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为更充分地使用DCS资源，提髙控制系统的安全可靠件。本系统除具有常规三冲量液位调节系统的基本功能外，还具备以下功能：
(1)单冲量/三冲黾自动切换功能
在液位、给水、蒸汽三个信号均正常时，调节器处于三冲量调节状态。当给水或蒸汽两佶号中任意一个异常时，DCS自动地从三冲里调节状态切换到单冲圉：调节状态。以防止锅炉缺水/满锅。并发出声光报警提醒操作员注意调节器目前的工作状态。
(2)自动/手动自动切换功能
当液位信号异常时，DCS自动地从单冲量或二冲量切换到手动状态。调节器输出保持前一周期的输出，并发出声光报警,提醒操作员注意调节器目前的工作状态。
(3)汽包液位补偿
由于饱和水及饱和蒸汽的虛度随着澉汽压力的变化而变化，当用差压变送器测量汽包液位时，在同样的液位而不同的蒸汽压力下.其变送器输出所指示的液位也不同，其原因是饱和水和饱和蒸汽的重度的影响，误差为10%?15%。为克服饱和水及饱和蒸汽的重度的影响，特增设汽包液位补偿功能，以减少测量误差。
4.3顺序控制系统(SCS)
锅炉辅机设备的顺序控制及联锁的基本目的是将正常运行时由下锅炉及辅机设备的工况原因对设备所产生的不良影响降至***低，以保障设备的长久使用。其主要功能是在装置不满足运行条件或正常运行中接近不稳定、不安全的运行状态时，依靠预先设定的保护动作来限制该装賈的瞬间动作方式，***终得以保证设备的安全。本台循环流化床锅炉的DCS控制系统设置多套顺控及联锁控制回路，包括引风机、一次风机、二次风机、高压风机、石灰石风机、给煤机，循环水泵，冷渣器以及水系统的电动门和蒸汽系统的电动门及安全门。
4.4炉膛安全监控系统(FSSS)
采用ABB800xA系统实现的炉瞠安全监控系统的主要功能是在锅炉启动，停止该正常运行等各种方式下，连续监视燃烧系统的各种参数与状态，根据顺序逻辑程序和安全联锁条件控制各种联锁装贾和燃烧系统中的相关设备，完成必要的设备操作或事故处理，防止***性的燃料和空气混合物在锅炉的任何部位积聚，避免锅炉***等未遂事故的发生，保障锅炉的运行安全。
FSSS系统的主要功能包括炉膛吹扫、MFT、风道燃烧器和启动燃烧器启停、给煤机启停等。在锅炉每次冷态启动或当总给料跳闸(床温低于600°C且无任何燃烧器在运行)，必须对炉瞠进行通风吹扫。所有吹扫允许条件都在CRT画面上有自己的状态显示,当所有条件都满足时，“吹扫准备”灯亮，此时运行人员可按“启动吹扫”按钮，开始通风吹扫。
如果在启动吹扫后的规定时间内，上述条件继续保持满足，则到达规定时间后系统将自动发出“吹扫完成”信号，“吹扫完成”灯亮，自动复位软逻辑主燃料跳闸存贮器，或由运行人员案FSSS软操盘上的MFTRESET键，即可复位“手动跳炉”或DCS两路电源均丧失引起的硬逻辑MFT。MFTU号复位后，锅炉进人准备点火阶段。如果在规定时间内任一条件丧失，则发出“吹扫中断”信号，这时必须等恃所有条件重新满足后，再从头进行一次完整的吹扫过程。MFT是FSSS中安全措施的***高形式。当出现任何危及锅炉安全运行的情况时，将发出MFT动作指令，快速切断所有进入炉瞠的燃料和物料，并将MFT信号送至其它系统。其中，***个直接引起MFT的信号就是首出眺闸原因，首出跳闸原因将记忆并在CRT上显示,直到启动前吹扫开始后或者吹扫结束时才清除。
5结语
本项目从合同生效至调试完毕，历时6个月顺利完成。基于IndustrialIT控制平台的800xA系统完全满足对循环硫化床的工艺要求和现代化管理的要求220t/h循环流化床锅炉在印度尼西亚金光集团江碧纸业LPPPI投人使用后，解决了该厂之前的汽电不平衡问题，满足了生产和生活的用电用汽问题，减低工人的劳动强度，节约了能源，效果显著。
P0900CP Auto/Manual Station
P0900DB SCSI Bus Terminator
P0900DN Display Panel (1 Keyboard)
P0900DQ 19-Inch WS Display w/TS (Workstation Mtg)
P0900DR 19-Inch Workstation Display (For Workstation Mtg)
P0900DS 13-Inch WS Display w/TS (Workstation Mtg)
P0900DT 13-Inch Workstation Display (For Workstation Mtg)
P0900DU Streamer Tape Drive (SCSI), For Workstation Mtg
P0900DV 80 Mb Hard Disk Drive (SCSI), For Workstation Mtg
P0900DX Floppy Disk Drive (AP10), For Workstation Mtg
P0900DY Floppy Disk Drive (AP20), For Workstation Mtg
P0900EA Wide Range Pwr Module 1 - Ped Encl 8 Peripherals
P0900ED Floppy Disk Drive (AP10), Pedestal Mounted
P0900EE Floppy Disk Drive (AP20), Pedestal Mounted
P0900EF 80 Mb Hard Disk (SCSI), Pedestal Mounted
P0900EG Hard Disk 20 Mb (Panel)
P0900ES Letterbug Character " 0 " (Tube Of 10)
P0900ET Letterbug Character " 1 " (Tube Of 10)
P0900EU Letterbug Character " 2 " (Tube Of 10)
P0900EV Letterbug Character " 3 " (Tube Of 10)
P0900EW Letterbug Character " 4 " (Tube Of 10)
P0900EX Letterbug Character " 5 " (Tube Of 10)
P0900EY Letterbug Character " 6 " (Tube Of 10)
P0900EZ Letterbug Character " 7 " (Tube Of 10)
P0900FA Letterbug Character " 8 " (Tube Of 10)
