我們新研制出一種用于紙漿白度測定的智能白度儀，該儀表采用西門子公司生產的S7-224 CPU結合軟件功能進行數據處理，具有較好的可靠性、重復性、精確度和穩(wěn)定性。為了使其能與其它智能設備之間實現通信，我們將通過現場總線技術把它連接到網絡中，使它成為造紙廠現場總線控制系統(tǒng)的一部分。
2.現場總線的選擇
2.1現場總線技術的選擇
現場總線集控制技術、計算機技術、通信技術于一體，是當今自動化領域技術發(fā)展的熱點之一。這項技術可將多個智能控制儀表連接成網絡系統(tǒng)，實現分布式計算機控制，提高檢測和控制精度，改善系統(tǒng)的動態(tài)響應速度，提高系統(tǒng)安全性，從而得到了廣泛的應用。
近年來，幾種有影響的現場總線技術已在一些特定的應用領域里顯示出各自的優(yōu)勢。在此，我們選定了現為德國和歐洲標準的PROFIBUS（Process Fieldbus）現場總線。一方面由于它是目前數據傳輸率快的一種現場總線，傳輸率高可達12Mbps，另一方面它能夠很好的與西門子的傳動設備相配合，并與西門子PLC（Programmable Logic Controller）結合緊密且組態(tài)簡便。
2.2 PROFIBUS現場總線簡介
參照ISO/OSI參考模型,PROFIBUS現場總線只包含物理層、數據鏈路層和應用層。由PROFIBUS-DP，PROFIBUS-FMS， PROFIBUS-PA組成PROFIBUS系列。
PROFIBUS-DP：經過優(yōu)化的高速、廉價的通信連接，專為自動控制系統(tǒng)和設備級分散I/O之間通信設計，使用PROFIBUS-DP模塊可取代價格昂貴的24V或0～20mA并行信號線。用于分布式控制系統(tǒng)的高速數據傳輸。
PROFIBUS-FMS ：解決車間級通用性通信任務，提供大量的通信服務，完成中等傳輸速度的循環(huán)和非循環(huán)通信任務，用于紡織工業(yè)、樓宇自動化、電氣傳動、傳感器和執(zhí)行器、可編程序控制器、低壓開關設備等一般自動化控制。
PROFIBUS-PA專為過程自動化設計，標準的本質安全的傳輸技術，實現了IEC1158-2中規(guī)定的通信規(guī)程，用于對安全性要求高的場合及由總線供電的站點。
本設計中采用的是PROFIBUS-DP標準，PROFIBUS-DP（或DP標準）是由歐洲標準EN50170定義的一種遠程I/O通信協(xié)議。DP表示分布式外圍設備，亦即遠程I/O。PROFIBUS-DP還用到了應用層接口（ALI），ALI將過程對象轉換為通信對象。
ITE/Siemens B230 Circuit Breaker *USED*
MGM 750 KVA Substation 13800 x 480 3 Phase Dry Type
Kohler 100 KW 3 Phase 277/480 Volt Genset
Square D LC36400, I-Line Circuit Breaker
Ward 750 KVA 13800 x 120/208 Padmount Transformer
Interstate 750 KVA 13800 x 480/277 Padmount Transformer
General Electric 250 Watt HPS Cobrahead M250R2
(10) P & S 690-IG Ivory Combination Device 2-SP switche
Distran Scale Rangematic Distance Finder
TIF 8800A Combustible Gas Detector
Makita 6095-D 9.6 Volt Battery Drill
Greenlee Model 93-1065 Light Meter
Greenlee/Kellem?s Large Pulling Basket 4.00 - 4.40 Inch
50' Extension Cord 12/3 Copper Triple Plug NEW
Rotary Phase Converter System 460 Volt
170 KW 3 Phase 277/480 Volt Natural Gas Genset
KEB F4 Frequency Invertor
Geist Surge Protector Monitor Plug Strip
Geist Power Monitor Cord Strip #SPCN104-1025TL
ITE CC1B020 20 Amp 1 Pole 277/480 Volt Circuit Breaker
ITE CC3B015 15 Amp 3 Pole 277/480 Volt Circuit Breaker
ITE KPB3F120 1200 Amp 3 Pole Circuit Breaker
Siemens PXD63B160 1600 Amp 3 Pole Circuit Breaker
ITE CJD63B300 300A 3P Circuit Breaker
75VA 100/110/120 X 24 VCT Liebert E-007D TRANSFORMER
ACME 1 KVA 1PH 380/600 X 115/230 CAT# TA-2-81241, NEW
15 KVA 3PH 480X120/208 DRY TRANSFORMER *USED*
Step Down Transformer 75 KVA 3 Ph 240X480 TO 120/208
Siemens HLD63F600 500 Amp Circuit Breaker w/ 500A Trip
ITE QJ2-B150 150 Amp 2 Pole 240 Volt Circuit Breaker
ITE QJ2-B125 125 Amp 2 Pole 240 Volt Circuit Breaker
ITE QJ22B225 225 Amp 2 Pole 240 Volt Circuit Breaker
ITE QJ22B150 150 Amp 2 Pole 240 Volt Circuit Breaker
