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*是穩(wěn)定,第二是穩(wěn)定,第三還是穩(wěn)定,而穩(wěn)定不單是硬件方面,軟件其實也非常重要,再有就是抗于擾。這里只談PLC軟件。 我把PLC程序規(guī)范為以下幾個組成部分： 
一、系統(tǒng)初始化， 
二、過程或狀態(tài)的描述(相當于繼電、接觸控制中的中間繼電器)， 
三、人機操作控制(手動操作，參數(shù)修改等)， 
四、設備控制輸出(電機、閥等)， 
五、通信(各控制設備間的互鎖和數(shù)據(jù)交換)、 
六、過程或狀態(tài)的故障描述， 
七、報警輸出和故障位置等信息顯示， 
八、生產(chǎn)過程報表(產(chǎn)、質(zhì)量等)。 

鄭娟萍

廈門仲鑫航自動化設備有限公司

下面主要談談過程或狀態(tài)的描述和設備控制輸出，因為這基本上是程序的主要部分。
程序好壞的標準：穩(wěn)定、易調(diào)試、易修改、易擴展、易讀、實時性(快)。在這么多年的實踐中，我感到先由過程或狀態(tài)的描述得到各種狀態(tài)變量，再對設備輸出進行編程能比較好的達到上述目標，可能它在快的方面有所欠缺(因為程序長一些)但這*可以從其它方面得到解決(例如中斷)。這種想法主要源自數(shù)學上的狀態(tài)方程：Q=f(S1，S2，S3……..,Sn)其中Q為設備輸出,S1、S2、S3…….Sn為狀態(tài)變量(包括輸入輸出)。f是由指令系統(tǒng)組成的算法。

