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) 臨時變量
臨時變量僅在邏輯塊運行時有效，邏輯塊結(jié)束時存儲臨時變量的內(nèi)存被操作系統(tǒng)另行 分配。S7將臨時變量定義在L堆棧中，L堆棧是為存儲邏輯塊的臨時變量而專設的。當塊程序運行時，在L堆棧中建立該塊的臨時變量，一旦塊執(zhí)行結(jié)束，堆棧重新分配，因而信息丟失。
邏輯塊局部數(shù)據(jù)的數(shù)據(jù)類型
在變量聲明表中，要明確局部數(shù)據(jù)的數(shù)據(jù)類型，這樣操作系統(tǒng)才能給變量分配確定的 存儲空間。局部數(shù)據(jù)可以是基本數(shù)據(jù)類型或復式數(shù)據(jù)類型，也可以是專門用于參數(shù)傳遞 的所謂的“參數(shù)類型”。參數(shù)類型包括定時器、計數(shù)器、塊的地址或指針等，見表5.2。表5.2 參數(shù)類型變量
參數(shù)類型 大 小 說 明
定時器(Timer) 2 B 在功能塊中定義一個定時器形參，調(diào)用時賦予定時器實參
計數(shù)器(Counter) 2 B 在功能塊中定義一個計數(shù)器形參，調(diào)用時賦予計數(shù)器實參
塊：
Block_FB
Block_FC
Block_DB
Block_SDB 2 B 在功能塊中定義一個功能塊或數(shù)據(jù)塊形參變量，調(diào)用時給功能塊類或數(shù)據(jù)塊類形參賦予實際的功能塊或數(shù)據(jù)塊編號，如
FC 101、DB 42
指針(Pointer) 6 B 在功能塊中定義一個形參，該形參說明的是內(nèi)存的地址指針。例如，調(diào)用時可給形參賦予實參P#M50.0，以訪問內(nèi)存M50.0
ANY 10 B 當實參的數(shù)據(jù)類型未知時，可以使用該類型
1) 定時器或計數(shù)器參數(shù)類型
在功能塊中定義一個定時器或計數(shù)器類型的形參，功能塊就能使用一個定時器或計數(shù)器，而不需明確具體的定時器或計數(shù)器，等到調(diào)用該功能塊時再確定定時器或計數(shù)器號。這使用戶程序能靈活性地分配和使用定時器或計數(shù)器。當給定時器或計數(shù)器參數(shù)類型形參分配實參時，在“T”或“C”后跟一個有效整數(shù)，如T 100。
2) 塊參數(shù)類型
當定義一個作為輸入輸出的塊時，參數(shù)聲明決定了塊的類型(FB、FC、DB等)。當為塊參數(shù)類型形參分配實參時，可以使用物理地址，如FC 101，也可使用符號地址，如“valve
