BENTLY NEVADA   3500/92本特利BENTLY NEVADA   3500/92本特利BENTLY NEVADA   3500/92本特利

工控zui重要的*是稳定,第二是稳定,第三还是稳定,而稳定不单是硬件方面,软件其实也非常重要,再有就是抗于扰。这里只谈PLC软件。 我把PLC程序规范为以下几个组成部分： 
一、系统初始化， 
二、过程或状态的描述(相当于继电、接触控制中的中间继电器)， 
三、人机操作控制(手动操作，参数修改等)， 
四、设备控制输出(电机、阀等)， 
五、通信(各控制设备间的互锁和数据交换)、 
六、过程或状态的故障描述， 
七、报警输出和故障位置等信息显示， 
八、生产过程报表(产、质量等)。 
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郑娟萍

厦门仲鑫航自动化设备有限公司

下面主要谈谈过程或状态的描述和设备控制输出，因为这基本上是程序的主要部分。
程序好坏的标准：稳定、易调试、易修改、易扩展、易读、实时性(快)。在这么多年的实践中，我感到先由过程或状态的描述得到各种状态变量，再对设备输出进行编程能比较好的达到上述目标，可能它在快的方面有所欠缺(因为程序长一些)但这*可以从其它方面得到解决(例如中断)。这种想法主要源自数学上的状态方程：Q=f(S1，S2，S3……..,Sn)其中Q为设备输出,S1、S2、S3…….Sn为状态变量(包括输入输出)。f是由指令系统组成的算法。

