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3805E
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多智能仪表控制系统的体系结构
1.1 一般DCS的体系结构
20世纪70年代中期以来过程计算机控制系统的发展进入以采用4C技术（计算机、通信、控制、CRT显示技术）为特征的集散型控制系统（DCS）的发展时期。从系统结构分析DCS可分为三大基本部分：分散过程控制装置部分、集中操作和管理系统部分以及通信系统部分。三部分的关系如图1所示。
功能分层是DCS的体系特征，它充分反映了集散控制系统的分散控制与集中管理的特点。按照功能分层的方法，多智能仪表控制系统可以分为现场控制站、过程控制站、控制级、生产管理站。
1.2 多智能仪表控制系统的体系结构
图1 DCS结构框图
（1）总体结构
如前所述，多智能仪表控制系统面向国内中小企业技术改造的需求，因此在将一般的DCS的各层功能综合后，我们提出了多智能仪表控制系统的网络结构，如图2所示。
现场级部件主要由智能仪表组成，控制PC机可由工控机组成，也可由普通PC机组成。智能仪表与控制PC机之间采用现场总线连接，现场总线协议应根据控制的要求和智能仪表的特点设计。管理级部件主要为商用PC机或其他计算机组成，其本身构成管理信息系统MIS（Management Information System）。管理PC机与控制PC机之间采用通用计算机网络联接，其具体种类可依据MIS系统组成的要求确定。
图2 多智能仪表控制系统的网络结构图
（2）智能仪表
内置微处理器的出现使智能仪表较传统仪表在设计方法、电路结构以及功能操作都发生了根本性的变化。在智能仪表中，除调节功能几乎完全由微处理器实现，微处理器是核心，在仪表软件的控制下有序地工作。在多智能仪表控制系统中，智能仪表和控制PC机之间交换的信息可分为：测量值；设定值；控制量；状态参数（一是反映智能仪表工作情况或生产情况的数值或0/1逻辑值，二是对智能仪表工作状态和参数的设置，最典型的是PID参数设置）。
（3）控制PC机
控制PC机主要用来实现集中操作和高级控制，是分散控制和管理PC机的集中管理之间的桥梁，一般完成显示与打印、控制管理与操作，系统配置组态的功能。
（4）管理级
要实现上述的控制目标，还必须进行更高层次的控制和管理。现代企业采用MIS系统来实现。
（5）现场总线
智能仪表和现场总线技术是密不可分、相辅相成的，目前国内智能仪表一般用的是通用型单片机如MCS-51系列。因此从技术实现、经济及生产实际上考虑，在采用诸多现场总线标准对于国企技术改造时，采用RS—485总线是较好的选择，多智能仪表控制系统即以RS-485总线作为通信协议的物理传输介质。
Allen Bradley AC Relay 700-P800A1 Direct Drive
Parker Hydraulic Pilot Check Valve CPOMPAAV (NIB)
Rosemount Alphaline Press Transmitter P/N 1151DP3E23B1 Supply 45 VDC (NIB)
Durametallic DBL INS R0-Dura Seal P/N 1363 B/M 71977 DMC, X3R, 1125 (NIB)
Baldor/Reliance Motor Cat #ECP3774T-4 10 HP Frame L021ST TEFC 460V 3 Phase (NIB)
HydroLine Cylinder LR5U2.5X5 B-1-2-N-X-U-V-1 (NEW)
Parker Fulflo Poly-Mate Filter Cartridge P/N PM010-10AS-TC (NIB)
NiTech Worthington Suction Chamber C22 #540844 316 S/S (NEW)
Kitz Ball Valve Figure: 300SCTAM-F3 1-1/2" 300# R/F Flange 226 PSI at 400F (New)
Allen Bradley Relay 700-HB32Z24-1-4 W/Base 24 VDC
Hubbell Insulgrip Twist-Lock Plug Cat #HBL2621 30A 250V 2 Pole 3 Wire (NIB)
Neptune Auto Stop Valve #100588-022 1" 150# Flange S/S (NEW)
Parker Pneumatic Cyl Series 2A #02.00CJBB2AUVS?14C10.00
Astec Power Supply ACV15D3.0 15VDC 110/220 47-63 Hz 2A
FulFlo Relief Valve CP11F300AR 4" 300# Flg 400# NEW
Parker Female Elbow 4-4-DBU-S 1/4" Flareless/NPTF (NEW)
Agastat Timer Model 7014AD 120V 60 Hz 5-50 Sec
Lambda Regulated Power Supply LNS-Y-15 105-127VAC 200W
Ferraz Micro Contact Micro Switch D310020C MC3E 15N NIB
Cooper Sure-Lites Emergency Exit #CCX30RWH 120/277V Dry locations Lamps Inc NIB
Southco Grab Handles B8-10-712-11 Lot of 4 (NIB)
Sola Rapid Start Ballast P/N E420-T-234 277V 60 Hz Class P Type 1 Outdoor (NIB)
Parker P5T Series Short Stroke Air Thruster (NIB)
GE Circuit Breaker Accessory TEDAS2AB2R Model #2 (NIB)
