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。

SEXUAR CLOSET VALVE REPAIR KIT A-156-A *LOT OF 2 NEW*

PARKER 1/8"NPT RIGHT ANGLE FLOW CONTROL 032510125 *NEW*

PARKER HYDRAULIC VALVE 493-8D1-2

PFEIFFER VACUUM AUTOMATIC VENTING VALVE TSF 012 *NEW*

NUMATICS 120oF, 300PSIG, 1/2"NPT REGULATOR R30R-04

3/4" MALE/FEMALE SHUT OFF 400

WATSON MCDANIEL 1" NPT INVERTED STEAM TRAP SERIES 1031

REXROTH HYDRAULICS MANIFOLD BLOCK VALVE 00481624

LUBRIQUIP DIVIDER VALVE MSP-40S F01

JORDAN VALVE 10-30 RANGE 1/2" NPT SLIDING GATE VALVE, 69H

HAYWARD 1" TRUE UNION BALL VALVE NSF/ANSI61 *  NSF/ANSI61

PARKER 2000PSI 8 GPM 30 LPM 3/8"-18 NPT HYDRAULIC BRASS CHECK VALVE, C600B *NEW*

SOLENOID VALVE 239-2193 100666

SPEARS 3/4" IPS CPVC BALL VALVE NSF-PW

FESTO 1-8 BAR 5/2 WAY DOUBLE PILOT VALVE, J-5-PK-3

BELL & GOSSETT 1/8" FEMALE NPT AUTOMATIC AIR VENT, NO.7

PARKER AIR PILOT VALVE  B502000XXC

BRAY BUTTERFLY VALVE TOOL

EL-O-MATIC 2" VALVE ACTUATOR ES0200.U1A04A.22K0 W/ PMV POSITIONER EP5

TRABON LUBRIQUIP FLOW CONTROL MODULAR DIVIDER VALVE, 527-005-770

FESTO 230 PSI 1/4" NPT ON/OFF VALVE, HEL-D-MINI, NNB

MILWAUKEE 2000 WOG 3/4" NPT BALL VALVE,  20CSOR-02 *NEW*

ASCO RED-HAT 17.1W 100PSI SOLENOID VALVE EF8003G2 / 238614-132D 102144

JORDAN 6" VALVE ACTUATOR W/ FOXBORO ECKHART POSITIONER P6981-510D-A

VALVCON 115V, 3A, 2"CPVC, VALVE ACTUATOR WITH BALL VALVE LCR 100 KS 115A

NUMATICS 14.5-145PSIG, 3/8" NPT, 24VDC, 0.15A, SOLENOID VALVE L23BA452B *NEW*

KEYSTONE 10" THIN-DISC RESILIENT SEAT BUTTERFLY VALVE 992, NNB

3" BUTTERFLY VALVE

TOYO-OKI HYDRAULIC VALVE HK-03101

ASCO RED HAT VALVE COIL 099-257-1-0 NIB

LUBRIQUIP FLOW CONTROL MODULAR DIVIDER VALVE G05 NNB

GEORGE FISHER +GF+ 161.560.006 PVC SOCKET & THREAD BALL VALVE, 1? EPDM, NNB

HAM-LET 316 STAINLESS STEEL 1/4"NPT VALVE FITTING SW6 *NEW NO BOX*

SPIRAX / SARCO 1/2" STEAM TRAP VS-204 103363

ASCO SOLENOID VALVE REPAIR KIT, 158-927 *NEW*

MILWAUKEE VALVE 150 SWP 300 WOG 1/2" ENDS GLOBE VALVE, 1590 *NEW*

I.S.I NORGREN 30-150 PSI 3/8" NPT PNEUMATIC SOLENOID VALVE, 375-02-007-32 *NEW*

PARKER MODUFLOW 1-1/4" MIL2 2MM PP 200MAOP IN-LINE FILTER 35Y9Y9 1 84 104996