ITE QJ22B125 125 Amp 2 Pole 240 Volt Circuit Breaker
ITE QJ3-H150 150 Amp 3 Pole 240 Volt Circuit Breaker
ITE QJ2-H150 150 Amp 2 Pole 240 Volt Circuit Breaker
Siemens B130 Circuit Breaker
Siemens B120 20 amp Circuit Breaker
ITE/Siemens B350 Circuit Breaker
ITE/Siemens QJH23B150 Circuit Breaker
ITE/Siemens QJH23B200 Circuit Breaker
Siemens QJ23B225H Circuit Breaker
ITE/Siemens EE3 B10000S01 100 amp shunt trip breaker
ITE/Siemens EE3-B050 Circuit Breaker
ITE/Siemens EE3-B040 Circuit Breaker
Acme 150 KVA 3ph 600/347 X 480/277 Cat #T-2A-52713-1
(6) ITE/Siemens B220 Circuit Breakers *NEW*
ITE/Siemens BF120 GFI Circuit Breaker
Westinghouse QBGF1020 Type BA 1p 20a Circuit Breaker
Cutler Hammer BAB3015 Type BA 3p 15a Circuit Breaker
Cutler Hammer BAB2030 Type BA 2p 30a Circuit Breaker
Westinghouse BAB2030 Type BA 2p 30a Circuit Breaker
Westinghouse BAB1015 Type BA 1p 15a Circuit Breaker
Cutler Hammer BAB1015 Type BA 1p 15a Circuit Breaker
Square D QO320 Black Face Circuit Breakers
Shawmut TRS200R
Shawmut TRS200R
Siemens B120 Circuit Breakers *NEW*
Westinghouse BAB1020 Type BA 1P 20A Circuit Breaker
Cutler Hammer BAB1020 1P 20A Circuit Breaker type BA
Westinghouse QBGF1020 1P 20A Circuit Breaker type BA
Cutler Hammer QBGF1020 1P 20A Circuit Breaker type BA
(10) Square D QO115 Circuit Breaker
(10) Square D QO120 Yellow Sq Circuit Breakers
10 Square D QOB120 Yellow Sq Circuit Breaker
Cutler Hammer CH115 Full Notch Circuit Breaker
Acme T-2-53113-15, 3 KVA 1ph 600X120/240 Transformer
Square 5kva 1ph 600 X 120/240 CAT# 5S4F Transformer NEW
Asco Redhat 82106002 Shut Off Valve
Honeywell PTCC 9515 Micro Switch Contactor
Allen Bradley 1A06 Coil
Telemechanique LC1D12B7 Contactor
Square D 15S5H 15 KVA 1PH 600 X 120/240 Transformer NEW
Edwards 876-G5 Weatherproof Horn
Edwards 340-4N5 Adaptabel
Advance Centium Ballast, ICN-4P32-5C
(5) Philips MH400/U Metal Halide Lamps
1500 Watt Quartz Fixture
RAB 500 Watt Quartz Flood Light, Cat #QF500
Honeywell 198162EA Transformer
Cutler Hammer Def. Purpose Contactor, C25ENED425A
Advance REL-4P32-3C 120 Volt Electronic Ballast
Furnas Size 2.5 Starter, Open Type, 146P32AA71
Square D MB NQOD Panelboard, 225 Amp, 1 Phase
Square D NF430L2C MLO Panelboard, 250 Amp,
Edwards 874-G5, 240 Volt Horn
FSC 121S-120A Rotating Amber Beacon
Omega CN8261-F1 Process Controller
EGS Hevi Duty HS10F7.5AS, 7.5 KVA Transformer
Square D 2S51F, 2 KVA 1PH 600 X 120/240 Transformer NEW
Square D 3S4F, 3 KVA 1PH 600 X 120/240 Transformer,NEW
Square D FA340601021 Circuit Breaker With Shunt Trip
Square D KA362251021 Circuit Breaker With Shunt Trip
Square D FJA34100 Circuit Breaker
Square D KC34225 Circuit Breaker NEW