FESTO MX-2-1/2-MS-NPT 34918

MAC SOLENOID VALVE 257B-111CAAA

APOLLO VALVE CF8M  2000WOG

NUMATICS PNEUMATIC VALVE 123SA1400K

FESTO VALVE MSEB-3-24V DC

NIBCO 125 SWP 200 CWP 2" BRONZE CHECK VALVE, S-413 *NEW*

ASCO RED HAT SOLENOID VALVE 302088

TRUELINE AUTOMATED F8112 KNIFE GATE VALVE HT65

CARRARO PRESSURE REDUCTION VALVE 147171

WATTS REGULATOR 125 PSI 210?°F 3/4"NPT 40XL RELIEF VALVE, M12

REXROTH LFA 40 KWA-62/ 2 WAY CARTRIDGE VALVE

VICKERS HYDRAULIC SOLENOID COIL NIB 507833 CS2

PARKER 24V .33A DOUBLE SOLENOID VALVE, D1VW20DNJGLV581XB755

SMC 0.1-0.85MPA, 3/8"NPT, REGULATOR NAR3060-N03

VICKERS SOLENOID VALVE 02-109824

UNKNOWN MFG * 400 PSI TYPE A361 VALVE  * 08359

DELTROL * EXHAUST VALVE LOT OF 2  * EVEN-125A

NUMATICS SOLENOID COIL 92077TP

FLOWSERVE 1/2IN. NPT 3PIECE 2 WAY FLOW CONTROL BALL VAVLE DN15-PN63

1/4"- 1/8" SHUT OFF VALVE

ASAHI/AMERICA 6" AV DIAPHRAGM VALVE  U-PVC-EPDM 102363

PARKER 150PSI 1034kPa PNEUMATIC SOLENOID VALVE B511ABB53C

NUMATICS 24VDC 4.0W PNEUMATIC SOLENOID COIL 236-384 NIB

VICKERS 3000PSI 3GPM FREE FLOW VALVE VCL6F05AA *NNB*

NUMATICS PNEUMATIC VALVE SERVICE REPAIR KIT MK8-K1 NIB, LOT OF 3

FESTO 0-10BAR, 1/8" NPT, PNEUMATIC VALVE VL/O-3-1/8-B-NPT *NEW*

HYTORK 280 ACTUATOR W/ VELAN 316SS 4" VALVE / PMV POSITIONER P-2000

WILDEN * REBUILD KIT NIB * T2-P/R

LUBRIQUIP DIVIDER VALVE F95, MSP-35S

NUMATICS NUMATROL VALVE, TM0-2002 *NEW SEALED*

FESTO FLOW CONTROL SENSOR GRU-1/4B

FESTO 232 PSI VALVE MANIFOLD SUBBASE, VIGK-04-D-1, NNB

EASY READ DELTROL FLUID VALVE BRASS 2-3/4" LONG - 1/4" FEMALE THREAD

NUMATICS SOLENIOD VALVE 24VDC 225-285B

FOXBORO 8000 SERIES MAGNETIC FLOW TUBE 8008-BTR

KECKLEY 3/4" NPT 400 MOG CAST BRONZE Y-STRAINER VALVE, STYLE F-300 *NEW*

JOHNSON CONTROLS PENN SIZE 3/4" WATER VALVE V46AC-1 103324

SMC 0.1-0.85MPA, 3/8"NPT, REGULATOR NAR3060-N03 *NEW*

PARKER 1/8NPT 1/4"NPT 3 PORTS SOLENOID VALVE 341L534 *NEW*

BELL & GOSSETT .36 VALVE 2106512-2276136

CKD VALVE AB21-D2-2-2

CKD SC1-8 VALVE NEW

FESTO VALVE REPAIR KIT 121119 NIB

MAC 811C-PM-502JD-192 150 PSI SOLENOID VALVE W/ PME-502JD VALVE, NEW

KEYSTONE CI BODY 250 PSI 16 BAR BUTTERFLY VALVE

HAM-LET 1/4",3/8"NPT 5000PSI 2-WAY FLOW CONTROL VALVE R-PTFE/H-300/ST-1 *NEW*

PARKER 5000PSI HYDRAULIC VALVE CM2PPN 55

WORCESTER 1/4"NPT BALL VALVE 444TR11

KEYSTONE CI BODY 250 PSI 16 BAR BUTTERFLY VALVE

HAM-LET 1/4",3/8"NPT 5000PSI 2-WAY FLOW CONTROL VALVE R-PTFE/H-300/ST-1 *NEW*

PARKER 5000PSI HYDRAULIC VALVE CM2PPN 55

WORCESTER 1/4"NPT BALL VALVE 444TR11

MAC VALVES PNEUMATIC PRESSURE REGULATOR, PRA1A-KECB

