1799-COVZC現(xiàn)貨

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態(tài)變量和臨時(shí)變量(暫態(tài)變量)兩種。參數(shù)是在調(diào)用塊和被調(diào)用塊間傳遞的數(shù)據(jù)。靜態(tài)變量和臨時(shí)變量是僅供邏輯塊本身使用的數(shù)據(jù)。表5.1給出了局部數(shù)據(jù)聲明類型，表中內(nèi)容的排列順序也是在變量聲明
表中聲明變量的順序和變量在內(nèi)存中的存儲(chǔ)順序。在邏輯塊中不需使用的局部數(shù)據(jù)類型，可以不必在變量聲明表中聲明。
表5.1 局部數(shù)據(jù)類型
變 量 名 類 型 說(shuō) 明
輸入?yún)?shù) In 由調(diào)用邏輯塊的塊提供數(shù)據(jù)，輸入給邏輯塊的指令
輸出參數(shù) Out 向調(diào)用邏輯塊的塊返回參數(shù)，即從邏輯塊輸出結(jié)果數(shù)據(jù)
IO參數(shù) In_Out 參數(shù)的值由調(diào)用塊的塊提供，由邏輯塊處理修改，然后返回
靜態(tài)變量 Stat 靜態(tài)變量存儲(chǔ)在背景數(shù)據(jù)塊中，塊調(diào)用結(jié)束后，其內(nèi)容被保留
臨時(shí)變量 Temp 臨時(shí)變量存儲(chǔ)在L堆棧中，塊執(zhí)行結(jié)束變量的值因被其它內(nèi)容覆蓋而丟掉
對(duì)于功能塊FB，操作系統(tǒng)為參數(shù)及靜態(tài)變量分配的存儲(chǔ)空間是背景數(shù)據(jù)塊。這樣參數(shù)變量在背景數(shù)據(jù)塊中留有運(yùn)行結(jié)果備份。在調(diào)用FB時(shí)，若沒(méi)有提供實(shí)參，則功能塊使用背景數(shù)據(jù)塊中的數(shù)值。操作系統(tǒng)在L堆棧中給FB的臨時(shí)變量分配存儲(chǔ)空間。
對(duì)于功能塊FC，操作系統(tǒng)在L堆棧中給FC的臨時(shí)變量分配存儲(chǔ)空間。由于沒(méi)有背景數(shù)據(jù)塊，因而FC不能使用靜態(tài)變量。輸入、輸出、IO參數(shù)以指向?qū)崊⒌闹羔樞问酱鎯?chǔ)在操作系統(tǒng)為參數(shù)傳遞而保留的額外空間中。
對(duì)于組織塊OB來(lái)說(shuō)，其調(diào)用是由操作系統(tǒng)管理的，用戶不能參與。因此，OB只有定義在L堆棧中的臨時(shí)變量。
1) 形參
為保證功能塊對(duì)同一類設(shè)備控制的通用性，用戶在編程時(shí)就不能使用具體設(shè)備對(duì)應(yīng)的存儲(chǔ)區(qū)地址參數(shù)(如不能使用I1.0等)，而是使用這類設(shè)備的抽象地址參數(shù)。這些抽象參數(shù)稱為形式參數(shù)，簡(jiǎn)稱形參。將該設(shè)備的相應(yīng)實(shí)際存儲(chǔ)區(qū)地址參數(shù)(簡(jiǎn)稱實(shí)參)傳遞給功能塊，功能塊在運(yùn)行時(shí)以實(shí)參替代形參，從而可通過(guò)調(diào)用功能塊實(shí)現(xiàn)對(duì)具體設(shè)備的控制。當(dāng)對(duì)另一設(shè)備控制時(shí)，同樣也可通過(guò)調(diào)用實(shí)參將其傳遞給功能塊。
形參需在功能塊的變量聲明表中定義，實(shí)參在調(diào)用功能塊時(shí)給出。在功能塊的不同調(diào)用處，可為形參提供不同的實(shí)參，但實(shí)參的數(shù)據(jù)類型必須與形參一致。用戶程序可定義功能塊的輸入值參數(shù)或輸出值參數(shù)，也可定義一參數(shù)作為輸入輸出值。參數(shù)傳遞可將調(diào)用塊的信息傳遞給被調(diào)用塊，也能把被調(diào)用塊的運(yùn)行結(jié)果返回給調(diào)用塊。
2) 靜態(tài)變量
靜態(tài)變量在PLC運(yùn)行期間始終被存儲(chǔ)。S7將靜態(tài)變量定義在背景數(shù)據(jù)塊中，當(dāng)被調(diào)用塊運(yùn)行時(shí)，能讀出或修改靜態(tài)變量；被調(diào)用塊運(yùn)行結(jié)束后，靜態(tài)變量保留在數(shù)據(jù)塊中。由于只有功能塊FB有關(guān)聯(lián)的背景數(shù)據(jù)塊，因此只能為FB定義靜態(tài)變量。功能塊FC不能有靜態(tài)變量。