Square D KC34200 Circuit Breaker
Square D FDA34030 Circuit Breaker
Square D FDA34100 Circuit Breaker
Square D Q232125H Circuit Breaker
Cutler Hammer LT20425 Panel Board Cover
Cutler Hammer LT20365 Panel Board Cover
Square D FAL34060, 60 Amp Circuit Breaker
Square D FCL340801021, Circuit Breaker w/ Shunt Trip
Square D FAL340601021, Circuit Breaker W/ Shunt Trip
Cutler Hammer CP4SBC510A2, 1000 Amp Tap Box
Cutler Hammer PRL-1A, 225 Amp MLO Panelboard (Interior)
Cutler Hammer PRL-1A, 400 Amp MLO Panelboard (Interior)
Cutler Hammer LTEZV2036SF Panel Board Cover
Cutler Hammer LTEZV2048SF Panel Board Cover
Square D HU366, 600 Amp, 600 Volt Non Fused Disconnect
Cutler Hammer LTDD2060S Panel Board Cover
Cutler Hammer LTDD2048F Panel Board Cover
Hubbell 460R7W,60 Amp Pin & Sleeve Recepticle
Hubbell 4100R9W, 100 Amp Pin & Sleeve Recepticle
Hubbell 4100R7W, 100 Amp Pin & Sleeve Recepticle
Levitron 560R9W, 60 Amp Pin and Sleeve Recepticle
Hubbell 560R9W, 60 Amp Pin & Sleeve Recepticle
Square D EHB34040 Circuit Breaker *NEW SURPLUS*
Cutler Hammer LTDD2048S Panel Board Cover
Cutler Hammer LT20485 Panel Cover
Allen Bradley Size 5 Starter, 509-FOD *USED*
Allen Bradley Size 6 Starter, 509-G0B *USED*
General Electric Size 5 Contactor, CR305GO**CAKH
General Electric Size 6 Contactor, CR305HHD**BA1H
Cutler Hammer HPG49755-A01, 800 Amp Tap Box
Siemens 4300 Power Meter *USED*
15 KVA, 1 Phase, 240x480 X 120/240 Volt Transformer
GS Hevi Duty 63 KVA SCR Drive Trans,460X460Y/?266, 3 Ph
Siemens 30 KVA Transformer, 480 x 120/208 Volt
Square D 45 KVA, 480/277 x 208 Volt Transformer
Federal Pacific 37.5 KVA,480X120/208 3 Ph, Trans
Square D HU368, 1200 Amp Disconnect *NEW SURPLUS*
GE 25 KVA Transformer, 1 Phase 600X120/240 volt
Westinghouse 25 KVA Transformer, 600 x 120/240 Volt
ACME 25 KVA,600X120/240?, 1 Phase Trans
GS Hevi Duty 7.5 KVA, 575X575/332, 3 Ph Trans
REX 25 KVA, 1 Ph, 600X120/240 Volt Trans
Marelco 55 KVA Transformer, 3 Phase, 208x240 X 400 Volt
Federal Pacific 10 KVA 240X480X120/240?, NEMA 3R, 1 Ph
Jefferson 25 KVA, 480X120/240, 1 Ph Trans *USED*
Square D 225 Amp Main Lug I-Line Panelboard *USED*
Federal Pacific 15 KVA, 3 Ph 480X460Y/277 Transformer
GS Hevi Duty Electric 25 KVA 575X120/240 1PHTransformer
GE 150 KVA 600X277/480 Transformer, 3 Phase
Hitran 27 KVA, 3 Phase, 208 x 120/208 Transformer
Sq D 15 KVA 600X120/240 Transformer, 1 Phase
Siemens SX312A10PL10, 1600 Amp Bus Duct *USED*
Siemens R310APG, 1000 Amp Bus Duct *USED*
Siemens SX312A10PL10, 1200 Amp Bus Duct *USED*
Square D 15 KVA, 1 Ph 600X120/240 Trans *NEW*
Square D 225 KVA Transformer, 3 Phase, 480 x 240 Volt
Sorgel/Square D 150 KVA Transformer, 600 x 120/208 Volt