HUMPHREY VALVE 41R-S3

SPORLAN THERMOSTATIC EXPANSION VALVE SVE 5 103339

JAMESBURY LCF8M 20" BUTTERFLY VALVE 848-0027-38

WARREN STAINLESS STEEL 1" GATE VALVE  852-T 99425

NUMATROL 1/8" NPT 3-WAY PUSHBUTTON VALVE PE3-0001

WATSON MCDANIEL 1/2" NPT, 80 PSIG INVERTED STEAM TRAP SERIES 1031

SPRAYING SYSTEMS CO. AIR ATOM  1/4 JSS 105456

ITT BELL & GOSSETT 125PSI 5/8"NPT REDUCING VALVE 110190 / B-38

RICHDEL 120VAC DIAPHRAGM VALVE, I205PVN120ACNC

METSO AUTOMATION 800kPaV115PSIG ELECTRO-PNEUMATIC POSITIONER NIB NE724S/S1

WORCESTER 2

WATTS 1-1/2-2" FIRST CHECK REPAIR KIT, RK 007M1 CK1 11/2-2 *NEW*

YUKEN SOLENOID VALVE DSG-01-3C4-D24-60

FISHER CONTROLS SIZE 40 TYPE 667 ACTUATOR W/ 2" VALVE 103880

TIMKEN TAPERED WHEEL BEARING 15123 200506 44 *NEW*

ROSS CONTROLS PILOT OPERATED CHECK VALVE SERVICE KIT, 1438K77 *NEW*

DOUBLE A HYDRAULIC SOLENOID VALVE, SQ-005-1M-21A2

LEGEND VALVE * BACK FLOW PREVENTER  * T-459

120/60 110/50 SOLENOID VALVE MP-C-080

2" BALL VALVE 316 1000WOG

MAC SOLENOID VALVE 45A-AA1-DDAA-1CM

ASCO RED HAT SOLENOID VALVE 8262B208

SUN HYDRAULICS CHECK VALVE FXCA LAN 1.20-GPM

TRU-BLUE SOLENOID VALVE EASYMT4V12W20 104513

DWYER RATE-MASTER RMB FLOWMETER NIB S45E / RMB-83

FESTO VALVE LR/LFR D-MINI-A NIB

PARKER SOLENOID VALVE B5V2ADA49C

BANJO 1" NPT 4-BOLT DESIGN BALL VALVE FP BLTD VALVE Y

PLASTIC SYSTEMS 150 PSI 1-1/2" PVC COMPACT BALL VALVE, +GF+ *NEW*

PARKER COMPLETE VALVE 04F25C2122CA=GC05

FISHER CONTROLS SIZE 46 TYPE 667 ACTUATOR W/ 1.5" VALVE 105067

TAYLOR 10-160"/WATER PRESSURE GAUGE

NUMATICS FLOW CONTROL VALVE NIB 3FPRN12

SMC  0.7MPa 15MM SOLENOID VALVE VXZ2240

METSO 20-115PSI PNEUMATIC POSITIONER REV.2.1 ND9106HN

FOXBORO 9300A SERIES MAGNETIC FLOWTUBE 9303A-SIBA-TPJ-GM 103711

NORGREN SOLENOID VALVE VS26S611DF213A

JAMESBURY 316SS 275PSI 8" BALL VALVE 9150313600XTZ2

CLIPPARD MINIMATIC J SERIES 3 WAY CARTRIDGE VALVE MJV-3C SEALED

NUMATROL PNEUMATIC TIMER VALVE, TM0-2101

ASCO 150PSI SOLENOID VALVE U 8380B002

SMC 0.7MPA 15MM ORIFICE 1/2" NPT PNEUMATIC SOLENOID VALVE, VXZ2240

METSO 20-115PSI PNEUMATIC POSITIONER REV-2.0 ND9106HN

VICKERS 5000PSI DIRECTIONAL CONTROL VALVE DG4V-3S-7A-M-FW-B5-60 *NEW*

PARKER 1/4" NEEDLE VALVE 4Z(A)-V4LR-SS 104448

BELL & GOSSETT ITT ASME PRESSURE RELIEF VALVE 790-50

MUELLER * STREAMLINE GLOBE VALVE NIB * A 15251

CIRCLE SEAL 3000 PSI CHECK VALVE  233B-3PP

MAC 110/120V 6.8W 150 PSI SOLENOID VALVE, 55B-12-PI-116AA *NEW*