Steel City Edge Type Conduit Clamp 1" Lot of 4 (NEW)
DOPAK Needle Sampler #3034 S/S (NIB)
Steel City Edge Type Conduit Clamp 1/2" Lot of 3 (NEW)
Vibra Screw Isolator K37 ISOLPB0002 (NEW)
Halmar Robicon Power Controller 140P-FK2 80/480V 1P 40A
Waterson Food Grade Lined Hose 1" X 8' S/S Cam & Groove Female X Male Ends (NEW)
Wilden Pump Ball 55 P/N 4181 No. 55 3.25" Diameter (NEW)
Reliance Motor Model #P25G0591B 15 HP Frame 254T 230/460V 3PH X-Proof (NEW)
Tylan Mass Flow Controller FC-280AV N2 5SLPM 50PSIG NIB
Pyrex Lab Glassware #5640 25 mL +- .03 mL TC 20Deg C
John Crane T-32 Seal P/N CFD141806 4.500" XP90 1 042 1 (NIB)
GE Molded Case Circuit Breaker Cat #TED134100WL 100A 3 Pole 480 AC 250 DC (NIB)
Square D Breaker FAL12015 15 Amps 120V 125DC 1 Pole NIB
North American Mfg. Regulator P/N 7216-5-503 2-1/2" NPT (NEW)
Toshiba Power Supply KR972 5f930171 80 VDC (NEW)
Square D FHP Manual Starter P/N 2510FS1P With S/S Flush Plate (NIB)
PHD Magnetic Reed Switch Assembly P/N AN12-6 (NIB)
Flo Tronics Knife Gate Valve D15159 8" W/Air Actuator
Vibra Screw CP271409-T21-6 (NEW)
Advance Rapid Start Ballast Cat #VM-1P30-TP 277V 60 Hz (NIB)
Flowserve Nitriles Seal Kit for Actuators P/N B175SKB #RYN305079 (NIB)
ASCO Solenoid Valve Cat #8344G44MO 1/4" NPT 4-Way 120V 60 Hz 10-250 PSI (NEW)
VFD Cooling Fan Unit 3Ph 230/400 50Hz 1.15KW 2-Fan NEW
Swagelok S/S Pressure Gauge P/N PGI-100S-OG1000?-LAPX 1000 PSI 1/2" NPT (NIB)
PBM 3-Way Ball Valve C/S 1-1/4" S/W MPE35SW2P01 (NEW)
Mac Manifold Solenoid Valve Mod #45A-LAD-DAAD-4?BA 120/60 24 VDC 1/8 NPT 30-90#
SMC Pneumatic Cylinder CG1DA80-125 Max Press 1.0MPa NEW
Cashco Pneumatic Control Valve Mod #2266-12 P/N 424-6207-5 MWP 50 PSI (NIB)
Paco Pump Impeller Kit #1002474 12" OD 1.25" Shaft ASTM C876 Code 4368 (NEW)
Wedgewood Single Wave Length Flow Through Sensor #AF44VKQHNT1B3-?C No Detector
McCanna Ball Valve Fig #N151 S6 R S6 2" R/F 150# Flange CF8M Body 275 WOG (NEW)
Reliance AC Motor 2 HP ID #P14H5694R 208/230V 60 Hz 3450 RPM Fr HJ145TC (NEW)
ASCO Solenoid Valve Cat #SC8210GE7E S/S 2-Way N/C1/2" NPT 120/60 5-150# (NIB)
ITT Controls Hydromotor Valve Cat #H0V13A162T15 1/2" NPT 3-Way 120V 300WSP (NEW)
Contromatics Ball Valve Mod #2801212K 4" 150# Flg CWP 275# Ball/Stem S/S (NEW)
ASCO Solenoid Valve Cat #EF8223G10 S/S 2-Way 1/2" NPT N/C 24 VDC 25-500# (NIB)
Whitey Integral Bonnet Needle Valve P/N SS-20KM4-F4 1/4" NPT MXF 6000 PSIG (NEW)
ITT Dia-Flow Diaphragm Valve P/N 020-4796-903-00?M 2" S/S Body Weld Ends (NEW)
Love Joy S Flex Cpling 6SFLNG 68514436093 5/8 W/Kw NIB
Honeywell Change Over Thermostat #T678C 1021 Trane #13540745 Range: 55-85F (NIB)
Modus Instrument Pressure Transmitter Model #T30-001 0-0.1 Inches of Water (NIB)