P0900FB Letterbug Character " 9 " (Tube Of 10)
P0900FC Letterbug Character " A " (Tube Of 10)
P0900FD Letterbug Character " B " (Tube Of 10)
P0900FE Letterbug Character " C " (Tube Of 10)
P0900FF Letterbug Character " D " (Tube Of 10)
P0900FG Letterbug Character " E " (Tube Of 10)
P0900FH Letterbug Character " F " (Tube Of 10)
P0900FJ Letterbug Character " G " (Tube Of 10)
P0900FK Letterbug Character " H " (Tube Of 10)
P0900FL Letterbug Character " I " (Tube Of 10)
P0900FM Letterbug Character " J " (Tube Of 10)
P0900FN Letterbug Character " K " (Tube Of 10)
P0900FP Letterbug Character " L " (Tube Of 10)
P0900FQ Letterbug Character " M " (Tube Of 10)
P0900FR Letterbug Character " N " (Tube Of 10)
P0900FS Letterbug Character " O " (Tube Of 10)
P0900FT Letterbug Character " P " (Tube Of 10)
P0900FU Letterbug Character " Q " (Tube Of 10)
P0900FV Letterbug Character " R " (Tube Of 10)
P0900FW Letterbug Character " S " (Tube Of 10)
P0900FX Letterbug Character " T " (Tube Of 10)
P0900FY Letterbug Character " U " (Tube Of 10)
P0900FZ Letterbug Character " V " (Tube Of 10)
P0900GA Letterbug Character " W " (Tube Of 10)
P0900GB Letterbug Character " X " (Tube Of 10)
P0900GC Letterbug Character " Y " (Tube Of 10)
P0900GD Letterbug Character " Z " (Tube Of 10)
P0900GE Letterbug Character "." (Tube Of 10)
P0900GF Letterbug Character ":" (Tube Of 10)
P0900GG Letterbug Character "+" (Tube Of 10)
P0900GH Letterbug Character "-" (Tube Of 10)
P0900GJ Letterbug Character "/" (Tube Of 10)
P0900GK Letterbug Character "*" (Tube Of 10)
P0900GL Letterbug Character "#" (Tube Of 10)
P0900GM Letterbug Character "Blank" (Tube Of 10)
P0900HJ Output Bypass Station, 0-20 mA
P0900HK Carrierband Interface
P0900HL Allen-Bradley DH Gateway
P0900HN SPECTRUM Master Gateway
P0900HP Command Center Gateway
P0900HQ 760/761 Gateway
P0900HS FBM22 Auto/Manual Station
P0900HT FBM24 Contact/dc Input
P0900HU FBM26 Contact/dc I/O
P0900HV PC Nodebus Connection
P0900HX FBM22 Term Cable, Direct
P0900HY FBM24A/25A Term Cable, Direct, (V. Mon)
P0900HZ FBM26A/27A Term Cable, Direct, (V. Mon)
P0900JB FBM22 Term Cable, Wire
P0900JC FBM24A/25A Term Cable, Wire, (V. Mon)
P0900JD FBM26A/27A Term Cable, Wire, (V. Mon)
P0900JE LAN 2-Port Passive Tap
P0900JF Carrierband LAN Terminator
P0900JG Carrierband LAN Drop Cable, 50 Feet
P0900JH Carrierband LAN Drop Cable, 100 Feet
P0900JJ Nodebus Extension Module/Term Block Cable
P0900JL FBM22 Term Cable, Plug
P0900JM FBM24A/25A Term Cable, Plug, (V. Mon)
P0900JN FBM26A/27A Term Cable, Plug, (V. Mon)
P0900KA Modular Workstation 10
P0900KB Modular Workstation 20
P0900KC Modular Workstation 30
P0900KD Modular Workstation 40
P0900KE Modular Workstation 50
P0900KF Modular Workstation 60
P0900KG Modular Workstation 70
P0900KH Modular Workstation 80
P0900KJ Modular Workstation 90