STEEL BUTTERFLY VALVE, 4" 105251

SMC 1/4"NPT 4 PORTS 0.5-7BAR AIR RELIEVING REGULATOR NO GAUGE EAR111 

HONEYWELL SKINNER 110/120V 10 WATT VALVE X5L2750CT 104281

LEGRIS LEGRIS 2 FLOW REGULATOR VALVES 1/4FT NIB 7770-56-00 2A

SMC SOLENOID VALVE NVFS3100-5FZ

NEPTUNE * WATER METER VALVE * NSF 61

STOCKHAM 7000CWP 300SWP BRASS GLOBE VALVE FIG.B-74

MAC 24VDC 12.7W 120 PSI PNEUMATIC MANIFOLD VALVE, 35A-B00-DDFA-1BA *NEW*

MAC 3/8 NPT, SOLENOID MANIFOLD BASE 92B-000-CJ3

DAMAN PRODUCTS AD05COP, SEALED

WAUKESHA CHERRY-BURRELL 3IN STAINLESS STEEL BUTTERFLY VALVE

ALKON 3/4"NPT IN-LINE NEEDLE VALVE JN6N *NEW*

MILWAUKEE VALVE 200 PSI, 3" SIZE BUTTERFLY VALVE CL323E

EATON VICKERS VALVE DG4S4-016C-U-B-60 103676

NUMATICS 1/8" FLOW REGULATOR 1FC1 NIB, LOT OF 3

PARKER 110/120V 50/60HZ 6.3W SOLENOID VALVE COIL NIB

WHITEY 316 AABQ 5000PSI NEEDLE VALVE SS-1RS6 105284

MATCO-NORCA 200 WOG 3/4" NPT GATE VALVE, 514T04 *NEW*

ARMSTRONG STEAM TRAPS NIB G1986 / 1-AV

PARKER 1/2"NPT HYDRAULIC VALVE RP800S *NEW*

HOSCO STAINLESS STEEL VALVE SSBV-6TF-316

ITT BELL & GOSSETT 30PSI 3/4"NPT RELIEF VALVE 110121 / 790-30

ASCO SOLENOID VALVE EF8210G88

NELES CONTROLS 4-20mA 36-115PSIG PNEUMATIC VALVE POSITIONER ND826/S1

SMC AIR REGULATOR SET PRESS 7~100PSI NAR111

JOHNSON CONTROLS NC/PB CAPILLARY ASSEMBLY J1023 / SEH37A-602

NELES 36-115PSIG 250-800kPa PNEUMATIC POSITIONER REV-5.02 ND8261/31

DURAMETALLIC COMPLETE SEAL RA-C D  103671

BINKS 1/8" NPT FLUSHING VALVE, 72-1277 *NEW*

NIBCO 3/4"NPT GATE VALVE S-113, MSS SP-80

NUMATROL PNEUMATIC LIMIT VALVE LR3-0206

WILKERSON 1/4"NPT, MINIATURE REGULATOR R00-02-000

NIBCO / CHEMTROL 3/4" FULL PORT BALL VALVE S51SU V *NEW, SEALED*

NUMATICS 24VDC SOLENOID VALVE  P01794000BU0061

BINKS 1/8" NPT FLUSHING VALVE, 72-1277 *NEW SEALED*

ROCON WATER CONTROL VALVE WCV-S-4-H-7-E3A5F1-D1-LR-E5C2

120/6 110/50 FB COIL N-1044

VICKERS PILOT VALVE DIAGRAM DG-01 *NEW*

ECKSTROM 8" GATE VALVE 170086

NIBCO 2000 WOG CF8M 3/8" NPT STAINLESS STEEL BALL VALVE, T580S6R66LL *NEW*

ATOS SP-COI Valve Coil Class 115/60/10 CLASS H

CONTROL DEVICES * VALVE * 32170771 C

CRANE 3682-X 2" CHECK VALVE DA 23853 104065

PRINZING 1"TO 2-1/2"  LOCKOUT SD02 *NEW*

DELTROL VALVE 10000-00 IN, F10B *NEW*

HANSEN TECHNOLOGIES 3/8" ANGLE VALVE THREADED HAND WHEEL AT038H *NEW*

TRIAD STAINLESS STEEL 3-PIECE BALL VALVE, 1", NNB

JAMESBURY ST-400B ACTUATOR W/ 4" BALL VALVE CLASS 150

