520TC2 Relay Output Module 

Allen Bradley 2112B?Size 1 MCC Bucket

Barksdale MT1H-H154S-12 Temperature Switch 

Square D 9007MS10S0500 Compact Enclosed?Limit Switch 

Square D KAL36225 225amp Circuit Breaker

Rosemount 444RL2U1A2NA Temperature Transmitter 

Allen Bradley 1305-AA02A 1/2HP 3PH DriveNICE SHAPE

Rosemount 5081-C-HT?Two Wire Digital Readout

Allen Bradley SLC 500 1203-SM1 SCANport?Module- LOT OF 2

Milwaukee 1182 1" Brass Gate Valves -LOT OF 3

Allen Bradley SLC 150 Expansion Unit 1745-E151

Fisher Scientific /?Mettler P1000N Balance Lab 1000 gram Scale

MicroSwitch 151ML1 8728 Precision Limit?Switch UNUSED

Square D 100 Amp 240?AC Volt Circuit I-Line Breaker

Allen Bradley 100-B300N*3 Contact

Parker 15A1B00002 1/4" Filter Regulator?Lubricator 

Babbitt S7000/2 Dual?Point Level Switch?

Mac 6323D-611-PM-111DA Pneumatic Valve 

StoneL FieldLink 461078 Switched Protected Drop 

Westinghouse HMCP050K2C 50amp Circuit Breaker

Weg 00136ES3EB56 1HP 208-230/460 Volt 3470 RPM Motor 

Dwyer A-471 Capsuhelic Gauge Portable Kit

Nikkiso BK10C-N01D1?Non-Seal Pump Bearing Replacement Kit 

Allen Bradley 3KW 1394-AM04 Series Axis?Module

Endress Hauser FTL51?Liquiphant M

TB Woods XFC4005-OC?5 HP Micro Inverter

Special Metals Inco-Weld NC276-156-10TS?Welding Electrode 

Bailey Fischer Porter 1.5 401AC Flow Tube Meter 

Crouse Hinds GFS1 ENR5201 Ground Fault w/ Recepticle

Ferraz Shawmut OTS450amp Fuse  LOT OF3