AXCO SPARE PART KIT 302-279, 8210AC NEW

ASCO 110/120V SOLENOID VALVE 8320A23

HENRY VALVE COMPANY 1/2" SHUT-OFF VALVE 5164 *NEW*

SPORLAN THERMOSTATIC EXPANSION VALVE IBVE-5-CP100 *NEW*

CONTINENTAL HYDRAULICS DIRECTIONAL CONTROL VALVE VS12M-3A-GBL2-60L-H NNB

PARKER HYDRAULIC CHECK VALVE NIB C820S 102233

NUMATROL 1/8" NPT PRESSURE VALVE TMO-2112 *NEW*

FESTO 16 BAR, 5/2 WAY PNEUMAITC VALVE J-5/2-D-2C *NEW*

NIBCO BALL VALVE  T-FP600

NUMATICS SOLENOID VALVE 08255635K

CKD VALVE W4GB419-M-3 99694

PARKER 350 BAR HYDRAULIC VALVE, PRDM2PP06SVG15X797

PHD 5"OAL, CYLINDER HVRF1X11/4, 342840-01 901

LUBRIQUIP TRABON-MANZEL 5-8FT/LBS VALVE

NUMATICS 24VDC 6.0WATTS 150PSI PNEUMATIC VALVE W/ BASE I12SA43AM015W61 *NEW*

NULLMATIC 1/2" NPT PRESSURE REGULATOR, 42H30

CRANE 1-1/4"NPT 400 CWP BRONZE GATE VALVE 424

SCHRADER BELLOWS 120V 60HZ 1/8 ORIFICE 2 WAY SOLENOID VAVLE 4115-0115

SMC 0.1-1.0 MPa 3 PORTS HAND VALVE VHS401-N04-X1 NEW

BOHMER KUGELHAHNE 1" INNER DIA WELD-IN SHUT OFF VALVE DN 25 PN 40 *NEW*

MAC 24VDC, 8.5W, 150PSI SOLENOID VALVE 130B-611JB

SKINNER VALVE SOLENOID VALVE 120/60HZ 11WATTS 150PSI V55DB1150

SKINNER 120V 10W 5/16" ORIFICE 15 PSI SOLENOID VALVE, EF11C061

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

ANDERSON GREENWOOD CROSBY 961101MA DIRECT SPRING OPERATED PRESSURE RELIEF VALVE

NIBCO * 1/2" TRU-BLOC BALL VALVE * -

YARWAY PACKING SEATLESS BLOW-OFF VALVE, 965064-05 *NEW*

MILWAUKEE BRONZE HORIZONTAL SWING CHECK VALVE, ?", NEW

ROSS 2-PORT, 3/8"NPT PILOT CHECK VALVE 2751A3908

NIBCO * 700 PSI WP CONTROL SYSTEM VALVE * KT-505-4

ALCON SOLENOID VALVE 5-150PSI NACON4

FLUTEC 24VDC SOLENOID VALVE 913800-236 *NEW*

KEYSTONE 2" BUTTERFLY VALVE, NO HANDLE, F250

BRADLEY 3/4"NPT BALL VALVE S30-042 *NEW*

INLINE INDUSTRIES SOLENOID VALVE NV-NMR1-A1 NIB

FISHER BAUMANN 1IN, 3-13PSI, 2.5Cv UNIVERSAL GLOBE VALVE 32.24577S / DVC6010

SMC 120VAC 15-145 PSI 40°-140°F SOLENOID VALVE, NVSP4326-0009D

AIRCO 1/2"NPT 250PSI PNEUMATIC REDUCTION VALVE 801-0469 *NEW, SLIGHT SHELF WEAR*

ROSS CONTROLS 24VDC 2-8 BAR SOLENOID VALVE, W6077A2957 *NEW SEALED*

NUMATICS 3 WAY VALVE  NAF261000N14AO 30-145 PSIG NNB

NUMATICS PNEUMATIC REGULATOR 031RS700O *NEW*

PARKER HYDRAULIC CHECK VALVE, CM3P-20

MAC STRAIGHT CAM ROLLER, 180112 *NEW NO BOX*

SCHRADER BELLOWS 7AF11BA 120 PSIG

PHOENIX CONTACT VALVETRAB VAL-MS 230 IT ST

NUMATICS PRESSURE REGULATING VALVE 031RS700O

HAM-LET VALVES & FITTINGS BALL VALVE 100 *NEW*

WATTS 1-1/2"NPT BRONZE BALL VALVE 8714

WATTS 1-1/2"NPT BRONZE BALL VALVE 8726

ASCO RED HAT SOLENOID VALVE 8210D2

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