ISO KF Flange Clamp DN32-40 KF Flange Lot of 10 (NEW)
Crane Chempump Stator Assembly Mod #GC-3K-152H-1S 460V 60 Hz 3Ph 3450RPM 4.4 KW
GVI Foxboro Gate Valve Assembly for Sensor Insertion P/N 51351 1" NPT S/S (NEW)
Foxboro Gauge % Meter P/N NO143TR 0-100% Output 1/2" NPT (NEW)
ITT Sanitary Rupture Disk Assembly P/N CSS-0108-S171 1-1/2" W/Continental Disk
Colonial 3" CPVC Flange Schedule 80 (NEW)
Sporlan Thermostatic Expansion Valve PVE12G (NIB)
Rosemount Sanitary Flow-Thru Lined Sensor Assembly Mod #222 1" Flg Model 2081
Westinghouse C-71 Voltmeter 409C567A15 0-150 VAC (NIB)
Bodine Electrical Heat Rotator Gear Motor 24A2BEPM-D3 13 VDC 83 RPM 18 LB-IN
Aeroquip TTC12 Female JIC Swivel Fitting 1BA12FJA12 NEW
Henry 3-Way Shut-Off Valve Cat #8021 A 1/2" FNPT F/S Ammonia 450 WOG (NIB)
Milwaukee S/S Ball Valve Fig #F90SS150R-02-G?B 1" 150# Flange CWP 275 PSI (NEW)
Arrow-Hart Single Pole Switch P/N AH1221 20A 120-277 VAC (NIB)
CR (Chicago Rawhide) Oil Seal 7440 (NIB)
Magnetrol Liquid Level Switch Porclein Displacers P/N A10-1G2A-AAH 1 Set of 2NEW
JO-Bell Magnetic Proximity Switch Cat #TA-3W (NIB)
Crouse-Hinds Factory Sealed X-Proof Cover W/Pilot Light/Switches #DS514J1 (NIB)
Arrow-Hart Single Locking Receptacle P/N 6340 NEMA L6-30R 30A 250V 2P 3W (NIB)
Rosemount 1151 Smart DPT W/Manifold P/N 1151DP3S33B2 0-6" H2O 45 VDC 2000# (NIB)
Anderson Greenwood Needle Valve H7HC4Q02-4076 1/2" NEW
Ace Glass RTD Temperature Controller Cat #12103-05 20/40/120V Output 120V Input
Lightnin Mixer Kit 831194-PSP (NEW)
Flexitallic Blue Spiral Wound Gasket 37"IDX38-1/8OD NEW
Veriflo Cal Gas Delivery Gauge DIR601304 P/N41500697NIB
Advanced Technologies Teach Pendant Model 80EL45EKR2-1
Burndy Tap Connectors P/N BIBS4-4 14 AWG - 4 AWG AL9CU (NEW)
Spirax/Sarco S/S Steam Trap P/N MT21 1/2" FNPT NTS (G) MST 21 TMA 400C (NIB)
Rexnard/Stearns Spring Set Disk Brake Mod #108733100MQB 230/460 Torque 25# (NIB)
Baldor D/C Motor #S020/0293 Type: SH5320D 3/4 HP Frame : 56 2400 RPM Arm 180V NIB
Watts Ball Valve #D031 1" NPT CF8M S/S W/Spring Return Handle #BV9BA3-R (NEW)
Grayhill Rotary Switch #M3786/4-5037 5139623501 (NIB)
United Electric Thermostat E122 M9BB X-Proof 540-1000F
GE Photo Electric Scanner 3S7505PS510C6 (NIB)
DE-STA-CO Pull Toggle Clamp 323-MSS (NIB)
Flowserve S/S Pump Impeller #12E08-24995 #51157A 6.5" OD (NEW)
Nelson Electric Nelex Temperature Control #719X250 100-250F X-Proof NEMA 7 (NEW)
Numatics Solenoid Valve Mod # S23II452BP 14.5-120 PSIG 1-8 Bar 24 VDC (NIB)
Chicago Blower 22" DCP-22-9EJ-1.5-?1750 1.5 HP 3P
Tylan PS-14 Power Supply P/N PS-14-115 115 Volts
Micro Switch X-Proof Snap Switch Mod 4CX3 7845 (NIB)