MGM 150 KVA Transformer, 480 x 240 Volt, 3 Phase
Westinghouse 75 KVA Transformer, 600 x 120/208 Volt
REX 50 KVA 1 Phase 575x120/240 Transformer
Square D 45 KVA Transformer, 3 Phase, 480x480/277 Volt
Federal Pacific 15 KVA 3 Ph 480 X 460Y/126 DRY TRANS
General Electric 15 KVA, 3 Ph 208X120/208 Transf *USED*
Hammond 15 KVA, 480X120/208 NEMA 3R, 3 Ph Trans*USED*
Hammond 112.5 KVA,3PH 480X120/208 NEMA 3R,Trans *USED*
Hammond 45 KVA,480X120/208 NEMA 3R, 3 Ph Trans *USED*
Hammond 30 KVA,480X120/208 NEMA 3R, 3 Ph Trans *USED*
Hammond 75 KVA,480X120/208 3 ph NEMA 3R Trans *USED*
GE 45 KVA 3PH 208X120/208 Cat #9T23B3093 DRY TRANS
Cutler Hammer 30 KVA 3PH 480 X 120/208 V48M28T30EE NEW
Square D 800 Amp I-Line Main Lug Panelboard
Square D 225 Amp, NQOD Main Lug Panelboard *USED*
ITE CE3-B100, 100 Amp Cordon Circuit Breaker NEW IN BOX
ITE CE3-B020, 20 Amp Cordon Circuit Breaker *NEW IN BOX
ITE CE3-B030, 30 Amp Cordon Circuit Breaker *NEW IN BOX
ITE HE3-B100, 100 Amp Circuit Breaker
ITE JL3-T225 Trip Unit
(5) Buss NOS80 Fuses
(10) Gould/Shawmutt TR20R Fuses
(5)Shawmutt TR100R Fuses
Gould/Shawmut TRS-150R, 150 Amp Fuse *NEW*
GE LU70, Lot of 12** High Pressure Sodium Lamp *NEW*
ITE FJ3-B225, 225 Amp Circuit Breaker
Square D EHB34030 Circuit Breaker *NEW SURPLUS*
Square D EHB34015 Circuit Breaker *NEW Surplus*
NEMA 4 Dual 5 HP Pump Control Panel *USED*
Siemens W4242L3225CU, Weatherproof Load Center
Adalet XCE101408 Explosion Proof Junction Box *USED*
Adalet XCE121208 Explosion Proof Junction Box *USED*
Hoffman A8H12ALP, NEMA 12 Jic Box *NEW SURPLUS*
Weighman N12303012, Nema 12 Enclosure *NEW SURPLUS*
Cooper 225 KVA 3PH 13800 X 120/208 PAD MOUNT NEW
Air Compressor Products, #028-158DP3 *USED*
SQUARE D PXF361600G Main Circuit Breaker Switchboard
Cooper 75 KVA 1PH 13800GY/7979 X 120/240 NEW PAD MOUNT
RTE 100 KVA 1 Ph13800 X 120/240 Padmount Transformer
RTE 50 KVA 1 Ph 13800 X 120/240 Padmount Transformer
Cooper Padmount Transformer, 167 KVA, *USED*
Cooper 100 KVA 1 Ph 13800GY/7970 X 120/240 PAD MOUNT
RTE 75 KVA 1 Ph 13800 X 120/240 Padmount Transformer
Hoffman A30P24SS6 Enclosure Back Plate
Siemens B220 Circuit Breaker 2p 20 amp
ITE/Siemens B240 Circuit Breaker *USED*
Siemens B250 Circuit Breaker
ITE/Siemens B320 Circuit Breaker
ITE/Siemens B3100 Circuit Breaker *USED*
ITE/Siemens B360 Circuit Breaker *USED*
ITE/Siemens B330 Circuit Breaker *USED*
ITE - ET 225amp "K" Frame 225 amp Circuit Breaker USED
ITE - ET 225amp "K" Frame 200 amp Circuit Breaker USED
ITE - ET 225amp "K" Frame 175 amp Circuit Breaker USED
ITE -ET 100 "F" Frame 20 amp Circuit Breaker *USED*
ITE -ET 100 "F" Frame 50 amp Circuit Breaker *USED*
ITE -ET 100 "F" Frame 70 amp Circuit Breaker *USED*