FESTO 3-16BAR, SAFETY ON/OFF VALVE HEL-D-MIDI

PARKER SOLENOID VALVE HA5VXBG0G9A

NUMATICS ACTUATOR PNEUMATIC VALVE REPAIR KIT, N98-2181 *NEW SEALED*

NACHI MODULAR VALVE OCP-G01-A1-21 *NEW*

PETER PAUL 120V 8.7W 1/16X3/32 ORIFICE SOLENOID VALVE, 23JK7YCV *NEW IN BOX*

MAC VALVES 24VDC 2.4W 120 PSI SOLENOID VALVE, 92B-LAB-000-DM-DFFP-1DN

UFM 0/10GPM 7/8" FLOW MONITOR MN-ASFL0GMV-6-200V.9-A3WL

MAC 120 PSI 24VDC 2.4W SOLENOID VALVE, 92B-BAB-000-DM-DFFP-1DN *NEW*

ASCO 30PSI 9.1W 60HZ 1/8"NPT GENERAL PURPOSE SOLENIOD VALVE T146839 *NEW*

MAC 110-120V 50/60HZ 2.9W 120PSI SOLENOID VALVE WITH MANIFOLD 92BAAB000DMDJAP1DG

NUMATICS 14.5-145 PSIG-AIR  1/4" NPTF SOLENOID VALVE, L12PP552O000000 *NEW*

NUMATICS 120V .09A 50/60HZ 150 PSIG-AIR SOLENOID VALVE W/ BASE, 082SA43AK

FESTO PNEUMATIC VALVE MANIFOLD NIB VL/O-3-1/4-NPT

JAMESBURY SPRING ACTUATOR VALVE CF8M CLASS-300 1-1/2-530S

MAC 20-120PSI, 24VDC, 6.4W, PNEUMATIC SOLENOID VALVE 92B-BAB-CJ2-DM-DDAP-1DN

PARKER 150 PSI 1/8 INCH NPT 3-WAY 2-POSITION SOLENOID VALVE, B3G0BB553C

NORGREN 150-300PSIG 10.3-21.0BAR PNEUMATIC REGULATOR VALVE R73G-3AK-RMN

FESTO PNEUMATIC VALVE REPAIR KIT, 105302, NIB

PARKER 1/4" NPT, 250PSI MAX, 175oF, 0-125PSI RANGE, PNEUMATIC REGULATOR 06R113AC

ASCO 110/115V REPLACEMENT SOLENOID COIL NIB 027478-001-D / 027-78-C01-D

MAC PNEUMATIC VALVE 57D-13-522BABA *NEW*

NUMATICS 150 PSIG-AIR MANIFOLD W/ 2 SOLENOID VALVES, I35SA415K

SUN HYDRAULICS SOLENOID HYDRAULIC VALVE, 0E-77-A2

NUMATICS 110/120V .05A 14.5-120 PSIG 3/8" NPT SOLENOID VALVE, 92178-2AC

TRUE BLUE DOUBLE ACTING 20W SOLENOID VALVE EASYMT4V12W20-P, NIB 105521

NIBCO * 1" TRU-BLOC BALL VALVE  * -

OTHER * ROSS LOCKOUT AND EXHAUST VALVE   * 1523 C 5012

NIBCO * GATE VALVE W/ NO HANDLE * 1/2"D

NUMATICS 24VDC, 4.0W, 150PSIG-AIR, PNEUMATIC VALVE I34BA400MP00061

ASCO * SOLENOID AIR OPERATED VALVE NNB * 8262A227

HAYWARD 4 MODEL 72 SIMPLEX BASKET STRAINER ST269-0400RF 2 102321

NUMATICS 24V SOLENOID VALVE  031SA4004000061

ASCO 125VDC SOLENOID COIL NIB 006174582G022

MAC VAC/25-150PSI, 24VDC, 2.5W, PNEUMATIC SOLENOID VALVE 6523B-000-PM-592DA

ASCO RED-HAT II 100PSI 1/8" 9.1/11.1W SOLENOID VALVE 8320G1 103106

NUMATICS VALVE 152JJ000000000 *NEW*

HONEYWELL VC2714-11 VALVE ACTUATOR

I.S.I. FLUID POWER 30-150 PSI 3/8" NPT PNEUMATIC VALVE, 375-81-001-81 SP *NEW*

NUMATICS 24VDC 4.0W 14.5-232 PSIG SOLENOID VALVE W/ BASE, I22BB615R061D61 *NEW*

MAC 24VDC 120PSI 2.4W SINGLE ACTING PRESSURE VALVE 92B-BAA-000-DM-DFFP-1DM *NNB*

MAC 24VDC 120PSI 2.4W SINGLE ACTING PRESSURE VALVE 92B-BAA-000-DM-DFFP-1DM *NNB*