3) 指針參數(shù)類型
ALFA LAVAL SERVO DRIVE 31830-3350-1
ALFA LAVAL,2" 1X1 PLUG VALVE,STAINLES?S STEEL
Alfa Laval Think Top Replacement Control Top
45BY-3-02-SFY SPRINGER PARTS FOR ALFA LAVAL VALVES - BALL - OEM P/N 620377
ALFA LAVAL CPM-D-60-GC-?3 POL CONSTANT PRESSURE MODULATING INLET VALVE-NEW
882303760 CPM-I-D60 WITH MANUAL AND CONFORMITY CERT!!!
ALFA LAVAL FLOW SWITCH NSN 5930-01-448-26?32 NEW
ALFA LAVAL A3 PLUG VALVE 4"
TRI-CLOVER ALFA LAVAL BUTTERYFLY 3 WAY SHUTTER VALVES AIR OPERATED ETC
ALFA LAVAL SERVO DRIVE SS5
Alfa Laval Saunders DN 50 Valve
41212 Old-Stock, Alfa Laval Seperation 98 01 B Liner, 7-11/16" ID, 21-9/16" OD
SS ALFA LAVAL 1-WAY A3 PLUG VALVE 2"
45BY-3-02-SFY SPRINGER - BALL - ALFA LAVAL P/N 620377 VALVE REPLACEMENT BALL
Alfa Laval Refrigerant Heat Exchanger Type CB14-14H
ALFA LAVAL FILTERING DISK, FLUID PART # 1800-03365 NSN: 4330-14-479-43?89
ALFA LAVAL,PN10,1X1 2" PNUEMATIC VALVE,STAINLES?S STEEL
Alfa Laval Refrigerant Heat Exchanger, Model: CB76 - 40H S54
Alfa Laval Saunders Diaphragm Valve DN50 1.75" 34598 SS
Alfa Laval Saunders DN 25 Valve
2 Inch Tri Clamp Diaphram Valve Alfa Laval Saunders Stainless Steel USDA/A3/3A
ALFA LAVAL,SRC-W-3A?-2.5-9-20H W/HD SPRING,PLUG VALVE
45BY-21/2-02-S?FY SPRINGER - BALL - ALFA LAVAL P/N 620262 VALVE REPLACEMENT BALL
1.5 Inch Tri Clamp Diaphram Valve Alfa Laval Crane Saunders Stainless Steel 316L
1.5 In Valve Tri Clamp Alfa Laval Saunders Diaphram Stainless Steel 316L
ALFA LAVAL,SRC-W-3A?-2.5-7-20H W/HD SPRING, VALVE
Alfa-Laval model NB26-34H brazed plate heat exchanger
Alfa Laval Saunders EC Piston Actuator
ALFA LAVAL SAUNDERS EC PISTON ACTUATOR
ALFA LAVAL LKLA PNEUMATIC VALVE WITH 2 1/2" BUTTERFLY
ALFA LAVAL,3"X 3"- 4" STAINLESS STEEL PNUEMATIC VALVE
Alfa Laval Heat Exchanger
Alfa Laval 10939820 Refrigerant Heat Exchanger
Caterpillar/Al?faLaval Plate Heat Exchanger Plate As-New
TRI-CLOVER AIR OP VALVE SANITARY ALFA LAVAL
New Alfa Laval A10b Heat Exchanger Channel Plate 304 SS
Saunders - Via Alfa Laval air actuator
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Accuray 9-083161-001 Circuit Board #26434
Accuray 1-069846-001 Circuit Board #26437
Accuray 9-067451-002 Circuit Board #26439
Accuray 5-067457-001 Circuit Board #26441
ACCURAY 3-064843-002 B PROCESS INTERFACE CIRCUIT MODULE CARD 56990
Accuray 7-084963-001 L1 Circuit Board #26455
AccuRay 064811-002 OP2 Operator Interface Lamp Driver
ACCURAY 061595-003 61595 SCANNER PWA SSI SENSOR CONTROL BOARD 57481
ACCURAY 64844-0C2 PROCESS INTERFACE BOARD EXCELLENT CONDITION
Accuray 2-066692-001 Circuit Board #26435
ACCURAY ED IAC SCANNER 085352-003 CONTROL CIRCUIT PCB PRINTED BOARD CARD 59002
ACCURAY 2-064828-002 USPP 2064828002
ACCURAY 4-064859-002 USPP 4064859002
ACCURAY 085355-001 USPP 085355001
ACCURAY 3-082318-001 REV. G/H POWER SUPPLY ASSEMBLY SCANNER CONTROLLER 51973
Accuray 6-067472-001 Circuit Board #26443
Accuray 8-069229-001 Circuit Board #26444
HONEYWELL 60130571-004 REV.B6 ACCURAY SCANNER BOARD CARD MODULE PCB 59144
ACCURAY 083143-001 SCANNER POWER FAIL DETECTOR BOARD CARD 59019
ACCURAY 2085155001 NSPP 2085155001
ACCURAY 2-064828-002 064829-003 OPERATOR INTERFACE PCB CIRCUIT MODULE CARD 58656
ACCURAY 2-064828-002 064829-003 OPERATOR INTERFACE I PCB CIRCUIT MODULE 58655