ITE -ET 100 "F" Frame 90 amp Circuit Breaker *USED*
ITE JL63F400, 200 amp Circuit Breaker *USED*
ITE JL63F400, 250 amp Circuit Breaker *USED*
ITE JL63F400, 300 amp Circuit Breaker *USED*
Siemens Q120 Circuit Breaker *USED*
Siemens B120H Circuit Breaker
GE DFPTQL4 50amp Bus Plug *USED*
Siemens SN426 600 Amp Fused Disconnect *USED*
Square D KAL362001021 Circuit Breaker, Grey Label *USED
Square D KHL36200 Circuit Breaker, Grey Label *USED
Square D KHL36225 Circuit Breaker, Black Label *USED
Square D KHL362251212 Circuit Breaker, Grey Label *USED
Square D KHL3625025DC161?6 Circuit Breaker *USED*
Square D KHL362501291 Circuit Breaker *USED*
Square D KHL36250 Circuit Breaker *USED*
Square D KCL34150 I-Line Circuit Breaker *USED*
Square D KCL34225 I-Line Circuit Breaker *USED*
Square D KA36150 Circuit Breaker, Grey Label *USED*
Square D KA36125 Circuit Breaker, Grey Label *USED*
Square D KA36175 Circuit Breaker, Grey Label *USED*
Square D KA362001021 Circuit Breaker, Grey Label *USED*
Square D FC34100 Circuit Breaker *USED*
Square D KC342251021 Circuit Breaker w/ Shunt Trip USED
Square D KC34225 Circuit Breaker *USED*
Square D FC34030 Circuit Breaker *USED*
Square D KC34175 I-Line Circuit Breaker *USED*
Square D KC34110 I-Line Circuit Breaker *USED*
Square D KAF361251143 Circuit Breaker *USED*
Bryant BRWH230 Tandem 2 Pole Circuit Breaker *USED*
Bryant BRSN220 Switch Neutral Circuit Breaker *USED*
Bryant BR230 Bolt On GFI Circuit Breaker *USED*
Bryant BR120 Bolt On GFI Circuit Breaker *USED*
Bryant BR115 Bolt On GFI Circuit Breaker *USED*
Bryant BR230 GFI Circuit Breaker *USED*
Bryant BR215 GFI Circuit Breaker *USED*
Bryant BR120 GFI Circuit Breaker *USED*
Bryant BR140 Circuit Breaker *USED*
Bryant BR130 Circuit Breaker *USED*
Bryant BR120 Circuit Breaker *USED*
Square D FAL24045 Circuit Breaker, Grey Label *USED
Square D FAL36040 Circuit Breaker, Grey Label *USED
Square D FAL34030 Circuit Breaker, Grey Label *USED
Square D FAL34025 Circuit Breaker, Grey Label *USED
Square D FAL34020 Circuit Breaker, Grey Label *USED
Square D FAL34015 Circuit Breaker, Grey Label *USED
Square D FA3600712M Circuit Breaker, Black Label *USED
Square D FAL360801017 Circuit Breaker, Grey Label *USED
Square D FAL341006471 Circuit Breaker, Grey Label *USED
Square D FAL360251212 Circuit Breaker, Grey Label *USED
Square D FAL360801143 Circuit Breaker, Grey Label *USED
Square D FAL341001212 Circuit Breaker, Grey Label *USED
Square D KAL36125DC1616 Circuit Breaker, Grey Label
Square D KAL36175DC1680 Circuit Breaker, Grey Label
Bryant BR350 Circuit Breaker *USED*
Bryant BR340 Circuit Breaker *USED*
Bryant BR330 Circuit Breaker *USED*