NUMATICS 110/120V .11A 150 PSIG SOLENOID VALVE W/ BASE, I24SA43BK000030 *NEW*

ROSS 120V 60HZ 1-10BAR 3 POLE PILOT VALVE W6076B4431*NEW*

NUMATICS / ROSS, 14.5-232 PSIG, 120V, SOLENOID VALVE, I12BB5002P00030 / 316K33

WHITMAN 250PSIG, 250VAC,5A, BODY PRESSURE SWITCH P117G-25H-F52M *NEW, SEALED*

NUMATICS 100-120V 50-60HZ .06A 150PSI SOLENOID VALVE I23BA400KP *NEW*

FESTO PNEUMATIC VALVE NIB VL/0-3-1/4-NPT

MAC VALVES 24VDC, 5.4W, 3/8" NPT SOLENOID VALVE 92B-AAF-000-DM-DDAP-1DM *NEW*

PARKER INLINE FILTER 8F-F8L-50-EPR-SS

NUMATICS 1/" NPT PRECISION LIMIT VALVE, 0HA3-R *NEW SEALED*

LUBRIQUIP HYDRAULIC BLOCK 4509, NIB

SMC PNEUMATIC VALVE MANIFOLD VVQ4000-25A-1

LUBRIQUIP MINI DIVIDER VALVE MSP-5T L03

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

VORTEC .40" (10MM) TRANSVECTOR JET FLOW AMPLIFIER 901 NIB

ASCO 4" 125WSP HYDRAMOTOR CAST IRON GLOBE SAFETY VALVE H118AN132F1F26V16

WATSON / McDANIEL 3/4" NPT INVERTED STEEL TRAP 1032 *NEW IN BOX*

NUMATICS 120V .11A 50/60HZ 150 PSIG-AIR SOLENOID VALVE W/ BASE, 152SS400K

WHITEY B-46ZF2 VALVE 2500 PSI

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

FLOW-TEK F15-1 1/2" VALVE F30

VICKERS * VICKERS RELIEF VALVE * CT 06 B 50

JAMESBURY ACTUATOR ST-200 B ESPE POSITIONER W/ 3" VALVE 5150313600MT

CRANE 7&1/2E RISING STEM GATE VALVE, NEW LOT OF 2

DELTROL FLUID PRODUCTS VALVE 1000-02 FN F20B *NEW*

NUMATICS 24VDC 6.8W 14.5-232 PSIG SOLENOID VALVE, I34BB5004P12B61, NNB

BURKERT 450205P 20PSI 110V NEW

NUMATICS PNEUMATIC VALVE 122BA400R061D61 MISSING PARTS

STAUFF 5000PSI 2.4"NPT TWO WAY VALVE FBV2132-0001-M *NEW*

AUTOMATIC VALVE * PRESSURE VALVE 1/2" * CDB-7KX

SPIRAX SARCO 2-1/2" FLOAT KIT 55447 *NEW*

GRACO TRABON MODULAR DIVIDER VALVE MSP-20S

VICKERS FLOW CONTROL VALVE DGMFN 3 X A2W B2W 21

MARSHALL TOWN 1/4" MAX SHUT-OFF VALVE MT1512 41 / 00656A414-2 102192

PARKER 3000 PSI 8 GPM 3/8IN. NPT HYDRAULIC PRESSURE CONTROL VALVE, RA600S4 *NEW*

SWAGELOK SS-1KF4 NEEDLE VALVE

PARKER 2000 PSI 3 GPM 1/8" NPT BRASS HYDRAULIC FLOW CONTROL VALVE, F200B

NUMATICS 14.5-145PSI 3/8"NPTF 3-POSITION 4-WAY PNEUMATIC VALVE,  L23PP552O000000

HOLLAND ITT PUR-FLO 1 INCH TRI-CLAMP TUBE VALVE, 1-F-419-6-TM17-970

TRABON LUBRIQUIP FLOW CONTROL MODULAR DIVIDER VALVES, MSP-25S *LOT OF 2*

PARKER 40-150PSIG PNEUMATIC SOLENOID VALVE 422CAA13A23 *NEW*

BURKERT 00450205 20PSI 110V50 NEW

ASCO RED HAT SOLENOID REPAIR KIT 096875 NIB

VICKERS DIRECTIONAL VALVE W/ COIL 02-101726

MAC 110/120V 6.8W 50/60HZ 25-150 PSI SOLENOID VALVE, 6513B-000-PM-112DA *NEW*

NORTH, BALL VALVE LOCKOUT BS01R *NEW*