SMC VOZ335-5L  SOLENOID VALVE

ASCO 120V, 60Hz, 6W, 1/4, 3/32, 100PSI SOLENOID VALVE WP8324 27

PARKER, 2000 PSI, 15 GPM, HYDRAULIC CHECK VALVE, C800B

PARKER 1/8"NPT 2000PSI FLOW CONTROL VAVLE PF200B *NEW*

PHD VALVE  19076-2-5501

HOFFMAN 250 PSIG 450°F 1" NPT BUCKET STEAM TRAP, B3250A *NEW*

AUTOMATIC SPRINKLER CORP. MODEL I VALVE NO. 85-100 105315

WATTS 1"NPT 600WOG BRONZE BALL VALVE 0513 *NEW*

BOSCH REXROTH 01-0-821-200-204-682 FLOW CONTROL VALVES, LOT OF 2, NEW IN BAG

NIBCO BRASS 1-1/2" Y SPLITTER

VICKERS VALVE MANIFOLD TAPPING PLATE DGMA-3-T1-20-S

METSO AUTOMATION 250-800kPa PNEUMATIC VALVE POSITIONER REV-5.02 ND8221/S1

BURKERT 2/2-WAY ANGLE-SEAT VALVE 001146Z

LEGRIS 3/8IN FLOW CONTROL VALVE

PARKER 5000 PSI 345 BAR 30 LPM 8 GPM HYDRAULIC NEEDLE VALVE, N820S4 *NEW*

SMC 1/4" PNEUMATIC FLOW CONTROL VALVE, AS2200 *NEW*

SHUT OFF VALVE 403465

FLYGT LEVEL REGULATING FLOW SWITCH NIB ENM-10

MAC 110/120V 6.8W 150 PSI SOLENOID VALVE COIL, PID-111CAAA *NEW NO BOX*

VERSA 200VAC 2.8-12BAR 40-175PSIG SOLENOID VALVE VSG-3511-HC-M-U-10-14-55M-A120

SMC FLOW CONTROL AS3201F-02-10 NIB

DYNAQUIP CONTROLS 140PSI 1/2"NPT PNEUMATIC ACTUATOR W/ BALL VALVE, 189003A *NEW*

CROSS 4Z0002 3/4IN NPT 1/2IN NPT THREADED MANIFOLD HYDRAULIC VALVE

FESTO * CONTROL VALVE NIB * HB-1/8-QS-6

ROBOHAND FAILSAFE VALVE OFSV-002 NIB SEALED

NYCOIL * LEVER VALVE  * 1/4 600CWP

UPPER POPPET VALVE ASSEMBLY 300-853 300853

WATTS REGULATOR 600 WOG 28.5MM INLINE SHUT OFF VALVE 9552

FLOW-TEK 1-1-2" BALL VALVE  105353

BELL & GOSSETT 125 PSI 225???’?￠a??????a€????°F 3/4" NPT REDUCING VALVE,  B7-12

SENTRY EQUIPMENT CORP.  12VDC SOLENOID VALVE  414/567-7256 105346

SMC PRESSURE REGULATOR NIB IR3020-N02G

WATTS BACK FLOW PREVENTER 1/2" 008 PCA

FOXBORO 4" MAGNETIC FLOW TRANSMITTER 2804-KARA-OS 103971

ROCON WCV-B-4-H-7-E3C5F2-D1-L-E5C2 120VAC/24VDC WATER CONTROL VALVE

ARMSTRONG * MACHINE 2&14" BALL FLOAT TRAP  * 216

WATTS 1" REGULATOR VALVE

MERIT * SCH 40 PIPE NIPPLE * 1W-72796

VICKERS PRESSURE REDUCING VALVE DGMX1-3-PP-BK-B-40

WILKERSON SAFETY LOCKOUT V28-04-0000

PARKER LOCKOUT VALVE PS856P 99736

ATKOMATIC  * SOLENOID VALVES * -

HAMLET * VALVE * H-700-SS-L-1/2-T-LD

O & R  3500PSI PNEUMATIC VALVE

NELES-JAMESBURY LOCKING DEVICES FOR ELIMINATOR IMO-263 *NEW*

VICKERS 1000PSI REDUCING VALVE XCT-08-1B-30

FISHER CONTROLS SIZE 46 TYPE 667 ACTUATOR 1.5" VALVE W/ FIELDVUE 104986