Bryant BR320 Circuit Breaker *USED*
Bryant BR315 Circuit Breaker *USED*
Bryant BR270 Circuit Breaker *USED*
Bryant BR260 Circuit Breaker *USED*
Bryant BR250 Circuit Breaker *USED*
Item title
Bryant BR230 Circuit Breaker *USED*
Bryant BR225 Circuit Breaker *USED*
Bryant BR220 Circuit Breaker *USED*
Bryant BR215 Circuit Breaker *USED*
Bryant BR115 GFI Circuit Breaker *USED*
Bryant BR3100 Circuit Breaker *USED*
Bryant BR370 Circuit Breaker *USED*
Bryant BR360 Circuit Breaker *USED*
Square D QOU230 Circuit Breaker *NEW TAKE OUT*
Square D QOU220 Circuit Breaker *NEW TAKE OUT*
Bryant BR115 Circuit Breaker *USED*
Joslyn 1261-49-R-TT Transient Voltage Surge Suppressor
Ferraz Shawmut 67575 Terminal Block *NEW TAKE OUT*
Square D QOU240 Circuit Breaker *NEW TAKE OUT*
Siemens HNF361 30 Amp Non Fused Disconnect *USED*
ITE/Siemens F351 30 Amp Fused Disconnect *USED*
ITE F354 200 Amp Fused Disconnect *USED*
Cutler Hammer DH362FRK 60 Amp Fused Disconnect
Temporary Job Site Electrical Service **USED**
Challenger HD321SN 30 Amp Fused Disconnect
Square D QOM100 Circuit Breaker **USED**
Square D FA36080 Grey Face Circuit Breaker *USED*
FPE 500 KVA, 480x240, 3 Phase Transformer *USED*
Square D Q2M3225MT Circuit Breaker
Square D LA36400 Circuit Breaker *NEW TAKE OUT*
Square D FH36030 Circuit Breaker *NEW TAKE OUT*
Square D FH36100 Circuit Breaker *NEW TAKE OUT*
Square D FH26015AB Circuit Breaker
Square D FH26015BC Circuit Breaker
Square D FH26015AC Circuit Breaker
Square D FH26040AC Circuit Breaker
Square D FH36060 Circuit Breaker
Square D FH36025 Circuit Breaker
Square D MAL266001390 Circuit Breaker *NEW TAKE OUT*
Square D MHL361000 Circuit Breaker *NEW TAKE OUT*
Square D MHL3612001288 Circuit Breaker *NEW TAKE OUT*
Square D MA26600AC Circuit Breaker *NEW TAKE OUT*
Square D MHL3612001288 Circuit Breaker *NEW*
Square D FA26020AC Circuit Breaker *NEW*
Square D EGB34070 Circuit Breaker *NEW TAKE OUT*
Square D QO3151021 Circuit Breaker
*BOX OF 5* Square D QO215 Circuit Breaker
Square D QO2100 Circuit Breaker
Square D HOM2100 Circuit Breaker
Square D HOM120AFI Circuit Breaker
Square D HOM115AFI Circuit Breaker
Square D QOB120 Circuit Breaker *NEW TAKE OUT*
Square D QOB115GFI Circuit Breaker
Square D QOB130GFI Circuit Breaker
Square D QOB120GFI Circuit Breaker *NEW TAKE OUT*
Square D QHB120 Circuit Breaker
Square D QOXD150 Circuit Breaker
Square D QOB120VH Circuit Breaker
Square D QOB320VH Circuit Breaker
Square D QOB3100VH Circuit Breaker
Square D Q12100VH Circuit Breaker
Square D QOB340VH Circuit Breaker
Square D QOB215VH Circuit Breaker
Square D QOXD120 Circuit Breaker
Square D QOB2100VH Circuit Breaker
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