FOXBORO 9300A SERIES MAGNETIC FLOWTUBE 9308A-SIBA-TSJ-6N 102592

PARKER PARTROL FLOW VALVE PF600B 41EU

DYNAQUIP 600 CWP 3/4" NPT TWO-PIECE BRASS BALL VALVE, VMH2-A9 *NEW*

HAMMOND VALVE CORP 8400 HANDLE

HONEYWELL FLUID POWER GAS VALVE V4055A 1296 3

MHV&F CO. 4" 125S 200WOG VALVE 404048 104229

MILVACO 4" 200WOG IBBM GATE VALVE 2882M

AEROQUIP 1/2"MNPT CONEXION T-TUBE 2030-8-10S *NEW LOT OF 3*

VERSA 120V 60HZ 75PSI 12W ELECTRIC QUICK EXHAUST VALVE EMS 801266ZCLB6 *NEW*

PARKER 24VDC 6W 300 PSI 1/16" ORIFICE SOLENOID VALVE, 3121BBN1GV00RRT1J1C2 *NEW*

FESTO SOLENOID VALVE MEH-5/2-1/8-B

WILKERSON REGULATOR VALVE MSD-C3-KA1E

FESTO 24V 1A PNEUMATIC VALVE COIL, MPZ-1-24, NNB

NUMATICS 150PSIG-AIR, 110-120V, 0.12A SOLENOID VALVE W/ MANIFOLD 152SA425K000030

SMC SOLENOID VALVE  VZ2150

2" BALL VALVE CF8M 1000 W0G

FLOTECT 125/250VAC 5A FLOW SWITCH, V6EPBBS2BGM2

WILDEN PRESSURE RELIEF SEAL KIT 99-9345-99 *NEW*

ASCO RED-HAT 120V 60HZ SOLENOID VALVE 8345E11

SMC SOLENOID VALVE NNB

SMC SOLENOID VALVE

SUN VALVE CARTRIDGE SCGA-LAN

NUMATROL PNEUMATIC VALVE, PB5-0001 *NEW*

ROSS 1-10BAR 1"NPT 110-120V SOLENOID VALVE 2773A6082 *NEW*

1" BALL VALVE PN40

RED-WHITE 1/2" NPT 600 WOG 150 WSP BRASS BALL VALVE, FIG. 5044F

NUMATICS 150 PSIG-AIR PNEUMATIC SOLENOID VALVE W/ BASE, I24BB415M *NEW*

ASCO 3/4 INCH, 5-125PSI, 24VDC, SOLENOID VALVE EF8210G3V *NEW*

SMC * BLANKING PLATE  * VVQ2000-10A-1

JOHNSON CONTROLS PENN SIZE 1" WATER VALVE V46AD-1 103326

REXROTH 24VDC 1.1W PLUG-IN VALVE, 576-190-022-0 *NEW*

WILKERSON 3/4IN. NPT 300PSI-INLET 175F DUAL AIR REGULATOR R31-06-L00B *NEW*

1/4" REGULATOR VALVE LOT OF 4

NUMATICS * SOLENOID VALVE NIB *  237-568B

GEMINI VALVE REPAIR KIT NIB VRK89-0.5

UNKNOWN MFG * NPSF DIVIDER VALVE BLOCK  * J09B

MAC VALVE  52A-14-BOA-DM-DDF-J-1JM NIB

ASCO RED HAT 100PSI SOLENOID VALVE NIB 8262B208 101726

SIKA  VALVE  VTI 15 K5-40 V

MAXON STO VENT VALVE 3/4" STO-A

MAXON "STO" VENT VALVE 1" STO-A 0

JAMESBURY 116PSI 8BAR VALVE ACTUATOR

VICKERS RELIEF VALVE CS 03 C 50

ASCO 110/120V 10 WATT SOLENOID VALVE 8314C41  104286

STRATAFLO * CHECK VALVE WITH METAL POPPET NIB * 3/4"