COMPACT AIR PRODUCTS VALVE BLOCK B158X12 NNB

TECHNO PLASTIC PVC PN 16 D32-1" DN 25 * DN 2.5

FOXBORO 8000 SERIES MAGNETIC FLOWTUBE 8010-8TR

1" BALL VALVE 600 WOG 201534 / 4/98 105646

GRACO * DIVIDER VALVE 3500 PSI * MSP-20T

BOSCH REXROTH REGULATOR VALVE, MOUNTING BRACKET BROKEN 0 821 302 446

UNKNOWN MFG * 1 " BALL VALVE 600 CWP  * PN40 MS58

ARO 3/8"NPT CHECK VALVE C03 *NEW*

PARKER 1/4", CHECK VALVE 451-1/4S2-65 *NEW*

SNAP TITE SINGLE OVERCENTER VALVE MHV40 TI65-404-4

REXROTH FLOW CONTROL VALVE 2 FRM 6 A 36-20/6

SAM MASS FLOW CONTROLLER SFC280E RC-4S

BANJO 2-1/8" POLYPROPYLENE CAMLOCK 200A 

VICKERS DIRECTIONAL CONTROL VALVE DG4V-3S-6C-M-FPA5WL-B5-60 99068

HR TEXTRON MANIFOLD VALVE / BASE 25001012-001 NNB

UNKNOWN MFG * 1/2" VALVE W/ PINACLE HANDLE * 1000 WOG

HERION GENERAL PURPOSE SOLENOID VALVE 81-117-36 W/ COIL 1259

WATTS * PLASTIC Y STRAINER 300PSI NIB * 0384766 / P 777-100

SHARPE 800 WOG CF8M 1/4 INCH NPT STAINLESS STEEL BALL VALVE W/ HANDLE, 58876

SMC PNEUMATIC SOLENOID VQ7-6-FG-D-3ZR

PARKER 5000 PSI DIRECTIONAL CONTROL VALVE, FM2DD-30 *NEW*

DYNAMCO VALVE D30S0K00 *NEW*

ASCO RED-HAT 150 PSI 1/2" NPT CHECK VALVE, V0127 *NEW*

NUMATICS * SOLENOID VALVE * 13BB53AMP00061

JAMESBURY ST-200 B 3" VALVE ACTUATOR W/ POSITIONER EP5N-PV90-TA S7-K1 103944

AUTOMATOR * ACTUATOR VALVE * 160 N

REGO NITROGEN REGULATING VALVE 14796SA 104183

APOLLO 1-1/2 INCH, BALL VALVE 83-507-01A

SWAGELOK CHECK VALVE SEAL KIT, SS-3K-CH16-NE *NEW LOT OF 4*

VAN AIR SYSTEMS INC MOTORIZED DRAIN VALVE MDV-200

SMC SOLENOID VALVE ASSEMBLY  VQ4400-5

STRATAFLO * 3/4" 200LB CHECK VALVE  * NO.200

LUBRIQUIP *  LUBRICATOR / CHECK VALVE NNB LOT OF 5 * *

PARKER 0-125PSI NPT PRESSURE REGULATOR 05R213AD 99561

PARKER 150 PSIG 1/4" NPT ROLLER CAM VALVE, CW1325 *NEW*

HAM-LET 1500PSI 170?°F 3/4"NPT VALVE H-510-3/4-H *NEW*

VICKERS 4570PSI FLOW CONTROL VALVE DGMFN-5-Y-B2W-30 *NEW*

PARKER 3 WAY 1/2"NPT BALL VALVE C11 *NEW*

SHAPRE 1"NPT 1000WOG FLOW CONTROL BALL VALVE 7CLJG

CRANE 1/2"NPT, 600WOG, BALL VALVE 9302S

TRABON LUBRIQUIP 3500 PSI FLOW CONTROL MODULAR DIVIDER VALVE, J05

MAC 0-120PSI PNEUMATIC REGULATOR BLOCK VALVE PR92C-KCCA *NEW*

LUBRIQUIP 1/8"NPT 1500PSI BALL CHECK VALVE C04 *NEW, LOT OF 2*

WAIRCOM 10 BAR 1/8 INCH NPT 3-PORT MECHANICAL SPRING POPPET VALVE, CS8 *NEW*

ASCO * 1-1/4" 120/110V 60/50 HZ SOLENOID VALVE * 8215C63

FAIRBANKS 8" GATE VALVE 104043

UNKNOWN MFG * 2 WAY FLOW CHECK VALVE 200WOG * 3/4"

WILKERSON 150PSIG REGULATOR VALVE R18-C3-C000

GRACO * MODULAR DIVIDER VALVE * NPSF

AUTOMATIC VALVE LEVER OPERATED SOLENOID VAVLE 407B033B9K *NNB*