P0900KK Modular Workstation 100
P0900KL Modular Workstation 110
P0900KM Modular Workstation 120
P0900KN Modular Workstation 130
P0900LU PWA INTERFACE
P0900MA WS (No Display Panel, Swivel/Cover, End Cap)
P0900MC Left Side
P0900MD Base
P0900ME Front Structure
P0900MF Rear Structure
P0900MG Top Structure
P0900MH Center Structure
P0900ML Right Workstation End Cap
P0900MM Left Workstation End Cap
P0900MN Base End Cap
P0900MP Display Panel (Plain)
P0900MQ Display Panel (13-Inch CRT)
P0900MR Display Panel (2 Keyboa***)
P0900MS Mouse Port Cover
P0900MT Wedge (Front Panel)
P0900MU Trim Work Surface
P0900MV Work Surface
P0900MW Top Structure Swivel
P0900MX Top Structure Plain CoV(No CRT)
P0900NT Carrierband Interface
P0900NV X.25 Gateway
P0900NW Panel Display Processor 10
P0900NX FBM25 Contact/dc Input Expander
P0900NY FBM27 Contact/dc I/O Expander
P0900NZ Panel Mounted Display
P0900PZ AP10 - RS232 Terminator
P0900QA Wide Range Pwr Module 1 - Ped Encl 8 Peripherals
P0900QK Wide Range Pwr Module 2, Ped Encl 8 Peripherals
P0900QL Wide Range Pwr Module 2, Ped Encl 8 Peripherals
P0900RJ Wedge Display Surface (Plain)
P0900RK Wedge Display Surface (Peripherals)
P0900RL Wedge Work Surface
P0900RM Wedge (Rear Cover)
P0900RN ac Junction Box Cover
P0900RU I/A Series ***all System 1
P0900RY CONT PWA T/S
P0900SA Optical Diskette
P0900SV Upper Rear Cover
P0900SW Disk Drive Bezel (1 Slot)
P0900SX Disk Drive Bezel (2 Slot)
P0900TB 13-Inch Hardened Workstation Display
P0900TE 13-Inch Hardened Workstation Display w/TS
P0900TH 19-Inch Hardened Workstation Display
P0900TL 19-Inch Hardened Workstation Display w/TS
P0900TP Video Ext Cable (WP20/Hardened Display), 100 Ft
P0900TQ Video Ext Cable (WP20/Hardened Display), 500 Ft
P0900TR WP I/O Cable (WP20/Hardened Display), 100 Feet
P0900TS WP I/O Cable (WP20/Hardened Display), 500 Feet
P0900UX Seal, Door
P0900VN FBM29 Validated Contact Input/Vdc Output
P0900WA Industrial Pwr Mod 3A, ac Backup Pwr
P0900WF Industrial Pwr Mod 3D, dc Backup Pwr
P0900WL FBM30 Validated Contact Input/Vdc Output Expander
P0900WS I/A Series ***all System 2
P0900WT FBM10/15 Term Cable, Wire
P0900WU FBM11/16 Term Cable, Wire
P0900WV FBM10/15 Term Cable, Direct
P0900WW FBM11/16 Term Cable, Direct
P0900ZA FBM10/15 Term Cable, Plug
P0900ZB FBM11/16 Term Cable, Plug
P0900ZR 15 Foot Parallel Printer Cable
P0900ZS Microsoft Serial Mouse For PW's
P0900ZU Nodebus Interface Cable (10 Ft)
P0900ZV Nodebus Interface Cable (50 Ft)
P0900ZW Nodebus Interface Cable (150 Ft)
P0901AA Panel Display Station - 100 Vac
P0901AB Panel Display Station - 120 Vac
P0901AC Panel Display Station - 220 Vac
P0901AD Panel Display Station - 240 Vac
P0901AK Auto/Manual Station
P0901AX A/M Station Cable w/Plug Termination (50 Ft)
P0901AY A/M Station Cable w/Plug Termination (100 Ft)