BRASS 1/2" BALL VALVE B1644 99943

MERIT * SCH 40 PIPE NIPPLE  * 2-N219075

NUMATROL RELAY VALVE, RA3-2101 *NEW*

NUMATICS PNEUMATIC SOLENOID VALVE 24VDC .15A NIB 226-749B

GENERAL ELECTRIC 600V ELECTRIC SOLENOID CR9500, C107E2A

SMC 1/4" NPT 15-150 PSI SHUT OFF VALVE, NVHS2000

SLOAN FOR ROYAL & REGAL, URINAL RELIEF VALVE A-19-AU *LOT OF 5, NEW*

SMC VALVE NVFS2100-5FZ SEALED

HONEYWELL FLUID POWER GAS VALVE V4055D 1035

AUTOMATIC VALVE AUTOMATIC VALVE  1-1/2" THREADS N1609HALM

ROSS CONTROLS BLANK STATION KIT, 546H77 *NEW*

MORRISON BROTHERS 3/4"NPT SINGLE POPPET FOOT VALVE 334---0100AV *NEW*

FESTO VALVE BARBED-FITTING SUBBASE FLP-7-PK-3

SLOAN * REGAL VALVE 1 X 1-1/4"  * -

VICKERS 25-1000PSI REDUCING VALVE XGL-03-B-10

SS 3/8" FLARED TUBE ADAPTER HC-257, LOT OF 3

TAYLOR * 2IN. 70PSIG 1/2IN. SAFETY RELIEF VALVE * 62G4551711

CAMERON 4IN. BUTTERFLY VALVE

PEPPERL + FUCHS * TYPE Y OR Z PURGE CONTROL VALVE * 3003-WPSA

EATON VICKERS 3000 PSI 3/4" SAE PRESSURE RELIEF VALVE, CS-06-F-50

SMC 24V 0.9MPA 4.5MM ORIFICE 1/4"NPT  2WAY SOLENOID VAVLE VX2330-02-5DZ1-B *NEW*

SMC 24VDC 1/8" NPT W/ SUB-PLATE 5-PORT SOLENOID VALVE, SYJ514M-5GZ-01

FESTO 24VDC 1,6W 145 PSI SOLENOID VALVE, VSVA-B-P53C-ZD-D1-1T1L *NEW*

ASCO 125/100PSI, 1/4"NPT, 110/120V, 50/60HZ, 11W SOLENOID VALVE 8314C29 *NEW*

ASCO RED-HAT II 1/8" 50PSI SOLENOID VALVE 8320G83 103096

SMC SINGLE UNIT SOLENOID VALVE VQ1160-5LB-C6

ITT BELL & GOSSETT 125PSI 7/8"NPT REDUCING VALVE 110196 / B7-12

TOMAL 0.5 MPA 3/8" NPT FLOW WAY CHECK VALVE, T0M-03

SMC PNEUMATIC SOLENID VALVE VV71-FPG

HERION 0-230 PSI 3/8" NPT 3-PORT PNEUMATIC PRESSURE VALVE, 40221-70 *NEW*

NACHI MODULAR VALVE OG-G01-PC-21 *NEW*

NUMATICS 24VDC, 4.0W, SOLENOID COIL 236-233B

WATTS 3/4" RELIEF VALVE 100XL

MAC STRAIGHT CAM ROLLER, 180112 *NEW*

SPIRAX / SARCO 1/2" STEAM VALVE STRAINER VALVE 2IT 105321

GRACO 1/4 INCH DIVIDER VALVE MD-4 *NEW,SEALED*

MSC VALVE KIT M-051-KR064-63, NIB

NORGREN EXCELON 250PSIG 17BAR LUBRICATOR/REGULATOR L74M-4AP-DRP 104107

RP&C 3/4" A105N GATE VALVE MODEL EF56D 103696

UNKNOWN MFG * BALL VALVE  * 1"

MAC AIR HYDRO POWER VALVE 111B-591BA

DELTROL FLUID BRASS PNEUMATIC VALVE  FP 20 B 99932

UNKNOWN MFG * BRASS FLOW INDICATOR SIGHT W/GLASS WINDOWS * 1"

DYNAMCO SOLENOID VALVE  D113202

MOORE PRODUCTS VALVE POSITIONER, 72P315

PARKER DG  5000 PSI DIRECTIONAL CONTROL VALVE OPOM2DD

CASHCO INC. 3/4"NPT 250PSI PRESSURE REGULATING VALVE  2B5-7S27-12000000B

NULLMATIC 1/4" NPT PRESSURE REGULATOR, 40-30

NUMATICS REGULATOR VALE 081RS100J000000

SMC SUCTION FILTER EZFA200-F02 BP

FESTO MMH 5 1/4 WITH FESTO MSV-3

NUMATICS * PNEUMATIC IN-LINE VALVE * 3/5

SMC VTA315-02 AIR OPERATED VALVE NIB

WILKERSON * VALVE ASSEMBLY KIT NIB * RRP-96-294

METSO SAMPLER VALVE NOVE T22P0 / 110Z25A0025XN

ROSS 10 BAR, 110V SINGLE SOLENOID PILOT VALVE 8076B6331

MANNESMANN REXROTH DIRECTIONAL VALVE, 3WE6A61/EW110N

KITZ * VALVE W/ HANDLE * 3/4"

