ABB NTCL06

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流程控制指令，用以控制程序運行流程。PLC的用戶程序一般是從零地址的指令開始執(zhí)行，按順序推進。但遇到流程控制指令也可作相應(yīng)改變。流程控制指令也較多，運用得好，可使程序簡練，并便于調(diào)試與閱讀。

狀態(tài)監(jiān)控指令，用以監(jiān)視及記錄PLC及其控制系統(tǒng)的工作狀態(tài)，對提高PLC控制系統(tǒng)的工作可靠性大有幫助。

當(dāng)然，并不是所有的PLC都有上述那么多類的指令，也不是有的PLC上述幾類指令。以上只是指出幾個例子，說明要從哪幾個方面了解PLC指令，從中也可大致看出指令的多少及功能將怎樣影響PLC的性能。

除了指令，為進行通訊，PLC還有相應(yīng)的協(xié)議與通訊指令或命令，這些也反映了PLC的性能。

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WESTINGHOUSE GATE DRIVE ID7750G01 / 5881C51G REV-2WESTINGHOUSE 3-POLE, 600VAC, 2000A CIRCUIT BREAKER PA32000F W/ 1600A TRIP UNITWESTINGHOUSE * CIRCUIT BREAKER 20A 600V * 1222033VICKERS HYDRAULIC VALVE DG4V-3S-6C-M-FP?BWL-B5-60VICKERS HYDRAULIC VALVE DG4V-3S-6C-M-FP?BWL-B5-60
 
BUFFALO ABRASIVES 4X2X5/8 6207 RPM GRINDING WHEEL, AA46-K5-V40 *NEW*
 
HAMILTON FM 6 X2-1/2 SWIVEL CASTER FORGED STEEL S-FM-6FH *NEW*
 
RBC 1/8"NPT CAM-FOLLOWER S24 *NEW*
 
PRODUCTION TOOL COMPANY 36568, ASSIST HANDLE, 1/4" HEX, LOT OF 6, NEW IN BAG
 
AMETEK 3189-15-S 0-15PSI 3 1/2 PRESSURE GAUGE, NIB
 
RELIANCE ELECTRIC AUX MOUNTING BRACKET 701819-1 7ACK NEW

ZEC 8.500 RPM 7" X 7/8" ABRASIVE GRINDING DISCS, 5PK, 24SC *NEW*
 
SMC SOLENOID VALVE VSS8-6-FG-D-3EZ?-V1
 
3M 3"X7/8"X250" MICROFINISHING FILM DISCS 54470 / 268L *NEW LOT OF 250*
 
POHL 1/2"DIA, 5"OAL, END MILL *NEW*
 
KENNAMETAL HOLE FINISHING SYSTEM KM40S25EMCLNL4 *NEW*
 
TWIT BIT B&S 1 RHS 4 FLUTE 8 1/2" LONG
 
BROWN & SHARPE 1-3/8" 6-FLUTE END MILL 9F
 
PCISION BRAND 3/4X1-1/8 ARBOR SHIM 25180
 
3M / HOOKIT 3" x 7/8" DISC HAND PAD 82457 *NEW LOT OF 10*
 
BIMBA FCP8 QUIK-FL FLOW CONTROL VALVE, NEW IN BAG
 
MAPAL-WWS APPROX 12-5/8" OAL BORING TOOL, 305030556-80/2 *NEW*
 
KITZ SWING CHECK VALVE CF8M SCS14 2-150
 
LAVALLE & IDE L&I, 29 MM / 1.1417" REAMER, 11-1/2" OAL, 12 FLUTES, NEW IN TUBE
 
CHRISLYNN 7/16-14 SIZE THREAD INSERTS 83122 *LOT OF 31 NEW*
 
L&I 22.225MM 7/8 503 CHUCK REAMER 8750 M2 / A8-6 B
 
SIEMENS SIMATIC S7-1200 CPU 6ES7 214-1AE30-OXBO
 
PARKER A-LOK 1/2"NPT 3/4"NPT TUBE FITTING 12-S *NEW*
 
PARKER 6"OAL, 2-3/4"O.D, 1-7/8"I.D, FILTER TXX3-10-B *NEW*
 
BELL & GOSSETT 6" X 8" CENTRIFUGAL PUMP, NO LABEL
 
ITT S316 SIZE 6" KNIFE GATE FABRI-VALVE %FV-C3702237500
 
HODGE 8FT X 3FT X 2FT 2-DOOR SHOP CABINET
 
STOCKHAM 300S 1000OWG 3/4" GATE VALVE

TB WOOD'S SURE-FLEX SPACER HUB 7SC-H 1-5/8"
 
HILTI 3/4" x 6 -5/8" ADHESIVE CAPSULE ANCHOR HVU 3/4"X65/8" *NEW* BOX OF 4
 
YANKEE 302, 3 MM COUNTER BORE CUTTING TOOL, 0.2362" X 0.1377", 4-1/8" OAL, HSS
 
PHD INC. CYLINDER 08373320-01 / 12 x 3/4 -BB-M *NEW*
 
A.O.SMITH VARIABLE SPEED DC MOTOR 1/4 HP 1200 RPM 21736200
 
KLEIN 50473-3/4" BENDER HANDLE, 3/4" NPT, 38" LENGTH
 
LAKE CITY PRODUCTS 1/2", 150', EXPANDED JOINT SEALANT *NEW*
 
Newly listedCIRCLE SEAL ASME RELIEF VALVE M5159T-4M (L)
 
WIDELL 6-FLUTE 1-3/4-5 HS H7 HAND TAP 313093
 
9-1214-21 BLUE DIE SPRING, 3/4" X 3-1/2", LOT OF 2, NEW IN BAG, SEALED
 
HEXAGON THREAD DIE 1-3/4" -10
 
ALLEN BRADLEY MINI 4 PIN FEMALE CONNECTOR 871A-TS4-N1 NEW
 
NICHOLSON 8" HALF ROUND FILE 21857 *NEW*
 
BREWER MACHINE 3" SHAFT 1" RING TENSIONERS POSITIONERS & IDLERS S02 *NEW*
 
union BUTTERFIELD 3/4-82 S/FL C/SINK
 
IDEAL .69-1.25D, SAE SIZE 12, CLAMP 62M12, BOX OF 10 *NEW*
 
union TAPS 10-24 N.C. H.3 H.S.G. 10-11021 1 SET 1528-S NIB
 
APPLETON 3/4"NPT PENDANT MOUNTING HOOD VA75 *NEW LOT OF 2*
 
LITHONIA LIGHTING 120V, FLUORESCENT LUMINAIRE 578640, S 1 15PH 120 *NEW*
 
VICKERS 1"NPT, FILTER MANIFOLD OFRS 25 S 25M 10 *NEW*
 
RIDGID 1/2"-3/4" NPT RIGHT HAND HIGH SPEED PIPE DIES FOR STAINLESS STEEL
 
MARTIN 3/8" PITCH 1/2" WIDE BELTS G-3 STYLE TIMING PULLEY, 72L050 SD *NEW*
 
PARKER D3W20HNYK5 30, DIRECT CONTROL SOLENOID VALVE, HYDRAULIC, 1/2" NPT, NIB
 
HILTI 3/4" x 5-1/2" MECHANICAL ANCHOR 00045375 *NEW, LOT OF 20*
 
SKF BEARING ADAPTER S16-2 11/16
 
STOCKMAN VALVE HANDLE LKG DEV F/1.1-1/4"T/S-2?55 *NEW* LOT OF 2