P0901BJ A/M Station Cable w/Plug Termination (150 Ft)
P0901BU A/M Station Cable w/Plug Termination (200 Ft)
P0901BX A/M Station Cable w/Plug Termination (500 Ft)
P0901BY A/M Station Cable w/Plug Termination (1000 Ft)
P0901ED Dot-Matrix Printer 80, B/W - 120 Vac
P0901EE Dot-Matrix Printer 80, B/W - 220 Vac
P0901EF Dot-Matrix Printer 80, B/W - 240 Vac
P0901EG Okidata 80-Column Printer For PW's (120 Vac)
P0901EH Okidata 80-Column Printer For PW's (220 Vac)
P0901EJ Okidata 80-Column Printer For PW's (240 Vac)
P0901EK Color Ink-Jet Printer - 100 Vac
P0901EL Color Ink-Jet Printer - 120 Vac
P0901EM Color Ink-Jet Printer - 220 Vac
P0901EN Dot-Matrix Printer 132, Color - 120 Vac
P0901EP Dot-Matrix Printer 132, Color - 220/240 Vac
P0901ET Dot-Matrix Printer 80, Color - 120 Vac
P0901EU Dot-Matrix Printer 80, Color - 220/240 Vac
P0901EX Color Ink-Jet Printer - 100 Vac
P0901EY Color Ink-Jet Printer - 240 Vac
P0901EZ Color Ink-Jet Printer - 240 Vac
P0901FA Panel Display w/Auto Manual Station - 100 Vac
P0901FB Panel Display w/Auto Manual Station - 120 Vac
P0901FC Panel Display w/Auto Manual Station - 220 Vac
P0901FD Panel Display w/Auto Manual Station - 240 Vac
P0901FJ A/M Station Cable w/Wire Termination (50 Ft)
P0901FK A/M Station Cable w/Wire Termination (100 Ft)
P0901FL A/M Station Cable w/Wire Termination (150 Ft)
P0901FM A/M Station Cable w/Wire Termination (200 Ft)
P0901FN A/M Station Cable w/Wire Termination (500 Ft)
P0901FP A/M Station Cable w/Wire Termination (1000 Ft)
P0901GE Black Print Cartridge For Color Ink-Jet Printer
P0901GF Color Print Cartridge For Color Ink-Jet Printer
P0901GG Z-Fold Paper For Color Ink-Jet Printer
P0901GH Transparency Film For Color Ink-Jet Printer
P0901GJ Printer Stand 80
P0901HA Industrial Pwr Mod 9, 24 Vdc (Fan)
P0901PE ABDH Cable (To 1771-KF), 40 Feet
P0901PF Modicon Cable (To J478 Modem)
P0901RR Filler Plate
P0901SD ABDH Cable (To 1770-KF2), 40 Feet
P0901SE Modicon Cable (Direct Connect)
P0901VA External Status Tap Assembly
P0901VJ 80 Mb Hard Disk Drive (w/AP10 SW)
P0901VK 80 Mb Hard Disk Drive (w/AP20 SW)
P0901VL 80 Mb Hard Disk Drive (w/AP10 SW) Pedestal Mtg
P0901VM 80 Mb Hard Disk Drive (w/AP20 SW) Pedestal Mtg
P0901VN 80 Mb Hard Disk Drive (w/AP10 SW) Workstation Mtg
P0901VP 80 Mb Hard Disk Drive (w/AP20 SW) Workstation Mtg
P0901VQ 200 Mb Hard Disk Drive (w/AP10 SW)
P0901VR 200 Mb Hard Disk Drive (w/AP20 SW)
P0901VT Bridge Assembly For IE32
P0901XF Support Channel
P0901XT Fieldbus Termination Assembly
P0901XW Carrierband LAN Coax Termination Assembly
P0901YJ FE 8 Sealed Front Door, Extended
P0901YK FE 8 Sealed Rear Door, Extended
P0901YR WS (No Display Panel, Swivel/Cover, End Cap)
P0901YS 19-Inch CRT Without TS
P0901YT 19-Inch CRT With TS
P0901YV Support Channel
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