NUMATICS 300 PSI 1/4" NPT SHUT-OFF VALVE, VK21-02

STAINLESS STEEL 3/4" SHUT-OFF GATE VALVE

MDC MFG INC. 1-1/2" MANUAL BUTTERFLY VALVE

MANNESMANN REXROTH DIRECTIONAL VALVE, 3WE6A61/EW110N

KITZ * VALVE W/ HANDLE * 3/4"

NUMATICS 300 PSI 1/4" NPT SHUT-OFF VALVE, VK21-02

STAINLESS STEEL 3/4" SHUT-OFF GATE VALVE

MDC MFG INC. 1-1/2" MANUAL BUTTERFLY VALVE

VERSA 100PSI 10W SOLENOID VALVE ESM-8202-44-H2-CLL36

POWHATAN * VALVE * 1-1/2" 978A

ASCO 50-125PSI 1/4 BRASS VALVE P262C90

SUN HYDRAULICS 1000-6000 PSI DIRECT ACTING RELIEF VALVE, RDDA-LCN *NEW*

CASH ACME 125 PSI 3/4" NPT PRESSURE RELIEF VALVE, TYPE FW *NEW*

FESTO 24VDC, 4.5W, 42VAC, 9/7VA, SOLENOID COIL MSFG-24/42-50/60-OD *NEW SEALED*

LEGEND 2"NPT 150WSP 600WOG 2 WAY SHUT-OFF BALL VALVE T-1001

BOSTON GEAR REGULATOR 1/4" AND 1/8" PORT 100/300PSIG EN42120

SUN HYDRAULICS 3000 PSI SAE-8 SAE-6 HYDRAULIC VALVE, BCJ

MKS ISOLATION VALVE 173-0050K-24VDC  NEW OTHER

SMC SOLENOID VALVE  VT4115

BOSCH 4500PSI 315BAR PRESSURE REDUCING VALVE 0 811 150 234

NUMATICS R22KG02I FLEXIBLOK FRL SERIES REGULATOR

CKD SOLENOID VALVE BLOCK  AG33-2N-2

YUKEN THROTTLE & CHECK MODULAR VALVE MSW-01-X-30

V-SAFE LOCK OUT FOR VALVES *NEW*

ASCO 110/120V 9 WATT SOLENOID VALVE 8320A9 104287

JAMESBURY TORQUE HANDLE LK-291

M. WOITE 300 PSI 1 INCH NPT VALVE, 1.4404-606305

PARKER, 5000PSI, DIRECTIONAL CONTROL VALVE, PRM3PP17KNS, *NEW*

SKINNER *  ELECTRIC VALVE * A3DB2177

ANDERSON GREENWOOD * INSTRUMENT MANIFOLD * 02-2565-541

PARKER 500 PSI 35 BAR 15 GPM 57 LPM HYDRAULIC CHECK VALVE  9F800S

LUBRIQUIP MANIFOLD DIVIDER VALVE MSP-30S

PARKER 3000 PSI 25 GPM 95 LPM FLOW CONTROL VALVE  F1200S

VERSA SOLENOID VALVE LSM-2301-80

1-1/4" BRASS BALL VALVE CW617N NNB

APOLLO BALL VALVE 3/4 C.S. 1000 WOG

BOSCH * HYDRAULIC VALVE * 0 811 403 114

NUMATICS 082SS615MX36G61 W/ 225-369B SOLENOIDS ON MAINFOLD

1" SHUT-OFF BALL VALVE PN40 MS58

SPEAKMAN  1/2" SS STAY-OPEN BALL VALVE  SSBV2

NUMATICS 1/8"NPT, 5-PORT, PNEUMATIC SOLENOID VALVE 11PAD4410 *NEW, SEALED*

SMC 1 VALVE MANIFOLD BASE

FESTO SER.T602 VALVE MFH 3-1/8-SEU NIB

NUMATICS 1/2" NPT FLEXI-BLOK REGULATOR R32RG04L

NORGEN 150PSIG INLET 60PSIG OUTLET PRESSURE REGULATOR 11-018-101

PILOT * PRESSURE VALVE  * D 700121-89

FESTO 2-16BAR, 5/2 SOLENOID VALVE VL-5/2-D-2-C *NEW*

VERSA-CUBE 1/8"NPT REGULATOR VR3A DA

AUTOMATIC VALVE COMPANY, OPERATED SOLENOID VALVE 409B033B9K

