A20B-0007-0060

A20B-0007-0060

程序簡短有可能會節省程序運行時間，但簡短與省時并不完全是一回事。

因為運行程序時間雖與程序所擁有指令條數有關，而且還與所使用的是什么指令有關，也就是與程序算法相關。PLC算法不同，執行的時間也不同。而且，有的指令，在邏輯條件ON時執行與在OFF時執行其時間也不同。另外，由于使用了流程控制指令，在程序中，不是所有指令都要執行等。所以，運行程序的時間計算是較復雜的。但要求其平均時間少，大時間也不太長是必要的。這樣可提高北京天拓四方科技有限公司是西門子工業自動化和驅動集團核心分銷商(一級代理商)及系統集成商PLC的響應速度。省時的關鍵是用好流程控制指令。按情況確定一些執行的指令，作部分，其余的可依程序進行，有選擇地執行，或作些分時工作的設計，避免大時間太長等。

要使程序易改，也就是要便于修改。

PLC的特點之一就是方便，可靈活地適用于各種情況。其辦法就是靠修改或重新設計程序。重新設計程序用于改變PLC工藝要求的情況，不僅程序重編，而且I/O也要重新分配。多數情況下不需要重編程序，做一些修改就可以了。這就要求程序具有易改性，便于修改。易改也就是彈性，要求只要作很少的改動，即可達到改變參數或更改動作的目的。1）參數設定盡量采用間接賦值的方法，常量參數值盡量使用符號名，做到見名知意；2）控制盡量使用中間存儲器（如M、W）作為媒介、中間層，隔離I/O在邏輯上的直接耦合，便于更改邏輯；3）盡量實現功能插件化模塊塊，使用戶可以“自由配置”，以實現即需即加、即加即用。在設計PLC程序的過程中，對于上述要求要同時兼顧和平衡，不能顧此失彼，得不償失。

 Tempco 31" 31327 1 460V 1500W Heater Cartridge

WESTINGHOUSE Contact Kit 373B331G18 SZ 00 3/4 Pole 

ALLEN BRADLEY MCC BUCKET SIZE 1 STARTER 2112A-BABD-24

 RIDGID 1-1/2" NPT RH 37845 PIPE DIES 37-845

BRYANT 20A 20 A 20 AMP 125/250V BLACK RECEPTICLE OUTLET

2  Cooper Halo Track Light Lighting L-942-MB L942MB

WESTINGHOUSE 250A 250 A AMP JB 3250NW 70E2985 SWITCH

Allen Bradley PanelView 900 2711-K9C8 2711K9C8 C L 

Sierra Switch Lot of 2 15A 120-277V A.C. Only Black

 Honeywell Comm Single Zone Thermostat T7300A 1005

 Simpson 25 0099 0-50 DC Direct Current Amp Annular

 RIDGID 1-1/4" NPT RH 37840 PIPE DIES 37-840

MAURO V01056 D6-9-129 D69129 15 1/8" 

SKF Flange Bearing YEL-210-115  1 15/16 "

 Gorman-Rupp 5373

 FACTORY AUTHORIZED ZZLE EA 19CY 905 EA19CY905 (2)

SKF Roller Ball Bearing 5317 

GE GENERAL ELECTRIC CONTACTOR CR353AC4AB1 

DODGE Pillow Block Bearing SCM-3-A 3" SCM3A 

UNKWN MAKE CP34 201 VALVE 

RIDGID 1-1/4" NPT RH 37840 PIPE DIES 37-840 

MORSE/RAIDER SPEED REDUCER XE1164 D07N RATIO 15:1 

Taylor Controller Sensitivity 1-50 S-12 RH LEFT 58S37B

Cutler Hammer E22MTGV6 E22V6 6V AC-DC PUSHBUTTON 

HUBBELL 15A 15 A 15 AMP 250V P-1946 DUAL RECEPTICAL

Taylor Controller Sensitivity 1-50 S-12 LH RIGHT 58S35B

 Schrader Bellows Coil 5110-001 5110001 120/60 35DC

Simpson Panel Meter Circuit Card S-5100530 S5100530

AQUAFLUSH DIAPHRAGM KIT P600-ECR-WS1-CS 1.6 GPF 

TORRINGTON ROLLER BEARING IR-1820 IR1820 IR 1820 

15  Pass&Seymour Legrand Vertical GFCI Cover CA26-GV

MAURO V01054 D6-7-59 D69129 19 3/4" 