ACCURAY MP30 100638-003 VME SCANNER MODULE BOARD CARD VMEBUS 51627
ACCURAY 064829-002 USPP 064829002
ACCURAY 086158-004 SIO6 A SCANNER CONTROL BOARD MODULE CARD PCB 86158 51625
MOTOROLA ACCURAY 100638-002 MP30 ABORT RESET CARD MODULE 59021
ACCURAY IRPC 086161-002 SCANNER IR PULSE SCANNER CARD BOARD 51646
ACCURAY 18383-004 NSPP 18383004
ACCURAY 712112007 USPP 712112007
ACCURAY 083156 83156 002 FDPI EC SCANNER PCB PRINTED CIRCUIT CONTROL BOARD 51750
ACCURAY ABC4 086149-002 SCANNER ANALOG PCB PRINTED CONTROL CARD BOARD VME 51643
ACCURAY 60155750-001 NSFP 60155750001
ACCURAY ABB 074519-001 SPI FB BOARD 074519001
ACCURAY 0-061588-001 USPP 0061588001
ACCURAY 18383-004 USPP 18383004
ACCURAY ABB 61589-002 PRC BOARD 61589002
ACCURAY NA-B-0-083103-?001-B NSPP NAB0083103001B
ACCURAY NA-B-8-083103-?002-B NSPP NAB8083103002B
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ACCURAY 3064843002 NSPP 3064843002
ACCURAY 70560-701 JK1 JK2 CONNECTOR CONTROL BOARD MODULE CARD 59025
ACCURAY 8-061588-002 USPP 8061588002
ACCURAY 085345-001 USPP 085345001
ACCURAY 6-082156-002 SCANNER PCB PRINTED CIRCUIT CONTROL BOARD MODULE CARD 51999
ACCURAY 064844-002 USPP 064844002
ACCURAY 61595-003 SCANNER BOARD EXCELLENT CONDITION
ACCURAY 061595-003 61595 SCANNER PWA SSI SENSOR CONTROL BOARD 51623
ACCURAY 085165-001 NSFP 085165001
ACCURAY AU-7-055490-00?2 RAWSTOCK BODY DRY WT REMOTE DIGITAL READOUT 56755
HONEYWELL ACCURAY BMDX001A-002 SCANNER CONTROL BOARD CARD PCB 51970
ACCURAY 87-2362 G1UO1200 SCANNER CONTROL PC PCB CIRCUIT BOARD MODULE CARD 51995
ACCURAY 083892-003 USPP 083892003
ACCURAY 7-083882-001 USPP 7083882001
AccuRay 064844-002 Proc. Interface Board w/AD Convertor
ACCURAY 3-064843-002 B PROCESS INTERFACE CIRCUIT BOARD MODULE CARD 57479
AccuRay 2-067441-002 Rev A Printed Circuit Board
ACCURAY 067442-003 USPP 067442003
ACCURAY 83883-002 USPP 83883002
Accuray 0-083152-001 Circuit Board #26433