SMC NAR4000-NO6 PRESSURE REGULATOR 0.05-0.85MPA NEW

VERSA 3-WAY GENERAL VALVE ESM-3301-44-MAE-3-A120

NUMATICS 150 PSIG, 120V PNEUMATIC VALVE 134SA400K

SMC VHS40-N06-Z 15-150 PSI VALVE NEW

LUBRICATION SYSTEMS SINGLE BALL STEEL CHECK VALVE 509-350-010

HD BAUMANN INC. CONTROL VALVE ACTUATOR 23-26-200 104553

NUMATICS, 14.5-145 PSIG AIR, 1/8" & 1/4" NPT, PILOT VALVE L12PP6520000000

PARKER 4Z-B2LJ-BP 1/4" 1500 PSIG BALL VALVE, NIB

PARKER FLUID CONTROL 7321KBN3SN00D1P3 SEALED

KEPNER 1/2" NPT 3 PORT CHECK RELIEF VALVE, 2062 *NEW LOT OF 2*

OTHER * WATTS REGULATOR BALL VALVE 3/4"  * 3/4 600

TREGASKISS SPRAYER CHECK VALVE NIB TS-500-20

PARKER INCLINE AIR VALVE B050BB5490

KITZ 400WOG BALL VALVE 3/8"

VITON SEAL KIT NIB 722394

BINKS * HP 2 WAY SS BALL VALVE * -

NUMATICS NUMATROL RELAY VAVLE  RA7

SMC 24VDC SOLENOID VALVE W/ GASKET VPN-6-FG-D *NEW*

SMC 0.15 0.7MPa SOLENOID VALVE SY3120-5LZ-C4

GEMINI VALVE 720 CWP 1-1/2" NPT BRASS MANUAL VALVE, 76-1-RT-1 *NEW*

CF FLUID CONTROLS 3/4 BALL VALVE F11SR-CF8M

NUMATICS VALVE TM0-2002 *NEW*

BURKERT 3/8" NPT 24V SOLENOID VALVE, 0280 *NEW*

FESTO PRESSURE REGULATOR VALVE  LRMA-QS-4

HYDRONORMA * HYDRAULIC VALVE  * DBDS10K18/200 B TUV.SV. 9

INLINE 1" BALL VALVE CF8M 103968

POWERS PROCESS CONTROLS * SOLENOID VALVE * 2651005

ARO REGULATOR VALVE  127 121-000

HUMPHREY 24VDC 4.5 WATTS SOLENOID VALVE 410

ARMSTRONG BALANCING VALVE, S.S. 3/4 INCH MANUAL ACTUATOR, NNB

APOLLO 600 WOG 3/4" NPT BRONZE BALL VALVE

GRACO INC, 557746 PROXIMITY CYCLE SWITCH NNB

VERSA VALVES FOUR-WAY VALVE VLB-4504 NIB

ASK 6-POSITION PRESSURE SWITCH VALVE SV-614

HYSON PRODUCTS 0-6000PSI PRESSURE VESSEL VALVE

SMC REGUALTOR CHECK VALVE  AR40-N04-Z

UNKNOWN MFG * 3/4" CHECK VALVE BRASS   *  GGA-580

PARKER 150 PSI 3-WAY POPPET VALVE, D04211000 *NEW*

FLOW-TEK CLASS 150 275PSIG 316SS 3/4" BALL VALVE , NNB F15

TRABON-MANZEL LUBRIQUIP FLOW CONTROL MODULAR DIVIDER VALVE, D05

VICKERS 24VDC 1.8AMP PILOT VALVE 02 357910 PA4DG4SAW 0160 H 60 S558 *NEW*

NUMATICS 150 PSI, 120V PNEUMATIC VALVE 134SS500K

COMPLETE SOLENOID VALVE 04F20C3118BDFGC05

NUMATICS 24VDC 6.0W PNEUMATIC SOLENOID VALVE 225-372B

POWELL 1/8", CF8M 200, GATE VALVE

OMAL PNEUMATIC SOLENOID VALVE DC21-26V

CRANE 8" 500WOG FLANGED GATE VALVE, LOT OF 2, REFURBISHED

REXROTH HYDRAULIC DIRECTIONAL VALVE  Z4WE 6 W68-30/EG24K4/V

FLUTEC 24VDC SOLENOID VALVE, 913800-119

FESTO PNEUMATIC VALVE REPAIR KIT, 105302, SEALED