FISHER CONTROLS SIZE 46 TYPE 667 ACTUATOR 1.5" VALVE W/ FIELDVUE 104986

REXROTH VALVE M54380002

HIRSCHMANN SOLENOID VALVE B12 GDM WITH BASE NNB

SUN HYDRAULICS, RELIEF VALVE 01742

PARKER 24VDC SOLENOID SERVICE KIT NIB PS3541B49P

NUMATICS 3/4" NPT VALVE BODY 5FC3

NIBCO * 250PSI BUTTERFLY VALVE * LD3022

BARKSDALE 3/8" VALVE 9022-M-A-C-E 104465

NUMATICS 3FC2

NEOPRENE VALVE DIAPHRAGM GASKET 210-4030 105643

811 STEAM TRAP VALVE, 1-1/4" 105457

AUTOMATIC VALVE USA SOLENOID VALVEL 0702AAWR

SMC AS2201F-N01-07S FLOW CONTROL VALVE NIB

ASCO RED HAT II 120/130PSI 1/4 PIPE 10.0W CODE L1 SOLENOID VALVE 8320G172  NIB

MIKROPUL MIKRO-AIRLOCK ROTARY VALVE 60217M-25 102201

PARKER * HYDRAULIC VALVE * PC M620S

BELIMO  ACTUATOR  3-WAY VALVE ASSEMBLY B309+TR24-SR/300 US

SKINNER-SEAL 4-INCH STD STEEL PIPE CLAMP  105562

PARKER 3/8" NPT SUBBASE PS330000P *NEW*

TOKIMEC DIRECTIONAL CONTROL VALVE DG4V-3-6C-M-P7-H-7-52

CYRUS SHANK 175 PSIG SAFETY RELIEF VALVE 804 TE *NEW*

ALLAR COMPANY VALVE ASSEMBLY 46950 NIB

LUBRIQUIP DIVIDER OF VALVE MJ5S *NEW, LOT OF 5*

WATTS REGULATOR VALVE, 1/4" 104479

NEWCO 4IN ASME B16.34 / ANSI 150 CAST STEEL GLOBE VALVE 21F-CB2

R-P&C GATE VALVE, 3/4" 105159

MASONEILAN DRESSER 88-41425 6" VALVE ACTUATOR W/ POSITIONER FVP110, NEW 99286

ASCO RED-HAT 110/120V 10.5W 125 PSI 3/4" NPT SOLENOID VALVE, 8215A33 *NEW*

PARKER CHECK VALVE NIB C1220S-V

CONBRACO 1/2"NPT WATER GAUGE VALVE SET 20-150 *NEW*

PARKER 5000 PSI 3 GPM 1/8" NPTF FLOW CONTROL VALVE, F200S *NEW*

NORGREN * PRESSURE RELIEF VALVE NIB * 16-004-011

SIMPLIPORT GLASS MODULE, PW-24BR NIB

ASCO * SOLENOID VALVE * U 8380 A2

WATTS REGULATOR VALVE 3/4 2000 WOG

SS AIR VALVE 10015098  105632

JOMAR 200WOG 2-1/2"I.D. GATE VALVE

3/4 BRASS/BRONZE SWING CHECK VALVE 200 WOG

VOSS 3/4"NPT HYDRAULIC BALL VALVE PN-800

LUBRIQUIP 1/4V 1/2V DIVIDER VALVE B95

NUMATICS * VALVE * NO PART NO.

APOLLO CONBRACO 1" BALL VALVE  70-105-01

CKD SOLENOID VALVE 25V 1/4" THREAD AB2X0018

SMC, 1-1/4" NPT, 1 MPA MAX, 5-60oC, 30DB, SILENCER NAN700-N12 *NEW*

WATTS 3/4" x 1" KIT #52 COMPLETE VALVE RUBBER PARTS KIT, 0881321 *NEW*

APOLLO BALL VALVE 72-100-01 / A108 99852

MAC 110/120V 6.8W 25-150 PSI SOLENOID VALVE COIL, PMC-111DA-BE

ABZ 6" 200PSI CAST IRON BUTTERFLY VALVE W/ ACTUATOR SR 200 DA

UL GENERAL PURPOSE VALVE 626A

ASCO RED-HAT 110/120V 15.4W 2" NPT SOLENOID VALVE, 8215B81, NNB

NIBCO * BRASS BALL VALVE * 125 SWP 3/4 IN.