1799-COVZC

72V AMETEK LOW WIND GENERATOR MOTOR
Ametek USG Pressure Gauge 132784 P1929
Ametek Accuforce AF5-R-ND Gage with Load Cell, Scale, Lab, Tool, Test Equipment
Ametek Hunter Spring 50 lbs. Mechanical Force Gauge
Ametek Dixson BB101P Programmable Bargraph 0 Horiz
Ametek Brushless 24 VDC Vacuum motor and Driver
Ametek Accu Force Torque Chek Digital Torge Gauge 0-200 Oz In
2 NEW AMETEK 1025-D1SP 1025D1SP FOOT AND PALM SWITCH
AMETEK PANALARM 50A1-120A RELAY AUX 120VAC 60HZ 8.5VA - USED w/GUARANTEE
Ametek Gemco Patriot 950A1-6-F-X-X-?X-10-X Quik Stik LDT
Ametek Gemco Patriot 951A-C1-0100-N?2-X-E Quik Stik LDT
Ametek Prestolite 350 Amp Relay NSN 5945-01-165-10?65
AMETEK CONTROLLER 24VDC, 5A, #48132-01, 6NV85, 11-52VDC
AMETEK RO-3300 REVERSE OSMOSIS SYSTEM
Dixson Instruments Bargraph BB101 AJTX4 / 20MADCV8850 Ametek NEW
AMETEK Brushless Blower 24VDC, 2.5A, 36CFM, Vacuum 13.0
Pittman/Ametek Motor, 19.7:1 Ration GM9413C555
AMETEK 1025A1DPX DOUBLE POLE FOOT SWITCH
NOS! AMETEK SPRING RESILIENCY TESTER A799571 6635-00-470-15?47
NEW AMETEK WATER FILTRATION RB25-20 SEDIMENT CARTRIDGE 25 MICRON NOMINAL
Lamb Ametek 117572-12 Vacuum Blower
~ Lamb Ametek 116757-13 2-stage 5.7" Vacuum Motor M-W
AMETEK 4M949 VACUUM MOTOR NEW 120V 4M949
Ametek Lamb Vacuum Cleaner Motor, 116392-00
AMETEK 115923 4M903 THRU-FLOW VACUUM BLOWER/MOTOR 2-STAGE 5.7" 120V
Ametek Lamb 115v 50/60hz Vacuum Motor 115962
Ametek Lamb 120v 50/60hz Vacuum Motor 116297-00
AMETEK LAMB VACUUM MOTOR 116757-13 NEW 120 VOLTS
Lamb-Ametek #119433-13 24V 5.7 3 Stage Vacuum Motor
Ametek Prestolite Contactor; 24V; #JFA-4002A; #4050-421
AMETEK CONTROLS 93PSG0002DD7AC / 93P DIGITAL PRESSURE
Drexelbrook Ametek Enclosure with 700-0001-016 Series Sensing Element *NEW*
AMETEK 89PGTB300G2CB PRESSURE TRANSDUCER 300 PSI NEW
AMETEK PHOTO DIODE ASSEMBLY PART NUMBER 471130901
Ametek RELAY 1500GL1S8OCX NIB
Ametek Drexelbrook Dumpstar Level Control Model 406-6000 700-0202-036
Ametek Lamb Electric Vacum motor
AMETEK LN-150 INSPECTION FORCE GAGE
Pittman/Ametek Motor, 38.3:1 Ratio GM9413D109
AMETEK PANALARM SC100-120A NEW 8 PIN / 11 PIN RELAY SC100120A
AMETEK Rotron Motor M22F055-3008-0?28-3HIS-3471SF?-CCW 27.6 VDC

1799-COVZC

AMETEK AIR VOLUME CONTROL
Ametek Mechanical Force Gauge LKG-2 with case
AMETEK PRESSURE GAUGES VACUUM V500 1/4"LM
NEW AMETEK VACUUM GAUGE 0 TO 30 INCHES Hg 1X583
AMETEK DREXELBROOK 506-6000 LCS POINT LEVEL CNTL MANUAL
Ametek T-645 Reservoir for T-620 Hydraulic Hand Pump
Ametek 2-Volt 9-18 Volt Gauge 0A0D40 Auto/Marine NGI 2 Blk
Lot of 3, Panalarm Ametek Relay 70-TCF1-12 UNUSED
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AMETEK HUNTER L-20M MECHANICAL GAGE
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AMETEK DIXSON TACHOMETER 0-3500 RPM W/HOUR METER24V NEW
Ametek Suspended Electrode Lot of 2
RILEY AMETEK PANALARM 50-F1 RELAY 24VDC 24V 24 VOLT VDC
AMETEK USG 171732AGL GAUGE 1/4 NPT NEW 5000PSI
Ametek RO-3167 Reverse Osmosis System Membrane 24Gpd Water Filter
US GAUGE AMETEK 3" PRESSURE TEST GAUGE 0 - 20 PSI
Ametek 115757- P Vacuum Motor
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AMETEK WINDJAMMER BLOWER MOTOR 1-3/4" FILTER 551692
NEW AMETEK SOLFRUNT 1980 PROCESS GAUGE, 30-0-60 PSI
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AMK AMKaSYN AN40 Power Supply Module #6881LR
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AMK/AMKASYN 45621-0042-745?173 INVERTER DRIVE ***XLNT***
APC PDUM160H-B Symmetra PX Battery Enclosure tested spare
APC SYCF40KF USPP SYCF40KF
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Lucent ADAX APC7 SS7 Controller 2x 500Mhz Xeon Server
Snap Tool Box
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New AMD Universal Interrupt Controller PN# AM9519APC

1799-COVZC

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