ABB Line Starter A16S-84R M314090 110/50 110-120 60 NIB
PBM GEMU Controlled Sanitary Ball Valve 1"BWX1-1/2"BWX1?"Tri-Clmp Dwg's/MTR's NEW
Hermco Pneumatic Herculift Cylinder LWC18CVG180 (NEW)
Allen Bradley Power Flex AC Drive Cat #20A D 2P1C 3 AYNANCO 480V 1 HP 3 Ph (NEW)
Wilden S/S Pump Water Chamber #85 P/N 1424 1-3/8" Opening 6-3/4" OD 316 S/S NEW)
Worcester/Flows?erve Valve W/Pneumatic Actuator #E4446PMSW 1/2" S/W 1480# (NEW)
Wedge Type Concrete Anchors 3/4" X 4-1/4" Thread Length 1-3/4" Lot of 10 (NEW)
Boston Gear Locking Collar SC200 67727 Frazier (NIB)
Swagelok Reducing union SS-1610-6-12 1"X3/4" Swage NEW
Allen Bradley Line Starter 709-A0D103 Series K 200/230V 3HP 460/575 5HP 120 Coil
VOGT Globe Valve Series #SW12141 1/2" S/W A105 Body 1975 PSI at 100F (NEW)
Tobar Pressure Transmitter 75FE21100/43212?.43211.D1 3600# 3" Flg 0-250 IWC (NEW)
Marcus Transformer Cat #MO200J 200 VA Pri 600V 60 Hz Sec 120/240V 60 Hz (NIB)
Barksdale Pressure/Vacuum Actuated Switch P/N D1H-H18SS AC/DC 1/4" NPT (NIB)
Bussman Fuse Block P/N T60100-3C 100A 600V Class T Fuse Only (NEW)
GE Druck Rangeable Pressure Transmitter RTX1000 0-7 Bar
Hydro-Line Hydraulic Cylinder LAN5E-2.5X16 (NEW)
Square D Position Selector Switch Kit P/N 9999SC22 Size 00-4 Type S Series B NIB
MIKI Pulley Co. Coupling Assembly SFS-09S (NIB)
Ohmite Rheostat P/N RJS 10K .071A 10,000 Ohms (NIB)
FIKE Rupture Disk 6" INC Type BT 208 PSIG @ 72F (NIB)
Altech Conta 15A 600V STK1 Clip Terminal (NEW)
Carlton Bates Company 193 Stand-Offs P/N 1637 (NEW)
Triac Actuator Rebuild Kit TR850DA (NEW)
LoveJoy 7SCH SPCR Hub 59566 35mm 10X3.3 MMK (NIB)
Federal Signal Connector Mod #300CKS (NIB)
SMC Pneumatic Cylinder CM2RA20-25 145PSI Max (NEW)
Elbow 3/4" NPT 304 Stainless Steel Removed From New Equipment Lot of 7
Parker 80-100mm Viton Gland Kit RG0MP00255 (NIB)
Krohne (Altometer) Housing #IFC-090K/D/HAR?T/6/LAS2/S (NEW)
John Crane Mechanical Seal Assembly 4.5 In. SMD. QBW Dry Contacting Seal (NIB)
Micro Motion Circuit Board P/N 0203832 Drive Board For DUL115-AF (NEW)
Browning Chain Sprocket H40 12X5/8 (NIB)
Parker union Elbow 6-EBU-SS Stainless Steel (NEW)
Parker BSP Taper Hose Fitting 39182-8-8 1/2"X1/2" (NEW)
Fafnir Bearing #9111PP (NIB)
Brady All Purpose Cable-Lockout 8' Modified Glass Filled Nylon Cable #50941 NIB)
Warning Signs DANGER NO SMOKING 20'X14" Lot of 6
Marsh Pressure Gauge H4254 0-200 PSI 4-1/2" Dial NIB
Allen Bradley SLC 500 Analog Input Module Cat #1746-N18 Series A (NIB)
Cutler Hammer Transformer V48M11S67D 167 KVA 1P 480/240
IDM Controls Powrmaster Speed Control #G3U42P2N1 3 HP Input 380-460V 3P (NIB)
Eaton Dynamatic Adjustable Frequency AC Drive #AF150202-0240 2HP 200-230V (NIB)