General Electric GE Breaker 20 Amp A 20A 2P THQB

GOULD SHAWMUT 66510 600V POWER DISTRIBUTOR BLOCK 

Simpson Panel Meter Circuit Card S-5100524 S5100524

KILLARK 15A 15 A 15 AMP 125V 125 V BLACK RECEPTACLE

APOLLO 1/4" BALL VALVE 600 W06 600W06 

 Riegler T-Piece Fitting 254.39 Brass 1/2" Lot of 5

PRESCOLITE T072S LIGHT SHEILD REFLECTOR LOT OF 7 NIB

Simpson Panel Meter Circuit Card S-5100562 S5100562

SPORLAN REPLACEMENT PARTS KIT KS-MA42 KSMA42 

 Opcon Relay 8526A 100867 5 Amp RES 3 Amp IND 1/8HP

HUBBELL 30A 30 A 30 AMP 600V TWIST LOCK RECEPTACLE 

GOULD SHAWMUT 60308R 600V 30A 30 A AMP FUSE HOLDER 

BUSS KTK-R-3-1/2 KTKR31/2 LIMITRON FUSE 

SENIOR FLEXONICS 1/4" STEEL FLEX HOSE 12" IN LENGTH 

25) MULBERRY RECTANGULAR LAMPHOLDER COVER 30351 1H NIB

HUBBELL 30A 30 A 30 AMP 480V TWIST LOCK RECEPTACLE

Simpson Panel Meter H23550140020 200VDC 12-48VDC 

Parker Schrader Safety Lockout Valve LV41A 250 PSI

RIPPERT CONTROLLER 703031/50-001-0?00-00 065-01/000 

TRI-TRONICS PLUG-MATE DYNAMIC BRAKE LOAD DBL-1 DBL1 

Tempco Heater Band MBH06761 K 99 4 K994 800W 240V

BUSS FWH-35A FWH35A FWH 35A 35 a amp FUSE 

 Riegler Swivelling Socket 1/4" 74049 Lot of 4

GOULD SHAWMUT 60608R 600V 60A 60 A AMP FUSE BLOCK 

diaphragm pump ball V171 FLOAT LOT OF 2 

TB WOODS SG BUSHING SDS1316 SDSX1 3/16 

NDC / DANAHER MOTION MCD7 MANUAL CONTROLLER 18405-11

2) Allen-Bradley Real Coil 69A86 Size Sz 00 115/120V

 TIF Reflective Tape Silver TIF773 Lot of 10 IT982

ENEC R30 PUSH BUTTON LOT OF 4 250V 

 FASTENAL 442057-131280 UNION 1/2T x 3/8T LOT OF 3

MOELLER AT11-S-I ATT11SI IP65 LIMIT SWITCH 

REYLDS INDUSTRIES MIXER W/ PRESS OUT STATION MIXING

2) GUNTER AND COOKE 4" x 4" PATCH PAD THERMO HEATER

GILMAN SLIDER  A59562 13" L X 4" W X 1 3/4 H

PARKER 1 3/4" BUNAN DRAIN GLAND CARTRIDGE KIT RGGHL0171

Cutler Hammer Terminal Kit 624B100G02 Pack of 3 

LOVEJOY SHAFT COUPLING HUB L-050 COMPLETE W SPIDER 

BUSS HPF-1K0555 25A 20A 25 20 A AMP FUSE HOLDER 

  Name P05403179 5403179-1 P054031791 PMB LF RY428

DODGE DYNA SYNC PULLEY 113589 TL18L075-1108  

MITSUBISHI AC SERVO DRIVE AMPLIFIER MR-J2S-10A MR-J 

 Carling Switch 3A 250VAC 6A 125VAC B PB

 Myers Tire Supply 31456 C-4 C4 Coil

Continental Wire & Cable SE-2 AJ 907706 Fixture Wire

 CUTLER-HAMMER DEFINITE CONTACTOR C25DNF340 3P 24V

BELLOWS VALVAIR 1/4" AIR VALVE K125 1064 K125106453 

TELEMECANIQUE XS2M12PA370D IND. PROXIMITY SENSOR 

BROWNING TIMING BELT PULLEY 5/8" BORE 21LB075 

 RB Ball Valve 1/2" Fmle and Male S/S 125WSP 400WOG 

KRAUSS MAFFEI PC BOARD TE 500 A 7 15 TE500 5089390 

UNKWN MAKE 3/4" 3/4-C QUICK CONNECTS LOT OF 4 

4 MAURO V01059 D6-9-692/1 D6 9 692/1 D69692/1 

chung hu co. Magnetic Door Holder ITEM# 111 

GE CIRCUIT BREAKER TRIP UNIT TFK236T125 125A 125 A AMP

MAURO LOT OF 4 V01005 D6-3-M357-A D63M537A 

 Cooper Belden 9665 Cable 26 AWG 7 Conductor 300 V

Square D Thermal Unit 1-C45 C45 Lot of 2 

MRC Bearing H401 104KSZZG 

MAURO V01052 D6-4-1197 

RITTAL WERK OUTLET FILTER SK 3162 1A SK31621S 

 THOMAS BETTS COLOR-KEY C-TAP CONNECT 786210-54765 

 Consolidated Bearing 23948 M C/3 W/33 23948MC/3W/33

CANTEX LOT OF 24 514408 2" END BELLS NIB

TEMPOSONICS G SERIES SENSOR TRANSDUCER GHM0170MD601A1

AMERIDRIVES 203.5 FLEX HUB ROUGH 073580-000 K40860 

TB WOODS BUSHING SF214 SFX2 1/4 SG BUSHING 

Cattron RF Modem CAT-9610 CAT9610HDM RS-232 12-24VDC

49 MAURO V010545 5N-M4X12N 5N M4X12N 5NM4X12N 

UNKWN MAKE 600 CWP 1/2" BALL VALVE 

RITTAL WERK OUTLET FILTER SK 3161 1S SK 31611S 

 TRANE OUTSIDE AIR TEMP SENSOR 4190-1101 41901101

Timken Tapered Roller Bearing 526 

THAXTON PRESSURE PIPE TEST STOPPER PLUG 2-1/2 40 35

 In Box Square D Thermal Unit 1-C58 C58

Cutler Hammer Transformer C0100E1B 100VA 100 VA

MAURO LOT OF 4 V01058 D6-9-37 D6937 

MAURO V01048 D6-3-MP127 D63MP127 D6 3 MP127