CONBRACO 3/4"NPT VACUUM BREAKER 38-104 *NEW*

NUMATROL 5-WAY LIMIT VALVE, LR5-0206 *NEW*

GRUVLOCK 4X2" PIPE CLAMP  105184

SWAGELOK 100PSIG @ 450°F STAINLESS STEEL 2-WAY BALL VALVE SS-62ST/BAGJ-07 *NEW*

PARKER 24VDC, 1.00A, 5000/1500PSI, 5-PIN MALE SOLENOID VALVE D1VHW4CNJCF56

VNE 3IN 1000WOG 3-WAY BALL VALVE 316

SWAGELOK 3/8" VALVE SS-8P6T 104462

GENERANT 1/4" FxF NEEDLE VALVE SSV-C-4 NIB

VALVE VAP 100

SWAGELOK QUICK-CONNECT STEM VALVE B-QC6-D-600 *NEW*

NLB CORP. PNEUMATIC VALVES PM12687 *NEW*

HONEYWELL FLUID POWER GAS VALVE NIB V4055A 1031 103193

NUMATICS PNEUMATIC REGULATOR REPAIR KIT 229-642 NIB

HYTORK 425 2" VALVE ACTUATOR W/ WESTLOCK POSITIONER 103920

SIEMENS * VALVE * 40-200

ASCO 120/60 110/50 HT SOLENOID VALVE MP-C-082 / 238810-032-D 105242

YARWAY KEYSTONE UNIBODY PISTON TRAP CLASS 60 731/741 EL 105286

MAV VALVE 133B-501AAAA 101260

WATTS REGULATOR 1" BRASS SHUT OFF VALVE

NUMATICS 3/8" NPT, SHUT-OFF VALVE VS22-03

BRAY 6" SIZE, 175 PSI LUG STYLE BUTTERFLY VALVE 31-124

PARKER 1/4"NPT, 250PSI, REGULATOR 06R116AC

SCHRADER BELLOWS / PARKER 3/8" NPT BRONZE B-FLOW CONTROL VALVE 32500319

VOGT FLOWSERVE 3705 PSI 100°F 3/4" NPT GLOBE VALVE, B146.34 SER. SW15821

BELLOFRAM 0-100PSI 0-7BAR PRESSURE REGULATOR TYPE-51 104104

CRANE 1 1/2" VALVE

AIR FIXTURES INC. 3/8" NPT 4-WAY SOLENOID AIR VALVE, AF-1108-NS *NEW*

VOGT * GATE VALVE * A105 PR98

PARKER 250PSI SAFETY RELIEF VALVE H4 *NEW*

JAMESBURY PNEUMATIC VALVE ACTUATOR VPVL450 DA B C

SMC 0.15-0.9MPa, 5-PORT, 26V, SOLENOID VALVE NVF5420-5DZ-03T *NEW*

RESUN 1 1/2" NPT, 200 PSI WOG LUBRICATED PLUG VALVE R1430

SPORLAN THERMOSTATIC EXPANSION VALVE DRPL 3 AR 50-65 103340

ASCO MP-C-080 SOLENOID VALVE 238610-132D 103684

MAXON 1.5-M MICRO-RATIO VALVE

NORDSON AIR VALVE KIT 236038B, AA99F *NEW*

FLOWSERVE 1/2" SIZE, 1975 PSI FLANGE GATE VALVE SW 12111 *NEW*

BRADLEY * BRASS STRAINER STOP CHECK VALVE LOT OF 3  * 118-039A

BRONKHORST 10IN/MIN. AIR FLOW VALVE,  F-001AC-LIA-33-V

3/4" JENKINS GATE VALVE 300 CWP

CIRCLE SEAL? 3/8" MALE NPT 1-1/2" OAL CHECK VALVE 2220T1-3MM-1 *NEW*

MILLER 24VDC 1/8" ORIFICE 2-WAY CUSTOM VALVE KIT, 218494 *NEW*

VELAN CLASS 800 1 1/2 STEEL VALVE A105N 103991

ASCO RED HAT 100PSI 1/4"SOLENOID VALVE NNB 8262B208 101728

STOCKHAM BRASS 3/4" GATE VALVE 1000-OWG 300S 104901