ACCURAY 2-064828-002 064829-003 OPERATOR INTERFACE PCB CIRCUIT MODULE CARD 58653
ACCURAY 085345-001 REV.C OAD SCANNER CONTROL MODULE CARD 59005
ACCURAY 4-083885-001 SCANNER CONTROL BOARD MODULE CARD PCB 59000
ACCURAY 64844-011 USPP 64844011
ABB AUTOMATION 086348-001 ECF ACCURAY PC CIRCUIT CONTROL BOARD CARD MODULE 59029
ACCURAY 2085155001 USPP 2085155001
ABB ACCURAY 8-061588-002 B INTERFACE INPUT/OUTPUT I/O CIRCUIT BOARD MODULE 56991
ABB ACCURAY 7-083882-001 PC CIRCUIT BOARD SW SERVE MODULE CARD 56994
ACCURAY 8-074518-001 PC BOARD 8074518001
ACCURAY 2-064810-002 064811-002 OPERATOR INTERFACE LAMP DRIVER MODULE CARD 58652
HONEYWELL 60130571-004 REV.B5 ACCURAY SCANNER BOARD CARD MODULE PCB 55218
ACCURAY 064860-003 USPP 064860003
ACCURAY 5-064850-001
ACCURAY 5-064850-001
AccuRay 5-064850-001
ACCURAY 3-064843-002 INTERFACE CARD 3064843002
ACCURAY 2-069241-001 PC BOARD 2069241001
ACCURAY 9-067451-002 PC BOARD 9067451002
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Ametek/US Gauge Solfrunt Pressure Gauge Fig #1981 0-160# 4-1/2" 1/2" ANPT (NIB)
Ametek/US Gauge Solfrunt Pressure Gauge Fig #1980 0-160# 4-1/2" 1/2" ANPT (NIB)
AMETEK DREXELBROOK SENSOR
AIRCRAFT DC9/MD80 HYD FLUID QUANTITY IND P/N SRL-12J
AIRCRAFT DC9/MD80 LOADMETER IND P/N 8AW61LAS1
AMETEK PANALARM SC10-120A USED 8 PIN ALARM RELAY SC10120A
AMETEK PANALARM SC-10 USED 8 PIN ALARM RELAY SC10
*AMETEK 3959724
*AMETEK 33505
Ametek Power Controller - Model SCPF1 Series
# AMETEK. PRESSURE / TEMP GUAGE. C - PT 1X810. 2 - 1/2 " PT
AMETEK-PANALAR?M 90-AX1 24VDC WB-3 SIGNAL APPLIANCE SYSTEM UNIT NEW
Ametek Hunter Spring 2200 Grams Force Gauge
Ametek USG Gauge 0-30 IN. HG. Vacuum
Ametek USG Pressure Gauge 0-100PSI 4-1/4" Face
AMETEK SPTV4.8X140 1/8" PRESSURE TRANSDUCER 1.2 TO 4.8 PSIG RANGE
Push Pull Gage Ametek L-10M
AMETEK PANALARM NT2-24D 24V NOVATONE ELECTRONIC AUDIBLE ALARM SIREN HORN
AMETEK CONN & CABLE ASSY 1746/2500
GOOD USED AMETEK DREXELBROOK ZTRON OUTPUT MODULE 402-3200 4023200
PANALARM AMETEK SERIES 70-TFS5 SEQUENCE LOCK CIRCUIT CARD BOARD 24V 70BD 13375
NIB AMETEK/USG THERMOMETER 9" BT-31 150-750o F 1/2" NPT
Ametek Gemco Switch 1950-1-B-B-AO SPDT 1 Pole
Ametek Liquid Filled Gauge 30 in Hg X 0 PSI 4-1/2" Face Stainless Steel
SCIENTIFIC COLUMBUS/AMETE?K XLGI10S1-A TRANSDUCER ***NNB***
Ametek / USG Pressure Gauge 0-20 kPa 4-1/2"
SAZ-4201ER *NEW* OE Solenoid for Prestolite, Ametek 12V
Ametek US Gauge 1913 1000 psi 1/2 ANPT LBM size 4 1/2
Ametek Hunter Spring LN-22, "Newtons" Mechanical Force Gauge
Ametek Hunter Spring L-02, Mechanical Force Gauge
AMETEK USG SOLFRUNT GAUGE, 3/4", 1/4"
Ametek Pressure Gauge 1933 60 PSI *NEW*
NIB Ametek US Gauge DTT-8304 Digital Thermometer DT8300
NIB USG AMETEK SOLID FRONT 160PSI 4.5" GAUGE #150026
Ametek L-30 Depth Meter
Ametek 119419-00 Blower / Vacuum Motor
Lamb Motor Single Stage 5.7 Thru Flow Ball Bearing 120V
Ametek 1707 Tak-Ette Portable Mechanical Tachometer USA
Ametek Vacuum Motor #118154-54
NOS! AMETEK / ROTRON MUFFLER / SILENCER 523625 14.5"
AMETEK TYPE TK DIAPHRAGM SEAL 1500 PSIG WITH WIKA GAUGE
AMETEK INC. PANALARM ACS-8 8 PIN RELAY
NEW AMETEK AIR VOLUME CONTROL 148540A FOR DEEP WELL/JET PUMPS
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