Foxboro Pressure Transmitter Mod #IGP20-AS3D01F W/Conoflow Sanitary Flange (NEW)
Reliance AC Variable Speed Drive GP-2000 M/N 2GU41003 4.2 KVA 3 HP 460V 3P (NEW)
Reliance AC Variable Speed Drive GP-2000 M/N 2GU41005 6.5 KVA 5 HP 460V 3P (NEW)
ASI Robicon Rotating Rectifier Assembly 257675 (NEW)
Rexnord Coupling 226DBZ-B/DBZ-B-?226 (NIB)
ASCO Solenoid Valve Cat #821540 3" FNPT 120V 0-5 PSI Air/Gas (NEW)
Numatics Solenoid Pilot Valve 153RS115J 24 VDC (NIB)
Aeroquip Quick Disconnect S/S Coupling P/N FD45-1004-16-16 1" FNPT X Male (NIB)
John Crane Front Bearing Housing #7844 7-1/4" OD 1-3/4" ID (NEW)
Ashcroft Pressure Switch P/N LDSN4GB25 XK3 125/250/480 VAC 125 VDC 30" H2O (NIB)
Kepco/TDK Power Supply FMP5-2K A/C Input 120V D/C Output 5V (NIB)
Keckley Brass Wye Strainer 1" NPT #100 Mesh S/S Basket 1/2" NPT Clean-Out (NEW)
LUWA Filter FP-95-610-HT Series 4800 24X24X12" Class F8EN779 Penetration 93% NIB
Ross Control Valve Model #W7077A2331 120V 60Hz 2-10Bar
Honeywell PCB Module #621-1160 115 VAC Input 16 Point (NIB)
Tri-Clover S/S Sanitary Stub End 3.50" OD Flange Face 5.0" 2.5" End to Face NEW
Durco/Flowserve S/S Plug Valve Fig #6411 P/N BT40704A 1" 150# Flange CF8M (NEW)
Harnischfeger (P&H) Thermal Overload Relay 4079Z20 NIB
Robicon Board Clamp 362590 (NIB)
Advanced Sealing Tech Mechanical Seals 15197 80339 NIB
SMC Pneumatic Brake Cylinder CLALN100400ND (NEW)
Yamakyu Chain Tightener SP415-BB (NEW)
Banner Scanner Block #F1 Multi Beam Model (NIB)
HydroLine Reed Switch PS7-04 (NIB)
Cooper Bussman Fuse NOS-400AMP 600VAC Class H (NEW)
Shelco S/S Filter Housing Mod #CSF-788-222-1F?-EP 1" 150# Flg 300 PSI (NEW)
Moore Booster Relay Mod #61F B/M7200S16JL (NEW)
ACI/Bremas Drum Switch P/N CW0177860S35 (NIB)
Sierra Sentry Printer Model 5301 115V, 4 Watts
Electronic Measurement Dekavider DV-412 Input 250Volts
Parker S/S Male Connector 10-FBUSS Flareless/NPTF (NEW)
Parker Pneumatic Cylinder 6.00CBB2AUVS14A?C2.00 NEW
Rexroth Piston Tube & Seal Kit P-106884-K0000 (NIB)
Swagelok Whitey Valve SS-6NTRS6 Severe Service union Bonnet 3/8" Tube (NIB)
Square D FHP Manual Starter P/N 2510FG2P Series A NEMA 1 W/Pilot Light (NIB)
Parker Pneumatic Filter P/N 07F21AC 3/8" NPT 150 PSI Max 125F Max (NIB)
Siebe Control Valve Body VB-7221-000-4-4 1/2" NPT 4.4 Cv 2-Way union End (NIB)
ITT Ball Valve #030-3011-101-4 3" CF8M S/S 150# R/F Flange 275 CWP 500F (NEW)
Spencer Turbine LF Blower Impeller #1 05-96-341 Dia 25" X 7/8" 2.5" Shaft (NEW)
Numatics Manifold Base 229.880 (NIB)
Hubbell Midget Twist-Lock Flg Receptacle #HBL7596 15A 125V 3 Wire Grd Lot 2 NIB
Dixon 1-1/2" Camlock Female to Hose Barb 5069 (NEW)
MSA Display Board For Ultima Infrared Gas Monitor P/N 814087 (NEW)
